Fix some bot issues

Summary:
  - Deprecate differentialnotification in favor of feednotification; it's strictly better.
  - Fix feed notification + channels.
  - Fix rendering of new-style stories (pholio, macro), which currently fatal.

Test Plan: See chatlog.

Reviewers: codeblock, indiefan

Reviewed By: codeblock

CC: aran

Differential Revision: https://secure.phabricator.com/D4981

Author: epriestley

src/applications/transactions/feed/PhabricatorApplicationTransactionFeedStory.php

@@ -48,4 +48,9 @@ public function renderView() {
     return $view;
   }
 
+  public function renderText() {
+    // TODO: This is grotesque; the feed notification handler relies on it.
+    return strip_tags($this->renderView()->render());
+  }
+
 }

src/infrastructure/daemon/bot/handler/PhabricatorBotDifferentialNotificationHandler.php

@@ -1,55 +1,18 @@
 <?php
 
 /**
- * @group irc
+ * @deprecated
  */
 final class PhabricatorBotDifferentialNotificationHandler
-extends PhabricatorBotHandler {
-
-  private $skippedOldEvents;
+  extends PhabricatorBotHandler {
 
   public function receiveMessage(PhabricatorBotMessage $message) {
-    return;
-  }
-
-  public function runBackgroundTasks() {
-    $iterator = new PhabricatorTimelineIterator('ircdiffx', array('difx'));
-    $show = $this->getConfig('notification.actions');
-
-    if (!$this->skippedOldEvents) {
-      // Since we only want to post notifications about new events, skip
-      // everything that's happened in the past when we start up so we'll
-      // only process real-time events.
-      foreach ($iterator as $event) {
-        // Ignore all old events.
-      }
-      $this->skippedOldEvents = true;
-      return;
-    }
-
-    foreach ($iterator as $event) {
-      $data = $event->getData();
-      if (!$data || ($show !== null && !in_array($data['action'], $show))) {
-        continue;
-      }
-
-      $actor_phid = $data['actor_phid'];
-      $phids = array($actor_phid);
-      $handles = id(new PhabricatorObjectHandleData($phids))->loadHandles();
-      $verb = DifferentialAction::getActionPastTenseVerb($data['action']);
-
-      $actor_name = $handles[$actor_phid]->getName();
-      $message_body =
-        "{$actor_name} {$verb} revision D".$data['revision_id'].".";
-
-      $channels = $this->getConfig('notification.channels', array());
-      foreach ($channels as $channel) {
-        $this->writeMessage(
-          id(new PhabricatorBotMessage())
-          ->setCommand('MESSAGE')
-          ->setTarget($channel)
-          ->setBody($message_body));
-      }
+    static $notified;
+    if (!$notified) {
+      phlog(
+        'PhabricatorBotDifferentialNotificationHandler is deprecated, use '.
+        'PhabricatorBotFeedNotificationHandler instead.');
+      $notified = true;
     }
   }
 

src/infrastructure/daemon/bot/handler/PhabricatorBotFeedNotificationHandler.php

@@ -149,7 +149,11 @@ public function runBackgroundTasks() {
         }
 
         $channels = $this->getConfig('join');
-        foreach ($channels as $channel) {
+        foreach ($channels as $channel_name) {
+
+          $channel = id(new PhabricatorBotChannel())
+            ->setName($channel_name);
+
           $this->writeMessage(
             id(new PhabricatorBotMessage())
             ->setCommand('MESSAGE')