OStatus profile setup cleanup

* drop OStatusPlugin::localProfileFromUrl(), we can just look up on user.uri
* clean up a few edge cases that returned null through Ostatus_profile::ensure* code paths, now throws clear exception when we can't find a feed from the given profile url
* add some doc comments on the ensure* methods

plugins/OStatus/OStatusPlugin.php

@@ -947,23 +947,4 @@ class OStatusPlugin extends Plugin
         }
         return false;
     }
-
-    /**
-     * Utility function to check if the given URL is a canonical user profile
-     * page, and if so return the ID number.
-     *
-     * @param string $url
-     * @return mixed int or false
-     */
-    public static function localProfileFromUrl($url)
-    {
-        $template = common_local_url('userbyid', array('id' => '31337'));
-        $template = preg_quote($template, '/');
-        $template = str_replace('31337', '(\d+)', $template);
-        if (preg_match("/$template/", $url, $matches)) {
-            return intval($matches[1]);
-        }
-        return false;
-    }
-
 }

plugins/OStatus/classes/Ostatus_profile.php

@@ -700,9 +700,13 @@ class Ostatus_profile extends Memcached_DataObject
     }
 
     /**
+     * Look up and if necessary create an Ostatus_profile for the remote entity
+     * with the given profile page URL. This should never return null -- you
+     * will either get an object or an exception will be thrown.
+     *
      * @param string $profile_url
      * @return Ostatus_profile
-     * @throws FeedSubException
+     * @throws Exception
      */
 
     public static function ensureProfileURL($profile_url, $hints=array())
@@ -723,7 +727,7 @@ class Ostatus_profile extends Memcached_DataObject
         $response = $client->get($profile_url);
 
         if (!$response->isOk()) {
-            return null;
+            throw new Exception("Could not reach profile page: " . $profile_url);
         }
 
         // Check if we have a non-canonical URL
@@ -777,11 +781,20 @@ class Ostatus_profile extends Memcached_DataObject
 
         if (!empty($feedurl)) {
             $hints['feedurl'] = $feedurl;
-
             return self::ensureFeedURL($feedurl, $hints);
         }
+
+        throw new Exception("Could not find a feed URL for profile page " . $finalUrl);
     }
 
+    /**
+     * Look up the Ostatus_profile, if present, for a remote entity with the
+     * given profile page URL. Will return null for both unknown and invalid
+     * remote profiles.
+     *
+     * @return mixed Ostatus_profile or null
+     * @throws Exception for local profiles
+     */
     static function getFromProfileURL($profile_url)
     {
         $profile = Profile::staticGet('profileurl', $profile_url);
@@ -813,6 +826,14 @@ class Ostatus_profile extends Memcached_DataObject
         return null;
     }
 
+    /**
+     * Look up and if necessary create an Ostatus_profile for remote entity
+     * with the given update feed. This should never return null -- you will
+     * either get an object or an exception will be thrown.
+     *
+     * @return Ostatus_profile
+     * @throws Exception
+     */
     public static function ensureFeedURL($feed_url, $hints=array())
     {
         $discover = new FeedDiscovery();
@@ -841,6 +862,18 @@ class Ostatus_profile extends Memcached_DataObject
         }
     }
 
+    /**
+     * Look up and, if necessary, create an Ostatus_profile for the remote
+     * profile with the given Atom feed - actually loaded from the feed.
+     * This should never return null -- you will either get an object or
+     * an exception will be thrown.
+     *
+     * @param DOMElement $feedEl root element of a loaded Atom feed
+     * @param array $hints additional discovery information passed from higher levels
+     * @fixme should this be marked public?
+     * @return Ostatus_profile
+     * @throws Exception
+     */
     public static function ensureAtomFeed($feedEl, $hints)
     {
         // Try to get a profile from the feed activity:subject
@@ -891,6 +924,18 @@ class Ostatus_profile extends Memcached_DataObject
         throw new FeedSubException("Can't find enough profile information to make a feed.");
     }
 
+    /**
+     * Look up and, if necessary, create an Ostatus_profile for the remote
+     * profile with the given RSS feed - actually loaded from the feed.
+     * This should never return null -- you will either get an object or
+     * an exception will be thrown.
+     *
+     * @param DOMElement $feedEl root element of a loaded RSS feed
+     * @param array $hints additional discovery information passed from higher levels
+     * @fixme should this be marked public?
+     * @return Ostatus_profile
+     * @throws Exception
+     */
     public static function ensureRssChannel($feedEl, $hints)
     {
         // Special-case for Posterous. They have some nice metadata in their
@@ -1054,11 +1099,14 @@ class Ostatus_profile extends Memcached_DataObject
     /**
      * Fetch, or build if necessary, an Ostatus_profile for the actor
      * in a given Activity Streams activity.
+     * This should never return null -- you will either get an object or
+     * an exception will be thrown.
      *
      * @param Activity $activity
      * @param string $feeduri if we already know the canonical feed URI!
      * @param string $salmonuri if we already know the salmon return channel URI
      * @return Ostatus_profile
+     * @throws Exception
      */
 
     public static function ensureActorProfile($activity, $hints=array())
@@ -1066,6 +1114,18 @@ class Ostatus_profile extends Memcached_DataObject
         return self::ensureActivityObjectProfile($activity->actor, $hints);
     }
 
+    /**
+     * Fetch, or build if necessary, an Ostatus_profile for the profile
+     * in a given Activity Streams object (can be subject, actor, or object).
+     * This should never return null -- you will either get an object or
+     * an exception will be thrown.
+     *
+     * @param ActivityObject $object
+     * @param array $hints additional discovery information passed from higher levels
+     * @return Ostatus_profile
+     * @throws Exception
+     */
+
     public static function ensureActivityObjectProfile($object, $hints=array())
     {
         $profile = self::getActivityObjectProfile($object);
@@ -1121,6 +1181,8 @@ class Ostatus_profile extends Memcached_DataObject
     /**
      * Create local ostatus_profile and profile/user_group entries for
      * the provided remote user or group.
+     * This should never return null -- you will either get an object or
+     * an exception will be thrown.
      *
      * @param ActivityObject $object
      * @param array $hints
@@ -1137,7 +1199,8 @@ class Ostatus_profile extends Memcached_DataObject
             throw new Exception("No profile URI");
         }
 
-        if (OStatusPlugin::localProfileFromUrl($homeuri)) {
+        $user = User::staticGet('uri', $homeuri);
+        if ($user) {
             throw new Exception("Local user can't be referenced as remote.");
         }
 
@@ -1437,6 +1500,11 @@ class Ostatus_profile extends Memcached_DataObject
     }
 
     /**
+     * Look up, and if necessary create, an Ostatus_profile for the remote
+     * entity with the given webfinger address.
+     * This should never return null -- you will either get an object or
+     * an exception will be thrown.
+     *
      * @param string $addr webfinger address
      * @return Ostatus_profile
      * @throws Exception on error conditions