plugins

Signed-off-by: Jeff <jeff@gotenzing.com>

+MC4WP: Mailchimp for WordPress
+======================
+![PHP status](https://github.com/ibericode/mailchimp-for-wordpress/workflows/PHP/badge.svg)
+![ESLint status](https://github.com/ibericode/mailchimp-for-wordpress/workflows/ESLint/badge.svg)
+![Active installs](https://img.shields.io/wordpress/plugin/installs/mailchimp-for-wp.svg)
+![Downloads](https://img.shields.io/wordpress/plugin/dt/mailchimp-for-wp.svg)
+[![Rating](https://img.shields.io/wordpress/plugin/r/mailchimp-for-wp.svg)](https://wordpress.org/support/plugin/mailchimp-for-wp/reviews/)
+[![License: GPLv3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
+
+Here, you can browse the source code of the [MC4WP: Mailchimp for WordPress Plugin](https://wordpress.org/plugins/mailchimp-for-wp/), find and discuss open issues or contribute code to the plugin.
+
+Requirements
+--------------
+
+- PHP version 7.2 or higher
+- WordPress version 4.6 or higher
+
+
+Installation
+------------
+
+If you just want to install this plugin on your WordPress site, please download and install the latest version from WordPress.org: [Mailchimp for WordPress plugin on WordPress.org](https://wordpress.org/plugins/mailchimp-for-wp/).
+
+To install the development version, take the following steps:
+
+1. Clone the GitHub repository:
+	```
+	git clone https://github.com/ibericode/mailchimp-for-wordpress.git mailchimp-for-wp
+	```
+
+1. Install Composer dependencies:
+	```sh 
+	composer install 
+	```
+
+1. Install NPM dependencies:
+	```
+	npm install
+	```
+
+1. Generate plugin asset files:
+	```
+	npm run build 
+	```
+
+1. Activate the plugin in your WordPress admin panel.
+
+Bugs
+----
+If you think you've found a bug, [please open an issue here](https://github.com/ibericode/mailchimp-for-wordpress/issues?state=open)!
+
+Translations
+-------------
+You can help [help translate Mailchimp for WordPress](https://translate.wordpress.org/projects/wp-plugins/mailchimp-for-wp/stable/) on WordPress.org.
+
+Support
+-------
+This is a developer's portal for the Mailchimp for WordPress plugin and should not be used for support.
+Please visit the [Mailchimp for WordPress support forum on WordPress.org](https://wordpress.org/support/plugin/mailchimp-for-wp).
+
+If you need priority support, [upgrade to Mailchimp for WordPress Premium](https://www.mc4wp.com/).
+
+Developers
+----------
+
+Looking for code snippets? Have a look at the [sample code snippets directory](https://github.com/ibericode/mailchimp-for-wordpress/tree/master/sample-code-snippets) for a collection of modification examples.
+

+.mc4wp-checkbox-__INTEGRATION_SLUG__{clear:both;width:auto;display:block;position:static}.mc4wp-checkbox-__INTEGRATION_SLUG__ input{float:none;vertical-align:middle;-webkit-appearance:checkbox;width:auto;max-width:21px;margin:0 6px 0 0;padding:0;position:static;display:inline-block!important}.mc4wp-checkbox-__INTEGRATION_SLUG__ label{float:none;cursor:pointer;width:auto;margin:0 0 16px;display:block;position:static}
\ No newline at end of file

+.mc4wp-form input[name^=_mc4wp_honey]{display:none!important}.mc4wp-form-basic{margin:1em 0}.mc4wp-form-basic label,.mc4wp-form-basic input{box-sizing:border-box;cursor:auto;vertical-align:baseline;width:auto;height:auto;line-height:normal;display:block}.mc4wp-form-basic label:after,.mc4wp-form-basic input:after{content:"";clear:both;display:table}.mc4wp-form-basic label{margin-bottom:6px;font-weight:700;display:block}.mc4wp-form-basic input[type=text],.mc4wp-form-basic input[type=email],.mc4wp-form-basic input[type=tel],.mc4wp-form-basic input[type=url],.mc4wp-form-basic input[type=date],.mc4wp-form-basic textarea,.mc4wp-form-basic select{width:100%;max-width:480px;min-height:32px}.mc4wp-form-basic input[type=number]{min-width:40px}.mc4wp-form-basic input[type=checkbox],.mc4wp-form-basic input[type=radio]{border:0;width:13px;height:13px;margin:0 6px 0 0;padding:0;display:inline-block;position:relative}.mc4wp-form-basic input[type=checkbox]{-webkit-appearance:checkbox;-moz-appearance:checkbox;appearance:checkbox}.mc4wp-form-basic input[type=radio]{-webkit-appearance:radio;-moz-appearance:radio;appearance:radio}.mc4wp-form-basic input[type=submit],.mc4wp-form-basic button,.mc4wp-form-basic input[type=button]{cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;display:inline-block}.mc4wp-form-basic label>span,.mc4wp-form-basic li>label{font-weight:400}.mc4wp-alert{color:#c09853;clear:both}.mc4wp-success{color:#468847}.mc4wp-notice{color:#3a87ad}.mc4wp-error{color:#cd5c5c}.rtl .mc4wp-form-basic input[type=checkbox],.rtl .mc4wp-form-basic input[type=radio]{margin:0 0 0 6px}
\ No newline at end of file

+.mc4wp-form input[name^=_mc4wp_honey]{display:none!important}.mc4wp-form-theme{margin:1em 0}.mc4wp-form-theme label,.mc4wp-form-theme input{box-sizing:border-box;cursor:auto;vertical-align:baseline;width:auto;height:auto;line-height:normal;display:block}.mc4wp-form-theme label:after,.mc4wp-form-theme input:after{content:"";clear:both;display:table}.mc4wp-form-theme label{margin-bottom:6px;font-weight:700;display:block}.mc4wp-form-theme input[type=text],.mc4wp-form-theme input[type=email],.mc4wp-form-theme input[type=tel],.mc4wp-form-theme input[type=url],.mc4wp-form-theme input[type=date],.mc4wp-form-theme textarea,.mc4wp-form-theme select{vertical-align:middle;text-shadow:none;background:#fff;border:1px solid #ccc;border-radius:2px;outline:0;width:100%;max-width:480px;height:auto;min-height:32px;padding:8px 16px;line-height:1.42857;color:#555!important}.mc4wp-form-theme textarea{height:auto}.mc4wp-form-theme input[readonly],.mc4wp-form-theme input[disabled]{background-color:#eee}.mc4wp-form-theme input[type=number]{min-width:40px}.mc4wp-form-theme input[type=checkbox],.mc4wp-form-theme input[type=radio]{border:0;width:13px;height:13px;margin:0 6px 0 0;padding:0;display:inline-block;position:relative}.mc4wp-form-theme input[type=checkbox]{-webkit-appearance:checkbox;-moz-appearance:checkbox;appearance:checkbox}.mc4wp-form-theme input[type=radio]{-webkit-appearance:radio;-moz-appearance:radio;appearance:radio}.mc4wp-form-theme button,.mc4wp-form-theme input[type=submit],.mc4wp-form-theme input[type=button]{cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;text-align:center;white-space:nowrap;vertical-align:middle;user-select:none;text-shadow:none;filter:none;background:0 0;border:1px solid #0000;border-radius:2px;width:auto;height:auto;padding:8px 16px;font-weight:400;line-height:1.42857;display:inline-block}.mc4wp-form-theme button:hover,.mc4wp-form-theme input[type=submit]:hover,.mc4wp-form-theme input[type=button]:hover,.mc4wp-form-theme button:focus,.mc4wp-form-theme input[type=submit]:focus,.mc4wp-form-theme input[type=button]:focus{color:#333;background:0 0;outline:0;text-decoration:none}.mc4wp-form-theme label>span,.mc4wp-form-theme li>label{font-weight:400}.mc4wp-alert{color:#c09853;clear:both}.mc4wp-success{color:#468847}.mc4wp-notice{color:#3a87ad}.mc4wp-error{color:#cd5c5c}.rtl .mc4wp-form-theme input[type=checkbox],.rtl .mc4wp-form-theme input[type=radio]{margin:0 0 0 6px}.mc4wp-form-theme-dark button,.mc4wp-form-theme-dark input[type=submit],.mc4wp-form-theme-dark input[type=button]{border-color:#1e1e1e;color:#fff!important;background-color:#444!important}.mc4wp-form-theme-dark button:hover,.mc4wp-form-theme-dark input[type=submit]:hover,.mc4wp-form-theme-dark input[type=button]:hover,.mc4wp-form-theme-dark button:focus,.mc4wp-form-theme-dark input[type=submit]:focus,.mc4wp-form-theme-dark input[type=button]:focus{border-color:#000;color:#fff!important;background-color:#1e1e1e!important}.mc4wp-form-theme-dark input[type=text]:focus,.mc4wp-form-theme-dark input[type=email]:focus,.mc4wp-form-theme-dark input[type=tel]:focus,.mc4wp-form-theme-dark input[type=url]:focus,.mc4wp-form-theme-dark input[type=date]:focus,.mc4wp-form-theme-dark textarea:focus,.mc4wp-form-theme-dark select:focus{border-color:#6a6a6a}.mc4wp-form-theme-light button,.mc4wp-form-theme-light input[type=submit],.mc4wp-form-theme-light input[type=button]{border-color:#d9d9d9;color:#000!important;background-color:#fff!important}.mc4wp-form-theme-light button:hover,.mc4wp-form-theme-light input[type=submit]:hover,.mc4wp-form-theme-light input[type=button]:hover,.mc4wp-form-theme-light button:focus,.mc4wp-form-theme-light input[type=submit]:focus,.mc4wp-form-theme-light input[type=button]:focus{border-color:#b3b3b3;color:#000!important;background-color:#d9d9d9!important}.mc4wp-form-theme-light input[type=text]:focus,.mc4wp-form-theme-light input[type=email]:focus,.mc4wp-form-theme-light input[type=tel]:focus,.mc4wp-form-theme-light input[type=url]:focus,.mc4wp-form-theme-light input[type=date]:focus,.mc4wp-form-theme-light textarea:focus,.mc4wp-form-theme-light select:focus{border-color:#d9d9d9}.mc4wp-form-theme-red button,.mc4wp-form-theme-red input[type=submit],.mc4wp-form-theme-red input[type=button]{border-color:#b52b27;color:#fff!important;background-color:#d9534f!important}.mc4wp-form-theme-red button:hover,.mc4wp-form-theme-red input[type=submit]:hover,.mc4wp-form-theme-red input[type=button]:hover,.mc4wp-form-theme-red button:focus,.mc4wp-form-theme-red input[type=submit]:focus,.mc4wp-form-theme-red input[type=button]:focus{border-color:#761c19;color:#fff!important;background-color:#b52b27!important}.mc4wp-form-theme-red input[type=text]:focus,.mc4wp-form-theme-red input[type=email]:focus,.mc4wp-form-theme-red input[type=tel]:focus,.mc4wp-form-theme-red input[type=url]:focus,.mc4wp-form-theme-red input[type=date]:focus,.mc4wp-form-theme-red textarea:focus,.mc4wp-form-theme-red select:focus{border-color:#e7908e}.mc4wp-form-theme-blue button,.mc4wp-form-theme-blue input[type=submit],.mc4wp-form-theme-blue input[type=button]{border-color:#2a6496;color:#fff!important;background-color:#428bca!important}.mc4wp-form-theme-blue button:hover,.mc4wp-form-theme-blue input[type=submit]:hover,.mc4wp-form-theme-blue input[type=button]:hover,.mc4wp-form-theme-blue button:focus,.mc4wp-form-theme-blue input[type=submit]:focus,.mc4wp-form-theme-blue input[type=button]:focus{border-color:#193c5a;color:#fff!important;background-color:#2a6496!important}.mc4wp-form-theme-blue input[type=text]:focus,.mc4wp-form-theme-blue input[type=email]:focus,.mc4wp-form-theme-blue input[type=tel]:focus,.mc4wp-form-theme-blue input[type=url]:focus,.mc4wp-form-theme-blue input[type=date]:focus,.mc4wp-form-theme-blue textarea:focus,.mc4wp-form-theme-blue select:focus{border-color:#7eb0db}.mc4wp-form-theme-green button,.mc4wp-form-theme-green input[type=submit],.mc4wp-form-theme-green input[type=button]{border-color:#3d8b3d;color:#fff!important;background-color:#5cb85c!important}.mc4wp-form-theme-green button:hover,.mc4wp-form-theme-green input[type=submit]:hover,.mc4wp-form-theme-green input[type=button]:hover,.mc4wp-form-theme-green button:focus,.mc4wp-form-theme-green input[type=submit]:focus,.mc4wp-form-theme-green input[type=button]:focus{border-color:#255625;color:#fff!important;background-color:#3d8b3d!important}.mc4wp-form-theme-green input[type=text]:focus,.mc4wp-form-theme-green input[type=email]:focus,.mc4wp-form-theme-green input[type=tel]:focus,.mc4wp-form-theme-green input[type=url]:focus,.mc4wp-form-theme-green input[type=date]:focus,.mc4wp-form-theme-green textarea:focus,.mc4wp-form-theme-green select:focus{border-color:#91cf91}
\ No newline at end of file

+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   width="16"
+   height="16"
+   viewBox="0 0 16 16"
+   version="1.1">
+    <g
+       fill="#a0a5aa">
+      <path
+      	opacity="1"
+      	fill="#a0a5aa"
+      	fill-opacity="1"
+      	stroke="none"
+         d="M 8.0097656 0.052734375 A 8 8 0 0 0 0.009765625 8.0527344 A 8 8 0 0 0 8.0097656 16.052734 A 8 8 0 0 0 16.009766 8.0527344 A 8 8 0 0 0 8.0097656 0.052734375 z M 9.2597656 4.171875 C 9.3205456 4.171875 9.9296146 5.0233822 10.611328 6.0664062 C 11.293041 7.1094313 12.296018 8.5331666 12.841797 9.2285156 L 13.833984 10.492188 L 13.316406 11.041016 C 13.031321 11.342334 12.708299 11.587891 12.599609 11.587891 C 12.253798 11.587891 11.266634 10.490156 10.349609 9.0859375 C 9.8610009 8.3377415 9.4126385 7.7229 9.3515625 7.71875 C 9.2904825 7.71455 9.2402344 8.3477011 9.2402344 9.1269531 L 9.2402344 10.544922 L 8.5839844 10.982422 C 8.2233854 11.223015 7.8735746 11.418294 7.8066406 11.417969 C 7.7397106 11.417644 7.4861075 10.997223 7.2421875 10.482422 C 6.9982675 9.9676199 6.6560079 9.3946444 6.4824219 9.2089844 L 6.1679688 8.8710938 L 6.0664062 9.34375 C 5.7203313 10.974656 5.6693219 11.090791 5.0917969 11.505859 C 4.5805569 11.873288 4.2347982 12.017623 4.1914062 11.882812 C 4.1839062 11.859632 4.1482681 11.574497 4.1113281 11.25 C 3.9708341 10.015897 3.5347399 8.7602861 2.8105469 7.5019531 C 2.5672129 7.0791451 2.5711235 7.0651693 2.9765625 6.8320312 C 3.2046215 6.7008903 3.5466561 6.4845105 3.7363281 6.3515625 C 4.0587811 6.1255455 4.1076376 6.1466348 4.4941406 6.6679688 C 4.8138896 7.0992628 4.9275606 7.166285 4.9941406 6.96875 C 5.0960956 6.666263 6.181165 5.8574219 6.484375 5.8574219 C 6.600668 5.8574219 6.8857635 6.1981904 7.1171875 6.6152344 C 7.3486105 7.0322784 7.5790294 7.3728809 7.6308594 7.3730469 C 7.7759584 7.3735219 7.9383234 5.8938023 7.8339844 5.5195312 C 7.7605544 5.2561423 7.8865035 5.0831575 8.4453125 4.6796875 C 8.8327545 4.3999485 9.1989846 4.171875 9.2597656 4.171875 z "
+         id="path5822" />
+    </g>
+</svg>

+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="64"
+   height="64"
+   viewBox="0 0 64 64"
+   version="1.1"
+   id="SVGRoot"
+   inkscape:version="0.92.4 5da689c313, 2019-01-14"
+   sodipodi:docname="mc4wp-logo-red-on-white.svg">
+  <g
+     inkscape:groupmode="layer"
+     id="layer2"
+     inkscape:label="Layer 2">
+    <circle
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:none;stroke-opacity:1"
+       id="path5822"
+       cx="32"
+       cy="32"
+       r="32" />
+  </g>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       style="fill:#cc4444;fill-opacity:1;stroke:none;"
+       d="m 16,47.324799 c -0.02985,-0.09271 -0.175159,-1.230558 -0.322927,-2.528543 -0.561978,-4.936413 -2.305204,-9.961206 -5.201976,-14.994537 -0.9733359,-1.691234 -0.9585997,-1.750867 0.663154,-2.683422 0.912236,-0.524562 2.279359,-1.38885 3.038049,-1.920641 1.289813,-0.904069 1.486868,-0.821985 3.032878,1.26335 1.278999,1.725178 1.731406,1.998919 1.997727,1.208779 0.407819,-1.209946 4.748289,-4.450438 5.96113,-4.450438 0.465172,0 1.603153,1.364871 2.528847,3.033047 0.925694,1.668177 1.852705,3.03359 2.060024,3.034253 0.580399,0.0019 1.2257,-5.915967 0.808345,-7.413054 -0.293707,-1.053553 0.21226,-1.748685 2.447515,-3.362568 1.549769,-1.118954 3.016679,-2.034461 3.2598,-2.034461 0.243121,0 2.673101,3.413534 5.399956,7.585632 2.726854,4.172097 6.744105,9.861321 8.927221,12.642719 l 3.969305,5.057088 -2.073345,2.191405 c -1.140339,1.205272 -2.429057,2.191404 -2.863817,2.191404 -1.383243,0 -5.331006,-4.389741 -8.999106,-10.006614 -1.954436,-2.992783 -3.753407,-5.455006 -3.997711,-5.471606 -0.244305,-0.0166 -0.44419,2.520101 -0.44419,5.637112 v 5.667295 l -2.62254,1.749768 c -1.442397,0.962371 -2.841596,1.748706 -3.109332,1.747409 -0.267735,-0.0013 -1.285075,-1.687162 -2.260756,-3.746367 -0.97568,-2.059206 -2.342064,-4.351629 -3.036409,-5.094272 l -1.262444,-1.350262 -0.401863,1.893807 c -1.3843,6.523625 -1.59298,6.985894 -3.90308,8.646166 C 17.549496,47.286963 16.173566,47.864041 16,47.324799 Z"
+       id="path4520"
+       inkscape:connector-curvature="0" />
+  </g>
+</svg>

+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="64"
+   height="64"
+   viewBox="0 0 64 64"
+   version="1.1"
+   id="SVGRoot"
+   inkscape:version="0.92.4 5da689c313, 2019-01-14"
+   sodipodi:docname="mc4wp-logo-white-on-red.svg">
+  <g
+     inkscape:groupmode="layer"
+     id="layer2"
+     inkscape:label="Layer 2">
+    <circle
+       style="opacity:1;fill:#cc4444;fill-opacity:1;stroke:none;stroke-opacity:1"
+       id="path5822"
+       cx="32"
+       cy="32"
+       r="32" />
+  </g>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       style="fill:#ffffff;fill-opacity:1;stroke:none;"
+       d="m 16,47.324799 c -0.02985,-0.09271 -0.175159,-1.230558 -0.322927,-2.528543 -0.561978,-4.936413 -2.305204,-9.961206 -5.201976,-14.994537 -0.9733359,-1.691234 -0.9585997,-1.750867 0.663154,-2.683422 0.912236,-0.524562 2.279359,-1.38885 3.038049,-1.920641 1.289813,-0.904069 1.486868,-0.821985 3.032878,1.26335 1.278999,1.725178 1.731406,1.998919 1.997727,1.208779 0.407819,-1.209946 4.748289,-4.450438 5.96113,-4.450438 0.465172,0 1.603153,1.364871 2.528847,3.033047 0.925694,1.668177 1.852705,3.03359 2.060024,3.034253 0.580399,0.0019 1.2257,-5.915967 0.808345,-7.413054 -0.293707,-1.053553 0.21226,-1.748685 2.447515,-3.362568 1.549769,-1.118954 3.016679,-2.034461 3.2598,-2.034461 0.243121,0 2.673101,3.413534 5.399956,7.585632 2.726854,4.172097 6.744105,9.861321 8.927221,12.642719 l 3.969305,5.057088 -2.073345,2.191405 c -1.140339,1.205272 -2.429057,2.191404 -2.863817,2.191404 -1.383243,0 -5.331006,-4.389741 -8.999106,-10.006614 -1.954436,-2.992783 -3.753407,-5.455006 -3.997711,-5.471606 -0.244305,-0.0166 -0.44419,2.520101 -0.44419,5.637112 v 5.667295 l -2.62254,1.749768 c -1.442397,0.962371 -2.841596,1.748706 -3.109332,1.747409 -0.267735,-0.0013 -1.285075,-1.687162 -2.260756,-3.746367 -0.97568,-2.059206 -2.342064,-4.351629 -3.036409,-5.094272 l -1.262444,-1.350262 -0.401863,1.893807 c -1.3843,6.523625 -1.59298,6.985894 -3.90308,8.646166 C 17.549496,47.286963 16.173566,47.864041 16,47.324799 Z"
+       id="path4520"
+       inkscape:connector-curvature="0" />
+  </g>
+</svg>

