Google Drive Embedder hooks

Filter: gde_gather_custom_properties

Available in Google Drive Embedder Enterprise plugin only.
The Drive Enterprise plugin applies this filter to allow your extension to add custom properties to Google Drive folders and files that you associate with your WordPress site.
For example, you could mark all auto-created folders with a special tag that you can use in Drive search calls elsewhere.

Params:

$custom_properties – Array of properties to add to file/folder, from other plugins, or null if none added yet.
$type – A string (either ‘root’, ‘post’, or ‘blog’) indicating where the folder/file is being embedded in your site. ‘root’ means the base folder is being created in the Settings page (this is a one-off); ‘blog’ means a multisite sub-blog is having its top-level folder created within your base folder hierarchy; ‘post’ means a folder/file is being attached to a post (or page etc) in your site.
$id – The blog_id or post_id of the relevant sub-blog (multisite only) or post. This parameter is null if $type equals ‘root’.

Return:

Array of properties to add to file/folder, adding your own properties, or null if no properties are to be added.

Each custom property is an associative array containing the keys: ‘key’, ‘value’, and (optionally) ‘visibility’. These correspond to the values required by the Drive API. Visibility defaults to PUBLIC, not PRIVATE.

Example:

function my_gde_gather_custom_properties($custom_properties, $type, $id) {
   return array_merge(is_null($custom_properties) ? array() : $custom_properties,
                   Array( 
                      Array('key' => 'intranetfile', 'value' => $type, 'visibility' => 'PRIVATE') 
                   ) );
   }

add_filter('gde_gather_custom_properties', 'my_gde_gather_custom_properties', 10, 3 );

Hook: gde_after_do_create_folder (Enterprise only)

Available in Google Drive Embedder Enterprise plugin only.
The Drive Enterprise plugin fires this hook after an attachments folder is auto-created.

Params:

$id – the newly created Google Drive folder ID
$driveservice – an object for calling Drive API
$parent_folderid – Drive folder ID of the parent folder it was created within
$post_name – Name of the post/page of which the folder is an attachment (this name will also be the name of the folder in Drive)
$owner_email – User who should own the folder
$writer_email – Users who should have edit rights
$custom_properties – meta properties assigned to the Drive folder

See core/folders/drive_helper.php to further understand the context in which the hook is fired.

Hook: gde_attachment_folder_atts (Enterprise v3.8.6+ only)

Available in Google Drive Embedder Enterprise plugin only.

A filter to obtain the equivalent of folder shortcode parameters for an Attachment Folder.

Params:

$folderparams – PHP Array containing key/value pairs of the default shortcode params. You can add or modify entries before returning this array.

Return:

Array of shortcode params – $folderparams as provided as an input.

Example:

Change the columns that are displayed – removes author column compared to the default columns that you’d see without this filter:

function my_gde_attachment_folder_atts ($folderparams) {
   $folderparams['columns'] = 'title,lastmodified,size';
   return $folderparams;
}

add_filter('gde_attachment_folder_atts', 'my_gde_attachment_folder_atts', 10, 1);

Hook: gde_shortcode_folder_atts (Enterprise v3.9.4+ only)

Available in Google Drive Embedder Enterprise plugin only.

A filter to obtain the equivalent of folder shortcode parameters for a folder shortcode. This works identically to the equivalent filter for attachment folders (gde_attachment_folder_atts), but applies instead to explicit google-drive-folder shortcodes.

Params:

$folderparams – PHP Array containing key/value pairs of the default shortcode params. You can add or modify entries before returning this array.

Return:

Array of shortcode params – $folderparams as provided as an input.

Example:

Regardless of the columns parameter that the page author might have added to the shortcode, ensure that every embedded folder only displays the title column. Apply this to attachment folders too using the gde_attachment_folder_atts filter:

function my_gde_folder_atts ($folderparams) {
   $folderparams['columns'] = 'title';
   return $folderparams;
} 
add_filter('gde_attachment_folder_atts', 'my_gde_folder_atts', 10, 1);
add_filter('gde_shortcode_folder_atts', 'my_gde_folder_atts', 10, 1);

Hook: gde_toplevel_foldername_for_post (Enterprise v3.9.5+ only)

Available in Google Drive Embedder Enterprise plugin only.

