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   1  <?php
   2  abstract class MP_newsletter_scheduler_ extends MP_newsletter_
   3  {
   4      public $args = 'scheduler';
   5      public static $delta = 1;
   6  
   7  	function __construct( $description )
   8      {
   9          parent::__construct( $description );
  10  
  11          add_filter( "MailPress_newsletter_scheduler_{$this->id}_schedule",    array( $this, 'schedule' ), 8, 1 );
  12      }
  13  
  14  	function schedule( $newsletter ) { $this->newsletter = $newsletter; return false; }
  15  
  16  	function schedule_single_event( $timestamp, $event = 'mp_process_newsletter' )
  17      {
  18          if ( is_string( $timestamp ) )
  19          {
  20              $date = DateTime::createFromFormat( 'Y-m-d H:i:s', $timestamp, wp_timezone() );
  21              $timestamp = $date->getTimestamp();
  22          }
  23  
  24          $timestamp   += self::$delta;
  25          self::$delta += 1;
  26  
  27          wp_schedule_single_event( $timestamp, $event, array( 'args' => array( 'newsletter' => $this->newsletter ) ) );
  28  
  29          return MP_Newsletter_schedulers::schedule_report( $this->newsletter, $timestamp, $this->id );
  30      }
  31  }