/*
Plugin Name: Purge Cache
Description: Adds a button to the WordPress dashboard to clear the object cache
*/

add_action( 'admin_bar_menu', 'add_purge_cache_button', 999 );

function add_purge_cache_button( $wp_admin_bar ) {
    if ( ! current_user_can( 'manage_options' ) ) {
        return;
    }

    $args = array(
        'id'    => 'purge-cache',
        'title' => 'Purge Cache',
        'href'  => '#',
        'meta'  => array( 'class' => 'purge-cache' )
    );
    $wp_admin_bar->add_node( $args );
}

add_action( 'admin_footer', 'add_purge_cache_script' );

function add_purge_cache_script() {
    if ( ! current_user_can( 'manage_options' ) ) {
        return;
    }
    ?>
    <script>
    jQuery(document).ready(function($) {
        $('#wp-admin-bar-purge-cache').click(function() {
            if (confirm('Are you sure you want to purge the cache?')) {
                $.ajax({
                    url: '<?php echo admin_url( 'admin-ajax.php' ); ?>',
                    data: {
                        action: 'purge_cache',
                    },
                    success: function() {
                        alert('Cache purged successfully!');
                    },
                    error: function() {
                        alert('An error occurred while purging the cache.');
                    }
                });
            }
        });
    });
    </script>
    <?php
}

add_action( 'wp_ajax_purge_cache', 'purge_cache_callback' );

function purge_cache_callback() {
    global $wp_object_cache;
    if ( ! current_user_can( 'manage_options' ) ) {
        wp_die();
    }

    wp_cache_flush();

    wp_die();
}