A filter to insert extra top-level folders so you can better organize Attachment Folders within your base folder. This will only be called the first time the Attachment Folder is created for a particular post (or page or custom type). It will only be called again if the folder is ever recreated, e.g. if you switch to a different base folder in the plugin settings.

Params:

$foldername – The default suggested top-level folder.
$post – The WP_Post object of the post that is to have its corresponding Attachment Folder created.

Return:

String containing the suggested folder name – just return $foldername to avoid inserting an extra level of folder within the hierarchy.

Example:

To insert an extra ‘Articles’ folder to contain all custom posts if type ‘article’:

function my_gde_toplevel_foldername_for_post($foldername, $post) {
   if (isset($post->post_type) && $post->post_type == 'article') {
      return 'Articles';
   }
   return $foldername;
}

add_filter('gde_toplevel_foldername_for_post', 'my_gde_toplevel_foldername_for_post', 10, 2);

Folder Javascript Hooks

Enterprise-style folder embeds also fire some Javascript events when certain things happen. See Folder JS Hooks.

Service Accounts

As of Google Apps Login version 2.5, users can configure a Service Account which your extensions can access. The Google Apps Directory plugin is a free example plugin that takes advantage of this.

See gal_gather_serviceacct_reqs below. And here is some example code as to how you might obtain the Service Account object:

if (!function_exists('GoogleAppsLogin')) {
   die("Google Apps Login plugin needs to be activated and configured");
}
		 
try {
   $gal = GoogleAppsLogin();

   $cred = $gal->get_Auth_AssertionCredentials(
      array('https://www.googleapis.com/auth/admin.directory.user.readonly'));
				
   $serviceclient = $gal->get_Google_Client();
				
   $serviceclient->setAssertionCredentials($cred);
		
   // Include paths were set when client was created
   if (!class_exists('GoogleGAL_Service_Directory')) {
      require_once( 'Google/Service/Directory.php' );
   }
				
   $userservice = new GoogleGAL_Service_Directory($serviceclient);
   	
   $usersresult = $userservice->users->listUsers(Array('query' => $searchstr, 'customer' => 'my_customer'));
   $usersdata = $usersresult->getUsers();

Filter: gal_gather_serviceacct_reqs

The Login plugin applies this filter to allow your extension to instruct it to list extra Google domain-wide authorization scopes (permissions) when providing instructions for the user to configure the Service Account.

Params:

$reqs_array – Array of scope definitions from other plugins.

Return:

Array of scope definitions, adding your own scope definitions first if needed. Do not worry about potential duplicates – the plugin takes care of that.

The array element you should add is an array itself containing:
Your extension name in element 0, and another array in element 1.
That other array (in element 1) should be an associative array of Google API scopes mapping to plain English reasons why your extension needs that scope.

This information only adds to the documentation instructing a user to set up the Service Account. The scopes aren’t added automatically just because they are listed in response to this filter.

Example:

public function gad_gather_serviceacct_reqs($reqs_array) {
   $reqs_array[] = array('Google Apps Directory', 
                       array('https://www.googleapis.com/auth/admin.directory.user.readonly'
                       => 'Search for user information in your domain'));
   return $reqs_array;
}

add_filter('gal_gather_serviceacct_reqs', 'gad_gather_serviceacct_reqs' );

Google Apps Login hooks

Action: gal_user_loggedin

This action is fired whenever a user is successfully authenticated into WordPress using Google Login. You could use it to obtain and save information such as profile photo URL.

