Build basic infrastructure for an activity feed

Summary: This defines an extremely basic version of an activity feed, like
Facebook's news feed. It doesn't do much of interest yet.
Test Plan: Published some feed stories:
https://secure.phabricator.com/file/view/PHID-FILE-5061aa72105bbdc05b21/
Reviewed By: tuomaspelkonen
Reviewers: jungejason, tuomaspelkonen, aran
Commenters: codeblock, jungejason
CC: aran, epriestley, codeblock, tuomaspelkonen, jungejason
Differential Revision: 593

src/__phutil_library_map__.php

@@ -103,6 +103,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_updateunitresults_Method' => 'applications/conduit/method/differential/updateunitresults',
     'ConduitAPI_diffusion_getcommits_Method' => 'applications/conduit/method/diffusion/getcommits',
     'ConduitAPI_diffusion_getrecentcommitsbypath_Method' => 'applications/conduit/method/diffusion/getrecentcommitsbypath',
+    'ConduitAPI_feed_publish_Method' => 'applications/conduit/method/feed/publish',
     'ConduitAPI_file_download_Method' => 'applications/conduit/method/file/download',
     'ConduitAPI_file_upload_Method' => 'applications/conduit/method/file/upload',
     'ConduitAPI_maniphest_info_Method' => 'applications/conduit/method/maniphest/info',
@@ -336,6 +337,17 @@ phutil_register_library_map(array(
     'PhabricatorEmailLoginController' => 'applications/auth/controller/email',
     'PhabricatorEmailTokenController' => 'applications/auth/controller/emailtoken',
     'PhabricatorEnv' => 'infrastructure/env',
+    'PhabricatorFeedController' => 'applications/feed/controller/base',
+    'PhabricatorFeedDAO' => 'applications/feed/storage/base',
+    'PhabricatorFeedQuery' => 'applications/feed/query',
+    'PhabricatorFeedStory' => 'applications/feed/story/base',
+    'PhabricatorFeedStoryData' => 'applications/feed/storage/story',
+    'PhabricatorFeedStoryPublisher' => 'applications/feed/publisher',
+    'PhabricatorFeedStoryReference' => 'applications/feed/storage/storyreference',
+    'PhabricatorFeedStoryUnknown' => 'applications/feed/story/unknown',
+    'PhabricatorFeedStoryView' => 'applications/feed/view/story',
+    'PhabricatorFeedStreamController' => 'applications/feed/controller/stream',
+    'PhabricatorFeedView' => 'applications/feed/view/base',
     'PhabricatorFile' => 'applications/files/storage/file',
     'PhabricatorFileController' => 'applications/files/controller/base',
     'PhabricatorFileDAO' => 'applications/files/storage/base',
@@ -662,6 +674,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_updateunitresults_Method' => 'ConduitAPIMethod',
     'ConduitAPI_diffusion_getcommits_Method' => 'ConduitAPIMethod',
     'ConduitAPI_diffusion_getrecentcommitsbypath_Method' => 'ConduitAPIMethod',
+    'ConduitAPI_feed_publish_Method' => 'ConduitAPIMethod',
     'ConduitAPI_file_download_Method' => 'ConduitAPIMethod',
     'ConduitAPI_file_upload_Method' => 'ConduitAPIMethod',
     'ConduitAPI_maniphest_info_Method' => 'ConduitAPIMethod',
@@ -831,6 +844,14 @@ phutil_register_library_map(array(
     'PhabricatorEditPreferencesController' => 'PhabricatorPreferencesController',
     'PhabricatorEmailLoginController' => 'PhabricatorAuthController',
     'PhabricatorEmailTokenController' => 'PhabricatorAuthController',
+    'PhabricatorFeedController' => 'PhabricatorController',
+    'PhabricatorFeedDAO' => 'PhabricatorLiskDAO',
+    'PhabricatorFeedStoryData' => 'PhabricatorFeedDAO',
+    'PhabricatorFeedStoryReference' => 'PhabricatorFeedDAO',
+    'PhabricatorFeedStoryUnknown' => 'PhabricatorFeedStory',
+    'PhabricatorFeedStoryView' => 'PhabricatorFeedView',
+    'PhabricatorFeedStreamController' => 'PhabricatorFeedController',
+    'PhabricatorFeedView' => 'AphrontView',
     'PhabricatorFile' => 'PhabricatorFileDAO',
     'PhabricatorFileController' => 'PhabricatorController',
     'PhabricatorFileDAO' => 'PhabricatorLiskDAO',

src/aphront/default/configuration/AphrontDefaultApplicationConfiguration.php

@@ -330,6 +330,10 @@ class AphrontDefaultApplicationConfiguration
         'delete/(?P<id>\d+)/$'
           => 'PhabricatorCountdownDeleteController'
       ),
+
+      '/feed/' => array(
+        '$' => 'PhabricatorFeedStreamController',
+      ),
     );
   }
 