+(()=>{const e=window.wp.i18n.__,{registerBlockType:t}=window.wp.blocks,{SelectControl:i}=window.wp.components,o=window.mc4wp_forms;t("mailchimp-for-wp/form",{title:e("Mailchimp for WordPress Form"),description:e("Block showing a Mailchimp for WordPress sign-up form"),category:"widgets",attributes:{id:{type:"int"}},icon:React.createElement("svg",{width:"16",height:"16",viewBox:"0 0 16 16",version:"1.1"},React.createElement("path",{opacity:"1",fill:"#a0a5aa",fillOpacity:"1",stroke:"none",d:"M 8.0097656 0.052734375 A 8 8 0 0 0 0.009765625 8.0527344 A 8 8 0 0 0 8.0097656 16.052734 A 8 8 0 0 0 16.009766 8.0527344 A 8 8 0 0 0 8.0097656 0.052734375 z M 9.2597656 4.171875 C 9.3205456 4.171875 9.9296146 5.0233822 10.611328 6.0664062 C 11.293041 7.1094313 12.296018 8.5331666 12.841797 9.2285156 L 13.833984 10.492188 L 13.316406 11.041016 C 13.031321 11.342334 12.708299 11.587891 12.599609 11.587891 C 12.253798 11.587891 11.266634 10.490156 10.349609 9.0859375 C 9.8610009 8.3377415 9.4126385 7.7229 9.3515625 7.71875 C 9.2904825 7.71455 9.2402344 8.3477011 9.2402344 9.1269531 L 9.2402344 10.544922 L 8.5839844 10.982422 C 8.2233854 11.223015 7.8735746 11.418294 7.8066406 11.417969 C 7.7397106 11.417644 7.4861075 10.997223 7.2421875 10.482422 C 6.9982675 9.9676199 6.6560079 9.3946444 6.4824219 9.2089844 L 6.1679688 8.8710938 L 6.0664062 9.34375 C 5.7203313 10.974656 5.6693219 11.090791 5.0917969 11.505859 C 4.5805569 11.873288 4.2347982 12.017623 4.1914062 11.882812 C 4.1839062 11.859632 4.1482681 11.574497 4.1113281 11.25 C 3.9708341 10.015897 3.5347399 8.7602861 2.8105469 7.5019531 C 2.5672129 7.0791451 2.5711235 7.0651693 2.9765625 6.8320312 C 3.2046215 6.7008903 3.5466561 6.4845105 3.7363281 6.3515625 C 4.0587811 6.1255455 4.1076376 6.1466348 4.4941406 6.6679688 C 4.8138896 7.0992628 4.9275606 7.166285 4.9941406 6.96875 C 5.0960956 6.666263 6.181165 5.8574219 6.484375 5.8574219 C 6.600668 5.8574219 6.8857635 6.1981904 7.1171875 6.6152344 C 7.3486105 7.0322784 7.5790294 7.3728809 7.6308594 7.3730469 C 7.7759584 7.3735219 7.9383234 5.8938023 7.8339844 5.5195312 C 7.7605544 5.2561423 7.8865035 5.0831575 8.4453125 4.6796875 C 8.8327545 4.3999485 9.1989846 4.171875 9.2597656 4.171875 z "})),supports:{html:!1},edit:function(t){const r=o.map((e=>({label:e.name,value:e.id})));return void 0===t.attributes.id&&o.length>0&&t.setAttributes({id:o[0].id}),React.createElement("div",{style:{backgroundColor:"#f8f9f9",padding:"14px"}},React.createElement(i,{label:e("Mailchimp for WordPress Sign-up Form"),value:t.attributes.id,options:r,onChange:e=>{t.setAttributes({id:e})}}))},save:function(e){return null}})})();
\ No newline at end of file

+(()=>{var e={1419:e=>{e.exports=function(e){const t=window.pageXOffset||document.documentElement.scrollLeft,o=function(e){const t=document.body,o=document.documentElement,n=e.getBoundingClientRect(),r=o.clientHeight,i=Math.max(t.scrollHeight,t.offsetHeight,o.clientHeight,o.scrollHeight,o.offsetHeight),c=n.bottom-r/2-n.height/2,s=i-r;return Math.min(c+window.pageYOffset,s)}(e);window.scrollTo(t,o)}}},t={};function o(n){var r=t[n];if(void 0!==r)return r.exports;var i=t[n]={exports:{}};return e[n](i,i.exports,o),i.exports}o.n=e=>{var t=e&&e.__esModule?()=>e.default:()=>e;return o.d(t,{a:t}),t},o.d=(e,t)=>{for(var n in t)o.o(t,n)&&!o.o(e,n)&&Object.defineProperty(e,n,{enumerable:!0,get:t[n]})},o.o=(e,t)=>Object.prototype.hasOwnProperty.call(e,t),(()=>{"use strict";var e=o(1419),t=o.n(e);const n=window.mc4wp_submitted_form,r=window.mc4wp.forms;if(n){const e=document.getElementById(n.element_id);!function(e,o,i,c){const s=Date.now(),d=document.body.clientHeight;i&&e.setData(c),window.scrollY<=10&&n.auto_scroll&&t()(e.element),window.addEventListener("load",(function(){r.trigger("submitted",[e]),i?r.trigger("error",[e,i]):(r.trigger("success",[e,c]),r.trigger(o,[e,c]),"updated_subscriber"===o&&r.trigger("subscribed",[e,c,!0]));const l=Date.now()-s;n.auto_scroll&&l>1e3&&l<2e3&&document.body.clientHeight!==d&&t()(e.element)}))}(r.getByElement(e),n.event,n.errors,n.data)}})()})();
\ No newline at end of file

+(()=>{var e={9885:e=>{function t(){this.listeners={}}t.prototype.emit=function(e,t){this.listeners[e]=this.listeners[e]??[],this.listeners[e].forEach((e=>e.apply(null,t)))},t.prototype.on=function(e,t){this.listeners[e]=this.listeners[e]??[],this.listeners[e].push(t)},e.exports=t},5626:()=>{function e(e){const t=!!e.getAttribute("data-show-if"),n=t?e.getAttribute("data-show-if").split(":"):e.getAttribute("data-hide-if").split(":"),r=n[0],i=(n.length>1?n[1]:"*").split("|"),o=function(e,t){const n=[],r=e.querySelectorAll('input[name="'+t+'"],select[name="'+t+'"],textarea[name="'+t+'"]');for(let e=0;e<r.length;e++)("radio"!==r[e].type&&"checkbox"!==r[e].type||r[e].checked)&&n.push(r[e].value);return n}(function(e){let t=e;for(;t.parentElement;)if(t=t.parentElement,"FORM"===t.tagName)return t;return null}(e),r);let s=!1;for(let e=0;e<o.length&&!s;e++)s=i.indexOf(o[e])>-1||i.indexOf("*")>-1&&o[e].length>0;e.style.display=t?s?"":"none":s?"none":"";const a=e.querySelectorAll("input,select,textarea");for(let e=0;e<a.length;e++)(s||t)&&a[e].getAttribute("data-was-required")&&(a[e].required=!0,a[e].removeAttribute("data-was-required")),s&&t||!a[e].required||(a[e].setAttribute("data-was-required","true"),a[e].required=!1)}function t(){const t=document.querySelectorAll(".mc4wp-form [data-show-if],.mc4wp-form [data-hide-if]");for(let n=0;n<t.length;n++)e(t[n])}function n(t){if(!t.target||!t.target.form||t.target.form.className.indexOf("mc4wp-form")<0)return;const n=t.target.form.querySelectorAll("[data-show-if],[data-hide-if]");for(let t=0;t<n.length;t++)e(n[t])}document.addEventListener("keyup",n,!0),document.addEventListener("change",n,!0),document.addEventListener("mc4wp-refresh",t,!0),window.addEventListener("load",t),t()},6942:(e,t,n)=>{const r=n(2076),i=n(6564),o=function(e,t){this.id=e,this.element=t||document.createElement("form"),this.name=this.element.getAttribute("data-name")||"Form #"+this.id,this.errors=[],this.started=!1};o.prototype.setData=function(e){try{i(this.element,e)}catch(e){console.error(e)}},o.prototype.getData=function(){return r(this.element,{hash:!0,empty:!0})},o.prototype.getSerializedData=function(){return r(this.element,{hash:!1,empty:!0})},o.prototype.setResponse=function(e){this.element.querySelector(".mc4wp-response").innerHTML=e},o.prototype.reset=function(){this.setResponse(""),this.element.querySelector(".mc4wp-form-fields").style.display="",this.element.reset()},e.exports=o},9685:(e,t,n)=>{const r=n(6942),i=[],o=new(n(9885));function s(e,t){t=t||parseInt(e.getAttribute("data-id"))||0;const n=new r(t,e);return i.push(n),n}e.exports={get:function(e){e=parseInt(e);for(let t=0;t<i.length;t++)if(i[t].id===e)return i[t];return s(document.querySelector(".mc4wp-form-"+e),e)},getByElement:function(e){const t=e.form||e;for(let e=0;e<i.length;e++)if(i[e].element===t)return i[e];return s(t)},on:function(e,t){o.on(e,t)},trigger:function(e,t){"submit"===e||e.indexOf(".submit")>0?(o.emit(t[0].id+"."+e,t),o.emit(e,t)):window.setTimeout((function(){o.emit(t[0].id+"."+e,t),o.emit(e,t)}),10)}}},2076:e=>{var t=/^(?:submit|button|image|reset|file)$/i,n=/^(?:input|select|textarea|keygen)/i,r=/(\[[^\[\]]*\])/g;function i(e,t,n){if(0===t.length)return n;var r=t.shift(),o=r.match(/^\[(.+?)\]$/);if("[]"===r)return e=e||[],Array.isArray(e)?e.push(i(null,t,n)):(e._values=e._values||[],e._values.push(i(null,t,n))),e;if(o){var s=o[1],a=+s;isNaN(a)?(e=e||{})[s]=i(e[s],t,n):(e=e||[])[a]=i(e[a],t,n)}else e[r]=i(e[r],t,n);return e}function o(e,t,n){if(t.match(r))i(e,function(e){var t=[],n=new RegExp(r),i=/^([^\[\]]*)/.exec(e);for(i[1]&&t.push(i[1]);null!==(i=n.exec(e));)t.push(i[1]);return t}(t),n);else{var o=e[t];o?(Array.isArray(o)||(e[t]=[o]),e[t].push(n)):e[t]=n}return e}function s(e,t,n){return n=n.replace(/(\r)?\n/g,"\r\n"),n=(n=encodeURIComponent(n)).replace(/%20/g,"+"),e+(e?"&":"")+encodeURIComponent(t)+"="+n}e.exports=function(e,r){"object"!=typeof r?r={hash:!!r}:void 0===r.hash&&(r.hash=!0);for(var i=r.hash?{}:"",a=r.serializer||(r.hash?o:s),c=e&&e.elements?e.elements:[],l=Object.create(null),u=0;u<c.length;++u){var f=c[u];if((r.disabled||!f.disabled)&&f.name&&n.test(f.nodeName)&&!t.test(f.type)){var d=f.name,h=f.value;if("checkbox"!==f.type&&"radio"!==f.type||f.checked||(h=void 0),r.empty){if("checkbox"!==f.type||f.checked||(h=""),"radio"===f.type&&(l[f.name]||f.checked?f.checked&&(l[f.name]=!0):l[f.name]=!1),null==h&&"radio"==f.type)continue}else if(!h)continue;if("select-multiple"!==f.type)i=a(i,d,h);else{h=[];for(var p=f.options,m=!1,g=0;g<p.length;++g){var y=p[g],v=r.empty&&!y.value,w=y.value||v;y.selected&&w&&(m=!0,i=r.hash&&"[]"!==d.slice(d.length-2)?a(i,d+"[]",y.value):a(i,d,y.value))}!m&&r.empty&&(i=a(i,d,""))}}}if(r.empty)for(var d in l)l[d]||(i=a(i,d,""));return i}},6564:e=>{e.exports&&(e.exports=function e(t,n,r){for(const i in n){if(!n.hasOwnProperty(i))continue;const o=i;let s=n[i];if(void 0===s&&(s=""),null===s&&(s=""),void 0!==r&&(o=r+"["+i+"]"),s.constructor===Array)o+="[]";else if("object"==typeof s){e(t,s,o);continue}const a=t.elements.namedItem(o);if(!a)continue;const c=a.type||a[0].type;switch(c){default:a.value=s;break;case"radio":case"checkbox":{const e=s.constructor===Array?s:[s];for(let t=0;t<a.length;t++)a[t].checked=e.indexOf(a[t].value)>-1}break;case"select-multiple":{const e=s.constructor===Array?s:[s];for(let t=0;t<a.options.length;t++)a.options[t].selected=e.indexOf(a.options[t].value)>-1}break;case"select":case"select-one":a.value=s.toString()||s;break;case"date":a.value=new Date(s).toISOString().split("T")[0]}const l=new Event("change",{bubbles:!0});switch(c){default:a.dispatchEvent(l);break;case"radio":case"checkbox":for(let e=0;e<a.length;e++)a[e].checked&&a[e].dispatchEvent(l)}}})}},t={};function n(r){var i=t[r];if(void 0!==i)return i.exports;var o=t[r]={exports:{}};return e[r](o,o.exports,n),o.exports}const r=window.mc4wp||{},i=n(9685);function o(e,t){document.addEventListener(e,(e=>{if(!e.target)return;const n=e.target;("string"==typeof n.className&&n.className.indexOf("mc4wp-form")>-1||"function"==typeof n.matches&&n.matches(".mc4wp-form *"))&&t.call(e,e)}),!0)}n(5626),o("submit",(function(e){if(e.defaultPrevented)return;const t=i.getByElement(e.target);i.trigger("submit",[t,e])})),o("focus",(function(e){const t=i.getByElement(e.target);t.started||(i.trigger("started",[t,e]),t.started=!0)})),o("change",(function(e){const t=i.getByElement(e.target);i.trigger("change",[t,e])})),r.listeners&&([].forEach.call(r.listeners,(function(e){i.on(e.event,e.callback)})),delete r.listeners),r.forms=i,window.mc4wp=r})();
\ No newline at end of file

+(()=>{const e=window.mc4wp_vars.ajaxurl,t=window.mc4wp.settings,n=document.getElementById("notice-additional-fields");function i(){const t=[].filter.call(document.querySelectorAll(".mc4wp-list-input"),(e=>e.checked)).map((e=>e.value)).join(","),i=["EMAIL","FNAME","NAME","LNAME"];let l=!1;window.fetch(`${e}?action=mc4wp_get_list_details&ids=${t}`).then((e=>e.json())).then((e=>{e.forEach((e=>{e.merge_fields.forEach((e=>{e.required&&i.indexOf(e.tag)<0&&(l=!0)}))}))})).finally((()=>{n.style.display=l?"":"none"}))}n&&(i(),t.on("selectedLists.change",i))})();
\ No newline at end of file

+<?php
+
+require __DIR__ . '/includes/functions.php';
+require __DIR__ . '/includes/deprecated-functions.php';
+require __DIR__ . '/includes/forms/functions.php';
+require __DIR__ . '/includes/forms/admin-functions.php';
+require __DIR__ . '/includes/integrations/functions.php';
+
+// require API class manually because our classloader is case-sensitive
+require __DIR__ . '/includes/api/class-api-v3.php';
+
+// load other classes dynamically
+spl_autoload_register(function ($class) {
+	static $classmap = array(
+		'MC4WP_API_Connection_Exception' => __DIR__ . '/includes/api/class-connection-exception.php',
+		'MC4WP_API_Exception' => __DIR__ . '/includes/api/class-exception.php',
+		'MC4WP_API_Resource_Not_Found_Exception' => __DIR__ . '/includes/api/class-resource-not-found-exception.php',
+		'MC4WP_API_V3' => __DIR__ . '/includes/api/class-api-v3.php',
+		'MC4WP_API_V3_Client' => __DIR__ . '/includes/api/class-api-v3-client.php',
+		'MC4WP_Admin' => __DIR__ . '/includes/admin/class-admin.php',
+		'MC4WP_Admin_Ads' => __DIR__ . '/includes/admin/class-ads.php',
+		'MC4WP_Admin_Ajax' => __DIR__ . '/includes/admin/class-admin-ajax.php',
+		'MC4WP_Admin_Messages' => __DIR__ . '/includes/admin/class-admin-messages.php',
+		'MC4WP_Admin_Review_Notice' => __DIR__ . '/includes/admin/class-review-notice.php',
+		'MC4WP_Admin_Texts' => __DIR__ . '/includes/admin/class-admin-texts.php',
+		'MC4WP_Admin_Tools' => __DIR__ . '/includes/admin/class-admin-tools.php',
+		'MC4WP_AffiliateWP_Integration' => __DIR__ . '/integrations/affiliatewp/class-affiliatewp.php',
+		'MC4WP_BuddyPress_Integration' => __DIR__ . '/integrations/buddypress/class-buddypress.php',
+		'MC4WP_Comment_Form_Integration' => __DIR__ . '/integrations/wp-comment-form/class-comment-form.php',
+		'MC4WP_Contact_Form_7_Integration' => __DIR__ . '/integrations/contact-form-7/class-contact-form-7.php',
+		'MC4WP_Container' => __DIR__ . '/includes/class-container.php',
+		'MC4WP_Custom_Integration' => __DIR__ . '/integrations/custom/class-custom.php',
+		'MC4WP_Debug_Log' => __DIR__ . '/includes/class-debug-log.php',
+		'MC4WP_Debug_Log_Reader' => __DIR__ . '/includes/class-debug-log-reader.php',
+		'MC4WP_Dynamic_Content_Tags' => __DIR__ . '/includes/class-dynamic-content-tags.php',
+		'MC4WP_Easy_Digital_Downloads_Integration' => __DIR__ . '/integrations/easy-digital-downloads/class-easy-digital-downloads.php',
+		'MC4WP_Events_Manager_Integration' => __DIR__ . '/integrations/events-manager/class-events-manager.php',
+		'MC4WP_Field_Formatter' => __DIR__ . '/includes/class-field-formatter.php',
+		'MC4WP_Field_Guesser' => __DIR__ . '/includes/class-field-guesser.php',
+		'MC4WP_Form' => __DIR__ . '/includes/forms/class-form.php',
+		'MC4WP_Form_AMP' => __DIR__ . '/includes/forms/class-form-amp.php',
+		'MC4WP_Form_Asset_Manager' => __DIR__ . '/includes/forms/class-asset-manager.php',
+		'MC4WP_Form_Element' => __DIR__ . '/includes/forms/class-form-element.php',
+		'MC4WP_Form_Listener' => __DIR__ . '/includes/forms/class-form-listener.php',
+		'MC4WP_Form_Manager' => __DIR__ . '/includes/forms/class-form-manager.php',
+		'MC4WP_Form_Notice' => __DIR__ . '/includes/forms/class-form-message.php',
+		'MC4WP_Form_Output_Manager' => __DIR__ . '/includes/forms/class-output-manager.php',
+		'MC4WP_Form_Previewer' => __DIR__ . '/includes/forms/class-form-previewer.php',
+		'MC4WP_Form_Tags' => __DIR__ . '/includes/forms/class-form-tags.php',
+		'MC4WP_Form_Widget' => __DIR__ . '/includes/forms/class-widget.php',
+		'MC4WP_Forms_Admin' => __DIR__ . '/includes/forms/class-admin.php',
+		'MC4WP_Give_Integration' => __DIR__ . '/integrations/give/class-give.php',
+		'MC4WP_Gravity_Forms_Field' => __DIR__ . '/integrations/gravity-forms/class-field.php',
+		'MC4WP_Gravity_Forms_Integration' => __DIR__ . '/integrations/gravity-forms/class-gravity-forms.php',
+		'MC4WP_Integration' => __DIR__ . '/includes/integrations/class-integration.php',
+		'MC4WP_Integration_Admin' => __DIR__ . '/includes/integrations/class-admin.php',
+		'MC4WP_Integration_Fixture' => __DIR__ . '/includes/integrations/class-integration-fixture.php',
+		'MC4WP_Integration_Manager' => __DIR__ . '/includes/integrations/class-integration-manager.php',
+		'MC4WP_Integration_Tags' => __DIR__ . '/includes/integrations/class-integration-tags.php',
+		'MC4WP_List_Data_Mapper' => __DIR__ . '/includes/class-list-data-mapper.php',
+		'MC4WP_MailChimp' => __DIR__ . '/includes/class-mailchimp.php',
+		'MC4WP_MailChimp_Subscriber' => __DIR__ . '/includes/class-mailchimp-subscriber.php',
+		'MC4WP_MemberPress_Integration' => __DIR__ . '/integrations/memberpress/class-memberpress.php',
+		'MC4WP_Ninja_Forms_Action' => __DIR__ . '/integrations/ninja-forms/class-action.php',
+		'MC4WP_Ninja_Forms_Field' => __DIR__ . '/integrations/ninja-forms/class-field.php',
+		'MC4WP_Ninja_Forms_Integration' => __DIR__ . '/integrations/ninja-forms/class-ninja-forms.php',
+		'MC4WP_Ninja_Forms_V2_Integration' => __DIR__ . '/integrations/ninja-forms-2/class-ninja-forms.php',
+		'MC4WP_Plugin' => __DIR__ . '/includes/class-plugin.php',
+		'MC4WP_Queue' => __DIR__ . '/includes/class-queue.php',
+		'MC4WP_Queue_Job' => __DIR__ . '/includes/class-queue-job.php',
+		'MC4WP_Registration_Form_Integration' => __DIR__ . '/integrations/wp-registration-form/class-registration-form.php',
+		'MC4WP_Tools' => __DIR__ . '/includes/class-tools.php',
+		'MC4WP_Upgrade_Routines' => __DIR__ . '/includes/admin/class-upgrade-routines.php',
+		'MC4WP_User_Integration' => __DIR__ . '/includes/integrations/class-user-integration.php',
+		'MC4WP_WPForms_Field' => __DIR__ . '/integrations/wpforms/class-field.php',
+		'MC4WP_WPForms_Integration' => __DIR__ . '/integrations/wpforms/class-wpforms.php',
+		'MC4WP_WooCommerce_Integration' => __DIR__ . '/integrations/woocommerce/class-woocommerce.php',
+	);
+
+	if (isset($classmap[$class])) {
+		require $classmap[$class];
+	}
+});

