ajax-action-wrapper.js
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var AjawV1 = window.AjawV1 || {};
AjawV1.AjaxAction = (function () {
"use strict";
function AjawAjaxAction(action, properties) {
this.action = action;
this.ajaxUrl = properties['ajaxUrl'];
this.nonce = properties['nonce'];
this.requiredMethod = (typeof properties['method'] !== 'undefined') ? properties['method'] : null;
}
/**
* Send a POST request.
*
* @param {Object} params
* @param {Function} success
* @param {Function} [error]
*/
AjawAjaxAction.prototype.post = function (params, success, error) {
return this.request(params, success, error, 'POST');
};
/**
* Send a GET request.
*
* @param {Object} params
* @param {Function} success
* @param {Function} [error]
*/
AjawAjaxAction.prototype.get = function(params, success, error) {
return this.request(params, success, error, 'GET');
};
/**
* Send an AJAX request using the specified HTTP method.
*
* @param {Object} params
* @param {Function} success
* @param {Function} [error]
* @param {String} [method]
*/
AjawAjaxAction.prototype.request = function(params, success, error, method) {
if (typeof params === 'function') {
//It looks like "params" was omitted and the first argument is actually the success callback.
//Shift all arguments left one step. The reverse order is due to argument binding shenanigans.
method = arguments[2];
error = arguments[1];
success = arguments[0];
params = {};
}
if (typeof params === 'undefined') {
params = {};
} else if (typeof params !== 'object') {
//While jQuery accepts request data in object and string form, this library only supports objects.
throw 'Data that\'s to be sent to the server must be an object, not ' + (typeof params);
}
if (typeof method === 'undefined') {
method = this.requiredMethod || 'POST';
}
if (this.requiredMethod && (method !== this.requiredMethod)) {
throw 'Wrong HTTP method. This action requires ' + this.requiredMethod;
}
//noinspection JSUnusedGlobalSymbols
return jQuery.ajax(
this.ajaxUrl,
{
method: method,
data: this.prepareRequestParams(params),
success: function(data, textStatus, jqXHR) {
if (success) {
success(data, textStatus, jqXHR);
}
},
error: function(jqXHR, textStatus, errorThrown) {
var data = jqXHR.responseText;
if (typeof jqXHR['responseJSON'] !== 'undefined') {
data = jqXHR['responseJSON'];
} else if (typeof jqXHR['responseXML'] !== 'undefined') {
data = jqXHR['responseXML'];
}
if (error) {
error(data, textStatus, jqXHR, errorThrown);
}
}
}
);
};
AjawAjaxAction.prototype.prepareRequestParams = function(params) {
if (params === null) {
params = {};
}
params['action'] = this.action;
if (this.nonce !== null) {
params['_ajax_nonce'] = this.nonce;
}
return params;
};
return AjawAjaxAction;
}());
AjawV1.actionRegistry = (function() {
var actions = {};
return {
/**
*
* @param {String} actionName
* @return {AjawAjaxAction}
*/
get: function(actionName) {
if (actions.hasOwnProperty(actionName)) {
return actions[actionName];
}
return null;
},
add: function(actionName, properties) {
actions[actionName] = new AjawV1.AjaxAction(actionName, properties);
}
}
})();
/**
* Get a registered action wrapper.
*
* @param {string} action
* @return {AjawAjaxAction|null}
*/
AjawV1.getAction = function(action) {
return this.actionRegistry.get(action);
};