<?php
/**
 * WooCommerce Customer/Order CSV Export
 *
 * This source file is subject to the GNU General Public License v3.0
 * that is bundled with this package in the file license.txt.
 * It is also available through the world-wide-web at this URL:
 * http://www.gnu.org/licenses/gpl-3.0.html
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@skyverge.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade WooCommerce Customer/Order CSV Export to newer
 * versions in the future. If you wish to customize WooCommerce Customer/Order CSV Export for your
 * needs please refer to http://docs.woothemes.com/document/ordercustomer-csv-exporter/
 *
 * @package     WC-Customer-Order-CSV-Export/Generator
 * @author      SkyVerge
 * @copyright   Copyright (c) 2012-2016, SkyVerge, Inc.
 * @license     http://www.gnu.org/licenses/gpl-3.0.html GNU General Public License v3.0
 */

defined( 'ABSPATH' ) or exit;

/**
 * Customer/Order CSV Export Cron Class
 *
 * Adds custom schedule and schedules the export event
 *
 * @since 3.0
 */
class WC_Customer_Order_CSV_Export_Cron {


	/**
	 * Setup hooks and filters specific to WP-cron functions
	 *
	 * @since 3.0
	 */
	public function __construct() {

		// Add custom schedule, e.g. every 10 minutes
		add_filter( 'cron_schedules', array( $this, 'add_auto_export_schedule' ) );

		// Schedule auto-update events if they don't exist, run in both frontend and backend so events are still scheduled when an admin reactivates the plugin
		add_action( 'init', array( $this, 'add_scheduled_export' ) );

		// Trigger export + upload of non-exported orders, wp-cron fires this action on the given recurring schedule
		add_action( 'wc_customer_order_csv_export_auto_export_orders', array( $this, 'auto_export_orders' ) );

		$this->exports_enabled = ( 'disabled' != get_option( 'wc_customer_order_csv_export_auto_export_method' ) );
	}


	/**
	 * If automatic exports are enabled, add the custom interval (e.g. every 15 minutes) set on the admin settings page
	 *
	 * @since 3.0
	 * @param array $schedules WP-Cron schedules array
	 * @return array $schedules now including our custom schedule
	 */
	public function add_auto_export_schedule( $schedules ) {

		if ( $this->exports_enabled ) {

			$export_interval = get_option( 'wc_customer_order_csv_export_auto_export_interval' );

			if ( $export_interval ) {

				$schedules['wc_customer_order_csv_export_auto_export_interval'] = array(
					'interval' => (int) $export_interval * 60,
					'display'  => sprintf( __( 'Every %d minutes', 'woocommerce-customer-order-csv-export' ), (int) $export_interval )
				);
			}
		}

		return $schedules;
	}


	/**
	 * If automatic exports are enabled, add the event if not already scheduled
	 *
	 * This performs a `do_action( 'wc_customer_order_csv_export_auto_export_orders' )` on our custom schedule
	 *
	 * @since 3.0
	 */
	public function add_scheduled_export() {

		if ( $this->exports_enabled ) {

			// Schedule export
			if ( ! wp_next_scheduled( 'wc_customer_order_csv_export_auto_export_orders' ) ) {

				$start_time = get_option( 'wc_customer_order_csv_export_auto_export_start_time' );
				$curr_time  = current_time( 'timestamp' );

				if ( $start_time ) {

					if ( $curr_time > strtotime( 'today ' . $start_time, $curr_time ) ) {

						$start_timestamp = strtotime( 'tomorrow ' . $start_time, $curr_time ) - ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );

					} else {

						$start_timestamp = strtotime( 'today ' . $start_time, $curr_time ) - ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );

					}

				} else {

					$export_interval = get_option( 'wc_customer_order_csv_export_auto_export_interval' );

					$start_timestamp = strtotime( "now +{$export_interval} minutes" );
				}

				wp_schedule_event( $start_timestamp, 'wc_customer_order_csv_export_auto_export_interval', 'wc_customer_order_csv_export_auto_export_orders' );

			}

		}
	}

	/**
	 * Exports any non-exported orders to CSV and performs the chosen action (upload, HTTP POST, email)
	 *
	 * @since 3.0
	 */
	public function auto_export_orders() {

		$order_statuses = (array) get_option( 'wc_customer_order_csv_export_auto_export_statuses' );

		/**
		 * Query order IDs to export
		 *
		 * By default we get un-exported order IDs,
		 * but this filter can change the query behavior
		 *
		 * @since 3.11.2
		 * @param array $query_args WP_Query args to fetch order IDs to export automatically
		 * @param array $order_statuses Order statuses to export
		 */
		$query_args = apply_filters( 'wc_customer_order_csv_export_auto_export_order_query_args', array(
			'fields'      => 'ids',
			'post_type'   => 'shop_order',
			'post_status' => empty( $order_statuses ) ? 'any' : $order_statuses,
			'nopaging'    => true,
			'meta_key'    => '_wc_customer_order_csv_export_is_exported',
			'meta_value'  => 0
		), $order_statuses );

		$query = new WP_Query( $query_args );

		if ( ! empty( $query->posts ) ) {

			// Export the queried orders
			$export = new WC_Customer_Order_CSV_Export_Handler( $query->posts );

			$export->export_via( get_option( 'wc_customer_order_csv_export_auto_export_method' ) );
		}

		/**
		 * Auto-Export Action.
		 *
		 * Fired when orders are auto-exported
		 *
		 * @since 3.0
		 * @param array $order_ids order IDs that were exported
		 */
		do_action( 'wc_customer_order_csv_export_orders_exported', $query->posts );
	}


	/**
	 * Clear scheduled events upon deactivation
	 *
	 * @since 3.1
	 */
	public function clear_scheduled_export() {

		wp_clear_scheduled_hook( 'wc_customer_order_csv_export_auto_export_orders' );
	}


} // end \WC_Customer_Order_CSV_Export_Cron class