+<?php
+
+$email_label       = esc_html__('Email address', 'mailchimp-for-wp');
+$email_placeholder_attr = esc_attr__('Your email address', 'mailchimp-for-wp');
+$signup_button_value     = esc_attr__('Sign up', 'mailchimp-for-wp');
+
+$content  = "<p>\n\t<label for=\"email\">{$email_label}: \n";
+$content .= "\t\t<input type=\"email\" id=\"email\" name=\"EMAIL\" placeholder=\"{$email_placeholder_attr}\" required>\n</label>\n</p>\n\n";
+$content .= "<p>\n\t<input type=\"submit\" value=\"{$signup_button_value}\">\n</p>";
+
+return $content;

+<?php
+
+return array(
+    'subscribed'             => array(
+        'type' => 'success',
+        'text' => esc_html__('Thank you, your sign-up request was successful! Please check your email inbox to confirm.', 'mailchimp-for-wp'),
+    ),
+    'updated'                => array(
+        'type' => 'success',
+        'text' => esc_html__('Thank you, your records have been updated!', 'mailchimp-for-wp'),
+    ),
+    'unsubscribed'           => array(
+        'type' => 'success',
+        'text' => esc_html__('You were successfully unsubscribed.', 'mailchimp-for-wp'),
+    ),
+    'not_subscribed'         => array(
+        'type' => 'notice',
+        'text' => esc_html__('Given email address is not subscribed.', 'mailchimp-for-wp'),
+    ),
+    'error'                  => array(
+        'type' => 'error',
+        'text' => esc_html__('Oops. Something went wrong. Please try again later.', 'mailchimp-for-wp'),
+    ),
+    'invalid_email'          => array(
+        'type' => 'error',
+        'text' => esc_html__('Please provide a valid email address.', 'mailchimp-for-wp'),
+    ),
+    'already_subscribed'     => array(
+        'type' => 'notice',
+        'text' => esc_html__('Given email address is already subscribed, thank you!', 'mailchimp-for-wp'),
+    ),
+    'required_field_missing' => array(
+        'type' => 'error',
+        'text' => esc_html__('Please fill in the required fields.', 'mailchimp-for-wp'),
+    ),
+    'no_lists_selected'      => array(
+        'type' => 'error',
+        'text' => esc_html__('Please select at least one list.', 'mailchimp-for-wp'),
+    ),
+);

+<?php
+
+return array(
+    'css'                => 0,
+    'double_optin'       => 1,
+    'hide_after_success' => 0,
+    'lists'              => array(),
+    'redirect'           => '',
+    'replace_interests'  => 1,
+    'required_fields'    => '',
+    'update_existing'    => 0,
+    'subscriber_tags'    => '',
+);

+<?php
+
+return array(
+    'api_key'              => '',
+    'allow_usage_tracking' => 0,
+    'debug_log_level'      => 'warning',
+);

+<?php
+
+class MC4WP_Admin_Ajax
+{
+    /**
+     * @var MC4WP_Admin_Tools
+     */
+    protected $tools;
+
+    /**
+     * MC4WP_Admin_Ajax constructor.
+     *
+     * @param MC4WP_Admin_Tools $tools
+     */
+    public function __construct(MC4WP_Admin_Tools $tools)
+    {
+        $this->tools = $tools;
+    }
+
+    /**
+     * Hook AJAX actions
+     */
+    public function add_hooks()
+    {
+        add_action('wp_ajax_mc4wp_renew_mailchimp_lists', array( $this, 'refresh_mailchimp_lists' ));
+        add_action('wp_ajax_mc4wp_get_list_details', array( $this, 'get_list_details' ));
+    }
+
+    /**
+     * Empty lists cache & fetch lists again.
+     */
+    public function refresh_mailchimp_lists()
+    {
+        if (! $this->tools->is_user_authorized()) {
+            wp_send_json_error();
+            return;
+        }
+
+        check_ajax_referer('mc4wp-ajax');
+
+        $mailchimp = new MC4WP_MailChimp();
+        $success   = $mailchimp->refresh_lists();
+        wp_send_json($success);
+    }
+
+    /**
+     * Retrieve details (merge fields and interest categories) for one or multiple lists in Mailchimp
+     * @throws MC4WP_API_Exception
+     */
+    public function get_list_details()
+    {
+        if (! $this->tools->is_user_authorized()) {
+            wp_send_json_error();
+            return;
+        }
+
+        $list_ids  = (array) explode(',', $_GET['ids']);
+        $data      = array();
+        $mailchimp = new MC4WP_MailChimp();
+        foreach ($list_ids as $list_id) {
+            $data[] = (object) array(
+                'id'                  => $list_id,
+                'merge_fields'        => $mailchimp->get_list_merge_fields($list_id),
+                'interest_categories' => $mailchimp->get_list_interest_categories($list_id),
+                'marketing_permissions' => $mailchimp->get_list_marketing_permissions($list_id),
+            );
+        }
+
+        if (isset($_GET['format']) && $_GET['format'] === 'html') {
+            $merge_fields          = $data[0]->merge_fields;
+            $interest_categories   = $data[0]->interest_categories;
+            $marketing_permissions = $data[0]->marketing_permissions;
+            require MC4WP_PLUGIN_DIR . '/includes/views/parts/lists-overview-details.php';
+        } else {
+            wp_send_json($data);
+        }
+        exit;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Admin_Messages
+ *
+ * @ignore
+ * @since 3.0
+ */
+class MC4WP_Admin_Messages
+{
+    /**
+     * @var array
+     */
+    protected $bag;
+
+    /**
+     * @var bool
+     */
+    protected $dirty = false;
+
+    /**
+     * Add hooks
+     */
+    public function add_hooks()
+    {
+        add_action('admin_notices', array( $this, 'show' ));
+        register_shutdown_function(array( $this, 'save' ));
+    }
+
+    private function load()
+    {
+        if (is_null($this->bag)) {
+            $this->bag = get_option('mc4wp_flash_messages', array());
+        }
+    }
+
+    // empty flash bag
+    private function reset()
+    {
+        $this->bag   = array();
+        $this->dirty = true;
+    }
+
+    /**
+     * Flash a message (shows on next pageload)
+     *
+     * @param        $message
+     * @param string $type
+     */
+    public function flash($message, $type = 'success')
+    {
+        $this->load();
+        $this->bag[] = array(
+            'text' => $message,
+            'type' => $type,
+        );
+        $this->dirty = true;
+    }
+
+
+
+    /**
+     * Show queued flash messages
+     */
+    public function show()
+    {
+        $this->load();
+
+        foreach ($this->bag as $message) {
+            echo sprintf('<div class="notice notice-%s is-dismissible"><p>%s</p></div>', $message['type'], $message['text']);
+        }
+
+        $this->reset();
+    }
+
+    /**
+     * Save queued messages
+     *
+     * @hooked `shutdown`
+     */
+    public function save()
+    {
+        if ($this->dirty) {
+            update_option('mc4wp_flash_messages', $this->bag, false);
+        }
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Admin_Texts
+ *
+ * @ignore
+ * @since 3.0
+ */
+class MC4WP_Admin_Texts
+{
+    /**
+     * @var string
+     */
+    protected $plugin_file;
+
+    /**
+     * @param string $plugin_file
+     */
+    public function __construct($plugin_file)
+    {
+        $this->plugin_file = $plugin_file;
+    }
+
+    /**
+     * Add hooks
+     */
+    public function add_hooks()
+    {
+        global $pagenow;
+
+        add_filter('admin_footer_text', array( $this, 'footer_text' ));
+
+        // Hooks for Plugins overview page
+        if ($pagenow === 'plugins.php') {
+            add_filter('plugin_action_links_' . $this->plugin_file, array( $this, 'add_plugin_settings_link' ), 10, 2);
+            add_filter('plugin_row_meta', array( $this, 'add_plugin_meta_links' ), 10, 2);
+        }
+    }
+
+    /**
+     * Ask for a plugin review in the WP Admin footer, if this is one of the plugin pages.
+     *
+     * @param string $text
+     *
+     * @return string
+     */
+    public function footer_text($text)
+    {
+        if (! empty($_GET['page']) && strpos($_GET['page'], 'mailchimp-for-wp') === 0) {
+            $text = sprintf('If you enjoy using <strong>Mailchimp for WordPress</strong>, please <a href="%s" target="_blank">leave us a ★★★★★ plugin review on WordPress.org</a>.', 'https://wordpress.org/support/plugin/mailchimp-for-wp/reviews/#new-post');
+        }
+
+        return $text;
+    }
+
+    /**
+     * Add the settings link to the Plugins overview
+     *
+     * @param array $links
+     * @param       $file
+     *
+     * @return array
+     */
+    public function add_plugin_settings_link($links, $file)
+    {
+        if ($file !== $this->plugin_file) {
+            return $links;
+        }
+
+        $settings_link = sprintf('<a href="%s">%s</a>', admin_url('admin.php?page=mailchimp-for-wp'), esc_html__('Settings', 'mailchimp-for-wp'));
+        array_unshift($links, $settings_link);
+        return $links;
+    }
+
+    /**
+     * Adds meta links to the plugin in the WP Admin > Plugins screen
+     *
+     * @param array $links
+     * @param string $file
+     *
+     * @return array
+     */
+    public function add_plugin_meta_links($links, $file)
+    {
+        if ($file !== $this->plugin_file) {
+            return $links;
+        }
+
+        $links[] = '<a href="https://www.mc4wp.com/kb/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=plugins-page">' . esc_html__('Documentation', 'mailchimp-for-wp') . '</a>';
+
+        /**
+         * Filters meta links shown on the Plugins overview page
+         *
+         * This takes an array of strings
+         *
+         * @since 3.0
+         * @param array $links
+         * @ignore
+         */
+        $links = apply_filters('mc4wp_admin_plugin_meta_links', $links);
+
+        return $links;
+    }
+}

+<?php
+
+class MC4WP_Admin_Tools
+{
+    /**
+     * @return string
+     */
+    public function get_plugin_page()
+    {
+        if (empty($_GET['page'])) {
+            return '';
+        }
+
+        $prefix = 'mailchimp-for-wp';
+        $page   = ltrim(substr($_GET['page'], strlen($prefix)), '-');
+        return $page;
+    }
+
+    /**
+     * @param string $page
+     *
+     * @return bool
+     */
+    public function on_plugin_page($page = null)
+    {
+        // any settings page
+        if (is_null($page)) {
+            return isset($_GET['page']) && strpos($_GET['page'], 'mailchimp-for-wp') === 0;
+        }
+
+        // specific page
+        return $this->get_plugin_page() === $page;
+    }
+
+    /**
+     * Does the logged-in user have the required capability?
+     *
+     * @return bool
+     */
+    public function is_user_authorized()
+    {
+        return current_user_can($this->get_required_capability());
+    }
+
+    /**
+     * Get required capability to access settings page and view dashboard widgets.
+     *
+     * @return string
+     */
+    public function get_required_capability()
+    {
+        $capability = 'manage_options';
+
+        /**
+         * Filters the required user capability to access the Mailchimp for WordPress' settings pages, view the dashboard widgets.
+         *
+         * Defaults to `manage_options`
+         *
+         * @since 3.0
+         * @param string $capability
+         * @see https://codex.wordpress.org/Roles_and_Capabilities
+         */
+        $capability = (string) apply_filters('mc4wp_admin_required_capability', $capability);
+
+        return $capability;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Admin_Ads
+ *
+ * @ignore
+ * @access private
+ */
+class MC4WP_Admin_Ads
+{
+    /**
+     * @return bool Adds hooks
+     */
+    public function add_hooks()
+    {
+
+        // don't hook if Premium is activated
+        if (defined('MC4WP_PREMIUM_VERSION')) {
+            return false;
+        }
+
+        add_filter('mc4wp_admin_plugin_meta_links', array( $this, 'plugin_meta_links' ));
+        add_action('mc4wp_admin_form_after_behaviour_settings_rows', array( $this, 'after_form_settings_rows' ));
+        add_action('mc4wp_admin_form_after_appearance_settings_rows', array( $this, 'after_form_appearance_settings_rows' ));
+        add_action('mc4wp_admin_sidebar', array( $this, 'admin_sidebar' ));
+        add_action('mc4wp_admin_footer', array( $this, 'admin_footer' ));
+        add_action('mc4wp_admin_other_settings', array( $this, 'ecommerce' ), 90);
+
+        add_filter('mc4wp_admin_menu_items', array( $this, 'add_menu_item' ));
+
+        add_action('mc4wp_admin_after_woocommerce_integration_settings', array( $this, 'ecommerce' ));
+        return true;
+    }
+
+    public function add_menu_item($items)
+    {
+        $items['extensions'] = array(
+            'title'    => __('Add-ons', 'mailchimp-for-wp'),
+            'text'     => __('Add-ons', 'mailchimp-for-wp'),
+            'slug'     => 'extensions',
+            'callback' => array( $this, 'show_extensions_page' ),
+            'position' => 100,
+        );
+
+        return $items;
+    }
+
+    /**
+     * Add text row to "Form > Appearance" tab.
+     */
+    public function after_form_appearance_settings_rows()
+    {
+        echo '<tr>';
+        echo '<td colspan="2">';
+        echo '<p class="description">';
+        echo sprintf(__('Want to customize the style of your form? <a href="%s">Try our Styles Builder</a> & edit the look of your forms with just a few clicks.', 'mailchimp-for-wp'), 'https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=form-settings-link');
+        echo '</p>';
+        echo '</td>';
+        echo '</tr>';
+    }
+
+    /**
+     * Add text row to "Form > Settings" tab.
+     */
+    public function after_form_settings_rows()
+    {
+        echo '<tr>';
+        echo '<td colspan="2">';
+        echo '<p class="description">';
+
+        if (rand(1, 2) === 1) {
+            echo sprintf(__('Be notified whenever someone subscribes? <a href="%s">Mailchimp for WordPress Premium</a> allows you to set up email notifications for your forms.', 'mailchimp-for-wp'), 'https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=footer-link');
+        } else {
+            echo sprintf(__('Increased conversions? <a href="%s">Mailchimp for WordPress Premium</a> submits forms without reloading the entire page, resulting in a much better experience for your visitors.', 'mailchimp-for-wp'), 'https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=form-settings-link');
+        }
+
+        echo '</p>';
+        echo '</td>';
+        echo '</tr>';
+    }
+
+    /**
+     * @param array $links
+     *
+     * @return array
+     */
+    public function plugin_meta_links($links)
+    {
+        $links[] = '<a href="https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=plugins-upgrade-link">' . __('Upgrade to Premium', 'mailchimp-for-wp') . '</a>';
+        return $links;
+    }
+
+    /**
+     * Add several texts to admin footer.
+     */
+    public function admin_footer()
+    {
+        if (isset($_GET['view']) && $_GET['view'] === 'edit-form') {
+            // WPML & Polylang specific message
+            if (defined('ICL_LANGUAGE_CODE')) {
+                echo '<p class="description">' . sprintf(__('Do you want translated forms for all of your languages? <a href="%s">Try Mailchimp for WordPress Premium</a>, which does just that plus more.', 'mailchimp-for-wp'), 'https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=footer-link') . '</p>';
+                return;
+            }
+
+            // General "edit form" message
+            echo '<p class="description">' . sprintf(__('Do you want to create more than one form? Our Premium add-on does just that! <a href="%s">Have a look at all Premium benefits</a>.', 'mailchimp-for-wp'), 'https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=footer-link') . '</p>';
+            return;
+        }
+
+        // General message
+        echo '<p class="description">' . sprintf(__('Are you enjoying this plugin? The Premium add-on unlocks several powerful features. <a href="%s">Find out about all benefits now</a>.', 'mailchimp-for-wp'), 'https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=footer-link') . '</p>';
+    }
+
+    /**
+     * Add email opt-in form to sidebar
+     */
+    public function admin_sidebar()
+    {
+        echo '<style>.mc4wp-premium-box {
+  background: #fff8c5;
+  border: 1px solid #d4a72c66;
+  padding: 1em;
+}</style>';
+        echo '<div class="mc4wp-box">';
+        echo '<div class="mc4wp-premium-box">';
+        echo '<h3>Mailchimp for WordPress Premium</h3>';
+        echo '<p>';
+        echo 'You are currently using the free version of Mailchimp for WordPress. ';
+        echo '</p>';
+        echo '<p>';
+        echo 'There is a Premium version of this plugin that adds several powerful features. Like multiple and improved sign-up forms, an easier way to visually enhance those forms, advanced e-commerce integration and keeping track of all sign-up attempts in your local WordPress database.';
+        echo '</p>';
+        echo '<p>You can have all those benefits for a small yearly fee. <a href="https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=upgrade-box">Take a look at Mailchimp for WordPress Premium here</a>.</p>';
+        echo '</div>';
+        echo '</div>';
+    }
+
+    /**
+     * Show notice about E-Commerce integration in Premium.
+     */
+    public function ecommerce()
+    {
+        // detect whether WooCommerce is installed & activated.
+        if (! class_exists('WooCommerce')) {
+            return;
+        }
+
+        echo '<div class="mc4wp-margin-m">';
+        echo '<h3>Advanced WooCommerce integration for Mailchimp</h3>';
+        echo '<p>';
+        echo __('Do you want to track all WooCommerce orders in Mailchimp so you can send emails based on the purchase activity of your subscribers?', 'mailchimp-for-wp');
+        echo '</p>';
+        echo '<p>';
+        echo sprintf(__('<a href="%1$s">Upgrade to Mailchimp for WordPress Premium</a> or <a href="%2$s">read more about Mailchimp\'s E-Commerce features</a>.', 'mailchimp-for-wp') . '</p>', 'https://www.mc4wp.com/premium-features/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=other-settings-link', 'https://www.mc4wp.com/kb/what-is-ecommerce360/#utm_source=wp-plugin&utm_medium=mailchimp-for-wp&utm_campaign=other-settings-link');
+        echo '</p>';
+        echo '</div>';
+    }
+
+    public function show_extensions_page()
+    {
+        require MC4WP_PLUGIN_DIR . '/includes/views/extensions.php';
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Admin_Review_Notice
+ *
+ * @ignore
+ */
+class MC4WP_Admin_Review_Notice
+{
+    /**
+     * @var MC4WP_Admin_Tools
+     */
+    protected $tools;
+
+    /**
+     * @var string
+     */
+    protected $meta_key_dismissed = '_mc4wp_review_notice_dismissed';
+
+    /**
+     * MC4WP_Admin_Review_Notice constructor.
+     *
+     * @param MC4WP_Admin_Tools $tools
+     */
+    public function __construct(MC4WP_Admin_Tools $tools)
+    {
+        $this->tools = $tools;
+    }
+
+    /**
+     * Add action & filter hooks.
+     */
+    public function add_hooks()
+    {
+        add_action('admin_notices', array( $this, 'show' ));
+        add_action('mc4wp_admin_dismiss_review_notice', array( $this, 'dismiss' ));
+    }
+
+    /**
+     * Set flag in user meta so notice won't be shown.
+     */
+    public function dismiss()
+    {
+        $user = wp_get_current_user();
+        update_user_meta($user->ID, $this->meta_key_dismissed, 1);
+    }
+
+    /**
+     * @return bool
+     */
+    public function show()
+    {
+        // only show on Mailchimp for WordPress' pages.
+        if (! $this->tools->on_plugin_page()) {
+            return false;
+        }
+
+        // only show if 2 weeks have passed since first use.
+        $two_weeks_in_seconds = ( 60 * 60 * 24 * 14 );
+        if ($this->time_since_first_use() <= $two_weeks_in_seconds) {
+            return false;
+        }
+
+        // only show if user did not dismiss before
+        $user = wp_get_current_user();
+        if (get_user_meta($user->ID, $this->meta_key_dismissed, true)) {
+            return false;
+        }
+
+        echo '<div class="notice notice-info mc4wp-is-dismissible" id="mc4wp-review-notice">';
+        echo '<p>';
+        echo esc_html__('You\'ve been using Mailchimp for WordPress for some time now; we hope you love it!', 'mailchimp-for-wp'), ' <br />';
+        echo sprintf(wp_kses(__('If you do, please <a href="%s">leave us a 5★ rating on WordPress.org</a>. It would be of great help to us.', 'mailchimp-for-wp'), array( 'a' => array( 'href' => array() ) )), 'https://wordpress.org/support/view/plugin-reviews/mailchimp-for-wp?rate=5#new-post');
+        echo '</p>';
+        echo '<form method="POST" id="mc4wp-dismiss-review-form"><button type="submit" class="notice-dismiss"><span class="screen-reader-text">', esc_html__('Dismiss this notice.', 'mailchimp-for-wp'), '</span></button><input type="hidden" name="_mc4wp_action" value="dismiss_review_notice" />', wp_nonce_field('_mc4wp_action', '_wpnonce', true, false), '</form>';
+        echo '</div>';
+        return true;
+    }
+
+    /**
+     * @return int
+     */
+    private function time_since_first_use()
+    {
+        $options = get_option('mc4wp', array());
+        if (! is_array($options)) {
+            $options = array();
+        }
+
+        // option was never added before, do it now.
+        if (empty($options['first_activated_on'])) {
+            $options['first_activated_on'] = time();
+            update_option('mc4wp', $options);
+        }
+
+        return time() - $options['first_activated_on'];
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_DB_Upgrader
+ *
+ * This class takes care of loading migration files from the specified migrations directory.
+ * Migration files should only use default WP functions and NOT use code which might not be there in the future.
+ *
+ * @ignore
+ */
+class MC4WP_Upgrade_Routines
+{
+    /**
+     * @var float
+     */
+    protected $version_from = 0;
+
+    /**
+     * @var float
+     */
+    protected $version_to = 0;
+
+    /**
+     * @var string
+     */
+    protected $migrations_dir = '';
+
+    /**
+     * @param float $from
+     * @param float $to
+     */
+    public function __construct($from, $to, $migrations_dir)
+    {
+        $this->version_from   = $from;
+        $this->version_to     = $to;
+        $this->migrations_dir = $migrations_dir;
+    }
+
+    /**
+     * Run the various upgrade routines, all the way up to the latest version
+     */
+    public function run()
+    {
+        $migrations = $this->find_migrations();
+
+        // run in sub-function for scope
+        array_map(array( $this, 'run_migration' ), $migrations);
+    }
+
+    /**
+     * @return array
+     */
+    public function find_migrations()
+    {
+        $files      = glob(rtrim($this->migrations_dir, '/') . '/*.php');
+        $migrations = array();
+
+        // return empty array when glob returns non-array value.
+        if (! is_array($files)) {
+            return $migrations;
+        }
+
+        foreach ($files as $file) {
+            $migration = basename($file);
+            $parts     = explode('-', $migration);
+            $version   = $parts[0];
+
+            if (version_compare($this->version_from, $version, '<')) {
+                $migrations[] = $file;
+            }
+        }
+
+        return $migrations;
+    }
+
+    /**
+     * Include a migration file and runs it.
+     *
+     * @param string $file
+     */
+    protected function run_migration($file)
+    {
+        include $file;
+    }
+}