Params:

$wp_user – the WP_User object that just logged into WordPress (via Google auth) – note this could have been created by the plugin just now
$google_userinfo – an object holding the raw profile data direct from Google
$wp_userisnew – boolean set to true if the WP_User has just been created on this login; false if the WP user already existed
$google_client is a Google client library object that you could use to make further Google calls
$google_oauth2service – a Google object used to fetch the profile data for GAL plugin

Return:

Void (nothing)

Example:

function my_google_user_loggedin( $wp_user, $google_userinfo, $wp_userisnew, $google_client, $google_oauth2service ) {
   /* google_userinfo object example:
   "id": "115886881859296909934",
   "email": "[email protected]",
   "verified_email": true,
   "name": "Dan Lester",
   "given_name": "Dan",
   "family_name": "Lester",
   "link": "https://plus.google.com/115886881859296909934",
   "picture": "https://lh3.googleusercontent.com/-r4WThnaSX8o/AAAAAAAAAAI/AAAAAAAAABE/pEJQwH5wyqM/photo.jpg",
   "gender": "male",
   "locale": "en-GB",
   "hd": "mycompany.com"
   */

   // Do something with the data
   error_log("User just logged in with WordPress account ".$wp_user->ID." bringing Google user id ".$google_userinfo->id);
   error_log("User is ".( $wp_userisnew ? "brand new" : "old"));

   // Save picture URL
   update_user_meta( $wp_user->ID, 'user_avatar', $google_userinfo->picture );
}

add_action('gal_user_loggedin', 'my_google_user_loggedin', 10, 5);

Filter: gal_login_url – versions 2.8.11+

The Login plugin applies this filter to the login URL it calculates for your site, allowing you to change the ‘callback’ URL that it passes to Google’s login flow. Normally that is /wp-login.php on your site. You might want to change it if you find that the plugin determines an incorrect URL as the callback – for example if another custom login plugin tries to convince all other plugins that its own custom login page (perhaps at /login) is the real URL.

Params:

$login_url – the login URL that the plugin has calculated.

Return:

String – the URL that you want to use to represent the login page instead. Return $login_url for no change.

Example:

function my_gal_login_url($login_url) {
   return 'https://mysite.com/login';
}

add_filter('gal_login_url', 'my_gal_login_url', 10, 1);

Filter: gal_login_button_text – versions 2.8.17+

Filter gal_login_button_text allows you to specify the text displayed on the ‘Login with Google’ button displayed on the WordPress login page. This will work in all versions of the plugin, but in Premium/Enterprise versions it is also possible for an admin to set the button text in Settings, and that will always take priority if set.

Params:

$login_button_text – the default button text.

Return:

String – the button text that you want to use instead. Return $login_button_text for no change.

Example:

function my_gal_login_button_text($login_button_text) {
   return 'Click Here to Login';
}

add_filter('gal_login_button_text', 'my_gal_login_button_text', 10, 1);

Filter: gal_set_login_cookie – versions 2.9.7+

Filter gal_set_login_cookie allows you to specify whether the plugin should set the wordpress_google_apps_login cookie on the current request. By default, the cookie is set on any request if it doesn’t already exist. However, it is normally only absolutely necessary to update this on requests to the wp-login.php page in most setups.

The default scenario could affect caching behavior for some web servers, potentially causing all pages to be generated dynamically every time.

Params:

$dosetcookie – whether to set the cookie or not (boolean).

Return:

$dosetcookie – boolean value whether to set cookie or not.

Example:

function my_gal_set_login_cookie($dosetcookie) {
  // Only set cookie on wp-login.php page
  return $GLOBALS['pagenow'] == 'wp-login.php';
}
add_filter('gal_set_login_cookie', 'my_gal_set_login_cookie');

Filter: gal_sanitize_username – Enterprise/Premium plugin 2.8.6+ only

The Login plugin applies this filter to allow your extension to modify the username of an automatically created user when they first attempt to Login with Google.

Params:

$username – The default username which will normally be the email address of the user
$userinfo – An array containing details from the user’s Google profile (e.g. name, given_name, family_name)

Return:

String – the username that you would like for the user. This should be a unique username in your WordPress site.

Example:

function my_gal_sanitize_username($username, $userinfo) {
  $parts = explode("@", $username);
  if (count($parts) == 2) {
     $username = $parts[0]; /* Just return the bit before the domain name */
                            /*- e.g. [email protected] becomes dan.lester */
  }
  return $username;
}

add_filter('gal_sanitize_username', 'my_gal_sanitize_username', 10, 2);

Note: please see the gal_pre_create_new_user to modify more fields than just the username.

