shortening links in notices from XMPP

This patch enables shortening of links, that where send from XMPP.
The problem was, that in util.php common_current_user() is not
finding the user account from which is posted, so the service to
shorten is not known, so no shortening at all...

This patch cleans up the xmppdaemon a little bit and hard codes ur1.ca
as shortening service _if_ the user is not set. Ugly but working.

lib/util.php

@@ -519,11 +519,16 @@ function common_shorten_links($text)
 
 function common_shorten_link($url, $reverse = false)
 {
+
     static $url_cache = array();
     if ($reverse) return isset($url_cache[$url]) ? $url_cache[$url] : $url;
 
     $user = common_current_user();
-
+    if (!isset($user)) {
+      // common current user does not find a user when called from the XMPP daemon
+      // therefore we'll set one here fix, so that XMPP given URLs may be shortened
+      $user->urlshorteningservice = 'ur1.ca';
+    }
     $curlh = curl_init();
     curl_setopt($curlh, CURLOPT_CONNECTTIMEOUT, 20); // # seconds to wait
     curl_setopt($curlh, CURLOPT_USERAGENT, 'Laconica');
@@ -1321,16 +1326,3 @@ function common_compatible_license($from, $to)
     // XXX: better compatibility check needed here!
     return ($from == $to);
 }
-
-/**
- * returns a quoted table name, if required according to config
- */
-function common_database_tablename($tablename)
-{
-  
-  if(common_config('db','quote_identifiers')) {
-      $tablename = '"'. $tablename .'"';
-  }
-  //table prefixes could be added here later
-  return $tablename;
-}

scripts/xmppdaemon.php

@@ -152,11 +152,6 @@ class XMPPDaemon extends Daemon
             $body = preg_replace('/d[\ ]*('. $to .')[\ ]*/', '', $pl['body']);
             $this->add_direct($user, $body, $to, $from);
         } else {
-            $len = mb_strlen($pl['body']);
-            if($len > 140) {
-                $this->from_site($from, 'Message too long - maximum is 140 characters, you sent ' . $len);
-                return;
-            }
             $this->add_notice($user, $pl);
         }
 
@@ -255,15 +250,13 @@ class XMPPDaemon extends Daemon
     function add_notice(&$user, &$pl)
     {
         $body = trim($pl['body']);
-        $content_shortened = common_shorten_link($body);
+        $content_shortened = common_shorten_links($body);
         if (mb_strlen($content_shortened) > 140) {
-            $content = trim(mb_substr($body, 0, 140));
+          $from = jabber_normalize_jid($pl['from']);
-            $content_shortened = common_shorten_link($content);
+          $this->from_site($from, "Message too long - maximum is 140 characters, you sent ".mb_strlen($content_shortened));
+          return;
         }
-        else {
+        $notice = Notice::saveNew($user->id, $content_shortened, 'xmpp');
-            $content = $body;
-        }
-        $notice = Notice::saveNew($user->id, $content, 'xmpp');
         if (is_string($notice)) {
             $this->log(LOG_ERR, $notice);
             return;