+<?php
+
+defined('ABSPATH') or exit;
+
+// get options
+$form_options = get_option('mc4wp_lite_form', array());
+
+// bail if there are no previous options
+if (empty($form_options)) {
+    return;
+}
+
+// bail if there are Pro forms already
+$has_forms = get_posts(
+    array(
+        'post_type'   => 'mc4wp-form',
+        'post_status' => 'publish',
+        'numberposts' => 1,
+    )
+);
+
+// There are forms already, don't continue.
+if (! empty($has_forms)) {
+    // delete option as it apparently exists.
+    delete_option('mc4wp_lite_form');
+    return;
+}
+
+// create post type for form
+$id = wp_insert_post(
+    array(
+        'post_type'    => 'mc4wp-form',
+        'post_status'  => 'publish',
+        'post_title'   => __('Default sign-up form', 'mailchimp-for-wp'),
+        'post_content' => ( empty($form_options['markup']) ) ? '' : $form_options['markup'],
+    )
+);
+
+// set default_form_id
+update_option('mc4wp_default_form_id', $id);
+
+// set form settings
+$setting_keys = array(
+    'css',
+    'custom_theme_color',
+    'double_optin',
+    'update_existing',
+    'replace_interests',
+    'send_welcome',
+    'redirect',
+    'hide_after_success',
+);
+
+$settings = array();
+
+foreach ($setting_keys as $setting_key) {
+    // use isset to account for "0" settings
+    if (isset($form_options[ $setting_key ])) {
+        $settings[ $setting_key ] = $form_options[ $setting_key ];
+    }
+}
+
+// get only keys of lists setting
+if (isset($form_options['lists'])) {
+    $settings['lists'] = array_keys($form_options['lists']);
+}
+
+update_post_meta($id, '_mc4wp_settings', $settings);
+
+// set form message texts
+$message_keys = array(
+    'text_subscribed',
+    'text_error',
+    'text_invalid_email',
+    'text_already_subscribed',
+    'text_required_field_missing',
+    'text_unsubscribed',
+    'text_not_subscribed',
+);
+
+foreach ($message_keys as $message_key) {
+    if (! empty($form_options[ $message_key ])) {
+        update_post_meta($id, $message_key, $form_options[ $message_key ]);
+    }
+}
+
+// delete old option
+delete_option('mc4wp_lite_form');

+<?php
+
+defined('ABSPATH') or exit;
+
+$global_options = (array) get_option('mc4wp_form', array());
+
+// find all form posts
+$posts = get_posts(
+    array(
+        'post_type'   => 'mc4wp-form',
+        'post_status' => 'publish',
+        'numberposts' => -1,
+    )
+);
+
+$css_map = array(
+    'default'      => 'basic',
+    'custom'       => 'styles-builder',
+    'light'        => 'theme-light',
+    'dark'         => 'theme-dark',
+    'red'          => 'theme-red',
+    'green'        => 'theme-green',
+    'blue'         => 'theme-blue',
+    'custom-color' => 'theme-custom-color',
+);
+
+$stylesheets = array();
+
+foreach ($posts as $post) {
+    // get form options from post meta directly
+    $options = (array) get_post_meta($post->ID, '_mc4wp_settings', true);
+
+    // store all global options in scoped form settings
+    // do this BEFORE changing css key, so we take that as well.
+    foreach ($global_options as $key => $value) {
+        if (strlen($value) > 0 && ( ! isset($options[ $key ]) || strlen($options[ $key ]) == 0 )) {
+            $options[ $key ] = $value;
+        }
+    }
+
+    // update "css" option value
+    if (isset($options['css']) && isset($css_map[ $options['css'] ])) {
+        $options['css'] = $css_map[ $options['css'] ];
+    }
+
+    // create stylesheets option
+    if (! empty($options['css'])) {
+        $stylesheet = $options['css'];
+        if (strpos($stylesheet, 'theme-') === 0) {
+            $stylesheet = 'themes';
+        }
+
+        if (! in_array($stylesheet, $stylesheets)) {
+            $stylesheets[] = $stylesheet;
+        }
+    }
+
+    update_post_meta($post->ID, '_mc4wp_settings', $options);
+}
+
+// update stylesheets option
+update_option('mc4wp_form_stylesheets', $stylesheets);
+
+// delete old options
+delete_option('mc4wp_form');

+<?php
+
+defined('ABSPATH') or exit;
+
+// find all form posts
+$posts = get_posts(
+    array(
+        'post_type'   => 'mc4wp-form',
+        'post_status' => 'publish',
+        'numberposts' => -1,
+    )
+);
+
+// set form message texts
+$message_keys = array(
+    'text_subscribed',
+    'text_error',
+    'text_invalid_email',
+    'text_already_subscribed',
+    'text_required_field_missing',
+    'text_unsubscribed',
+    'text_not_subscribed',
+);
+
+foreach ($posts as $post) {
+    $settings = get_post_meta($post->ID, '_mc4wp_settings', true);
+
+    foreach ($message_keys as $key) {
+        if (empty($settings[ $key ])) {
+            continue;
+        }
+
+        $message = $settings[ $key ];
+
+        // move message setting over to post meta
+        update_post_meta($post->ID, $key, $message);
+        unset($settings[ $key ]);
+    }
+
+    // update post meta with unset message keys
+    update_post_meta($post->ID, '_mc4wp_settings', $settings);
+}

+<?php
+
+defined('ABSPATH') or exit;
+
+// transfer option
+$options = (array) get_option('mc4wp_lite', array());
+
+// merge options, with Pro options taking precedence
+$pro_options = (array) get_option('mc4wp', array());
+$options     = array_merge($options, $pro_options);
+
+// update options
+update_option('mc4wp', $options);
+
+// delete old option
+delete_option('mc4wp_lite');

+<?php
+
+defined('ABSPATH') or exit;
+
+$old_options = get_option('mc4wp_lite_checkbox', array());
+$pro_options = get_option('mc4wp_checkbox', array());
+if (! empty($pro_options)) {
+    $old_options = array_merge($old_options, $pro_options);
+}
+
+// do we have to do something?
+if (empty($old_options)) {
+    return;
+}
+
+// find activated integrations (show_at_xxx options)
+$new_options = array();
+$map         = array(
+    'comment_form'         => 'wp-comment-form',
+    'registration_form'    => 'wp-registration-form',
+    'buddypress_form'      => 'buddypress',
+    'bbpres_forms'         => 'bbpress',
+    'woocommerce_checkout' => 'woocommerce',
+    'edd_checkout'         => 'easy-digital-downloads',
+);
+
+$option_keys = array(
+    'label',
+    'precheck',
+    'css',
+    'lists',
+    'double_optin',
+    'update_existing',
+    'replace_interests',
+    'send_welcome',
+);
+
+foreach ($map as $old_integration_slug => $new_integration_slug) {
+    // check if integration is enabled using its old slug
+    $show_key = sprintf('show_at_%s', $old_integration_slug);
+    if (empty($old_options[ $show_key ])) {
+        continue;
+    }
+
+    $options = array(
+        'enabled' => 1,
+    );
+
+    foreach ($option_keys as $option_key) {
+        if (isset($old_options[ $option_key ])) {
+            $options[ $option_key ] = $old_options[ $option_key ];
+        }
+    }
+
+    // add to new options
+    $new_options[ $new_integration_slug ] = $options;
+}
+
+// save new settings
+update_option('mc4wp_integrations', $new_options);
+
+// delete old options
+delete_option('mc4wp_lite_checkbox');
+delete_option('mc4wp_checkbox');

+<?php
+
+defined('ABSPATH') or exit;
+
+// move stylebuilders file to bundle
+$file = (string) get_option('mc4wp_custom_css_file', '');
+if (empty($file)) {
+    return;
+}
+
+$uploads = wp_upload_dir();
+
+// figure out absolute file path
+$prefix        = str_replace('http:', '', $uploads['baseurl']);
+$relative_path = str_replace($prefix, '', $file);
+
+// get part before ?
+if (strpos($relative_path, '?') !== false) {
+    $parts         = explode('?', $relative_path);
+    $relative_path = array_shift($parts);
+}
+
+// This is the absolute path to the file, he he..
+$file = $uploads['basedir'] . $relative_path;
+
+if (file_exists($file)) {
+    // create directory, if necessary
+    $dir = $uploads['basedir'] . '/mc4wp-stylesheets';
+    if (! file_exists($dir)) {
+        @mkdir($dir, 0755);
+    }
+
+    @chmod($dir, 0755);
+
+    // Move file to new location
+    $new_file = $dir . '/bundle.css';
+    $success  = rename($file, $new_file);
+}
+
+// remove old option
+delete_option('mc4wp_custom_css_file');

+<?php
+
+defined('ABSPATH') or exit;
+
+$section_widgets = get_option('sidebars_widgets', array());
+$replaced        = false;
+
+foreach ($section_widgets as $section => $widgets) {
+    // WP has an "array_version" key that is not an array...
+    if (! is_array($widgets)) {
+        continue;
+    }
+
+    // loop through widget ID's
+    foreach ($widgets as $key => $widget_id) {
+        // does this widget ID start with "mc4wp_widget"?
+        if (strpos($widget_id, 'mc4wp_widget') === 0) {
+            // replace "mc4wp_widget" with "mc4wp_form_widget"
+            $new_widget_id                       = str_replace('mc4wp_widget', 'mc4wp_form_widget', $widget_id);
+            $section_widgets[ $section ][ $key ] = $new_widget_id;
+            $replaced                            = true;
+        }
+    }
+}
+
+
+// update option if we made changes
+if ($replaced) {
+    update_option('sidebars_widgets', $section_widgets);
+}
+
+// update widget options
+$options = get_option('widget_mc4wp_widget', false);
+if ($options) {
+    update_option('widget_mc4wp_form_widget', $options);
+
+    // delete old option
+    delete_option('widget_mc4wp_widget');
+}

+<?php
+
+defined('ABSPATH') or exit;
+
+$options = get_option('mc4wp_integrations', array());
+
+if (! empty($options['woocommerce']) && ! empty($options['woocommerce']['position'])) {
+    $options['woocommerce']['position'] = sprintf('checkout_%s', $options['woocommerce']['position']);
+}
+
+update_option('mc4wp_integrations', $options);

+<?php
+
+defined('ABSPATH') or exit;
+
+/**
+ * @ignore
+ * @return object
+ */
+function _mc4wp_400_find_grouping_for_interest_category($groupings, $interest_category)
+{
+    foreach ($groupings as $grouping) {
+        // cast to stdClass because of missing class
+        $grouping = (object) (array) $grouping;
+
+        if ($grouping->name === $interest_category->title) {
+            return $grouping;
+        }
+    }
+
+    return null;
+}
+
+/**
+ * @ignore
+ * @return object
+ */
+function _mc4wp_400_find_group_for_interest($groups, $interest)
+{
+    foreach ($groups as $group_id => $group_name) {
+        if ($group_name === $interest->name) {
+            return (object) array(
+                'name' => $group_name,
+                'id'   => $group_id,
+            );
+        }
+    }
+
+    return null;
+}
+
+// in case the migration is _very_ late to the party
+if (! class_exists('MC4WP_API_V3')) {
+    return;
+}
+
+$options = get_option('mc4wp', array());
+if (empty($options['api_key'])) {
+    return;
+}
+
+// get current state from transient
+$lists = get_transient('mc4wp_mailchimp_lists_fallback');
+if (empty($lists)) {
+    return;
+}
+
+@set_time_limit(600);
+$api_v3 = new MC4WP_API_V3($options['api_key']);
+$map    = array();
+
+foreach ($lists as $list) {
+    // cast to stdClass because of missing classes
+    $list = (object) (array) $list;
+
+    // no groupings? easy!
+    if (empty($list->groupings)) {
+        continue;
+    }
+
+    // fetch (new) interest categories for this list
+    try {
+        $interest_categories = $api_v3->get_list_interest_categories($list->id);
+    } catch (MC4WP_API_Exception $e) {
+        continue;
+    }
+
+
+    foreach ($interest_categories as $interest_category) {
+        // compare interest title with grouping name, if it matches, get new id.
+        $grouping = _mc4wp_400_find_grouping_for_interest_category($list->groupings, $interest_category);
+        if (! $grouping) {
+            continue;
+        }
+
+        $groups = array();
+
+        try {
+            $interests = $api_v3->get_list_interest_category_interests($list->id, $interest_category->id);
+        } catch (MC4WP_API_Exception $e) {
+            continue;
+        }
+
+        foreach ($interests as $interest) {
+            $group = _mc4wp_400_find_group_for_interest($grouping->groups, $interest);
+
+            if ($group) {
+                $groups[ $group->id ]   = $interest->id;
+                $groups[ $group->name ] = $interest->id;
+            }
+        }
+
+        $map[ (string) $grouping->id ] = array(
+            'id'     => $interest_category->id,
+            'groups' => $groups,
+        );
+    }
+}
+
+
+if (! empty($map)) {
+    update_option('mc4wp_groupings_map', $map);
+}

+<?php
+
+defined('ABSPATH') or exit;
+
+/** @ignore */
+function _mc4wp_400_replace_comma_with_pipe($matches)
+{
+    $old = $matches[1];
+    $new = str_replace(',', '|', $old);
+    return str_replace($old, $new, $matches[0]);
+}
+
+// get all forms
+$posts = get_posts(
+    array(
+        'post_type'   => 'mc4wp-form',
+        'numberposts' => -1,
+    )
+);
+
+foreach ($posts as $post) {
+    // find hidden field values in form and pass through replace function
+    $old = $post->post_content;
+    $new = preg_replace_callback('/type="hidden" .* value="(.*)"/i', '_mc4wp_400_replace_comma_with_pipe', $old);
+
+    // update post if we replaced something
+    if ($new != $old) {
+        $post->post_content = $new;
+        wp_update_post($post);
+    }
+}

+<?php
+
+defined('ABSPATH') or exit;
+
+// get old log filename
+$upload_dir   = wp_upload_dir(null, false);
+$old_filename = trailingslashit($upload_dir['basedir']) . 'mc4wp-debug.log';
+$new_filename = trailingslashit($upload_dir['basedir']) . 'mc4wp-debug-log.php';
+
+// check if old default log file exists
+if (! file_exists($old_filename)) {
+    return;
+}
+
+// rename to new file.
+@rename($old_filename, $new_filename);
+
+// if success, insert php exit tag as first line
+if (file_exists($new_filename)) {
+    $handle = fopen($new_filename, 'r+');
+
+    if (is_resource($handle)) {
+        // make sure first line of log file is a PHP tag + exit statement (to prevent direct file access)
+        $line            = fgets($handle);
+        $php_exit_string = '<?php exit; ?>';
+        if (strpos($line, $php_exit_string) !== 0) {
+            rewind($handle);
+            fwrite($handle, $php_exit_string . PHP_EOL . $line);
+        }
+
+        fclose($handle);
+    }
+}

+<?php
+
+defined('ABSPATH') or exit;
+
+if (function_exists('mc4wp_refresh_mailchimp_lists')) {
+    mc4wp_refresh_mailchimp_lists();
+}
+
+delete_transient('mc4wp_mailchimp_lists_v3');
+delete_option('mc4wp_mailchimp_lists_v3_fallback');
+
+wp_schedule_event(strtotime('tomorrow 3 am'), 'daily', 'mc4wp_refresh_mailchimp_lists');

+<?php
+
+defined('ABSPATH') or exit;
+
+wp_clear_scheduled_hook('mc4wp_refresh_mailchimp_lists');
+
+$time_string = sprintf('tomorrow %d:%d%d am', rand(1, 6), rand(0, 5), rand(0, 9));
+wp_schedule_event(strtotime($time_string), 'daily', 'mc4wp_refresh_mailchimp_lists');

+<?php
+
+global $wpdb;
+$wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE 'mc4wp_mailchimp_list_%'");

+<?php
+
+defined('ABSPATH') or exit;
+
+// get old filename
+$upload_dir   = wp_upload_dir(null, false);
+$old_filename = trailingslashit($upload_dir['basedir']) . 'mc4wp-debug-log.php';
+
+// if old file exists, move it to new location
+if (is_file($old_filename)) {
+    $new_filename = $upload_dir['basedir'] . '/mailchimp-for-wp/debug-log.php';
+    $dir          = dirname($new_filename);
+    if (! is_dir($dir)) {
+        mkdir($dir, 0755, true);
+    }
+
+    rename($old_filename, $new_filename);
+}