Filter: gal_pre_create_new_user – Enterprise/Premium plugin 2.9.6+ only

The Login plugin applies this filter to allow your extension to modify the WordPress userdata of an automatically created user when they first attempt to Login with Google. This means the data that is passed to the WordPress function wp_insert_user to create the user.

Params:

$wpuserdata – The userdata to be passed to wp_insert_user. The gal_sanitize_username filter will have already been applied.
$userinfo – An array containing details from the user’s Google profile (e.g. name, given_name, family_name)

Return:

$wpuserdata – the userdata to be used to create the WordPress user, or a WP_Error object to abort creation of the user.

Example:

function my_gal_pre_create_new_user($wpuserdata, $userinfo) {
  if ($wpuserdata['first_name'] == 'Dan') {
     return new WP_Error("NODAN", "We do not allow people called Dan on this site.");
  }
  return $wpuserdata;
}

add_filter('gal_pre_create_new_user', 'my_gal_pre_create_new_user', 10, 2);

Action: gal_post_create_new_user – Enterprise/Premium plugin 2.9.6+ only

The Login plugin calls this hook to inform your extension after it automatically created user when they first attempted to Login with Google.

Params:

$wpuserdata – The userdata that was passed to wp_insert_user.
$userinfo – An array containing details from the user’s Google profile (e.g. name, given_name, family_name)
$user_id – The user’s ID in WordPress

Example:

function my_gal_post_create_new_user($wpuserdata, $userinfo, $user_id) {
  // Record that the user was auto-created by the plugin
  add_user_meta( $user_id, 'is_a_google_user', true );
}

add_filter('gal_post_create_new_user', 'my_gal_post_create_new_user', 10, 3);

Filter: gal_user_new_role – Enterprise plugin only

The Login plugin applies this filter to allow your extension to change the desired role for a user when Google Groups (or email addresses) are causing the plugin to change the role.

Params:

$want_role – the role that the plugin wants to set
$user – WP_User object of the user whose role is to be set
$blogid – The blog ID (only really relevant on multisite installations)
$is_user_member – boolean specifying whether user is already a member of this blog (only really relevant for multisite – on single site this will always be true)
$in_groups – dictionary with keys showing email addresses of Google Groups of which the user is a member (including the faux Group consisting of the user’s own email address); each key maps simply to the boolean value true

For example, if the user has email address [email protected], $in_groups may equal: Array( ‘[email protected]’ => true, ‘[email protected]’ => true, ‘[email protected]’ => true )

Return:

String – the default should be $want_role if you don’t want to affect the outcome, and want the plugin to proceed with the role change as intended.
Return empty string ” to remove all privileges from the blog for the user.

Example:

function my_user_new_role($want_role, $user, $blogid, $is_user_member, $in_groups) {
   if ($blogid == 4 && $user->ID != 1) {
     // No-one should have any privileges on sub-blog 4 except user with ID 1
     return '';
   }
   return $want_role;
}

add_filter('gal_user_new_role', 'my_user_new_role', 10, 5);

Filter: gal_user_role_changed – Enterprise plugin only

The Login plugin fires this hook to notify that the user role has been changed (for a particular blog). Contrast this with the previous filter gal_user_new_role that allows you to alter the desired role before the role is set. Otherwise, the parameters are basically the same as that filter.

Params:

$want_role – the role that the plugin has set, empty string to mean no access.
$user – WP_User object of the user whose role was set
$blogid – The blog ID (only really relevant on multisite installations)
$is_user_member – boolean specifying whether user was already a member of this blog (only really relevant for multisite – on single site this will always be true)
$in_groups – dictionary with keys showing email addresses of Google Groups of which the user is a member (including the faux Group consisting of the user’s own email address); each key maps simply to the boolean value true (see gal_user_new_role for details).

