wpdk-cron.php

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<?php

class WPDKCronSchedules {

  const HALF_HOUR   = 'wpdk_half_hour';
  const TWO_MINUTES = 'wpdk_two_minutes';

  public static function init()
  {
    static $instance = null;
    if ( is_null( $instance ) ) {
      $instance = new WPDKCronSchedules();
    }
    return $instance;
  }

  public function __construct()
  {
    // Custom periodic interval
    add_filter( 'cron_schedules', array( $this, 'cron_schedules' ) );
  }

  public function cron_schedules( $schedules )
  {
    $new_schedules = array(
      self::HALF_HOUR   => array(
        'interval' => HOUR_IN_SECONDS / 2,
        'display'  => __( 'Half hour', WPDK_TEXTDOMAIN )
      ),
      self::TWO_MINUTES => array(
        'interval' => MINUTE_IN_SECONDS * 2,
        'display'  => __( 'Two minutes', WPDK_TEXTDOMAIN )
      ),
    );

    return array_merge( $schedules, $new_schedules );
  }

}


class WPDKCronController {

  public $cron = array();

  public function __construct()
  {
    $this->cron = _get_cron_array();
  }

  public static function remove( $name )
  {
    $name = sanitize_title( $name );

    // Get time of next scheduled run
    $timestamp = wp_next_scheduled( $name );

    // Unschedule custom action hook
    wp_unschedule_event( $timestamp, $name );
  }

  public static function removeAll( $name )
  {
    $name = sanitize_title( $name );
    wp_clear_scheduled_hook( $name );
  }

}


class WPDKCron {

  public $name = '';
  public $timestamp = 0;
  public $recurrence = 0;

  public function __construct( $name, $timestap = false, $recurrence = 0 )
  {
    $this->name       = sanitize_title( $name );
    $this->timestamp  = empty( $timestap ) ? time() : $timestap;
    $this->recurrence = $recurrence;

    // Add action
    add_action( $this->name, array( $this, 'cron' ) );

    // If this cron jobs is not scheduled then add to the WP list
    if ( !wp_next_scheduled( $this->name ) ) {

      // Recurring
      if ( empty( $timestap ) && !empty( $recurrence ) ) {
        wp_schedule_event( time(), $recurrence, $this->name );
      }
      // Single event
      elseif ( !empty( $timestap ) ) {
        wp_schedule_single_event( $timestap, $this->name );
      }
    }
  }

  public function cron( )
  {
    // Override
  }

  public function remove()
  {
    WPDKCronController::remove( $this->name );
  }

}


class WPDKRecurringCron extends WPDKCron {

  public function __construct( $name, $recurrence = 0 )
  {
    parent::__construct( $name, false, $recurrence );
  }
}

class WPDKSingleCron extends WPDKCron {

  public function __construct( $name, $timestap )
  {
    parent::__construct( $name, $timestap );
  }

}