+<?php
+
+class MC4WP_API_V3_Client
+{
+    /**
+    * @var string
+    */
+    private $api_key;
+
+    /**
+    * @var string
+    */
+    private $api_url = 'https://api.mailchimp.com/3.0/';
+
+    /**
+    * @var array
+    */
+    private $last_response;
+
+    /**
+    * @var array
+    */
+    private $last_request;
+
+    /**
+    * Constructor
+    *
+    * @param string $api_key
+    */
+    public function __construct($api_key)
+    {
+        $this->api_key = $api_key;
+
+        $dash_position = strpos($api_key, '-');
+        if ($dash_position !== false) {
+            $this->api_url = str_replace('//api.', '//' . substr($api_key, $dash_position + 1) . '.api.', $this->api_url);
+        }
+    }
+
+
+    /**
+    * @param string $resource
+    * @param array $args
+    *
+    * @return mixed
+    * @throws MC4WP_API_Exception
+    */
+    public function get($resource, array $args = array())
+    {
+        return $this->request('GET', $resource, $args);
+    }
+
+    /**
+    * @param string $resource
+    * @param array $data
+    *
+    * @return mixed
+    * @throws MC4WP_API_Exception
+    */
+    public function post($resource, array $data)
+    {
+        return $this->request('POST', $resource, $data);
+    }
+
+    /**
+    * @param string $resource
+    * @param array $data
+    * @return mixed
+    * @throws MC4WP_API_Exception
+    */
+    public function put($resource, array $data)
+    {
+        return $this->request('PUT', $resource, $data);
+    }
+
+    /**
+    * @param string $resource
+    * @param array $data
+    * @return mixed
+    * @throws MC4WP_API_Exception
+    */
+    public function patch($resource, array $data)
+    {
+        return $this->request('PATCH', $resource, $data);
+    }
+
+    /**
+    * @param string $resource
+    * @return mixed
+    * @throws MC4WP_API_Exception
+    */
+    public function delete($resource)
+    {
+        return $this->request('DELETE', $resource);
+    }
+
+    /**
+    * @param string $method
+    * @param string $resource
+    * @param array $data
+    *
+    * @return mixed
+    *
+    * @throws MC4WP_API_Exception
+    */
+    private function request($method, $resource, array $data = array())
+    {
+        $this->reset();
+
+        // don't bother if no API key was given.
+        if (empty($this->api_key)) {
+            throw new MC4WP_API_Exception('Missing API key', 001);
+        }
+
+        $method = strtoupper(trim($method));
+        $url    = $this->api_url . ltrim($resource, '/');
+        $args   = array(
+            'method'    => $method,
+            'headers'   => $this->get_headers(),
+            'timeout'   => 20,
+            'sslverify' => apply_filters('mc4wp_use_sslverify', true),
+        );
+
+        if (! empty($data)) {
+            if (in_array($method, array( 'GET', 'DELETE' ), true)) {
+                $url = add_query_arg($data, $url);
+            } else {
+                $args['headers']['Content-Type'] = 'application/json';
+                $args['body']                    = json_encode($data);
+            }
+        }
+
+        /**
+        * Filter the request arguments for all requests generated by this class
+        *
+        * @param array $args
+        */
+        $args = apply_filters('mc4wp_http_request_args', $args, $url);
+
+        // perform request
+        $response = wp_remote_request($url, $args);
+
+        // store request & response
+        $args['url']         = $url;
+        $this->last_request  = $args;
+        $this->last_response = $response;
+
+        // parse response
+        $data = $this->parse_response($response);
+
+        return $data;
+    }
+
+    /**
+    * @return array
+    */
+    private function get_headers()
+    {
+        global $wp_version;
+
+        $headers = array(
+            'Authorization' => sprintf('Basic %s', base64_encode('mc4wp:' . $this->api_key)),
+            'User-Agent'    => sprintf('mc4wp/%s; WordPress/%s; %s', MC4WP_VERSION, $wp_version, home_url()),
+        );
+
+        // Copy Accept-Language from browser headers
+        if (! empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
+            $headers['Accept-Language'] = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
+        }
+
+        return $headers;
+    }
+
+    /**
+    * @param array|WP_Error $response
+    *
+    * @return mixed
+    *
+    * @throws MC4WP_API_Connection_Exception|MC4WP_API_Resource_Not_Found_Exception|MC4WP_API_Exception
+    */
+    private function parse_response($response)
+    {
+        if ($response instanceof WP_Error) {
+            throw new MC4WP_API_Connection_Exception($response->get_error_message(), (int) $response->get_error_code(), $this->last_request);
+        }
+
+        // decode response body
+        $code    = (int) wp_remote_retrieve_response_code($response);
+        $message = wp_remote_retrieve_response_message($response);
+        $body    = wp_remote_retrieve_body($response);
+
+        // set body to "true" in case Mailchimp returned No Content
+        if ($code < 300 && empty($body)) {
+            $body = 'true';
+        }
+
+        $data = json_decode($body);
+        if ($code >= 400) {
+            // check for akamai errors
+            // {"type":"akamai_error_message","title":"akamai_503","status":503,"ref_no":"Reference Number: 00.950e16c3.1498559813.1450dbe2"}
+            if (is_object($data) && isset($data->type) && $data->type === 'akamai_error_message') {
+                throw new MC4WP_API_Connection_Exception($message, $code, $this->last_request, $this->last_response, $data);
+            }
+
+            if ($code === 404) {
+                throw new MC4WP_API_Resource_Not_Found_Exception($message, $code, $this->last_request, $this->last_response, $data);
+            }
+
+            // mailchimp returned an error..
+            throw new MC4WP_API_Exception($message, $code, $this->last_request, $this->last_response, $data);
+        }
+
+        // throw exception if unable to decode response
+        if ($data === null) {
+            throw new MC4WP_API_Exception($message, $code, $this->last_request, $this->last_response);
+        }
+
+        return $data;
+    }
+
+    /**
+    * Empties all data from previous response
+    */
+    private function reset()
+    {
+        $this->last_response = null;
+        $this->last_request  = null;
+    }
+
+    /**
+    * @return string
+    */
+    public function get_last_response_body()
+    {
+        return wp_remote_retrieve_body($this->last_response);
+    }
+
+    /**
+    * @return array
+    */
+    public function get_last_response_headers()
+    {
+        return wp_remote_retrieve_headers($this->last_response);
+    }
+
+    /**
+    * @return array|WP_Error
+    */
+    public function get_last_response()
+    {
+        return $this->last_response;
+    }
+}

+<?php
+
+class MC4WP_API_Connection_Exception extends MC4WP_API_Exception
+{
+}

+<?php
+
+/**
+ * Class MC4WP_API_Exception
+ *
+ * @property string $title
+ * @property string $detail
+ * @property array $errors
+ */
+class MC4WP_API_Exception extends Exception
+{
+    /**
+    * @var object
+    */
+    public $response = array();
+
+    /**
+    * @var object
+    */
+    public $request = array();
+
+    /**
+    * @var array
+    */
+    public $response_data = array();
+
+    /**
+     * MC4WP_API_Exception constructor.
+     *
+     * @param string $message
+     * @param int $code
+     * @param array $request
+     * @param array $response
+     * @param object $data
+     */
+    public function __construct($message, $code, $request = null, $response = null, $data = null)
+    {
+        parent::__construct($message, $code);
+
+        $this->request  = $request;
+        $this->response = $response;
+
+        $this->response_data = $data;
+    }
+
+    /**
+    * Backwards compatibility for direct property access.
+    * @param string $property
+    * @return mixed
+    */
+    public function __get($property)
+    {
+        if (in_array($property, array( 'title', 'detail', 'errors' ), true)) {
+            if (! empty($this->response_data) && isset($this->response_data->{$property})) {
+                return $this->response_data->{$property};
+            }
+
+            return '';
+        }
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        $string = $this->message . '.';
+
+        // add errors from response data returned by Mailchimp
+        if (! empty($this->response_data)) {
+            if (! empty($this->response_data->title) && $this->response_data->title !== $this->getMessage()) {
+                $string .= ' ' . $this->response_data->title . '.';
+            }
+
+            // add detail message
+            if (! empty($this->response_data->detail)) {
+                $string .= ' ' . $this->response_data->detail;
+            }
+
+            // add field specific errors
+            if (! empty($this->response_data->errors) && isset($this->response_data->errors[0]->field)) {
+                // strip off obsolete msg
+                $string = str_replace('For field-specific details, see the \'errors\' array.', '', $string);
+
+                // generate list of field errors
+                $field_errors = array();
+                foreach ($this->response_data->errors as $error) {
+                    if (! empty($error->field)) {
+                        $field_errors[] = sprintf('- %s : %s', $error->field, $error->message);
+                    } else {
+                        $field_errors[] = sprintf('- %s', $error->message);
+                    }
+                }
+
+                $string .= " \n" . join("\n", $field_errors);
+            }
+        }
+
+        // Add request data
+        if (! empty($this->request) && is_array($this->request)) {
+            $string .= "\n\n" . sprintf("Request: \n%s %s\n", $this->request['method'], $this->request['url']);
+
+            //          foreach ( $this->request['headers'] as $key => $value ) {
+            //              $string .= sprintf( "%s: %s\n", $key, $value );
+            //          }
+
+            if (! empty($this->request['body'])) {
+                $string .= "\n" . $this->request['body'];
+            }
+        }
+
+        // Add response data
+        if (! empty($this->response) && is_array($this->response)) {
+            $response_code    = wp_remote_retrieve_response_code($this->response);
+            $response_message = wp_remote_retrieve_response_message($this->response);
+            $response_body    = wp_remote_retrieve_body($this->response);
+            $string          .= "\n\n" . sprintf("Response: \n%d %s\n%s", $response_code, $response_message, $response_body);
+        }
+
+        return $string;
+    }
+}

+<?php
+
+class MC4WP_API_Resource_Not_Found_Exception extends MC4WP_API_Exception
+{
+    // Thrown when a requested resource does not exist in Mailchimp
+}

