product-gtin-ean-upc-isbn-for-woocommerce.php
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<?php
/**
* /lib/compatibility/product-gtin-ean-upc-isbn-for-woocommerce.php.php
*
* Adds Product GTIN (EAN, UPC, ISBN) for WooCommerce support for Relevanssi.
*
* @package Relevanssi
* @author Mikko Saari
* @license https://wordpress.org/about/gpl/ GNU General Public License
* @see https://www.relevanssi.com/
*/
add_action( 'pre_option_wpm_pgw_search_by_code', 'relevanssi_disable_gtin_code' );
add_filter( 'relevanssi_index_custom_fields', 'relevanssi_add_wpm_gtin_code' );
add_filter( 'option_relevanssi_index_fields', 'relevanssi_wpm_pgw_fix_none_setting' );
/**
* Disables the 'wpm_pgw_search_by_code' option.
*
* If this option is enabled, it will break Relevanssi search when there's a
* match for the code.
*
* @return string 'no'.
*/
function relevanssi_disable_gtin_code() {
return 'no';
}
/**
* Adds the `_wpm_gtin_code` to the list of indexed custom fields.
*
* @param array|boolean $fields An array of custom fields to index, or false.
*
* @return array An array of custom fields, including `_wpm_gtin_code`.
*/
function relevanssi_add_wpm_gtin_code( $fields ) {
if ( ! is_array( $fields ) ) {
$fields = array();
}
if ( ! in_array( '_wpm_gtin_code', $fields, true ) ) {
$fields[] = '_wpm_gtin_code';
}
return $fields;
}
/**
* Makes sure the GTIN code is included in the index, even when the custom field
* setting is set to 'none'.
*
* @param string $value The custom field indexing setting value. The parameter
* is ignored, Relevanssi disables this filter and then checks the option to
* see what the value is.
*
* @return string If value is undefined, it's set to '_wpm_gtin_code'.
*/
function relevanssi_wpm_pgw_fix_none_setting( $value ) {
if ( ! $value ) {
$value = '_wpm_gtin_code';
}
return $value;
}