X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;ds=sidebyside;f=lib%2Factivityutils.php;h=d4c01232ec283e8e97ae5d54dcb96040de37df60;hb=746e658f3e398948fe8c3f047e2b35ef6aa7ebd5;hp=b975a6382b60e206ab65c4e6f4aa19cd15525779;hpb=dc8068fa9eb2282b3ed3da2472860a0c0ad43daf;p=quix0rs-gnu-social.git

diff --git a/lib/activityutils.php b/lib/activityutils.php
index b975a6382b..d4c01232ec 100644
--- a/lib/activityutils.php
+++ b/lib/activityutils.php
@@ -82,13 +82,11 @@ class ActivityUtils
         $els = $element->childNodes;
 
         foreach ($els as $link) {
-
             if (!($link instanceof DOMElement)) {
                 continue;
             }
 
             if ($link->localName == self::LINK && $link->namespaceURI == self::ATOM) {
-
                 $linkRel = $link->getAttribute(self::REL);
                 $linkType = $link->getAttribute(self::TYPE);
 
@@ -106,10 +104,10 @@ class ActivityUtils
     {
         $els = $element->childNodes;
         $out = array();
-
-        foreach ($els as $link) {
+        
+        for ($i = 0; $i < $els->length; $i++) {
+            $link = $els->item($i);
             if ($link->localName == self::LINK && $link->namespaceURI == self::ATOM) {
-
                 $linkRel = $link->getAttribute(self::REL);
                 $linkType = $link->getAttribute(self::TYPE);
 
@@ -147,6 +145,34 @@ class ActivityUtils
         }
     }
 
+    /**
+     * Gets all immediate child elements with the given tag
+     *
+     * @param DOMElement $element   element to pick at
+     * @param string     $tag       tag to look for
+     * @param string     $namespace Namespace to look under
+     *
+     * @return array found element or null
+     */
+
+    static function children(DOMNode $element, $tag, $namespace=self::ATOM)
+    {
+        $results = array();
+
+        $els = $element->childNodes;
+
+        if (!empty($els) && $els->length > 0) {
+            for ($i = 0; $i < $els->length; $i++) {
+                $el = $els->item($i);
+                if ($el->localName == $tag && $el->namespaceURI == $namespace) {
+                    $results[] = $el;
+                }
+            }
+        }
+
+        return $results;
+    }
+
     /**
      * Grab the text content of a DOM element child of the current element
      *
@@ -273,4 +299,148 @@ class ActivityUtils
 
         return false;
     }
+
+    static function getFeedAuthor($feedEl)
+    {
+        // Try old and deprecated activity:subject
+
+        $subject = ActivityUtils::child($feedEl, Activity::SUBJECT, Activity::SPEC);
+
+        if (!empty($subject)) {
+            return new ActivityObject($subject);
+        }
+
+        // Try the feed author
+
+        $author = ActivityUtils::child($feedEl, Activity::AUTHOR, Activity::ATOM);
+
+        if (!empty($author)) {
+            return new ActivityObject($author);
+        }
+
+        // Sheesh. Not a very nice feed! Let's try fingerpoken in the
+        // entries.
+
+        $entries = $feedEl->getElementsByTagNameNS(Activity::ATOM, 'entry');
+
+        if (!empty($entries) && $entries->length > 0) {
+
+            $entry = $entries->item(0);
+
+            // Try the (deprecated) activity:actor
+
+            $actor = ActivityUtils::child($entry, Activity::ACTOR, Activity::SPEC);
+
+            if (!empty($actor)) {
+                return new ActivityObject($actor);
+            }
+
+            // Try the author
+
+            $author = ActivityUtils::child($entry, Activity::AUTHOR, Activity::ATOM);
+
+            if (!empty($author)) {
+                return new ActivityObject($author);
+            }
+        }
+
+        return null;
+    }
+
+    static function compareTypes($type, $objects)    // this does verbs too!
+    {
+        $type = self::resolveUri($type);
+        foreach ((array)$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));
+    }
 }