+<?php
+
+/**
+ * Class MC4WP_Service_Container
+ *
+ * @access private
+ * @ignore
+ */
+class MC4WP_Container implements ArrayAccess
+{
+    /**
+     * @var array
+     */
+    protected $services = array();
+
+    /**
+     * @var array
+     */
+    protected $resolved_services = array();
+
+    /**
+     * @param string $name
+     * @return boolean
+     */
+    public function has($name)
+    {
+        return isset($this->services[ $name ]);
+    }
+
+    /**
+     * @param string $name
+     *
+     * @return mixed
+     * @throws Exception
+     */
+    public function get($name)
+    {
+        if (! $this->has($name)) {
+            throw new Exception(sprintf('No service named %s was registered.', $name));
+        }
+
+        $service = $this->services[ $name ];
+
+        // is this a resolvable service?
+        if (is_callable($service)) {
+            // resolve service if it's not resolved yet
+            if (! isset($this->resolved_services[ $name ])) {
+                $this->resolved_services[ $name ] = call_user_func($service);
+            }
+
+            return $this->resolved_services[ $name ];
+        }
+
+        return $this->services[ $name ];
+    }
+
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Whether a offset exists
+     * @link http://php.net/manual/en/arrayaccess.offsetexists.php
+     *
+     * @param mixed $offset <p>
+     *                      An offset to check for.
+     *                      </p>
+     *
+     * @return boolean true on success or false on failure.
+     * </p>
+     * <p>
+     * The return value will be casted to boolean if non-boolean was returned.
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetExists($offset)
+    {
+        return $this->has($offset);
+    }
+
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Offset to retrieve
+     * @link http://php.net/manual/en/arrayaccess.offsetget.php
+     *
+     * @param mixed $offset <p>
+     *                      The offset to retrieve.
+     *                      </p>
+     *
+     * @return mixed Can return all value types.
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetGet($offset)
+    {
+        return $this->get($offset);
+    }
+
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Offset to set
+     * @link http://php.net/manual/en/arrayaccess.offsetset.php
+     *
+     * @param mixed $offset <p>
+     *                      The offset to assign the value to.
+     *                      </p>
+     * @param mixed $value  <p>
+     *                      The value to set.
+     *                      </p>
+     *
+     * @return void
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetSet($offset, $value)
+    {
+        $this->services[ $offset ] = $value;
+    }
+
+    /**
+     * (PHP 5 &gt;= 5.0.0)<br/>
+     * Offset to unset
+     * @link http://php.net/manual/en/arrayaccess.offsetunset.php
+     *
+     * @param mixed $offset <p>
+     *                      The offset to unset.
+     *                      </p>
+     *
+     * @return void
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetUnset($offset)
+    {
+        unset($this->services[ $offset ]);
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Debug_Log_Reader
+ */
+class MC4WP_Debug_Log_Reader
+{
+    /**
+     * @var resource|null
+     */
+    private $handle;
+
+    /**
+     * @var string
+     */
+    private static $regex = '/^(\[[\d \-\:]+\]) (\w+\:) (.*)$/S';
+
+    /**
+     * @var string
+     */
+    private static $html_template = '<span class="time">$1</span> <span class="level">$2</span> <span class="message">$3</span>';
+
+    /**
+     * @var string The log file location.
+     */
+    private $file;
+
+    /**
+     * MC4WP_Debug_Log_Reader constructor.
+     *
+     * @param $file
+     */
+    public function __construct($file)
+    {
+        $this->file = $file;
+    }
+
+    /**
+     * @return string
+     */
+    public function all()
+    {
+        return file_get_contents($this->file);
+    }
+
+    /**
+     * Sets file pointer to $n of lines from the end of file.
+     *
+     * @param int $n
+     */
+    private function seek_line_from_end($n)
+    {
+        $line_count = 0;
+
+        // get line count
+        while (! feof($this->handle)) {
+            fgets($this->handle);
+            ++$line_count;
+        }
+
+        // rewind to beginning
+        rewind($this->handle);
+
+        // calculate target
+        $target  = $line_count - $n;
+        $target  = $target > 1 ? $target : 1; // always skip first line because oh PHP header
+        $current = 0;
+
+        // keep reading until we're at target
+        while ($current < $target) {
+            fgets($this->handle);
+            ++$current;
+        }
+    }
+
+    /**
+     * @return string|null
+     */
+    public function read()
+    {
+
+        // open file if not yet opened
+        if (! is_resource($this->handle)) {
+            // doesn't exist?
+            if (! file_exists($this->file)) {
+                return null;
+            }
+
+            $this->handle = @fopen($this->file, 'r');
+
+            // unable to read?
+            if (! is_resource($this->handle)) {
+                return null;
+            }
+
+            // set pointer to 1000 files from EOF
+            $this->seek_line_from_end(1000);
+        }
+
+        // stop reading once we're at the end
+        if (feof($this->handle)) {
+            fclose($this->handle);
+            $this->handle = null;
+            return null;
+        }
+
+        // read line, up to 8kb
+        $text = fgets($this->handle);
+
+        // strip tags & trim
+        $text = strip_tags($text);
+        $text = trim($text);
+
+        return $text;
+    }
+
+    /**
+     * @return string
+     */
+    public function read_as_html()
+    {
+        $line = $this->read();
+
+        // null means end of file
+        if (is_null($line)) {
+            return null;
+        }
+
+        // empty string means empty line, but not yet eof
+        if (empty($line)) {
+            return '';
+        }
+
+        $line = preg_replace(self::$regex, self::$html_template, $line);
+        return $line;
+    }
+
+    /**
+     * Reads X number of lines.
+     *
+     * If $start is negative, reads from end of log file.
+     *
+     * @param int $start
+     * @param int $number
+     * @return string
+     */
+    public function lines($start, $number)
+    {
+        $handle = fopen($start, 'r');
+        $lines  = '';
+
+        $current_line = 0;
+        while ($current_line < $number) {
+            $lines .= fgets($handle);
+        }
+
+        fclose($handle);
+        return $lines;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Debug_Log
+ *
+ * Simple logging class which writes to a file, loosely based on PSR-3.
+ */
+class MC4WP_Debug_Log
+{
+    /**
+     * Detailed debug information
+     */
+    const DEBUG = 100;
+
+    /**
+     * Interesting events
+     *
+     * Examples: Visitor subscribed
+     */
+    const INFO = 200;
+
+    /**
+     * Exceptional occurrences that are not errors
+     *
+     * Examples: User already subscribed
+     */
+    const WARNING = 300;
+
+    /**
+     * Runtime errors
+     */
+    const ERROR = 400;
+
+    /**
+     * Logging levels from syslog protocol defined in RFC 5424
+     *
+     * @var array $levels Logging levels
+     */
+    protected static $levels = array(
+        self::DEBUG   => 'DEBUG',
+        self::INFO    => 'INFO',
+        self::WARNING => 'WARNING',
+        self::ERROR   => 'ERROR',
+    );
+
+    /**
+     * @var string The file to which messages should be written.
+     */
+    public $file;
+
+    /**
+     * @var int Only write messages with this level or higher
+     */
+    public $level;
+
+    /**
+     * @var resource
+     */
+    protected $stream;
+
+    /**
+     * MC4WP_Debug_Log constructor.
+     *
+     * @param string $file
+     * @param mixed $level;
+     */
+    public function __construct($file, $level = self::DEBUG)
+    {
+        $this->file  = $file;
+        $this->level = self::to_level($level);
+    }
+
+    /**
+     * @param mixed $level
+     * @param string $message
+     * @return boolean
+     */
+    public function log($level, $message)
+    {
+        $level = self::to_level($level);
+
+        // only log if message level is higher than log level
+        if ($level < $this->level) {
+            return false;
+        }
+
+        // obfuscate email addresses in log message since log might be public.
+        $message = mc4wp_obfuscate_email_addresses((string) $message);
+
+        // first, get rid of everything between "invisible" tags
+        $message = preg_replace('/<(?:style|script|head)>.+?<\/(?:style|script|head)>/is', '', $message);
+
+        // then, strip tags (while retaining content of these tags)
+        $message = strip_tags($message);
+        $message = trim($message);
+
+        /**
+         * Modifies the message that is written to the debug log.
+         * Return an empty string to skip logging this message altogether.
+         *
+         * @param string $message
+         */
+        $message = apply_filters('mc4wp_debug_log_message', $message);
+        if (empty($message)) {
+            return false;
+        }
+
+        // generate line
+        $level_name = self::get_level_name($level);
+        $datetime   = gmdate('Y-m-d H:i:s', time() + ( get_option('gmt_offset', 0) * HOUR_IN_SECONDS ));
+        $message    = sprintf('[%s] %s: %s', $datetime, $level_name, $message) . PHP_EOL;
+
+        // did we open stream yet?
+        if (! is_resource($this->stream)) {
+            // attempt to open stream
+            $this->stream = @fopen($this->file, 'c+');
+            if (! is_resource($this->stream)) {
+                return false;
+            }
+
+            // make sure first line of log file is a PHP tag + exit statement (to prevent direct file access)
+            $line            = fgets($this->stream);
+            $php_exit_string = '<?php exit; ?>';
+            if (strpos($line, $php_exit_string) !== 0) {
+                rewind($this->stream);
+                fwrite($this->stream, $php_exit_string . PHP_EOL . $line);
+            }
+
+            // place pointer at end of file
+            fseek($this->stream, 0, SEEK_END);
+        }
+
+        // lock file while we write, ignore errors (not much we can do)
+        flock($this->stream, LOCK_EX);
+
+        // write the message to the file
+        fwrite($this->stream, $message);
+
+        // unlock file again, but don't close it for remainder of this request
+        flock($this->stream, LOCK_UN);
+
+        return true;
+    }
+
+    /**
+     * @param string $message
+     * @return boolean
+     */
+    public function warning($message)
+    {
+        return $this->log(self::WARNING, $message);
+    }
+
+    /**
+     * @param string $message
+     * @return boolean
+     */
+    public function info($message)
+    {
+        return $this->log(self::INFO, $message);
+    }
+
+    /**
+     * @param string $message
+     * @return boolean
+     */
+    public function error($message)
+    {
+        return $this->log(self::ERROR, $message);
+    }
+
+    /**
+     * @param string $message
+     * @return boolean
+     */
+    public function debug($message)
+    {
+        return $this->log(self::DEBUG, $message);
+    }
+
+    /**
+     * Converts PSR-3 levels to local ones if necessary
+     *
+     * @param string|int Level number or name (PSR-3)
+     * @return int
+     */
+    public static function to_level($level)
+    {
+        if (is_string($level)) {
+            $level = strtoupper($level);
+            if (defined(__CLASS__ . '::' . $level)) {
+                return constant(__CLASS__ . '::' . $level);
+            }
+
+            throw new InvalidArgumentException('Level "' . $level . '" is not defined, use one of: ' . implode(', ', array_keys(self::$levels)));
+        }
+
+        return $level;
+    }
+
+    /**
+     * Gets the name of the logging level.
+     *
+     * @param  int    $level
+     * @return string
+     */
+    public static function get_level_name($level)
+    {
+        if (! isset(self::$levels[ $level ])) {
+            throw new InvalidArgumentException('Level "' . $level . '" is not defined, use one of: ' . implode(', ', array_keys(self::$levels)));
+        }
+
+        return self::$levels[ $level ];
+    }
+
+    /**
+     * Tests if the log file is writable
+     *
+     * @return bool
+     */
+    public function test()
+    {
+        $handle   = @fopen($this->file, 'a');
+        $writable = false;
+
+        if (is_resource($handle)) {
+            $writable = true;
+            fclose($handle);
+        }
+
+        return $writable;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Dynamic_Content_Tags
+ *
+ * @access private
+ * @ignore
+ */
+abstract class MC4WP_Dynamic_Content_Tags
+{
+    /**
+     * @var string The escape function for replacement values.
+     */
+    protected $escape_function = null;
+
+    /**
+     * @var array Array of registered dynamic content tags
+     */
+    protected $tags = array();
+
+    /**
+     * Register template tags
+     */
+    protected function register()
+    {
+        // Global tags can go here
+        $this->tags['cookie'] = array(
+            'description' => sprintf(__('Data from a cookie.', 'mailchimp-for-wp')),
+            'callback'    => array( $this, 'get_cookie' ),
+            'example'     => "cookie name='my_cookie' default='Default Value'",
+        );
+
+        $this->tags['email'] = array(
+            'description' => __('The email address of the current visitor (if known).', 'mailchimp-for-wp'),
+            'callback'    => array( $this, 'get_email' ),
+        );
+
+        $this->tags['current_url'] = array(
+            'description' => __('The URL of the page.', 'mailchimp-for-wp'),
+            'callback'    => 'mc4wp_get_request_url',
+        );
+
+        $this->tags['current_path'] = array(
+            'description' => __('The path of the page.', 'mailchimp-for-wp'),
+            'callback'    => 'mc4wp_get_request_path',
+        );
+
+        $this->tags['date'] = array(
+            'description' => sprintf(__('The current date. Example: %s.', 'mailchimp-for-wp'), '<strong>' . gmdate('Y/m/d', time() + ( get_option('gmt_offset') * HOUR_IN_SECONDS )) . '</strong>'),
+            'replacement' => gmdate('Y/m/d', time() + ( get_option('gmt_offset') * HOUR_IN_SECONDS )),
+        );
+
+        $this->tags['time'] = array(
+            'description' => sprintf(__('The current time. Example: %s.', 'mailchimp-for-wp'), '<strong>' . gmdate('H:i:s', time() + ( get_option('gmt_offset') * HOUR_IN_SECONDS )) . '</strong>'),
+            'replacement' => gmdate('H:i:s', time() + ( get_option('gmt_offset') * HOUR_IN_SECONDS )),
+        );
+
+        $this->tags['language'] = array(
+            'description' => sprintf(__('The site\'s language. Example: %s.', 'mailchimp-for-wp'), '<strong>' . get_locale() . '</strong>'),
+            'callback'    => 'get_locale',
+        );
+
+        $this->tags['ip'] = array(
+            'description' => sprintf(__('The visitor\'s IP address. Example: %s.', 'mailchimp-for-wp'), '<strong>' . mc4wp_get_request_ip_address() . '</strong>'),
+            'callback'    => 'mc4wp_get_request_ip_address',
+        );
+
+        $this->tags['user'] = array(
+            'description' => sprintf(__('The property of the currently logged-in user.', 'mailchimp-for-wp')),
+            'callback'    => array( $this, 'get_user_property' ),
+            'example'     => "user property='user_email'",
+        );
+
+        $this->tags['post'] = array(
+            'description' => sprintf(__('Property of the current page or post.', 'mailchimp-for-wp')),
+            'callback'    => array( $this, 'get_post_property' ),
+            'example'     => "post property='ID'",
+        );
+    }
+
+    /**
+     * @return array
+     */
+    public function all()
+    {
+        if ($this->tags === array()) {
+            $this->register();
+        }
+
+        return $this->tags;
+    }
+
+    /**
+     * @param array $matches
+     *
+     * @return string
+     */
+    protected function replace_tag(array $matches)
+    {
+        $tags = $this->all();
+        $tag  = $matches[1];
+
+        if (isset($tags[ $tag ])) {
+            $config      = $tags[ $tag ];
+            $replacement = '';
+
+            if (isset($config['replacement'])) {
+                $replacement = $config['replacement'];
+            } elseif (isset($config['callback'])) {
+                // parse attributes
+                $attributes = array();
+                if (isset($matches[2])) {
+                    $attribute_string = $matches[2];
+                    $attributes       = shortcode_parse_atts($attribute_string);
+                }
+
+                // call function
+                $replacement = call_user_func($config['callback'], $attributes);
+            }
+
+            if (is_callable($this->escape_function)) {
+                $replacement = call_user_func($this->escape_function, $replacement);
+            }
+
+            return $replacement;
+        }
+
+        // default to not replacing it
+        return $matches[0];
+    }
+
+    /**
+     * @param string $string The string containing dynamic content tags.
+     * @param string $escape_function Escape mode for the replacement value. Leave empty for no escaping.
+     * @return string
+     */
+    protected function replace($string, $escape_function = '')
+    {
+        $this->escape_function = $escape_function;
+
+        // replace strings like this: {tagname attr="value"}
+        $string = preg_replace_callback('/\{(\w+)(\ +(?:(?!\{)[^}\n])+)*\}/', array( $this, 'replace_tag' ), $string);
+
+        // call again to take care of nested variables
+        $string = preg_replace_callback('/\{(\w+)(\ +(?:(?!\{)[^}\n])+)*\}/', array( $this, 'replace_tag' ), $string);
+        return $string;
+    }
+
+    /**
+     * @param string $string
+     *
+     * @return string
+     */
+    protected function replace_in_html($string)
+    {
+        return $this->replace($string, 'esc_html');
+    }
+
+    /**
+     * @param string $string
+     *
+     * @return string
+     */
+    protected function replace_in_attributes($string)
+    {
+        return $this->replace($string, 'esc_attr');
+    }
+
+    /**
+     * @param string $string
+     *
+     * @return string
+     */
+    protected function replace_in_url($string)
+    {
+        return $this->replace($string, 'urlencode');
+    }
+
+    /**
+     * Gets data variable from cookie.
+     *
+     * @param array $args
+     *
+     * @return string
+     */
+    protected function get_cookie($args = array())
+    {
+        if (empty($args['name'])) {
+            return '';
+        }
+
+        $name    = $args['name'];
+        $default = isset($args['default']) ? $args['default'] : '';
+
+        if (isset($_COOKIE[ $name ])) {
+            return esc_html(stripslashes($_COOKIE[ $name ]));
+        }
+
+        return $default;
+    }
+
+    /*
+     * Get property of currently logged-in user
+     *
+     * @param array $args
+     *
+     * @return string
+     */
+    protected function get_user_property($args = array())
+    {
+        $property = empty($args['property']) ? 'user_email' : $args['property'];
+        $default  = isset($args['default']) ? $args['default'] : '';
+        $user     = wp_get_current_user();
+
+        if ($user instanceof WP_User && isset($user->{$property})) {
+            return esc_html($user->{$property});
+        }
+
+        return $default;
+    }
+
+    /*
+     * Get property of viewed post
+     *
+     * @param array $args
+     *
+     * @return string
+     */
+    protected function get_post_property($args = array())
+    {
+        global $post;
+        $property = empty($args['property']) ? 'ID' : $args['property'];
+        $default  = isset($args['default']) ? $args['default'] : '';
+
+        if ($post instanceof WP_Post && isset($post->{$property})) {
+            return $post->{$property};
+        }
+
+        return $default;
+    }
+
+    /**
+     * @return string
+     */
+    protected function get_email()
+    {
+        if (! empty($_REQUEST['EMAIL'])) {
+            return strip_tags($_REQUEST['EMAIL']);
+        }
+
+        // then , try logged-in user
+        if (is_user_logged_in()) {
+            $user = wp_get_current_user();
+            return $user->user_email;
+        }
+
+        // TODO: Read from cookie? Or add $_COOKIE support to {data} tag?
+        return '';
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Field_Formatter
+ *
+ * Formats values based on what the Mailchimp API expects or accepts for the given field types.
+ */
+class MC4WP_Field_Formatter
+{
+    /**
+     * @param mixed $value
+     * @param object $options
+     * @return array
+     */
+    public function address($value, $options = null)
+    {
+        // auto-format if this is a string
+        if (is_string($value)) {
+            // addr1, addr2, city, state, zip, country
+            $address_pieces = explode(',', $value);
+            $address_pieces = array_filter($address_pieces);
+            $address_pieces = array_values($address_pieces);
+
+            // try to fill it.... this is a long shot
+            $value = array(
+                'addr1' => $address_pieces[0],
+                'city'  => isset($address_pieces[1]) ? $address_pieces[1] : '',
+                'state' => isset($address_pieces[2]) ? $address_pieces[2] : '',
+                'zip'   => isset($address_pieces[3]) ? $address_pieces[3] : '',
+            );
+
+            if (! empty($address_pieces[4])) {
+                $value['country'] = $address_pieces[4];
+            }
+        } elseif (is_array($value)) {
+            // merge with array of empty defaults to allow skipping certain fields
+            $default = array_fill_keys(array( 'addr1', 'city', 'state', 'zip' ), '');
+            $value   = array_merge($default, $value);
+        }
+
+        return $value;
+    }
+
+    /**
+     * @param mixed $value
+     * @param object $options
+     * @return string
+     */
+    public function birthday($value, $options = null)
+    {
+        $format = is_object($options) && isset($options->date_format) ? $options->date_format : 'MM/DD';
+
+        if (is_array($value)) {
+            // allow for "day" and "month" fields
+            if (isset($value['month']) && isset($value['day'])) {
+                $value = $value['month'] . '/' . $value['day'];
+            } else {
+                // if other array, just join together
+                $value = join('/', $value);
+            }
+        }
+
+        $value = trim($value);
+        if (empty($value)) {
+            return $value;
+        }
+
+        // always use slashes as delimiter, so next part works
+        $value = str_replace(array( '.', '-' ), '/', $value);
+
+        // if format = DD/MM  OR if first part is definitely a day value (>12), then flip order
+        // this allows `strtotime` to understand `dd/mm` values
+        $values = explode('/', $value);
+        if ($format === 'DD/MM' || ( $values[0] > 12 && $values[0] <= 31 && isset($values[1]) && $values[1] <= 12 )) {
+            $values = array_reverse($values);
+            $value  = join('/', $values);
+        }
+
+        // Mailchimp expects a MM/DD format, regardless of their display preference
+        $value = (string) gmdate('m/d', strtotime($value));
+        return $value;
+    }
+
+    /**
+     * @param mixed $value
+     * @param object $options
+     * @return string
+     */
+    public function date($value, $options = null)
+    {
+        if (is_array($value)) {
+            // allow for "year", "month" and "day" keys
+            if (isset($value['year']) && isset($value['month']) && isset($value['day'])) {
+                $value = $value['year'] . '/' . $value['month'] . '/' . $value['day'];
+            } else {
+                // if other array, just join together
+                $value = join('/', $value);
+            }
+        }
+
+        $value = trim($value);
+        if (empty($value)) {
+            return $value;
+        }
+
+        // Mailchimp expects a Y-m-d format no matter the display preference
+        return (string) gmdate('Y-m-d', strtotime($value));
+    }
+
+    /**
+     * @param string $value
+     * @param object $options
+     * @return string
+     */
+    public function language($value, $options = null)
+    {
+        $value = trim($value);
+
+        $exceptions = array(
+            'pt_PT',
+            'es_ES',
+            'fr_CA',
+        );
+
+        if (! in_array($value, $exceptions, true)) {
+            $value = substr($value, 0, 2);
+        }
+
+        return $value;
+    }
+
+    /**
+     * @param mixed $value
+     * @param object $options
+     * @return bool
+     */
+    public function boolean($value, $options = null)
+    {
+        $falsey = array( 'false', '0' );
+
+        if (in_array($value, $falsey, true)) {
+            return false;
+        }
+
+        // otherwise, just cast.
+        return (bool) $value;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Field_Guesser
+ *
+ * @access private
+ * @ignore
+ */
+class MC4WP_Field_Guesser
+{
+    /**
+     * @var array
+     */
+    protected $fields;
+
+    /**
+     * @param array $fields
+     */
+    public function __construct(array $fields)
+    {
+        $fields       = array_change_key_case($fields, CASE_UPPER);
+        $this->fields = $fields;
+    }
+
+    /**
+     * Get all data which is namespaced with a given namespace
+     *
+     * @param string $namespace
+     *
+     * @return array
+     */
+    public function namespaced($namespace = 'mc4wp-')
+    {
+        $prefix = strtoupper($namespace);
+        $return = array();
+        $length = strlen($prefix);
+
+        foreach ($this->fields as $key => $value) {
+            if (strpos($key, $prefix) === 0) {
+                $new_key            = substr($key, $length);
+                $return[ $new_key ] = $value;
+            }
+        }
+
+        return $return;
+    }
+
+    /**
+     * Guess values for the following fields
+     *  - EMAIL
+     *  - NAME
+     *  - FNAME
+     *  - LNAME
+     *
+     * @return array
+     */
+    public function guessed()
+    {
+        $guessed = array();
+
+        foreach ($this->fields as $field => $value) {
+            // transform value into array to support 1-level arrays
+            $sub_fields = is_array($value) ? $value : array( $value );
+
+            foreach ($sub_fields as $sub_field_value) {
+                // poor man's urldecode, to get Enfold theme's contact element to work.
+                $sub_field_value = str_replace('%40', '@', $sub_field_value);
+
+                // is this an email value? if so, assume it's the EMAIL field
+                if (empty($guessed['EMAIL']) && is_string($sub_field_value) && is_email($sub_field_value)) {
+                    $guessed['EMAIL'] = $sub_field_value;
+                    continue 2;
+                }
+
+                // remove special characters from field name
+                $simple_key = str_replace(array( '-', '_', ' ' ), '', $field);
+
+                if (empty($guessed['FNAME']) && $this->string_contains($simple_key, array( 'FIRSTNAME', 'FNAME', 'GIVENNAME', 'FORENAME' ))) {
+                    // find first name field
+                    $guessed['FNAME'] = $sub_field_value;
+                } elseif (empty($guessed['LNAME']) && $this->string_contains($simple_key, array( 'LASTNAME', 'LNAME', 'SURNAME', 'FAMILYNAME' ))) {
+                    // find last name field
+                    $guessed['LNAME'] = $sub_field_value;
+                } elseif (empty($guessed['NAME']) && $this->string_contains($simple_key, 'NAME')) {
+                    // find name field
+                    $guessed['NAME'] = $sub_field_value;
+                }
+            }
+        }
+
+        return $guessed;
+    }
+
+    /**
+     * @param $methods
+     *
+     * @return array
+     */
+    public function combine(array $methods)
+    {
+        $combined = array();
+
+        foreach ($methods as $method) {
+            if (method_exists($this, $method)) {
+                $combined = array_merge($combined, call_user_func(array( $this, $method )));
+            }
+        }
+
+        return $combined;
+    }
+
+    /**
+     * @param string $haystack
+     * @param string|array $needles
+     *
+     * @return bool
+     */
+    private function string_contains($haystack, $needles)
+    {
+        if (! is_array($needles)) {
+            $needles = array( $needles );
+        }
+
+        foreach ($needles as $needle) {
+            if (strpos($haystack, $needle) !== false) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}

+<?php
+
+/**
+* Class MC4WP_Field_Map
+*
+* @access private
+* @since 4.0
+* @ignore
+*/
+class MC4WP_List_Data_Mapper
+{
+    /**
+    * @var array
+    */
+    private $data = array();
+
+    /**
+    * @var array
+    */
+    private $list_ids = array();
+
+    /**
+    * @var MC4WP_Field_Formatter
+    */
+    private $formatter;
+
+    /**
+     * @var MC4WP_MailChimp
+     */
+    private $mailchimp;
+
+    /**
+    * @param array $data
+    * @param array $list_ids
+    */
+    public function __construct(array $data, array $list_ids)
+    {
+        $this->data = array_change_key_case($data, CASE_UPPER);
+        if (! isset($this->data['EMAIL'])) {
+            throw new InvalidArgumentException('Data needs at least an EMAIL key.');
+        }
+
+        $this->list_ids  = $list_ids;
+        $this->formatter = new MC4WP_Field_Formatter();
+        $this->mailchimp = new MC4WP_MailChimp();
+    }
+
+    /**
+    * @return MC4WP_MailChimp_Subscriber[]
+    */
+    public function map()
+    {
+        $map = array();
+
+        foreach ($this->list_ids as $list_id) {
+            $map[ "$list_id" ] = $this->map_list($list_id);
+        }
+
+        return $map;
+    }
+
+    /**
+    * @param string $list_id
+    * @return MC4WP_MailChimp_Subscriber
+    * @throws Exception
+    */
+    protected function map_list($list_id)
+    {
+        $subscriber                = new MC4WP_MailChimp_Subscriber();
+        $subscriber->email_address = $this->data['EMAIL'];
+
+        // find merge fields
+        $merge_fields = $this->mailchimp->get_list_merge_fields($list_id);
+        foreach ($merge_fields as $merge_field) {
+            // skip EMAIL field as that is handled separately (see above)
+            if ($merge_field->tag === 'EMAIL') {
+                continue;
+            }
+
+            // use empty() here to skip empty field values
+            if (empty($this->data[ $merge_field->tag ])) {
+                continue;
+            }
+
+            // format field value
+            $value = $this->data[ $merge_field->tag ];
+            $value = $this->format_merge_field_value($merge_field, $value);
+
+            // add to map
+            $subscriber->merge_fields[ $merge_field->tag ] = $value;
+        }
+
+        // find interest categories
+        if (! empty($this->data['INTERESTS'])) {
+            $interest_categories = $this->mailchimp->get_list_interest_categories($list_id);
+            foreach ($interest_categories as $interest_category) {
+                foreach ($interest_category->interests as $interest_id => $interest_name) {
+                    // straight lookup by ID as key with value copy.
+                    if (isset($this->data['INTERESTS'][ $interest_id ])) {
+                        $subscriber->interests[ $interest_id ] = $this->formatter->boolean($this->data['INTERESTS'][ $interest_id ]);
+                    }
+
+                    // straight lookup by ID as top-level value
+                    if (in_array($interest_id, $this->data['INTERESTS'], false)) {
+                        $subscriber->interests[ $interest_id ] = true;
+                    }
+
+                    // look in array with category ID as key.
+                    if (isset($this->data['INTERESTS'][ $interest_category->id ])) {
+                        $value  = $this->data['INTERESTS'][ $interest_category->id ];
+                        $values = is_array($value) ? $value : array_map('trim', explode('|', $value));
+
+                        // find by category ID + interest ID
+                        if (in_array($interest_id, $values, false)) {
+                            $subscriber->interests[ $interest_id ] = true;
+                        }
+
+                        // find by category ID + interest name
+                        if (in_array($interest_name, $values, true)) {
+                            $subscriber->interests[ $interest_id ] = true;
+                        }
+                    }
+                }
+            }
+        }
+
+        // add GDPR marketing permissions
+        if (! empty($this->data['MARKETING_PERMISSIONS'])) {
+            $values                = $this->data['MARKETING_PERMISSIONS'];
+            $values                = is_array($values) ? $values : explode(',', $values);
+            $values                = array_map('trim', $values);
+            $marketing_permissions = $this->mailchimp->get_list_marketing_permissions($list_id);
+            foreach ($marketing_permissions as $mp) {
+                if (in_array($mp->marketing_permission_id, $values, true) || in_array($mp->text, $values, true)) {
+                    $subscriber->marketing_permissions[] = (object) array(
+                        'marketing_permission_id' => $mp->marketing_permission_id,
+                        'enabled'                 => true,
+                    );
+                }
+            }
+        }
+
+        // find language
+        /* @see http://kb.mailchimp.com/lists/managing-subscribers/view-and-edit-subscriber-languages?utm_source=mc-api&utm_medium=docs&utm_campaign=apidocs&_ga=1.211519638.2083589671.1469697070 */
+        if (! empty($this->data['MC_LANGUAGE'])) {
+            $subscriber->language = $this->formatter->language($this->data['MC_LANGUAGE']);
+        }
+
+        return $subscriber;
+    }
+
+
+    /**
+     * @param object $merge_field
+     * @param string $value
+     *
+     * @return mixed
+    */
+    private function format_merge_field_value($merge_field, $value)
+    {
+        $field_type = strtolower($merge_field->type);
+
+        if (method_exists($this->formatter, $field_type)) {
+            $value = call_user_func(array( $this->formatter, $field_type ), $value, $merge_field->options);
+        }
+
+        /**
+        * Filters the value of a field after it is formatted.
+        *
+        * Use this to format a field value according to the field type (in Mailchimp).
+        *
+        * @since 3.0
+        * @param string $value The value
+        * @param string $field_type The type of the field (in Mailchimp)
+        */
+        $value = apply_filters('mc4wp_format_field_value', $value, $field_type);
+
+        return $value;
+    }
+}

