Remove Gravatar from core and add new hook avatar_lookup.

This patch removes all occurances of Gravatar from friendica's core and adds a new hook "avatar_lookup" inside the function avatar_img($email) where the new *avatar-plugins should hook in.
I haven't touched the language files yet. Are they updated automatically somehow?

6 files changed, 18 insertions, 34 deletions

diff --git a/doc/Plugins.md b/doc/Plugins.md
index 29dff3187..df6004450 100644
--- a/doc/Plugins.md
+++ b/doc/Plugins.md
@@ -164,10 +164,15 @@ Your module functions will often contain the function plugin_name_content(&$a),
 **'init_1'** - called just after DB has been opened and before session start
     $b is not used or passed
 
-
 **'page_end'** - called after HTML content functions have completed
     $b is (string) HTML of content div
 
+**'avatar_lookup'** - called when looking up the avatar
+    $b is (array)
+        'size' => the size of the avatar that will be looked up
+        'email' => email to look up the avatar for
+        'url' => the (string) generated URL of the avatar
+
 
 A complete list of all hook callbacks with file locations (generated 14-Feb-2012): Please see the source for details of any hooks not documented above.
 
diff --git a/doc/Settings.md b/doc/Settings.md
index 9808ecc5d..574ce8dcc 100644
--- a/doc/Settings.md
+++ b/doc/Settings.md
@@ -172,16 +172,6 @@ $a->config['system']['no_regfullname'] = true;
 ```
 
 
-**Gravatars**
-
-During registration, we will try to automatically find a user photo for you on the web using the gravatar service. You may turn this off by setting 'no_gravatar' to true. Default is false.
-
-Config:
-```
-$a->config['system']['no_gravatar'] = true;
-```
-
-
 **OpenID**
 
 By default, OpenID may be used for both registration and logins. If you do not wish to make OpenID facilities available on your system (at all), set 'no_openid' to true. Default is false.
diff --git a/include/network.php b/include/network.php
index 59705634b..58cef4756 100644
--- a/include/network.php
+++ b/include/network.php
@@ -694,16 +694,14 @@ function allowed_email($email) {
 
 if(! function_exists('avatar_img')) {
 function avatar_img($email) {
-	$size = 175;
-	$opt = 'identicon';   // psuedo-random geometric pattern if not found
-	$rating = 'pg';
-	$hash = md5(trim(strtolower($email)));
+	$avatar['size'] = 175;
+	$avatar['email'] = $email;
+	$avatar['url'] = '';
 
-	$url = 'http://www.gravatar.com/avatar/' . $hash . '.jpg' 
-		. '?s=' . $size . '&d=' . $opt . '&r=' . $rating;
+	call_hooks('avatar_lookup', $avatar);
 
-	logger('gravatar: ' . $email . ' ' . $url);
-	return $url;
+	logger('Avatar: ' . $avatar['email'] . ' ' . $avatar['url']);
+	return $avatar['url'];
 }}
 
 
diff --git a/mod/admin.php b/mod/admin.php
index a395027c1..961002786 100644
--- a/mod/admin.php
+++ b/mod/admin.php
@@ -174,7 +174,6 @@ function admin_page_site_post(&$a){
 		return;
 	}
 
-	
 	$sitename 			=	((x($_POST,'sitename'))			? notags(trim($_POST['sitename']))			: '');
 	$banner				=	((x($_POST,'banner'))      		? trim($_POST['banner'])					: false);
 	$language			=	((x($_POST,'language'))			? notags(trim($_POST['language']))			: '');
@@ -194,7 +193,6 @@ function admin_page_site_post(&$a){
 	$global_directory	=	((x($_POST,'directory_submit_url'))	? notags(trim($_POST['directory_submit_url']))	: '');
 	$no_multi_reg		=	((x($_POST,'no_multi_reg'))		? True	:	False);
 	$no_openid			=	!((x($_POST,'no_openid'))		? True	:	False);
-	$no_gravatar		=	!((x($_POST,'no_gravatar'))		? True	:	False);
 	$no_regfullname		=	!((x($_POST,'no_regfullname'))	? True	:	False);