Example:

Add secondary roles to the user based on group membership.

function dsl_my_user_role_changed($want_role, $user, $blogid, $is_user_member, $in_groups) {
   $extraroles = array('[email protected]' => 'payingcustomer',
                       '[email protected]' => 'courserep');

   $extra_roles = array_values(array_intersect_key($extraroles, $in_groups));

   if (is_multisite()) {
      switch_to_blog($blogid);
      $blog_user = get_userdata( $user->ID );
      foreach ( $extra_roles as $role ) {
         $user->add_role($role);
      }
      restore_current_blog();
   }
   else {
      foreach ( $extra_roles as $role ) { 
         $user->add_role($role);
      }
   }
}

add_action('gal_user_role_changed', 'dsl_my_user_role_changed', 10, 5);

Accessing core Google configuration

Filter: gal_gather_scopes

The Login plugin applies this filter to allow your extension to instruct it to obtain extra Google authorization scopes (permissions) when users login to via Google. For example, you can tell the Login plugin to ask for authorization to access the user’s Drive, in addition to the profile permissions it always asks for.

Params:

$scopes – Array of scopes from other plugins.

Return:

Array of scopes, adding your own scopes first if needed. Do not worry about potential duplicates – the plugin takes care of that.

Example:

function my_gather_scopes($scopes) {
   return array_merge($scopes, Array('https://www.googleapis.com/auth/drive.readonly',
                                     'https://www.googleapis.com/auth/drive.file');
}

add_filter('gal_gather_scopes', 'my_gather_scopes' );

Filter: gal_get_clientid

This is a filter implemented by the Login plugin that your extension might call. Your extension is unlikely to implement this filter itself, but may want to make use of its return value.

This obtains the Google Cloud Console Project’s Client ID from the Login plugin – the Client ID is the code that the admin enters when they first set up the Login plugin.

You may want to pass this to your own Javascript code in order to call Google APIs on the browser. The Drive plugin does this – see its source code.

Params:

Empty string (ignored)

Returns:

String containing Client ID or empty string if Login plugin is not yet configured.

Example:

$clientid = apply_filters('gal_get_clientid', '');

Filter: gal_client_config_ini

The Login plugin applies this filter to allow your extension to specify a filesystem path to an INI file OR a GoogleGAL_Config object to pass to Google’s client library on instantiation

Params:

None

Return:

String – full filesystem path to your INI file. See client library source code in core/Google/Client.php to understand the format and options for this INI file.

GoogleGAL_Config object – an instance of this config object class.

Null – default, don’t pass any configuration file.

Example 1 – config in an ini-file instructing Google client library to not cache requests in the filesystem at all:

function my_client_config_ini($inipath) { 
    if (!class_exists('GoogleGAL_Cache_Null')) {
       require_once '/var/www/~username/wp/wp-content/plugins/googleappslogin-enterprise/core/Google/Cache/Null.php'; /* <--- you will need to enter the full path here */
    }

   return '/var/ini/my_google_client_library_settings.ini';
}
add_filter('gal_client_config_ini', 'my_client_config_ini', 10, 1);

And the my_google_client_library_settings.ini file would contain just one line:

cache_class = GoogleGAL_Cache_Null

Example 2 - providing a custom config object that supplies Proxy options for calling the Google servers:

function my_client_config_ini($inipath) { 
  if (!class_exists('GoogleGAL_Config') || !class_exists('GoogleGAL_IO_Curl')) {
    return $inipath;
  }
  if (!class_exists('GoogleGAL_IO_Curl_My')) {
    class GoogleGAL_IO_Curl_My extends GoogleGAL_IO_Curl
    {

      public function __construct(GoogleGAL_Client $client)
      {
        parent::__construct($client);
        $this->setOptions(array(
          CURLOPT_PROXY => 'https://proxy.url/',
          CURLOPT_PROXYUSERPWD => 'userpwd'
        ));
      }

    }
  }

  $conf = new GoogleGAL_Config();
  $conf->setIoClass('GoogleGAL_IO_Curl_My');
  return $conf;
}

add_filter('gal_client_config_ini', 'my_client_config_ini', 10, 1);