Make Herald rules subscribable

Summary: Fixes T9757.

Test Plan: Created a Herald rule and then subscribed to it with a different account.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin

Maniphest Tasks: T9757

Differential Revision: https://secure.phabricator.com/D14468

resources/sql/autopatches/20151112.herald.edge.sql

···
+CREATE TABLE {$NAMESPACE}_herald.edge (
+  src VARBINARY(64) NOT NULL,
+  type INT UNSIGNED NOT NULL,
+  dst VARBINARY(64) NOT NULL,
+  dateCreated INT UNSIGNED NOT NULL,
+  seq INT UNSIGNED NOT NULL,
+  dataID INT UNSIGNED,
+  PRIMARY KEY (src, type, dst),
+  KEY `src` (src, type, dateCreated, seq),
+  UNIQUE KEY `key_dst` (dst, type, src)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};
+
+CREATE TABLE {$NAMESPACE}_herald.edgedata (
+  id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+  data LONGTEXT NOT NULL COLLATE {$COLLATE_TEXT}
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};

src/__phutil_library_map__.php

···
       'PhabricatorFlaggableInterface',
       'PhabricatorPolicyInterface',
       'PhabricatorDestructibleInterface',
+      'PhabricatorSubscribableInterface',
     ),
     'HeraldRuleController' => 'HeraldController',
     'HeraldRuleEditor' => 'PhabricatorApplicationTransactionEditor',

src/applications/herald/storage/HeraldRule.php

···
     PhabricatorApplicationTransactionInterface,
     PhabricatorFlaggableInterface,
     PhabricatorPolicyInterface,
-    PhabricatorDestructibleInterface {
+    PhabricatorDestructibleInterface,
+    PhabricatorSubscribableInterface {
 
   const TABLE_RULE_APPLIED = 'herald_ruleapplied';
 
···
   }
 
 
+/* -(  PhabricatorSubscribableInterface  )----------------------------------- */
+
+
+  public function isAutomaticallySubscribed($phid) {
+    return $this->isPersonalRule() && $phid == $this->getAuthorPHID();
+  }
+
+  public function shouldShowSubscribersProperty() {
+    return true;
+  }
+
+  public function shouldAllowSubscription($phid) {
+    return true;
+  }
+
+
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
+
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {

src/applications/herald/storage/HeraldSchemaSpec.php

···
           'unique' => true,
         ),
       ));
+    $this->buildEdgeSchemata(new HeraldRule());
   }
 
 }