realtime.module

<?php
/**
 * @file
 */

/**
 * Implements hook_menu().
 */
function realtime_menu() {
  $items = array();
  
  $items['admin/config/realtime'] = array(
    'title' => 'Google Realtime authentication settings',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('realtime_admin_auth_form'),
    'file' => 'realtime.pages.inc',
    'access arguments' => array('administer realtime'),
  );
  
  return $items;
}

/**
 * Implements hook_node_prepare().
 */
function realtime_node_prepare($node) {
  if(!empty($node->nid)) {
    $realtimeOptions = array(
    //Client ID from the APIs Console.
    'clientId' => variable_get('realtime_client_id'),
    
    //The ID of the button to click to authorize. Must be a DOM element ID.
    'authButtonElementId' => 'authorizeButton',
    
    //Function to be called when a Realtime model is first created.
    'initializeModel' => 'initializeModel',
    
    //Autocreate files right after auth automatically.
    'autoCreate' => true,
    
    //Autocreate files right after auth automatically.
    'defaultTitle' => 'NodeID:' . $node->nid,
    
    //Function to be called every time a Realtime file is loaded.
    'onFileLoaded' => 'onFileLoaded',
    
    'body' => $node->body['und'][0]['value'],
    );
    
    drupal_add_js('http://apis.google.com/js/api.js', 'external');
    drupal_add_js(array('realtime' => $realtimeOptions), 'setting');
    
    $querystring = drupal_get_query_parameters();
    if(!empty($querystring['fileId'])) {
      $firstcome = db_query('SELECT uid FROM {realtime_node_gdoc} WHERE nid = :nid',array(':nid' => $node->nid))->fetchField();
      if(empty($firstcome)){
        global $user;
        db_merge('realtime_node_gdoc')
          ->key(array('docid' => $querystring['fileId']))
          ->fields(array(
                'docid' => $querystring['fileId'],
                'nid' => $node->nid,
                'uid' => $user->uid,
          ))
          ->execute();
      }
    } 
  }
}

/**
 * Implements hook_form_alter().
 */
function realtime_form_node_form_alter(&$form, &$form_state) {
  array_unshift($form['#validate'], 'collision_buster_bust');
  $form['#validate'][] = 'collision_buster_reset';

/*   dpr($form); */
  $form['mymarkup'] = array(
    '#type' => 'markup', 
    '#markup' => '<button id="authorizeButton" disabled>Signin to Google+ to collaborate</button>',
    '#weight' => -99,
  );
  
  if(!empty($form['nid']['#value'])) {
    drupal_add_js(drupal_get_path('module', 'realtime') .'/js/realtime.js', array('type' => 'file', 'scope' => 'footer', 'weight' => 5));
    drupal_add_js(drupal_get_path('module', 'realtime') .'/js/realtime-client-utils.js', array('type' => 'file', 'scope' => 'footer', 'weight' => 5));
    drupal_add_js('startRealtime()', array('type' => 'inline', 'scope' => 'footer', 'weight' => 15));
  }
}

/**
  * Implement hook_node_update() to unlock a node after it's saved.
  *
  * This hook is invoked after hook_node_save() is invoked and after
  * the changes to the node are actually saved to the database, so it's
  * the right place to unlock a modified node.
  *
  * @param $node
  *   The node which was saved.
  */
function realtime_node_update($node) {
  db_query('DELETE FROM {realtime_node_gdoc} WHERE nid = :nid',array(':nid' => $node->nid));
}


function hook_node_delete($node) {
  db_query('DELETE FROM {realtime_node_gdoc} WHERE nid = :nid',array(':nid' => $node->nid));
}

/**
 * Change the $node->changed value to now.
 *
 * This fools the collision check performed in node_validate().
 */
function collision_buster_bust($form, &$form_state) {
  if (isset($form_state['values']['nid'])) {
    $form_state['values']['collision_buster_changed'] = $form_state['values']['changed'];
    $form_state['values']['changed'] = time();
  }
}

/**
 * Reset $node->changed to its original value.
 */
function collision_buster_reset($form, &$form_state) {
  if (isset($form_state['values']['collision_buster_changed'])) {
    $form_state['values']['changed'] = $form_state['values']['collision_buster_changed'];
    unset($form_state['values']['collision_buster_changed']);
  }
}

function realtime_url_outbound_alter(&$path, &$options, $original_path) {
  if (preg_match('|^node/([0-9]*)/edit(/.*)?|', $path, $matches)) {
    $node = node_load($matches[1]);
    if ($node->nid == $matches[1]) {
      $fileID = db_query('SELECT docid FROM {realtime_node_gdoc} WHERE nid = :nid',array(':nid' => $matches[1]))->fetchField();
      if($fileID) {
        $options['query']['fileId'] = $fileID;        
      }
    }
  }
}