felixarntz/wp-gcs-offload

<?php
/**
 * WPGCSOffload\Core\Core class
 *
 * @package WPGCSOffload
 * @subpackage Core
 * @author Felix Arntz <felix-arntz@leaves-and-love.net>
 * @since 0.5.0
 */

namespace WPGCSOffload\Core;

use WPGCSOffload\Admin\Settings as Settings;

if ( ! defined( 'ABSPATH' ) ) {
    die();
}

if ( ! class_exists( 'WPGCSOffload\Core\Core' ) ) {
    /**
     * This class handles the plugin's main functionality.
     *
     * @since 0.5.0
     */
    class Core {
        private static $instance = null;

        public static function instance() {
            if ( null === self::$instance ) {
                self::$instance = new self();
            }

            return self::$instance;
        }

        private function __construct() {
            // empty
        }

        public function run() {
            $this->setup_client();
            $this->setup_url_fixer();
            $this->setup_sync_assistant();
            $this->setup_ajax_handler();
        }

        public function setup_client() {
            $settings = Settings::instance();

            $client = Client::instance();
            $client->set_authentication_key( $settings->get_setting( 'authentication_key' ) );
            $client->set_bucket_name( $settings->get_setting( 'bucket_name' ) );
        }

        public function setup_url_fixer() {
            $url_fixer = URLFixer::instance();

            add_filter( 'image_downsize', array( $url_fixer, 'image_downsize' ), 10, 3 );
            add_filter( 'wp_get_attachment_url', array( $url_fixer, 'wp_get_attachment_url' ), 10, 2 );
            add_filter( 'attachment_url_to_postid', array( $url_fixer, 'attachment_url_to_postid' ), 10, 2 );
        }

        public function setup_sync_assistant() {
            if ( ! Client::instance()->is_configured() ) {
                return;
            }

            $sync_assistant = SyncAssistant::instance();

            if ( Settings::instance()->get_setting( 'sync_addition' ) ) {
                add_filter( 'wp_update_attachment_metadata', array( $sync_assistant, 'sync_addition' ), 10, 2 );
            }
            if ( Settings::instance()->get_setting( 'sync_deletion' ) ) {
                add_action( 'delete_attachment', array( $sync_assistant, 'sync_deletion' ), 10, 1 );
            }
            if ( Settings::instance()->get_setting( 'remote_only' ) ) {
                add_action( 'wpgcso_uploaded_to_cloud_storage', array( $sync_assistant, 'delete_local_on_upload' ), 10, 3 );
            }

            // the following hooks prevent accidental removing of files
            add_action( 'wpgcso_delete_from_cloud_storage', array( $sync_assistant, 'store_local_on_remote_only_delete' ), 10, 3 );
            add_action( 'wpgcso_delete_local_file', array( $sync_assistant, 'store_remote_on_local_only_delete' ), 10, 3 );
        }

        public function setup_ajax_handler() {
            $ajax_handler = AjaxHandler::instance();

            add_action( 'admin_init', array( $ajax_handler, 'add_actions' ) );
        }
    }
}