Misses this file to merge. I like the comments.

[quix0rs-gnu-social.git] / lib / activityutils.php

diff --git a/lib/activityutils.php b/lib/activityutils.php
index c2c239f1d3cc68ef32872da97835f7d8ec58710c..a0fc4872328e0f5103aea0797727098e9f5196db 100644 (file)
--- a/lib/activityutils.php
+++ b/lib/activityutils.php
@@ -300,7 +300,7 @@ class ActivityUtils
         return false;
     }
 
-    static function getFeedAuthor($feedEl)
+    static function getFeedAuthor(DOMElement $feedEl)
     {
         // Try old and deprecated activity:subject
 
@@ -346,4 +346,101 @@ class ActivityUtils
 
         return null;
     }
+
+    static function compareTypes($type, array $objects)    // this does verbs too!
+    {
+        $type = self::resolveUri($type);
+        foreach ($objects as $object) {
+            if ($type === self::resolveUri($object)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    static function resolveUri($uri, $make_relative=false)
+    {
+        if (empty($uri)) {
+            throw new ServerException('No URI to resolve in ActivityUtils::resolveUri');
+        }
+
+        if (!$make_relative && parse_url($uri, PHP_URL_SCHEME) == '') { // relative -> absolute
+            $uri = Activity::SCHEMA . $uri;
+        } elseif ($make_relative) { // absolute -> relative
+            $uri = basename($uri); //preg_replace('/^http:\/\/activitystrea\.ms\/schema\/1\.0\//', '', $uri);
+        } // absolute schemas pass through unharmed
+
+        return $uri;
+    }
+
+    static function findLocalObject(array $uris, $type=ActivityObject::NOTE) {
+        $object = null;
+        // TODO: Extend this in plugins etc.
+        if (Event::handle('StartFindLocalActivityObject', array($uris, $type, &$object))) {
+            switch (self::resolveUri($type)) {
+            case ActivityObject::PERSON:
+                // GROUP will also be here in due time...
+                $object = new Profile();
+                break;
+            default:
+                $object = new Notice();
+            }
+        }
+        foreach (array_unique($uris) as $uri) {
+            try {
+                // the exception thrown will cancel before reaching $object
+                $object = call_user_func(array($object, 'fromUri'), $uri);
+                break;
+            } catch (Exception $e) {
+                common_debug('Could not find local activity object from uri: '.$uri);
+            }
+        }
+        if (!empty($object)) {
+            Event::handle('EndFindLocalActivityObject', array($object->getUri(), $type, $object));
+        } else {
+            throw new ServerException('Could not find any activityobject stored locally with given URI');
+        }
+        return $object;
+    }
+
+    // Check authorship by supplying a Profile as a default and letting plugins
+    // set it to something else if the activity's author is actually someone
+    // else (like with a group or peopletag feed as handled in OStatus).
+    //
+    // NOTE: Returned is not necessarily the supplied profile! For example,
+    // the "feed author" may be a group, but the "activity author" is a person!
+    static function checkAuthorship(Activity $activity, Profile $profile)
+    {
+        if (Event::handle('CheckActivityAuthorship', array($activity, &$profile))) {
+            // if (empty($activity->actor)), then we generated this Activity ourselves and can trust $profile
+
+            $actor_uri = $profile->getUri();
+
+            if (!in_array($actor_uri, array($activity->actor->id, $activity->actor->link))) {
+                // A mismatch between our locally stored URI and the supplied author?
+                // Probably not more than a blog feed or something (with multiple authors or so)
+                // but log it for future inspection.
+                common_log(LOG_WARNING, "Got an actor '{$activity->actor->title}' ({$activity->actor->id}) on single-user feed for " . $actor_uri);
+            } elseif (empty($activity->actor->id)) {
+                // Plain <author> without ActivityStreams actor info.
+                // We'll just ignore this info for now and save the update under the feed's identity.
+            }
+        }
+
+        if (!$profile instanceof Profile) {
+            throw new ServerException('Could not get an author Profile for activity');
+        }
+
+        return $profile;
+    }
+
+    static public function typeToTitle($type)
+    {
+        return ucfirst(self::resolveUri($type, true));
+    }
+
+    static public function verbToTitle($verb)
+    {
+        return ucfirst(self::resolveUri($verb, true));
+    }
 }