+<?php
+
+class MC4WP_MailChimp_Subscriber
+{
+    /**
+     * @var string Email address for this subscriber.
+     */
+    public $email_address = '';
+
+    /**
+     * @var array The key of this object’s properties is the ID of the interest in question.
+     */
+    public $interests = array();
+
+    /**
+     * @var array An individual merge var and value for a member.
+     */
+    public $merge_fields = array();
+
+    /**
+     * @var string Subscriber’s status.
+     */
+    public $status = 'pending';
+
+    /**
+     * @var string Type of email this member asked to get (‘html’ or ‘text’).
+     */
+    public $email_type = 'html';
+
+    /**
+     * @var string IP address the subscriber signed up from.
+     */
+    public $ip_signup;
+
+    /**
+     * @var string The subscriber's language
+     */
+    public $language;
+
+    /**
+     * @var boolean VIP status for subscriber.
+     */
+    public $vip;
+
+    /**
+     * @var array The tags applied to this member.
+     */
+    public $tags = array();
+
+    /**
+     * @var array The marketing permissions for the subscriber.
+     */
+    public $marketing_permissions = array();
+
+    /**
+     * Retrieves member data as an array, without null values.
+     *
+     * @return array
+     */
+    public function to_array()
+    {
+        $all   = get_object_vars($this);
+        $array = array();
+
+        foreach ($all as $key => $value) {
+            // skip null values
+            if ($value === null) {
+                continue;
+            }
+
+            // skip empty marketing_permissions property
+            if ($key === 'marketing_permissions' && empty($value)) {
+                continue;
+            }
+
+            // otherwise, add to final array
+            $array[ $key ] = $value;
+        }
+
+        return $array;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Plugin
+ *
+ * Helper class for easy access to information like the plugin file or plugin directory.
+ * Used in MC4WP Premium.
+ *
+ * @access public
+ * @ignore
+ */
+class MC4WP_Plugin
+{
+    /**
+     * @var string The plugin version.
+     */
+    protected $version;
+
+    /**
+     * @var string The main plugin file.
+     */
+    protected $file;
+
+    /**
+     * @param string $file The plugin version.
+     * @param string $version The main plugin file.
+     */
+    public function __construct($file, $version)
+    {
+        $this->file    = $file;
+        $this->version = $version;
+    }
+
+    /**
+     * Get the main plugin file.
+     *
+     * @return string
+     */
+    public function file()
+    {
+        return $this->file;
+    }
+
+    /**
+     * Get the plugin version.
+     *
+     * @return string
+     */
+    public function version()
+    {
+        return $this->version;
+    }
+
+    /**
+     * Gets the directory the plugin lives in.
+     *
+     * @param string $path
+     *
+     * @return string
+     */
+    public function dir($path = '')
+    {
+
+        // ensure path has leading slash
+        if ('' !== $path) {
+            $path = '/' . ltrim($path, '/');
+        }
+
+        return dirname($this->file) . $path;
+    }
+
+    /**
+     * Gets the URL to the plugin files.
+     *
+     * @param string $path
+     *
+     * @return string
+     */
+    public function url($path = '')
+    {
+        return plugins_url($path, $this->file);
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Queue_Job
+ *
+ * @ignore
+ */
+class MC4WP_Queue_Job
+{
+    /**
+     * @var string
+     */
+    public $id;
+
+    /**
+     * @var mixed
+     */
+    public $data;
+
+    /**
+     * @var int
+     */
+    public $max_attempts = 1;
+
+    /**
+     * @var int
+     */
+    public $attempts = 0;
+
+    /**
+     * MC4WP_Queue_Job constructor.
+     *
+     * @param mixed $data
+     */
+    public function __construct($data)
+    {
+        $this->id   = (string) microtime(true) . rand(1, 10000);
+        $this->data = $data;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Queue
+ *
+ * @ignore
+ */
+class MC4WP_Queue
+{
+    /**
+     * @var MC4WP_Queue_Job[]
+     */
+    protected $jobs;
+
+    /**
+     * @var string
+     */
+    protected $option_name;
+
+    /**
+     * @var bool
+     */
+    protected $dirty = false;
+
+    /**
+     * @var int
+     */
+    const MAX_JOB_COUNT = 1000;
+
+    /**
+     * MC4WP_Ecommerce_Queue constructor.
+     *
+     * @param string $option_name
+     */
+    public function __construct($option_name)
+    {
+        $this->option_name = $option_name;
+
+        register_shutdown_function(array( $this, 'save' ));
+    }
+
+    /**
+     * Load jobs from option
+     */
+    protected function load()
+    {
+        if (! is_null($this->jobs)) {
+            return;
+        }
+
+        $jobs = get_option($this->option_name, array());
+
+        if (! is_array($jobs)) {
+            $jobs = array();
+        } else {
+            $valid_jobs = array();
+
+            foreach ($jobs as $i => $obj) {
+                // filter invalid data from array
+                if (! is_object($obj) || empty($obj->data)) {
+                    continue;
+                }
+
+                // make sure each job is instance of MC4WP_Queue_Job
+                if ($obj instanceof MC4WP_Queue_Job) {
+                    $job = $obj;
+                } else {
+                    $job     = new MC4WP_Queue_Job($obj->data);
+                    $job->id = $obj->id;
+                }
+
+                $valid_jobs[] = $job;
+            }
+
+            $jobs = $valid_jobs;
+        }
+
+        $this->jobs = $jobs;
+    }
+
+    /**
+     * Get all jobs in the queue
+     *
+     * @return MC4WP_Queue_Job[] Array of jobs
+     */
+    public function all()
+    {
+        $this->load();
+        return $this->jobs;
+    }
+
+    /**
+     * Add job to queue
+     *
+     * @param mixed $data
+     * @return boolean
+     */
+    public function put($data)
+    {
+        $this->load();
+
+        // check if we already have a job with same data
+        foreach ($this->jobs as $job) {
+            if ($job->data === $data) {
+                return false;
+            }
+        }
+
+        // if we have more than MAX_JOB_COUNT jobs, remove first job item.
+        // this protects against an ever-growing job list, but also potentially loses jobs if the queue is not processed soon enough.
+        if (count($this->jobs) > self::MAX_JOB_COUNT) {
+            array_shift($this->jobs);
+        }
+
+        // add job to end of jobs array
+        $job          = new MC4WP_Queue_Job($data);
+        $this->jobs[] = $job;
+        $this->dirty  = true;
+        return true;
+    }
+
+    /**
+     * Get all jobs in the queue
+     *
+     * @return MC4WP_Queue_Job|false
+     */
+    public function get()
+    {
+        $this->load();
+
+        // do we have jobs?
+        if (count($this->jobs) === 0) {
+            return false;
+        }
+
+        // return first element
+        return reset($this->jobs);
+    }
+
+    /**
+     * @param MC4WP_Queue_Job $job
+     */
+    public function delete(MC4WP_Queue_Job $job)
+    {
+        $this->load();
+
+        $index = array_search($job, $this->jobs, true);
+
+        // check for "false" here, as 0 is a valid index.
+        if ($index !== false) {
+            unset($this->jobs[ $index ]);
+            $this->jobs  = array_values($this->jobs);
+            $this->dirty = true;
+        }
+    }
+
+    /**
+     * @param MC4WP_Queue_Job $job
+     */
+    public function reschedule(MC4WP_Queue_Job $job)
+    {
+        $this->load();
+
+        // delete job from start of queue
+        $this->delete($job);
+
+        // add job to end of queue
+        $this->jobs[] = $job;
+        $this->dirty  = true;
+    }
+
+    /**
+     * Reset queue
+     */
+    public function reset()
+    {
+        $this->jobs  = array();
+        $this->dirty = true;
+    }
+
+    /**
+     * Save the queue
+     */
+    public function save()
+    {
+        if (! $this->dirty || is_null($this->jobs)) {
+            return false;
+        }
+
+        $success = update_option($this->option_name, $this->jobs, false);
+
+        if ($success) {
+            $this->dirty = false;
+        }
+
+        return $success;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Tools
+ *
+ * @access private
+ * @ignore
+ */
+class MC4WP_Tools
+{
+    /**
+     * @return array
+     */
+    public static function get_countries()
+    {
+        return array(
+            'AF' => 'Afghanistan',
+            'AX' => 'Aland Islands',
+            'AL' => 'Albania',
+            'DZ' => 'Algeria',
+            'AS' => 'American Samoa',
+            'AD' => 'Andorra',
+            'AO' => 'Angola',
+            'AI' => 'Anguilla',
+            'AQ' => 'Antarctica',
+            'AG' => 'Antigua and Barbuda',
+            'AR' => 'Argentina',
+            'AM' => 'Armenia',
+            'AW' => 'Aruba',
+            'AU' => 'Australia',
+            'AT' => 'Austria',
+            'AZ' => 'Azerbaijan',
+            'BS' => 'Bahamas',
+            'BH' => 'Bahrain',
+            'BD' => 'Bangladesh',
+            'BB' => 'Barbados',
+            'BY' => 'Belarus',
+            'BE' => 'Belgium',
+            'BZ' => 'Belize',
+            'BJ' => 'Benin',
+            'BM' => 'Bermuda',
+            'BT' => 'Bhutan',
+            'BO' => 'Bolivia',
+            'BQ' => 'Bonaire, Saint Eustatius and Saba',
+            'BA' => 'Bosnia and Herzegovina',
+            'BW' => 'Botswana',
+            'BV' => 'Bouvet Island',
+            'BR' => 'Brazil',
+            'IO' => 'British Indian Ocean Territory',
+            'VG' => 'British Virgin Islands',
+            'BN' => 'Brunei',
+            'BG' => 'Bulgaria',
+            'BF' => 'Burkina Faso',
+            'BI' => 'Burundi',
+            'KH' => 'Cambodia',
+            'CM' => 'Cameroon',
+            'CA' => 'Canada',
+            'CV' => 'Cape Verde',
+            'KY' => 'Cayman Islands',
+            'CF' => 'Central African Republic',
+            'TD' => 'Chad',
+            'CL' => 'Chile',
+            'CN' => 'China',
+            'CX' => 'Christmas Island',
+            'CC' => 'Cocos Islands',
+            'CO' => 'Colombia',
+            'KM' => 'Comoros',
+            'CK' => 'Cook Islands',
+            'CR' => 'Costa Rica',
+            'HR' => 'Croatia',
+            'CU' => 'Cuba',
+            'CW' => 'Curacao',
+            'CY' => 'Cyprus',
+            'CZ' => 'Czech Republic',
+            'CD' => 'Democratic Republic of the Congo',
+            'DK' => 'Denmark',
+            'DJ' => 'Djibouti',
+            'DM' => 'Dominica',
+            'DO' => 'Dominican Republic',
+            'TL' => 'East Timor',
+            'EC' => 'Ecuador',
+            'EG' => 'Egypt',
+            'SV' => 'El Salvador',
+            'GQ' => 'Equatorial Guinea',
+            'ER' => 'Eritrea',
+            'EE' => 'Estonia',
+            'ET' => 'Ethiopia',
+            'FK' => 'Falkland Islands',
+            'FO' => 'Faroe Islands',
+            'FJ' => 'Fiji',
+            'FI' => 'Finland',
+            'FR' => 'France',
+            'GF' => 'French Guiana',
+            'PF' => 'French Polynesia',
+            'TF' => 'French Southern Territories',
+            'GA' => 'Gabon',
+            'GM' => 'Gambia',
+            'GE' => 'Georgia',
+            'DE' => 'Germany',
+            'GH' => 'Ghana',
+            'GI' => 'Gibraltar',
+            'GR' => 'Greece',
+            'GL' => 'Greenland',
+            'GD' => 'Grenada',
+            'GP' => 'Guadeloupe',
+            'GU' => 'Guam',
+            'GT' => 'Guatemala',
+            'GG' => 'Guernsey',
+            'GN' => 'Guinea',
+            'GW' => 'Guinea-Bissau',
+            'GY' => 'Guyana',
+            'HT' => 'Haiti',
+            'HM' => 'Heard Island and McDonald Islands',
+            'HN' => 'Honduras',
+            'HK' => 'Hong Kong',
+            'HU' => 'Hungary',
+            'IS' => 'Iceland',
+            'IN' => 'India',
+            'ID' => 'Indonesia',
+            'IR' => 'Iran',
+            'IQ' => 'Iraq',
+            'IE' => 'Ireland',
+            'IM' => 'Isle of Man',
+            'IL' => 'Israel',
+            'IT' => 'Italy',
+            'CI' => 'Ivory Coast',
+            'JM' => 'Jamaica',
+            'JP' => 'Japan',
+            'JE' => 'Jersey',
+            'JO' => 'Jordan',
+            'KZ' => 'Kazakhstan',
+            'KE' => 'Kenya',
+            'KI' => 'Kiribati',
+            'XK' => 'Kosovo',
+            'KW' => 'Kuwait',
+            'KG' => 'Kyrgyzstan',
+            'LA' => 'Laos',
+            'LV' => 'Latvia',
+            'LB' => 'Lebanon',
+            'LS' => 'Lesotho',
+            'LR' => 'Liberia',
+            'LY' => 'Libya',
+            'LI' => 'Liechtenstein',
+            'LT' => 'Lithuania',
+            'LU' => 'Luxembourg',
+            'MO' => 'Macao',
+            'MK' => 'Macedonia',
+            'MG' => 'Madagascar',
+            'MW' => 'Malawi',
+            'MY' => 'Malaysia',
+            'MV' => 'Maldives',
+            'ML' => 'Mali',
+            'MT' => 'Malta',
+            'MH' => 'Marshall Islands',
+            'MQ' => 'Martinique',
+            'MR' => 'Mauritania',
+            'MU' => 'Mauritius',
+            'YT' => 'Mayotte',
+            'MX' => 'Mexico',
+            'FM' => 'Micronesia',
+            'MD' => 'Moldova',
+            'MC' => 'Monaco',
+            'MN' => 'Mongolia',
+            'ME' => 'Montenegro',
+            'MS' => 'Montserrat',
+            'MA' => 'Morocco',
+            'MZ' => 'Mozambique',
+            'MM' => 'Myanmar',
+            'NA' => 'Namibia',
+            'NR' => 'Nauru',
+            'NP' => 'Nepal',
+            'NL' => 'Netherlands',
+            'NC' => 'New Caledonia',
+            'NZ' => 'New Zealand',
+            'NI' => 'Nicaragua',
+            'NE' => 'Niger',
+            'NG' => 'Nigeria',
+            'NU' => 'Niue',
+            'NF' => 'Norfolk Island',
+            'KP' => 'North Korea',
+            'MP' => 'Northern Mariana Islands',
+            'NO' => 'Norway',
+            'OM' => 'Oman',
+            'PK' => 'Pakistan',
+            'PW' => 'Palau',
+            'PS' => 'Palestinian Territory',
+            'PA' => 'Panama',
+            'PG' => 'Papua New Guinea',
+            'PY' => 'Paraguay',
+            'PE' => 'Peru',
+            'PH' => 'Philippines',
+            'PN' => 'Pitcairn',
+            'PL' => 'Poland',
+            'PT' => 'Portugal',
+            'PR' => 'Puerto Rico',
+            'QA' => 'Qatar',
+            'CG' => 'Republic of the Congo',
+            'RE' => 'Reunion',
+            'RO' => 'Romania',
+            'RU' => 'Russia',
+            'RW' => 'Rwanda',
+            'BL' => 'Saint Barthelemy',
+            'SH' => 'Saint Helena',
+            'KN' => 'Saint Kitts and Nevis',
+            'LC' => 'Saint Lucia',
+            'MF' => 'Saint Martin',
+            'PM' => 'Saint Pierre and Miquelon',
+            'VC' => 'Saint Vincent and the Grenadines',
+            'WS' => 'Samoa',
+            'SM' => 'San Marino',
+            'ST' => 'Sao Tome and Principe',
+            'SA' => 'Saudi Arabia',
+            'SN' => 'Senegal',
+            'RS' => 'Serbia',
+            'SC' => 'Seychelles',
+            'SL' => 'Sierra Leone',
+            'SG' => 'Singapore',
+            'SX' => 'Sint Maarten',
+            'SK' => 'Slovakia',
+            'SI' => 'Slovenia',
+            'SB' => 'Solomon Islands',
+            'SO' => 'Somalia',
+            'ZA' => 'South Africa',
+            'GS' => 'South Georgia and the South Sandwich Islands',
+            'KR' => 'South Korea',
+            'SS' => 'South Sudan',
+            'ES' => 'Spain',
+            'LK' => 'Sri Lanka',
+            'SD' => 'Sudan',
+            'SR' => 'Suriname',
+            'SJ' => 'Svalbard and Jan Mayen',
+            'SZ' => 'Swaziland',
+            'SE' => 'Sweden',
+            'CH' => 'Switzerland',
+            'SY' => 'Syria',
+            'TW' => 'Taiwan',
+            'TJ' => 'Tajikistan',
+            'TZ' => 'Tanzania',
+            'TH' => 'Thailand',
+            'TG' => 'Togo',
+            'TK' => 'Tokelau',
+            'TO' => 'Tonga',
+            'TT' => 'Trinidad and Tobago',
+            'TN' => 'Tunisia',
+            'TR' => 'Turkey',
+            'TM' => 'Turkmenistan',
+            'TC' => 'Turks and Caicos Islands',
+            'TV' => 'Tuvalu',
+            'VI' => 'U.S. Virgin Islands',
+            'UG' => 'Uganda',
+            'UA' => 'Ukraine',
+            'AE' => 'United Arab Emirates',
+            'GB' => 'United Kingdom',
+            'US' => 'United States',
+            'UM' => 'United States Minor Outlying Islands',
+            'UY' => 'Uruguay',
+            'UZ' => 'Uzbekistan',
+            'VU' => 'Vanuatu',
+            'VA' => 'Vatican',
+            'VE' => 'Venezuela',
+            'VN' => 'Vietnam',
+            'WF' => 'Wallis and Futuna',
+            'EH' => 'Western Sahara',
+            'YE' => 'Yemen',
+            'ZM' => 'Zambia',
+            'ZW' => 'Zimbabwe',
+        );
+    }
+}

+<?php
+
+defined('ABSPATH') or exit;
+
+add_action('mc4wp_refresh_mailchimp_lists', 'mc4wp_refresh_mailchimp_lists');

+<?php
+
+defined('ABSPATH') or exit;
+
+add_filter('mc4wp_form_data', 'mc4wp_add_name_data', 60);
+add_filter('mc4wp_integration_data', 'mc4wp_add_name_data', 60);
+
+add_filter('mctb_data', '_mc4wp_update_groupings_data', PHP_INT_MAX);
+add_filter('mc4wp_form_data', '_mc4wp_update_groupings_data', PHP_INT_MAX);
+add_filter('mc4wp_integration_data', '_mc4wp_update_groupings_data', PHP_INT_MAX);
+add_filter('mailchimp_sync_user_data', '_mc4wp_update_groupings_data', PHP_INT_MAX);
+add_filter('mc4wp_use_sslverify', '_mc4wp_use_sslverify', 1);
+
+mc4wp_apply_deprecated_filters('mc4wp_merge_vars', 'mc4wp_form_data');
+mc4wp_apply_deprecated_filters('mc4wp_form_merge_vars', 'mc4wp_form_data');
+mc4wp_apply_deprecated_filters('mc4wp_integration_merge_vars', 'mc4wp_integration_data');

+<?php

+<?php
+
+/**
+ * Gets the absolute url to edit a form
+ *
+ * @param int $form_id ID of the form
+ * @param string $tab Tab identifier to open
+ *
+ * @return string
+ */
+function mc4wp_get_edit_form_url($form_id, $tab = '')
+{
+    $url = admin_url(sprintf('admin.php?page=mailchimp-for-wp-forms&view=edit-form&form_id=%d', $form_id));
+
+    if (! empty($tab)) {
+        $url .= sprintf('&tab=%s', $tab);
+    }
+
+    return $url;
+}
+
+/**
+ * Get absolute URL to create a new form
+ *
+ * @return string
+ */
+function mc4wp_get_add_form_url()
+{
+    $url = admin_url('admin.php?page=mailchimp-for-wp-forms&view=add-form');
+    return $url;
+}

