commons_follow_node.module in Drupal Commons 7.3

File

modules/commons/commons_follow/commons_follow_node/commons_follow_node.module

<?php

/**
 * @file
 * Code for the Commons Follow (Individual nodes) feature.
 */
include_once 'commons_follow_node.features.inc';

/**
 * Implements hook_commons_follow_get_nids().
 */
function commons_follow_node_commons_follow_get_nids($account, $options) {

  // Get all flaggings from flags that belong to Message-subscribe, that
  // reference the node entity-type.
  // Get subscribe flag IDs.
  $flag_ids = commons_follow_get_subscription_flags_ids('node');
  if (empty($flag_ids)) {
    return array();
  }
  $query = db_select('flagging', 'f');
  if (!empty($options['range'])) {
    $query
      ->range(0, $options['range']);
  }
  $result = $query
    ->condition('fid', $flag_ids, 'IN')
    ->condition('uid', $account->uid, '=')
    ->condition('entity_type', 'node', '=')
    ->fields('f', array(
    'entity_id',
  ))
    ->execute()
    ->fetchAll();
  $nids = array();
  foreach ($result as $row) {
    $nids[] = (int) $row->entity_id;
  }
  return $nids;
}

/**
* Implements hook_commons_follow_get_message_ids().
*/
function commons_follow_node_commons_follow_get_message_ids(&$followed_mids, $followed_content = array()) {

  // Generate a list of message IDs where the target nodes are followed by
  // the current user.
  $result = db_query("SELECT m.mid AS mid FROM {message} m INNER JOIN {field_data_field_target_nodes} tn ON m.mid=tn.entity_id WHERE tn.field_target_nodes_target_id IN (:nids)", array(
    ':nids' => array_values($followed_content['commons_follow_node']),
  ));
  foreach ($result as $this_result) {
    $followed_mids[] = $this_result->mid;
  }
}

/**
 * Implements hook_node_insert().
 */
function commons_follow_node_node_insert($node) {

  // The owner of the content automatically follows the content
  commons_follow_node_follow_node($node->nid, $node->type, $node->uid);
}

/**
 * Implements hook_comment_insert().
 */
function commons_follow_node_comment_insert($comment) {

  // The user who comment a node automatically follows that content
  $content_type = str_replace('comment_node_', '', $comment->node_type);
  commons_follow_node_follow_node($comment->nid, $content_type, $comment->uid);
}

/**
 * Let a user to follow a node.
 *
 * @see commons_follow_node_comment_insert
 * @see commons_follow_node_node_insert
 */
function commons_follow_node_follow_node($nid, $content_type, $user_id = NULL) {
  if ($flag = flag_get_flag('commons_follow_node')) {

    // Check if this content type use the "Individual nodes" flag
    if (in_array($content_type, $flag->types)) {
      $account = isset($user_id) ? user_load($user_id) : NULL;
      $flag
        ->flag('flag', $nid, $account);
    }
  }
}

Functions

Name	Description
commons_follow_node_comment_insert	Implements hook_comment_insert().
commons_follow_node_commons_follow_get_message_ids	Implements hook_commons_follow_get_message_ids().
commons_follow_node_commons_follow_get_nids	Implements hook_commons_follow_get_nids().
commons_follow_node_follow_node	Let a user to follow a node.
commons_follow_node_node_insert	Implements hook_node_insert().