<?php
/**
 * Cron class.
 *
 * @package WPZinc\Social
 * @author WP Zinc
 */

namespace WPZinc\Social;

/**
 * Functions to schedule, reschedule and unschedule events with WordPress' Cron for
 * - Log Cleanup (old log entries that are no longer needed)
 * - Media Cleanup (images auto generated by the Plugin that are no longer needed)
 *
 * @package  WPZinc\Social
 * @author   WP Zinc
 * @version  3.7.2
 */
class Cron {

	/**
	 * Holds the base class object.
	 *
	 * @since   3.7.2
	 *
	 * @var     object
	 */
	public $base;

	/**
	 * Constructor
	 *
	 * @since   3.7.2
	 *
	 * @param   object $base    Base Plugin Class.
	 */
	public function __construct( $base ) {

		// Store base class.
		$this->base = $base;

	}

	/**
	 * Schedules the log cleanup event in the WordPress CRON on a daily basis
	 *
	 * @since   3.9.8
	 */
	public function schedule_log_cleanup_event() {

		// Bail if the preserve logs settings is indefinite.
		if ( ! $this->base->get_class( 'settings' )->get_setting( 'log', '[preserve_days]' ) ) {
			return;
		}

		// Bail if the scheduled event already exists.
		$scheduled_event = $this->get_log_cleanup_event();
		if ( $scheduled_event !== false ) {
			return;
		}

		// Schedule event.
		$scheduled_date_time = gmdate( 'Y-m-d', strtotime( '+1 day' ) ) . ' 00:00:00';
		wp_schedule_event( strtotime( $scheduled_date_time ), 'daily', $this->base->plugin->filter_name . '_log_cleanup_cron' );

	}

	/**
	 * Unschedules the log cleanup event in the WordPress CRON.
	 *
	 * @since   3.9.8
	 */
	public function unschedule_log_cleanup_event() {

		wp_clear_scheduled_hook( $this->base->plugin->filter_name . '_log_cleanup_cron' );

	}

	/**
	 * Reschedules the log cleanup event in the WordPress CRON, by unscheduling
	 * and scheduling it.
	 *
	 * @since   3.9.8
	 */
	public function reschedule_log_cleanup_event() {

		$this->unschedule_log_cleanup_event();
		$this->schedule_log_cleanup_event();

	}

	/**
	 * Returns the scheduled log cleanup event, if it exists
	 *
	 * @since   3.9.8
	 */
	public function get_log_cleanup_event() {

		return wp_get_schedule( $this->base->plugin->filter_name . '_log_cleanup_cron' );

	}

	/**
	 * Returns the scheduled log cleanup event's next date and time to run, if it exists
	 *
	 * @since   3.9.8
	 *
	 * @param   mixed $format     Format Timestamp (false | php date() compat. string).
	 */
	public function get_log_cleanup_event_next_scheduled( $format = false ) {

		// Get timestamp for when the event will next run.
		$scheduled = wp_next_scheduled( $this->base->plugin->filter_name . '_log_cleanup_cron' );

		// If no timestamp or we're not formatting the result, return it now.
		if ( ! $scheduled || ! $format ) {
			return $scheduled;
		}

		// Return formatted date/time.
		return gmdate( $format, $scheduled );
	}

	/**
	 * Runs the log cleanup CRON event
	 *
	 * @since   3.9.8
	 */
	public function log_cleanup() {

		// Bail if the preserve logs settings is indefinite.
		// We shouldn't ever call this function if this is the case, but it's a useful sanity check.
		$preserve_days = $this->base->get_class( 'settings' )->get_setting( 'log', '[preserve_days]' );
		if ( ! $preserve_days ) {
			return;
		}

		// Define the date cutoff.
		$date_time = gmdate( 'Y-m-d H:i:s', strtotime( '-' . $preserve_days . ' days' ) );
		// Delete log entries older than the date.
		$this->base->get_class( 'log' )->delete_by_request_sent_cutoff( $date_time );

	}

	/**
	 * Schedules the media cleanup event in the WordPress CRON on a daily basis
	 *
	 * @since   4.2.0
	 */
	public function schedule_media_cleanup_event() {

		// Bail if the scheduled event already exists.
		$scheduled_event = $this->get_media_cleanup_event();
		if ( $scheduled_event !== false ) {
			return;
		}

		// Schedule event.
		$scheduled_date_time = gmdate( 'Y-m-d', strtotime( '+1 day' ) ) . ' 01:00:00';
		wp_schedule_event( strtotime( $scheduled_date_time ), 'daily', $this->base->plugin->filter_name . '_media_cleanup_cron' );

	}

	/**
	 * Unschedules the media cleanup event in the WordPress CRON.
	 *
	 * @since   4.2.0
	 */
	public function unschedule_media_cleanup_event() {

		wp_clear_scheduled_hook( $this->base->plugin->filter_name . '_media_cleanup_cron' );

	}

	/**
	 * Reschedules the media cleanup event in the WordPress CRON, by unscheduling
	 * and scheduling it.
	 *
	 * @since   4.2.0
	 */
	public function reschedule_media_cleanup_event() {

		$this->unschedule_media_cleanup_event();
		$this->schedule_media_cleanup_event();

	}

	/**
	 * Returns the scheduled media cleanup event, if it exists
	 *
	 * @since   4.2.0
	 */
	public function get_media_cleanup_event() {

		return wp_get_schedule( $this->base->plugin->filter_name . '_media_cleanup_cron' );

	}

	/**
	 * Returns the scheduled media cleanup event's next date and time to run, if it exists
	 *
	 * @since   4.2.0
	 *
	 * @param   mixed $format     Format Timestamp (false | php date() compat. string).
	 */
	public function get_media_cleanup_event_next_scheduled( $format = false ) {

		// Get timestamp for when the event will next run.
		$scheduled = wp_next_scheduled( $this->base->plugin->filter_name . '_media_cleanup_cron' );

		// If no timestamp or we're not formatting the result, return it now.
		if ( ! $scheduled || ! $format ) {
			return $scheduled;
		}

		// Return formatted date/time.
		return gmdate( $format, $scheduled );
	}

	/**
	 * Unschedules the refresh token event in the WordPress CRON.
	 *
	 * @since   6.2.0
	 */
	public function unschedule_refresh_token_event() {

		wp_clear_scheduled_hook( $this->base->plugin->filter_name . '_refresh_token_cron' );

	}
}