First cut at some JSON Activity Streams output

actions/apitimelinefriends.php

@@ -263,6 +263,12 @@ class ApiTimelineFriendsAction extends ApiBareAuthAction
         case 'json':
             $this->showJsonTimeline($this->notices);
             break;
+        case 'as':
+            header('Content-Type: application/json; charset=utf-8');
+            $doc = new ActivityStreamJSONDocument($this->auth_user);
+            $doc->addItemsFromNotices($this->notices);
+            $this->raw($doc->asString());
+            break;
         default:
             // TRANS: Client error displayed when trying to handle an unknown API method.
             $this->clientError(_('API method not found.'), $code = 404);

classes/Notice.php

@@ -1252,18 +1252,19 @@ class Notice extends Memcached_DataObject
 
     function asActivity()
     {
+                common_debug("a");
+
         $act = self::cacheGet(Cache::codeKey('notice:as-activity:'.$this->id));
 
         if (!empty($act)) {
             return $act;
         }
-
         $act = new Activity();
 
         if (Event::handle('StartNoticeAsActivity', array($this, &$act))) {
 
             $profile = $this->getProfile();
-
+            common_debug('b');
             $act->actor     = ActivityObject::fromProfile($profile);
             $act->verb      = ActivityVerb::POST;
             $act->objects[] = ActivityObject::fromNotice($this);

lib/activity.php

@@ -337,6 +337,59 @@ class Activity
         return null;
     }
 
+    /**
+     * Returns an array based on this activity suitable
+     * for encoding as a JSON object
+     *
+     * @return array $activity
+     */
+
+    function asArray()
+    {
+        $activity = array();
+
+        // actor
+        $activity['actor'] = $this->actor->asArray();
+
+        // body
+        $activity['body'] = $this->content;
+
+        // generator <--- might be useful; might be too much junk
+
+        // icon <-- should we use this?
+
+        // object
+        if ($this->verb == ActivityVerb::POST && count($this->objects) == 1) {
+            $activity['object'] = $this->objects[0]->asArray();
+        } else {
+            $activity['object'] = array();
+            foreach($this->objects as $object) {
+                $activity['object'][] = $object->asArray();
+            }
+        }
+
+        $activity['postedTime'] = self::iso8601Date($this->time); // Change to exactly be RFC3339?
+
+        // provider <--- again not sure we should use this
+
+        // target
+        if (!empty($this->target)) {
+            $activity['target'] = $this->target->asArray();
+        }
+
+        // title
+        $activity['title'] = $this->title;
+
+        // updatedTime <-- should we use? spec says activity MAY have this
+
+        // verb
+        $activity['verb'] = $this->verb;
+
+        // TODO: extensions (ActivityContext, OStatus stuff, etc.)
+
+        return $activity;
+    }
+
     function asString($namespace=false, $author=true, $source=false)
     {
         $xs = new XMLStringer(true);

lib/activityobject.php

@@ -179,7 +179,7 @@ class ActivityObject
         if (empty($this->type)) {
             $this->type = self::PERSON; // XXX: is this fair?
         }
-        
+
         // start with <atom:title>
 
         $title = ActivityUtils::childHtmlContent($element, self::TITLE);
@@ -419,7 +419,7 @@ class ActivityObject
     static function fromNotice(Notice $notice)
     {
         $object = new ActivityObject();
-		
+
 		if (Event::handle('StartActivityObjectFromNotice', array($notice, &$object))) {
 
 			$object->type    = ActivityObject::NOTE;
@@ -526,7 +526,7 @@ class ActivityObject
 
         return $object;
     }
-	
+
 	function outputTo($xo, $tag='activity:object')
 	{
 		if (!empty($tag)) {
@@ -633,4 +633,46 @@ class ActivityObject
 
         return $xs->getString();
     }
+
+    /*
+     * Returns an array based on this Activity Object suitable for
+     * encoding as JSON.
+     *
+     * @return array $object the activity object array
+     */
+
+    function asArray()
+    {
+        $object = array();
+
+        // TODO: attachedObjects
+
+        // displayName
+        $object['displayName'] = $this->title;
+
+
+        // TODO: downstreamDuplicates
+        // TODO: embedCode
+
+        // id
+        $object['id'] = $this->id;
+
+        // TODO: image
+        // Need to make MediaLink serialization
+
+        // objectType
+        $object['type'] = $this->type;
+
+        // summary
+        $object['summary'] = $this->summary;
+
+        // TODO: upstreamDuplicates
+
+        // url (XXX: need to put the right thing here...)
+        $object['url'] = $this->id;
+
+        // TODO: extensions (OStatus stuff, etc.)
+
+        return $object;
+    }
 }

lib/activitystreamjsondocument.php

@@ -0,0 +1,112 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Class for serializing Activity Streams in JSON
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Feed
+ * @package   StatusNet
+ * @author    Zach Copley <zach@status.net>
+ * @copyright 2011 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET'))
+{
+    exit(1);
+}
+
+/**
+ * A class for generating JSON documents that represent an Activity Streams
+ *
+ * @category Feed
+ * @package  StatusNet
+ * @author   Zach Copley <zach@status.net>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://status.net/
+ */
+class ActivityStreamJSONDocument
+{
+    /* Top level array representing the document */
+    protected $doc = array();
+
+    /* The current authenticated user */
+    protected $cur = null;
+
+    /**
+     * Constructor
+     *
+     * @param User $cur the current authenticated user
+     */
+
+    function __construct($cur = null)
+    {
+        $this->cur = $cur;
+
+        $this->doc['items'] = array();
+    }
+
+    /**
+     * Add more than one Item to the document
+     *
+     * @param mixed $notices an array of Notice objects or handle
+     *
+     */
+
+    function addItemsFromNotices($notices)
+    {
+        common_debug("addItemsFromNotices");
+        if (is_array($notices)) {
+            foreach ($notices as $notice) {
+                $this->addItemFromNotice($notice);
+            }
+        } else {
+            while ($notices->fetch()) {
+                $this->addItemFromNotice($notices);
+            }
+        }
+    }
+
+    /**
+     * Add a single Notice to the document
+     *
+     * @param Notice $notice a Notice to add
+     */
+
+    function addItemFromNotice($notice)
+    {
+        $cur = empty($this->cur) ? common_current_user() : $this->cur;
+
+        $act          = $notice->asActivity();
+        $act->extra[] = $notice->noticeInfo($cur);
+
+        array_push($this->doc['items'], $act->asArray());
+    }
+
+    /*
+     * Return the entire document as a big string of JSON
+     *
+     * @return string encoded JSON output
+     */
+    function asString()
+    {
+        return json_encode($this->doc);
+    }
+
+}

lib/router.php

@@ -411,7 +411,7 @@ class Router
 
             $m->connect('api/statuses/friends_timeline.:format',
                         array('action' => 'ApiTimelineFriends',
-                              'format' => '(xml|json|rss|atom)'));
+                              'format' => '(xml|json|rss|atom|as)'));
 
             $m->connect('api/statuses/friends_timeline/:id.:format',
                         array('action' => 'ApiTimelineFriends',