 	$no_utf				=	!((x($_POST,'no_utf'))			? True	:	False);
 	$no_community_page	=	!((x($_POST,'no_community_page'))	? True	:	False);
@@ -204,7 +202,7 @@ function admin_page_site_post(&$a){
 	$proxy				=	((x($_POST,'proxy'))			? notags(trim($_POST['proxy']))	: '');
 	$timeout			=	((x($_POST,'timeout'))			? intval(trim($_POST['timeout']))		: 60);
 	$dfrn_only          =	((x($_POST,'dfrn_only'))	    ? True	:	False);
-    $ostatus_disabled   =   !((x($_POST,'ostatus_disabled')) ? True  :   False);
+	$ostatus_disabled   =   !((x($_POST,'ostatus_disabled')) ? True  :   False);
 	$diaspora_enabled   =   ((x($_POST,'diaspora_enabled')) ? True   :  False);
 	$ssl_policy         =   ((x($_POST,'ssl_policy')) ? intval($_POST['ssl_policy']) : 0);
 
@@ -283,7 +281,6 @@ function admin_page_site_post(&$a){
 	set_config('system','directory_search_url', $global_search_url);
 	set_config('system','block_extended_register', $no_multi_reg);
 	set_config('system','no_openid', $no_openid);
-	set_config('system','no_gravatar', $no_gravatar);
 	set_config('system','no_regfullname', $no_regfullname);
 	set_config('system','no_community_page', $no_community_page);
 	set_config('system','no_utf', $no_utf);
@@ -380,7 +377,6 @@ function admin_page_site(&$a) {
 			
 		'$no_multi_reg'		=> array('no_multi_reg', t("Block multiple registrations"),  get_config('system','block_extended_register'), t("Disallow users to register additional accounts for use as pages.")),
 		'$no_openid'		=> array('no_openid', t("OpenID support"), !get_config('system','no_openid'), t("OpenID support for registration and logins.")),
-		'$no_gravatar'		=> array('no_gravatar', t("Gravatar support"), !get_config('system','no_gravatar'), t("Search new user's photo on Gravatar.")),
 		'$no_regfullname'	=> array('no_regfullname', t("Fullname check"), !get_config('system','no_regfullname'), t("Force users to register with a space between firstname and lastname in Full name, as an antispam measure")),
 		'$no_utf'			=> array('no_utf', t("UTF-8 Regular expressions"), !get_config('system','no_utf'), t("Use PHP UTF8 regular expressions")),
 		'$no_community_page' => array('no_community_page', t("Show Community Page"), !get_config('system','no_community_page'), t("Display a Community page showing all recent public postings on this site.")),
diff --git a/mod/register.php b/mod/register.php
index 8812ebadb..b60707d45 100644
--- a/mod/register.php
+++ b/mod/register.php
@@ -314,17 +314,13 @@ function register_post(&$a) {
 
 	}
 
-	$use_gravatar = ((get_config('system','no_gravatar')) ? false : true);
-
-	// if we have an openid photo use it. 
-	// otherwise unless it is disabled, use gravatar
-
-	if($use_gravatar || strlen($photo)) {
+	// if we have no OpenID photo try to look up an avatar
+	if(! strlen($photo))
+		$photo = avatar_img($email);
 
+	// unless there is no avatar-plugin loaded
+	if(strlen($photo)) {
 		require_once('include/Photo.php');
-
-		if(($use_gravatar) && (! strlen($photo))) 
-			$photo = avatar_img($email);
 		$photo_failure = false;
 
 		$filename = basename($photo);
diff --git a/view/admin_site.tpl b/view/admin_site.tpl
index 01fe893c6..ec144fbba 100644
--- a/view/admin_site.tpl
+++ b/view/admin_site.tpl
@@ -17,7 +17,6 @@
 	
 	{{ inc field_checkbox.tpl with $field=$no_multi_reg }}{{ endinc }}
 	{{ inc field_checkbox.tpl with $field=$no_openid }}{{ endinc }}
-	{{ inc field_checkbox.tpl with $field=$no_gravatar }}{{ endinc }}
 	{{ inc field_checkbox.tpl with $field=$no_regfullname }}{{ endinc }}
 	
 	<div class="submit"><input type="submit" name="page_site" value="$submit" /></div>