Displays Assigned Cleverness todos in WP Full Calendar

Cleverness-Todos-in-WP-Full-Calendar

/**
 * Displays Assigned Cleverness todos in WP Full Calendar
 *
 * @return $items
 * @author Mohsin Rasool
 **/

add_filter( 'wpfc_events', 'wpfc_add_tasks' );
add_filter( 'wpfc_ajax', 'wpfc_add_tasks' );

function wpfc_add_tasks($items) {

  foreach ($items as $key => $item) {
    $items[$key]['color'] = '#006400';
    $items[$key]['borderColor'] = '#006400';
  }

  $current_user = wp_get_current_user();

  $args = array(  
          'post_type' => 'todo',
          'meta_query' => array(
            array(
              'key' => '_assign', 
              'value' => $current_user->ID
            ),
            array(
              'key' => '_status', 
              'value' => '0'
            ),
            array(
              'relation' => 'AND',
              array(
                'key' => '_deadline', 
                'value' => $_GET['start'],
                'compare' => '>='
              ),
              array(
                'key' => '_deadline', 
                'value' => $_GET['end'],
                'compare' => '<='
              ),
            ),
          ),

        );

  $todos = new WP_Query($args);

  while ($todos->have_posts()) {
    global $post;
    $todos->the_post();


    $post_timestamp = get_post_meta(get_the_ID(), '_deadline',true);

    $items[] = array (
      "allDay" => true,
      "title" => get_the_title(), 
      "color" => '#1e285c', 
      "start" => date('Y-m-d\TH:i:s', $post_timestamp), 
      "end" => date('Y-m-d\TH:i:s', $post_timestamp), 
      "url" => '#', 
      'post_id' => get_the_ID()
    );
    
  }
  return $items;
}