src/applications/conduit/method/feed/publish/ConduitAPI_feed_publish_Method.php

@@ -0,0 +1,65 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @group conduit
+ */
+class ConduitAPI_feed_publish_Method extends ConduitAPIMethod {
+
+  public function getMethodDescription() {
+    return "(UNSTABLE!!!) Publish a story to the feed.";
+  }
+
+  public function defineParamTypes() {
+    return array(
+      'type' => 'required string',
+      'data' => 'required dict',
+      'time' => 'optional int',
+    );
+  }
+
+  public function defineErrorTypes() {
+    return array(
+    );
+  }
+
+  public function defineReturnType() {
+    return 'nonempty phid';
+  }
+
+  protected function execute(ConduitAPIRequest $request) {
+    $type = $request->getValue('type');
+    $data = $request->getValue('data');
+    $time = $request->getValue('time');
+
+    $author_phid = $request->getUser()->getPHID();
+    $phids = array($author_phid);
+
+    $publisher = new PhabricatorFeedStoryPublisher();
+    $publisher->setStoryType($type);
+    $publisher->setStoryData($data);
+    $publisher->setStoryTime($time);
+    $publisher->setRelatedPHIDs($phids);
+    $publisher->setStoryAuthorPHID($author_phid);
+
+    $data = $publisher->publish();
+
+    return $data->getPHID();
+  }
+
+}

src/applications/conduit/method/feed/publish/__init__.php

@@ -0,0 +1,13 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/conduit/method/base');
+phutil_require_module('phabricator', 'applications/feed/publisher');
+
+
+phutil_require_source('ConduitAPI_feed_publish_Method.php');

src/applications/feed/controller/base/PhabricatorFeedController.php

@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class PhabricatorFeedController extends PhabricatorController {
+
+  public function buildStandardPageResponse($view, array $data) {
+    $page = $this->buildStandardPageView();
+
+    $page->setApplicationName('Feed');
+    $page->setBaseURI('/feed/');
+    $page->setTitle(idx($data, 'title'));
+    $page->setGlyph("\xE2\x88\x9E");
+    $page->appendChild($view);
+
+    $response = new AphrontWebpageResponse();
+    return $response->setContent($page->render());
+  }
+
+}

src/applications/feed/controller/base/__init__.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'aphront/response/webpage');
+phutil_require_module('phabricator', 'applications/base/controller/base');
+
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('PhabricatorFeedController.php');

src/applications/feed/controller/stream/PhabricatorFeedStreamController.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class PhabricatorFeedStreamController extends PhabricatorFeedController {
+
+  public function processRequest() {
+
+    $query = new PhabricatorFeedQuery();
+    $stories = $query->execute();
+
+    $views = array();
+    foreach ($stories as $story) {
+      $views[] = $story->renderView();
+    }
+
+    return $this->buildStandardPageResponse(
+      $views,
+      array(
+        'title' => 'Feed',
+      ));
+  }
+}

src/applications/feed/controller/stream/__init__.php

@@ -0,0 +1,13 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/feed/controller/base');
+phutil_require_module('phabricator', 'applications/feed/query');
+
+
+phutil_require_source('PhabricatorFeedStreamController.php');

