File includes/wcal_admin

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<?php
// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * It will display the admin notices for the pro version.
 *
 * @author  Tyche Softwares
 * @package Abandoned-Cart-Lite-for-WooCommerce/Admin/Admin-Notice
 */

class Wcal_Admin_Notice {

    /**
     * Show a DB Update Notice when upgrading from 4.7 to latest version
     * 
     * @since 4.8
     * 
     * @hook admin_notices
     */
    public static function wcal_show_db_update_notice(){

        if( isset( $_GET['ac_update'] ) && $_GET['ac_update'] == 'email_templates' ){
            return;
        }

        global $wpdb;

        $query_status = "SHOW FULL COLUMNS FROM " . $wpdb->prefix . "ac_email_templates_lite" . " WHERE Field = 'subject' OR Field = 'body'" ;

        $results = $wpdb->get_results( $query_status );

        foreach ( $results as $key => $value) {
            if ( $value->Collation !== 'utf8mb4_unicode_ci' ) {
                printf( __( '<div id="wcal_update" class="updated woocommerce-message" style="padding:15px;"><span>We need to update your email template database for some improvements. Please take a backup of your databases for your peice of mind</span><span class="submit"><a href="%s" class="button-primary" style="float:right;">Update</a></span></div>', 'woocommerce-abandoned-cart' ), 'admin.php?page=woocommerce_ac_page&action=listcart&ac_update=email_templates' );
                break;
            }
        }
    }
}

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