<?php
//$Id$

/**
 * @file
 *
 * Subscriptions to events.
 *
 * Subscriptions_events extends the subscription module to allow users to
 * subscribe to event nodes.
 */

/**
 * Implementation of hook_form_alter().
 * Add the !event_... variable explanations to the Mail Editor forms.
 *
 * @ingroup hooks
 */
function subscriptions_event_form_alter($form_id, &$form) {
  if ($form_id == 'mail_edit_form' && substr($form['mailkey']['#value'], 0, 13) == 'subscriptions') {
    if (!isset($form['addon_help'])) {
      $form['addon_help'] = array(
        '#variables' => array(),
        '#theme' => 'mail_edit_variables',
        '#weight' => 35.5,
      );
    }
    $form['addon_help']['#variables'] += array(
      '!event_start' => t('The event start timestamp.'),
      '!event_end' => t('The event end timestamp.'),
    );
  }
}

/**
 * Implementation of hook_subscriptions_add_mailvars().
 * Add the !event_... variables.
 *
 * @ingroup hooks
 */
function subscriptions_event_subscriptions_get_mailvars($node) {
  if (isset($node->event)) {
    $mailvars = array();
    $has_time = $node->event['has_time'] && !($node->event['start_exploded']['hour'] == 0 && $node->event['start_exploded']['minute'] == 0 && $node->event['start_exploded']['second'] == 0 && $node->event['end_exploded']['hour'] == 23 && $node->event['end_exploded']['minute'] == 59 && $node->event['end_exploded']['second'] == 0);
    $start = $node->event['start_format'];
    if ($has_time) {
      $mailvars['!event_start'] = $start;
    }
    else {
      $mailvars['!event_start'] = trim(substr($start, 0, strlen($start) - strlen($node->event['start_time_format'])));
    }
    if ($node->event['has_end_date'] || ($node->event['start_exploded']['year'] != $node->event['end_exploded']['year'] || $node->event['start_exploded']['month'] != $node->event['end_exploded']['month'] || $node->event['start_exploded']['day'] != $node->event['end_exploded']['day'])) {
      $end = $node->event['end_format'];
      if ($has_time) {
        $mailvars['!event_end'] = $end;
      }
      else {
        $mailvars['!event_end'] = trim(substr($end, 0, strlen($end) - strlen($node->event['end_time_format'])));
      }
    }
    return $mailvars;
  }
}