src/applications/feed/publisher/PhabricatorFeedStoryPublisher.php

@@ -0,0 +1,113 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class PhabricatorFeedStoryPublisher {
+
+  private $relatedPHIDs;
+  private $storyType;
+  private $storyData;
+  private $storyTime;
+  private $storyAuthorPHID;
+
+  public function setRelatedPHIDs(array $phids) {
+    $this->relatedPHIDs = $phids;
+    return $this;
+  }
+
+  public function setStoryType($story_type) {
+    $this->storyType = $story_type;
+    return $this;
+  }
+
+  public function setStoryData(array $data) {
+    $this->storyData = $data;
+    return $this;
+  }
+
+  public function setStoryTime($time) {
+    $this->storyTime = $time;
+    return $this;
+  }
+
+  public function setStoryAuthorPHID($phid) {
+    $this->storyAuthorPHID = $phid;
+    return $this;
+  }
+
+  public function publish() {
+    if (!$this->relatedPHIDs) {
+      throw new Exception("There are no PHIDs related to this story!");
+    }
+
+    if (!$this->storyType) {
+      throw new Exception("Call setStoryType() before publishing!");
+    }
+
+    $chrono_key = $this->generateChronologicalKey();
+
+    $story = new PhabricatorFeedStoryData();
+    $story->setStoryType($this->storyType);
+    $story->setStoryData($this->storyData);
+    $story->setAuthorPHID($this->storyAuthorPHID);
+    $story->setChronologicalKey($chrono_key);
+    $story->save();
+
+    $ref = new PhabricatorFeedStoryReference();
+
+    $sql = array();
+    $conn = $ref->establishConnection('w');
+    foreach ($this->relatedPHIDs as $phid) {
+      $sql[] = qsprintf(
+        $conn,
+        '(%s, %s)',
+        $phid,
+        $chrono_key);
+    }
+
+    queryfx(
+      $conn,
+      'INSERT INTO %T (objectPHID, chronologicalKey) VALUES %Q',
+      $ref->getTableName(),
+      implode(', ', $sql));
+
+    return $story;
+  }
+
+  /**
+   * We generate a unique chronological key for each story type because we want
+   * to be able to page through the stream with a cursor (i.e., select stories
+   * after ID = X) so we can efficiently perform filtering after selecting data,
+   * and multiple stories with the same ID make this cumbersome without putting
+   * a bunch of logic in the client. We could use the primary key, but that
+   * would prevent publishing stories which happened in the past. Since it's
+   * potentially useful to do that (e.g., if you're importing another data
+   * source) build a unique key for each story which has chronological ordering.
+   *
+   * @return string A unique, time-ordered key which identifies the story.
+   */
+  private function generateChronologicalKey() {
+    // Use the epoch timestamp for the upper 32 bits of the key. Default to
+    // the current time if the story doesn't have an explicit timestamp.
+    $time = nonempty($this->storyTime, time());
+
+    // Generate a random number for the lower 32 bits of the key.
+    $rand = head(unpack('L', Filesystem::readRandomBytes(4)));
+
+    return ($time << 32) + ($rand);
+  }
+}

src/applications/feed/publisher/__init__.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/feed/storage/story');
+phutil_require_module('phabricator', 'applications/feed/storage/storyreference');
+phutil_require_module('phabricator', 'storage/qsprintf');
+phutil_require_module('phabricator', 'storage/queryfx');
+
+phutil_require_module('phutil', 'filesystem');
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('PhabricatorFeedStoryPublisher.php');

src/applications/feed/query/PhabricatorFeedQuery.php

@@ -0,0 +1,95 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class PhabricatorFeedQuery {
+
+  private $filterPHIDs;
+  private $limit = 100;
+  private $after;
+
+  public function setFilterPHIDs(array $phids) {
+    $this->filterPHIDs = $phids;
+    return $this;
+  }
+
+  public function setLimit($limit) {
+    $this->limit = $limit;
+    return $this;
+  }
+
+  public function setAfter($after) {
+    $this->after = $after;
+    return $this;
+  }
+
+  public function execute() {
+
+    $ref_table = new PhabricatorFeedStoryReference();
+    $story_table = new PhabricatorFeedStoryData();
+
+    $conn = $story_table->establishConnection('r');
+
+    $where = array();
+    if ($this->filterPHIDs) {
+      $where[] = qsprintf(
+        $conn,
+        'ref.objectPHID IN (%Ls)',
+        $this->filterPHIDs);
+    }
+
+    if ($where) {
+      $where = 'WHERE ('.implode(') AND (', $where).')';
+    } else {
+      $where = '';
+    }
+
+    $data = queryfx_all(
+      $conn,
+      'SELECT story.* FROM %T ref
+        JOIN %T story ON ref.chronologicalKey = story.chronologicalKey
+        %Q
+        GROUP BY story.chronologicalKey
+        ORDER BY story.chronologicalKey DESC
+        LIMIT %d',
+      $ref_table->getTableName(),
+      $story_table->getTableName(),
+      $where,
+      $this->limit);
+    $data = $story_table->loadAllFromArray($data);
+
+    $stories = array();
+    foreach ($data as $story_data) {
+      $class = $story_data->getStoryType();
+
+      try {
+        if (!class_exists($class) ||
+            !is_subclass_of($class, 'PhabricatorFeedStory')) {
+          $class = 'PhabricatorFeedStoryUnknown';
+        }
+      } catch (PhutilMissingSymbolException $ex) {
+        // If the class can't be loaded, libphutil will throw an exception.
+        // Render the story using the unknown story view.
+        $class = 'PhabricatorFeedStoryUnknown';
+      }
+
+      $stories[] = newv($class, array($story_data));
+    }
+
+    return $stories;
+  }
+}

src/applications/feed/query/__init__.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/feed/storage/story');
+phutil_require_module('phabricator', 'applications/feed/storage/storyreference');
+phutil_require_module('phabricator', 'storage/qsprintf');
+phutil_require_module('phabricator', 'storage/queryfx');
+
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('PhabricatorFeedQuery.php');

