<?php
// $Id: notifications_autosubscribe.module,v 1.2.2.3.2.5.2.1 2009-04-19 11:02:20 jareyero Exp $
/**
 * @file
 *   Notifications Autosubscribe module.
 * 
 * Allows users to automatically subscribe to threads they create or comment on. This module depends on
 * and needs to run before notifications_content module (weight = 100) for it to work properly.
 */

/**
 * Implementation of hook_nodeapi()
 */
function notifications_autosubscribe_nodeapi(&$node, $op, $arg = 0) {
  global $user;
  
  if ($user->uid && $op == 'insert' && $node->uid == $user->uid) {
    notifications_autosubscribe($user, 'thread', 'node', 'nid', $node->nid);
  }
}

/**
 * Implementation of hook_comment().
 */
function notifications_autosubscribe_comment($comment, $op) {
  global $user;
  
  // $comment can be an object or an array.
  $comment = (object)$comment;

  if ($user->uid && $op == 'insert' && $comment->uid == $user->uid) {
    notifications_autosubscribe($user, 'thread', 'node', 'nid', $comment->nid); 
  }
}

/**
 * Subscribes users to content they post, if not already subscribed
 *
 * @param $account
 *   User account to subscribe
 * @param $type
 *   Subscription type
 * @param $event type
 *   Event type
 * @param $field
 *   String, field that subscription depends on. ie 'nid'.
 * @param $value
 *   Int, value of $field that triggers subscription.
 *
 */
function notifications_autosubscribe($account, $type, $event_type, $field, $value) {
  // if user has auto subscribe enabled and he's not already subscribed
  if (notifications_user_setting('auto', $account) && !notifications_user_get_subscriptions($account->uid, $event_type, $field, $value)) {
    $subscription = array(
      'uid' => $account->uid,
      'type' => $type,
      'event_type' => $event_type,
      'fields' => array($field => $value),
    );
    notifications_save_subscription($subscription);    
  }
}

/**
 * Implementation of hook_form_alter()
 *
 * Adds autosubscribe checkbox to user edit form.
 */
function notifications_autosubscribe_form_alter(&$form, $form_state, $form_id) {
  switch ($form_id) {
    case 'user_edit':
    case 'user_profile_form':
      if (isset($form['messaging'])) {
        $form['messaging']['notifications_auto'] = array(
          '#type'          => 'checkbox',
          '#title'         => t('Autosubscribe'),
          '#default_value' => notifications_user_setting('auto', $form['_account']['#value']),
          '#description'   => t('Checking this box allows you to automatically subscribe to any thread you create or post a comment to.'),
        );
      }
      break;
    case 'notifications_content_settings_form':
      $form['autosubscribe'] = array('#type' => 'fieldset', '#title' => t('Autosubscribe'), '#weight' => -10);
      $form['autosubscribe']['notifications_default_auto'] = array(
        '#type'          => 'checkbox',
        '#title'         => t('Set all users to "autosubscribe" by default'),
        '#default_value' => variable_get('notifications_default_auto', 0),
        '#description'   => t("If checked the option will be 'enabled' by default for user account settings. This won't change existing settings for users who have already defined it."),
      );
      break;
  }
}

/**
 * Implementation of hook_notifications_node_form_alter
 * 
 * Replace normal 'thread' subscription by autosubscribe option
 */
function notifications_autosubscribe_notifications_node_form_alter(&$form) {
  global $user;

  if (!empty($form['subscriptions']['params']) && notifications_user_setting('auto', $form['subscriptions']['account']['#value'])) {
    foreach ($form['subscriptions']['params']['#value'] as $index => $current) {
      if ($current['type'] == 'thread' && empty($current->sid)) {
        $form['subscriptions']['autosubscribe'] = array(
          '#type' => 'checkbox',
          '#default_value' => 1,
          '#disabled' => TRUE,
          '#title' => $form['subscriptions']['options']['#options'][$index],
          '#description' => t('You are currently set to receive notifications for replies to content which you create. To change this default, uncheck the autosubscribe option in your user account settings.'),
        );
        unset($form['subscriptions']['options']['#options'][$index]);
      }
    }
  }
}