+<?php
+
+/**
+* This class takes care of all form assets related functionality
+ *
+ * @access private
+ * @ignore
+*/
+class MC4WP_Form_Asset_Manager
+{
+    /**
+     * @var bool Flag to determine whether scripts should be enqueued.
+     */
+    private $load_scripts = false;
+
+    /**
+     * Add hooks
+     */
+    public function add_hooks()
+    {
+        add_action('init', array( $this, 'register_scripts' ));
+        add_action('wp_enqueue_scripts', array( $this, 'load_stylesheets' ));
+        add_action('wp_footer', array( $this, 'load_scripts' ));
+        add_action('mc4wp_output_form', array( $this, 'before_output_form' ));
+        add_action('script_loader_tag', array( $this, 'add_defer_attribute' ), 10, 2);
+    }
+
+    /**
+     * Register scripts to be enqueued later.
+     */
+    public function register_scripts()
+    {
+        wp_register_script('mc4wp-forms-api', mc4wp_plugin_url('assets/js/forms.js'), array(), MC4WP_VERSION, true);
+    }
+
+    /**
+     * @param string $stylesheet
+     *
+     * @return bool
+     */
+    public function is_registered_stylesheet($stylesheet)
+    {
+        $stylesheets = $this->get_registered_stylesheets();
+        return in_array($stylesheet, $stylesheets, true);
+    }
+
+    /**
+     * @return array
+     */
+    public function get_registered_stylesheets()
+    {
+        return array(
+            'basic',
+            'themes',
+        );
+    }
+
+    /**
+     * @param string $stylesheet
+     *
+     * @return string
+     */
+    public function get_stylesheet_url($stylesheet)
+    {
+        return mc4wp_plugin_url('assets/css/form-' . $stylesheet . '.css');
+    }
+
+    /**
+     * Get array of stylesheet handles which should be enqueued.
+     *
+     * @return array
+     */
+    public function get_active_stylesheets()
+    {
+        $stylesheets = (array) get_option('mc4wp_form_stylesheets', array());
+
+        /**
+         * Filters the stylesheets to be loaded
+         *
+         * Should be an array of stylesheet handles previously registered using `wp_register_style`.
+         * Each value is prefixed with `mc4wp-form-` to get the handle.
+         *
+         * Return an empty array if you want to disable the loading of all stylesheets.
+         *
+         * @since 3.0
+         * @param array $stylesheets Array of valid stylesheet handles
+         */
+        $stylesheets = (array) apply_filters('mc4wp_form_stylesheets', $stylesheets);
+        return $stylesheets;
+    }
+
+    /**
+     * Load the various stylesheets
+     */
+    public function load_stylesheets()
+    {
+        $stylesheets = $this->get_active_stylesheets();
+
+        foreach ($stylesheets as $stylesheet) {
+            if (! $this->is_registered_stylesheet($stylesheet)) {
+                continue;
+            }
+
+            $handle = 'mc4wp-form-' . $stylesheet;
+            $url    = $this->get_stylesheet_url($stylesheet);
+            wp_enqueue_style($handle, $url, array(), MC4WP_VERSION);
+            add_editor_style($url);
+        }
+
+        /**
+         * @ignore
+         */
+        do_action('mc4wp_load_form_stylesheets', $stylesheets);
+    }
+
+    /**
+     * Get data object for client-side use for after a form is submitted over HTTP POST (not AJAX).
+     *
+     * @return array
+     */
+    public function get_submitted_form_data()
+    {
+        $submitted_form = mc4wp_get_submitted_form();
+        if (! $submitted_form instanceof MC4WP_Form) {
+            return null;
+        }
+
+        $data = array(
+            'id'         => $submitted_form->ID,
+            'event'      => $submitted_form->last_event,
+            'data'       => $submitted_form->get_data(),
+            'element_id' => $submitted_form->config['element_id'],
+            'auto_scroll' => true,
+        );
+
+        if ($submitted_form->has_errors()) {
+            $data['errors'] = $submitted_form->errors;
+        }
+
+        /**
+         * Filters the `auto_scroll` setting for when a form is submitted.
+         * Set to false to disable scrolling to form.
+         *
+         * @param boolean $auto_scroll
+         * @since 3.0
+         */
+        $data['auto_scroll'] = apply_filters('mc4wp_form_auto_scroll', $data['auto_scroll']);
+
+        return $data;
+    }
+
+    /**
+     * Load JavaScript files
+     */
+    public function before_output_form()
+    {
+        $load_scripts = apply_filters('mc4wp_load_form_scripts', true);
+        if (! $load_scripts) {
+            return;
+        }
+
+        $this->print_dummy_javascript();
+        $this->load_scripts = true;
+    }
+
+    /**
+     * Prints dummy JavaScript which allows people to call `mc4wp.forms.on()` before the JS is loaded.
+     */
+    public function print_dummy_javascript()
+    {
+        echo '<script>';
+        include __DIR__ . '/views/js/dummy-api.js';
+        echo '</script>';
+    }
+
+    /**
+    * Outputs the inline JavaScript that is used to enhance forms
+    */
+    public function load_scripts()
+    {
+        $load_scripts = apply_filters('mc4wp_load_form_scripts', $this->load_scripts);
+        if (! $load_scripts) {
+            return;
+        }
+
+        // load general client-side form API
+        wp_enqueue_script('mc4wp-forms-api');
+
+        // maybe load JS file for when a form was submitted over HTTP POST
+        $submitted_form_data = $this->get_submitted_form_data();
+        if ($submitted_form_data !== null) {
+            wp_enqueue_script('mc4wp-forms-submitted', mc4wp_plugin_url('assets/js/forms-submitted.js'), array( 'mc4wp-forms-api' ), MC4WP_VERSION, true);
+            wp_localize_script('mc4wp-forms-submitted', 'mc4wp_submitted_form', $submitted_form_data);
+        }
+
+        // print inline scripts
+        echo '<script>';
+        echo '(function() {';
+        include __DIR__ . '/views/js/url-fields.js';
+        echo '})();';
+        echo '</script>';
+
+        /** @ignore */
+        do_action('mc4wp_load_form_scripts');
+    }
+
+    /**
+     * Adds `defer` attribute to all form-related `<script>` elements so they do not block page rendering.
+     *
+     * @param string $tag
+     * @param string $handle
+     * @return string
+     */
+    public function add_defer_attribute($tag, $handle)
+    {
+        if (! in_array($handle, array( 'mc4wp-forms-api', 'mc4wp-forms-submitted' ), true) || stripos($tag, ' defer') !== false) {
+            return $tag;
+        }
+
+        return str_replace(' src=', ' defer src=', $tag);
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Form_AMP
+ */
+class MC4WP_Form_AMP
+{
+    /**
+     * Hook!
+     */
+    public function add_hooks()
+    {
+        add_filter('mc4wp_form_content', array( $this, 'add_response_templates' ), 10, 2);
+        add_filter('mc4wp_form_element_attributes', array( $this, 'add_amp_request' ));
+        add_filter('mc4wp_load_form_scripts', array( $this, 'suppress_scripts' ));
+    }
+
+    /**
+     * Add AMP templates for submit/success/error.
+     *
+     * @param string     $content The form content.
+     * @param MC4WP_Form $form The form object.
+     * @return string    Modified $content.
+     */
+    public function add_response_templates($content, $form)
+    {
+        if (! function_exists('amp_is_request') || ! amp_is_request()) {
+            return $content;
+        }
+
+        ob_start();
+        ?>
+        <div submitting>
+            <template type="amp-mustache">
+                <?php echo esc_html__('Submitting...', 'mailchimp-for-wp'); ?>
+            </template>
+        </div>
+        <div submit-success>
+            <template type="amp-mustache">
+                <?php
+                echo wp_kses(
+                    $form->get_message('subscribed'),
+                    array(
+                    'a' => array(),
+                    'strong' => array(),
+                    'em' => array(),
+                    )
+                );
+                ?>
+            </template>
+        </div>
+        <div submit-error>
+            <template type="amp-mustache">
+                {{message}}
+            </template>
+        </div>
+        <?php
+        $content .= ob_get_clean();
+
+        return $content;
+    }
+
+    /**
+     * Add 'action-xhr' to AMP forms.
+     *
+     * @param array $attributes Key-Value pairs of attributes output on form.
+     * @return array Modified $attributes.
+     */
+    public function add_amp_request($attributes)
+    {
+        if (function_exists('amp_is_request') && amp_is_request()) {
+            $attributes['action-xhr'] = get_rest_url(null, 'mc4wp/v1/form');
+        }
+
+        return $attributes;
+    }
+
+    /**
+     * Suppress form scripts on AMP pages.
+     *
+     * @param bool $load_scripts Whether scripts should be loaded.
+     * @return bool Modified $load_scripts.
+     */
+    public function suppress_scripts($load_scripts)
+    {
+        if (function_exists('amp_is_request') && amp_is_request()) {
+            return false;
+        }
+
+        return $load_scripts;
+    }
+}

+<?php
+
+/**
+ * This class takes care of all form related functionality
+ *
+ * Do not interact with this class directly, use `mc4wp_form` functions tagged with @access public instead.
+ *
+ * @class MC4WP_Form_Manager
+ * @ignore
+ * @access private
+*/
+class MC4WP_Form_Manager
+{
+    /**
+     * @var MC4WP_Form_Output_Manager
+     */
+    protected $output_manager;
+
+    /**
+     * @var MC4WP_Form_Listener
+     */
+    protected $listener;
+
+    /**
+     * @var MC4WP_Form_Tags
+     */
+    protected $tags;
+
+    /**
+    * @var MC4WP_Form_Previewer
+    */
+    protected $previewer;
+
+    /**
+     * @var MC4WP_Form_Asset_Manager
+     */
+    protected $assets;
+
+    /**
+     * @var MC4WP_Form_AMP
+     */
+    protected $amp_compatibility;
+
+    /**
+     * Constructor
+     */
+    public function __construct()
+    {
+        $this->output_manager    = new MC4WP_Form_Output_Manager();
+        $this->tags              = new MC4WP_Form_Tags();
+        $this->listener          = new MC4WP_Form_Listener();
+        $this->previewer         = new MC4WP_Form_Previewer();
+        $this->assets            = new MC4WP_Form_Asset_Manager();
+        $this->amp_compatibility = new MC4WP_Form_AMP();
+    }
+
+    /**
+     * Hook!
+     */
+    public function add_hooks()
+    {
+        add_action('init', array( $this, 'initialize' ));
+        add_action('widgets_init', array( $this, 'register_widget' ));
+        add_action('rest_api_init', array( $this, 'register_endpoint' ));
+
+        $this->listener->add_hooks();
+        $this->output_manager->add_hooks();
+        $this->assets->add_hooks();
+        $this->tags->add_hooks();
+        $this->previewer->add_hooks();
+        $this->amp_compatibility->add_hooks();
+    }
+
+    /**
+     * Initialize
+     */
+    public function initialize()
+    {
+        $this->register_post_type();
+        $this->register_block_type();
+    }
+
+    private function register_block_type()
+    {
+        // Bail if register_block_type does not exist (available since WP 5.0)
+        if (! function_exists('register_block_type')) {
+            return;
+        }
+
+        register_block_type(
+            'mailchimp-for-wp/form',
+            array(
+                'render_callback' => array( $this->output_manager, 'shortcode' ),
+            )
+        );
+    }
+
+    /**
+     * Register post type "mc4wp-form"
+     */
+    private function register_post_type()
+    {
+        // register post type
+        register_post_type(
+            'mc4wp-form',
+            array(
+                'labels' => array(
+                    'name'          => 'Mailchimp Sign-up Forms',
+                    'singular_name' => 'Sign-up Form',
+                ),
+                'public' => false,
+            )
+        );
+    }
+
+    /**
+     * Register our Form widget
+     */
+    public function register_widget()
+    {
+        register_widget('MC4WP_Form_Widget');
+    }
+
+    /**
+     * Register an API endpoint for handling a form.
+     */
+    public function register_endpoint()
+    {
+        register_rest_route(
+            'mc4wp/v1',
+            '/form',
+            array(
+                'methods'  => 'POST',
+                'permission_callback' => '__return_true',
+                'callback' => array( $this, 'handle_endpoint' ),
+            )
+        );
+    }
+
+    /**
+     * Process requests to the form endpoint.
+     *
+     * A listener checks every request for a form submit, so we just need to fetch the listener and get its status.
+     */
+    public function handle_endpoint()
+    {
+        $form = mc4wp_get_submitted_form();
+        if (! $form instanceof MC4WP_Form) {
+            return new WP_Error(
+                'not_found',
+                esc_html__('Resource does not exist.', 'mailchimp-for-wp'),
+                array(
+                    'status' => 404,
+                )
+            );
+        }
+
+        if ($form->has_errors()) {
+            $message_key = $form->errors[0];
+            $message     = $form->get_message($message_key);
+            return new WP_Error(
+                $message_key,
+                $message,
+                array(
+                'status' => 400,
+                )
+            );
+        }
+
+        return new WP_REST_Response(true, 200);
+    }
+
+    /**
+     * @param       $form_id
+     * @param array $config
+     * @param bool  $echo
+     *
+     * @return string
+     */
+    public function output_form($form_id, $config = array(), $echo = true)
+    {
+        return $this->output_manager->output_form($form_id, $config, $echo);
+    }
+
+    /**
+     * Gets the currently submitted form
+     *
+     * @return MC4WP_Form|null
+     */
+    public function get_submitted_form()
+    {
+        if ($this->listener->submitted_form instanceof MC4WP_Form) {
+            return $this->listener->submitted_form;
+        }
+
+        return null;
+    }
+
+    /**
+     * Return all tags
+     *
+     * @return array
+     */
+    public function get_tags()
+    {
+        return $this->tags->all();
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Form_Notice
+ *
+ * @ignore
+ * @access private
+ */
+class MC4WP_Form_Notice
+{
+    /**
+     * @var string
+     */
+    public $type = 'error';
+
+    /**
+     * @var string
+     */
+    public $text;
+
+    /**
+     * @param string $text
+     * @param string $type
+     */
+    public function __construct($text, $type = 'error')
+    {
+        $this->text = $text;
+
+        if (! empty($type)) {
+            $this->type = $type;
+        }
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->text;
+    }
+}

+<?php
+
+class MC4WP_Form_Previewer
+{
+    public function add_hooks()
+    {
+        add_action('parse_request', array( $this, 'listen' ));
+    }
+
+    public function listen()
+    {
+        if (empty($_GET['mc4wp_preview_form'])) {
+            return;
+        }
+
+        if (! current_user_can('edit_posts')) {
+            return;
+        }
+
+        show_admin_bar(false);
+        add_filter('pre_handle_404', '__return_true');
+        remove_all_actions('template_redirect');
+        add_action('template_redirect', array( $this, 'load_preview' ));
+    }
+
+    public function load_preview()
+    {
+        // clear output, some plugin or hooked code might have thrown errors by now.
+        if (ob_get_level() > 0) {
+            ob_end_clean();
+        }
+
+        $form_id = (int) $_GET['mc4wp_preview_form'];
+        status_header(200);
+
+        require __DIR__ . '/views/preview.php';
+        exit;
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Form_Tags
+ *
+ * @access private
+ * @ignore
+ */
+class MC4WP_Form_Tags extends MC4WP_Dynamic_Content_Tags
+{
+    /**
+     * @var MC4WP_Form
+     */
+    protected $form;
+
+    /**
+     * @var MC4WP_Form_Element
+     */
+    protected $form_element;
+
+    public function add_hooks()
+    {
+        add_filter('mc4wp_form_response_html', array( $this, 'replace_in_form_response' ), 10, 2);
+        add_filter('mc4wp_form_content', array( $this, 'replace_in_form_content' ), 10, 3);
+        add_filter('mc4wp_form_redirect_url', array( $this, 'replace_in_form_redirect_url' ), 10, 2);
+    }
+
+    /**
+     * Register template tags
+     */
+    public function register()
+    {
+        parent::register();
+
+        $this->tags['response'] = array(
+            'description' => __('Replaced with the form response (error or success messages).', 'mailchimp-for-wp'),
+            'callback'    => array( $this, 'get_form_response' ),
+        );
+
+        $this->tags['data'] = array(
+            'description' => sprintf(__('Data from the URL or a submitted form.', 'mailchimp-for-wp')),
+            'callback'    => array( $this, 'get_data' ),
+            'example'     => "data key='UTM_SOURCE' default='Default Source'",
+        );
+
+        $this->tags['subscriber_count'] = array(
+            'description' => __('Replaced with the number of subscribers on the selected list(s)', 'mailchimp-for-wp'),
+            'callback'    => array( $this, 'get_subscriber_count' ),
+        );
+    }
+
+
+    public function replace_in_form_content($string, MC4WP_Form $form, MC4WP_Form_Element $element = null)
+    {
+        $this->form         = $form;
+        $this->form_element = $element;
+
+        $string = $this->replace($string);
+        return $string;
+    }
+
+    public function replace_in_form_response($string, MC4WP_Form $form)
+    {
+        $this->form = $form;
+
+        $string = $this->replace($string);
+        return $string;
+    }
+
+    public function replace_in_form_redirect_url($string, MC4WP_Form $form)
+    {
+        $this->form = $form;
+        $string     = $this->replace_in_url($string);
+        return $string;
+    }
+
+    /**
+     * Returns the number of subscribers on the selected lists (for the form context)
+     *
+     * @return int
+     */
+    public function get_subscriber_count()
+    {
+        $mailchimp = new MC4WP_MailChimp();
+        $count     = $mailchimp->get_subscriber_count($this->form->get_lists());
+        return number_format($count);
+    }
+
+    /**
+     * Returns the form response
+     *
+     * @return string
+     */
+    public function get_form_response()
+    {
+        if ($this->form_element instanceof MC4WP_Form_Element) {
+            return $this->form_element->get_response_html();
+        }
+
+        return '';
+    }
+
+    /**
+     * Gets data value from GET or POST variables.
+     *
+     * @param array $args
+     * @return string
+     */
+    public function get_data(array $args = array())
+    {
+        if (empty($args['key'])) {
+            return '';
+        }
+
+        $default = isset($args['default']) ? $args['default'] : '';
+        $key     = $args['key'];
+
+        $data  = array_merge($_GET, $_POST);
+        $value = isset($data[ $key ]) ? $data[ $key ] : $default;
+
+        // turn array into readable value
+        if (is_array($value)) {
+            $value = array_filter($value);
+            $value = join(', ', $value);
+        }
+
+        return esc_html($value);
+    }
+}

+<?php
+
+/**
+ * Class MC4WP_Form_Output_Manager
+ *
+ * @ignore
+ * @access private
+ */
+class MC4WP_Form_Output_Manager
+{
+    /**
+     * @var int The # of forms outputted
+     */
+    public $count = 0;
+
+    /**
+     * @const string
+     */
+    const SHORTCODE = 'mc4wp_form';
+
+    /**
+     * Add hooks
+     */
+    public function add_hooks()
+    {
+        // enable shortcodes in form content
+        add_filter('mc4wp_form_content', 'do_shortcode');
+        add_action('init', array( $this, 'register_shortcode' ));
+    }
+
+    /**
+     * Registers the [mc4wp_form] shortcode
+     */
+    public function register_shortcode()
+    {
+        add_shortcode(self::SHORTCODE, array( $this, 'shortcode' ));
+    }
+
+    /**
+     * @param array $attributes
+     * @param string $content
+     * @return string
+     */
+    public function shortcode($attributes = array(), $content = '')
+    {
+        $default_attributes = array(
+            'id'            => '',
+            'lists'         => '',
+            'email_type'    => '',
+            'element_id'    => '',
+            'element_class' => '',
+        );
+
+        $attributes = shortcode_atts(
+            $default_attributes,
+            $attributes,
+            self::SHORTCODE
+        );
+
+        $config = array(
+            'element_id'    => $attributes['element_id'],
+            'lists'         => $attributes['lists'],
+            'email_type'    => $attributes['email_type'],
+            'element_class' => $attributes['element_class'],
+        );
+
+        return $this->output_form($attributes['id'], $config, false);
+    }
+
+    /**
+     * @param int   $id
+     * @param array $config
+     * @param bool $echo
+     *
+     * @return string
+     */
+    public function output_form($id = 0, $config = array(), $echo = true)
+    {
+        try {
+            $form = mc4wp_get_form($id);
+        } catch (Exception $e) {
+            if (current_user_can('manage_options')) {
+                return sprintf('<strong>Mailchimp for WordPress error:</strong> %s', $e->getMessage());
+            }
+
+            return '';
+        }
+
+        ++$this->count;
+
+        // set a default element_id if none is given
+        if (empty($config['element_id'])) {
+            $config['element_id'] = 'mc4wp-form-' . $this->count;
+        }
+
+        $form_html = $form->get_html($config['element_id'], $config);
+
+        try {
+            // start new output buffer
+            ob_start();
+
+            /**
+             * Runs just before a form element is outputted.
+             *
+             * @since 3.0
+             *
+             * @param MC4WP_Form $form
+             */
+            do_action('mc4wp_output_form', $form);
+
+            // output the form (in output buffer)
+            echo $form_html;
+
+            // grab all contents in current output buffer & then clean + end it.
+            $html = ob_get_clean();
+        } catch (Error $e) {
+            $html = $form_html;
+        }
+
+        // echo content if necessary
+        if ($echo) {
+            echo $html;
+        }
+
+        return $html;
+    }
+}