src/applications/feed/storage/base/PhabricatorFeedDAO.php

@@ -0,0 +1,25 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class PhabricatorFeedDAO extends PhabricatorLiskDAO {
+
+  public function getApplicationName() {
+    return 'feed';
+  }
+
+}

src/applications/feed/storage/base/__init__.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/base/storage/lisk');
+
+
+phutil_require_source('PhabricatorFeedDAO.php');

src/applications/feed/storage/story/PhabricatorFeedStoryData.php

@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class PhabricatorFeedStoryData extends PhabricatorFeedDAO {
+
+  protected $phid;
+
+  protected $storyType;
+  protected $storyData;
+  protected $authorPHID;
+  protected $chronologicalKey;
+
+  public function getConfiguration() {
+    return array(
+      self::CONFIG_AUX_PHID       => true,
+      self::CONFIG_SERIALIZATION  => array(
+        'storyData'  => self::SERIALIZATION_JSON,
+      ),
+    ) + parent::getConfiguration();
+  }
+
+  public function generatePHID() {
+    return PhabricatorPHID::generateNewPHID(
+      PhabricatorPHIDConstants::PHID_TYPE_STRY);
+  }
+
+}

src/applications/feed/storage/story/__init__.php

@@ -0,0 +1,14 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/feed/storage/base');
+phutil_require_module('phabricator', 'applications/phid/constants');
+phutil_require_module('phabricator', 'applications/phid/storage/phid');
+
+
+phutil_require_source('PhabricatorFeedStoryData.php');

src/applications/feed/storage/storyreference/PhabricatorFeedStoryReference.php

@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class PhabricatorFeedStoryReference extends PhabricatorFeedDAO {
+
+  protected $objectPHID;
+  protected $chronologicalKey;
+
+  public function getConfiguration() {
+    return array(
+      self::CONFIG_IDS          => self::IDS_MANUAL,
+      self::CONFIG_TIMESTAMPS   => false,
+    ) + parent::getConfiguration();
+  }
+
+}

src/applications/feed/storage/storyreference/__init__.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/feed/storage/base');
+
+
+phutil_require_source('PhabricatorFeedStoryReference.php');

src/applications/feed/story/base/PhabricatorFeedStory.php

@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class PhabricatorFeedStory {
+
+  private $data;
+
+  final public function __construct(PhabricatorFeedStoryData $data) {
+    $this->data = $data;
+  }
+
+  abstract public function renderView();
+
+}

src/applications/feed/story/base/__init__.php

@@ -0,0 +1,10 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+
+phutil_require_source('PhabricatorFeedStory.php');

src/applications/feed/story/unknown/PhabricatorFeedStoryUnknown.php

@@ -0,0 +1,25 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class PhabricatorFeedStoryUnknown extends PhabricatorFeedStory {
+
+  public function renderView() {
+    return new PhabricatorFeedStoryView();
+  }
+
+}

src/applications/feed/story/unknown/__init__.php

@@ -0,0 +1,13 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/feed/story/base');
+phutil_require_module('phabricator', 'applications/feed/view/story');
+
+
+phutil_require_source('PhabricatorFeedStoryUnknown.php');

src/applications/feed/view/base/PhabricatorFeedView.php

@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class PhabricatorFeedView extends AphrontView {
+
+}

src/applications/feed/view/base/__init__.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'view/base');
+
+
+phutil_require_source('PhabricatorFeedView.php');

src/applications/feed/view/story/PhabricatorFeedStoryView.php

@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class PhabricatorFeedStoryView extends PhabricatorFeedView {
+
+  public function render() {
+    return phutil_render_tag(
+      'div',
+      array(
+        'style' => 'border: 1px dashed black; '.
+                   'padding: 1em; margin: 1em; '.
+                   'background: #ffeedd;',
+      ),
+      'This is a feed story!');
+  }
+
+}

src/applications/feed/view/story/__init__.php

@@ -0,0 +1,14 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/feed/view/base');
+
+phutil_require_module('phutil', 'markup');
+
+
+phutil_require_source('PhabricatorFeedStoryView.php');

src/applications/phid/constants/PhabricatorPHIDConstants.php

@@ -30,6 +30,7 @@ final class PhabricatorPHIDConstants {
   const PHID_TYPE_CMIT    = 'CMIT';
   const PHID_TYPE_OPKG    = 'OPKG';
   const PHID_TYPE_PSTE    = 'PSTE';
+  const PHID_TYPE_STRY    = 'STRY';
 
   public static function getTypes() {
     return array(
@@ -44,6 +45,8 @@ final class PhabricatorPHIDConstants {
       self::PHID_TYPE_REPO,
       self::PHID_TYPE_CMIT,
       self::PHID_TYPE_PSTE,
+      self::PHID_TYPE_OPKG,
+      self::PHID_TYPE_STRY,
     );
   }
 }