Prepare revision mail for the "Draft" status

Summary:
Ref T2543. Currently, we always do some special things when a revision is created, mostly adding more stuff to the mail.

With drafts, we want to suppress initial mail and send this big, rich mail only when the revision actually moves out of "draft".

Prepare the code for this, with the actual methods hard-coded to the current behavior. This will probably take some tweaking but I think I got most of it.

Test Plan: Banged around in Differential so it sent some mail, saw normal mail without anything new.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T2543

Differential Revision: https://secure.phabricator.com/D18627

src/applications/differential/customfield/DifferentialChangesSinceLastUpdateField.php

@@ -24,7 +24,7 @@ final class DifferentialChangesSinceLastUpdateField
     PhabricatorApplicationTransactionEditor $editor,
     array $xactions) {
 
-    if ($editor->getIsNewObject()) {
+    if ($editor->isFirstBroadcast()) {
       return;
     }
 

src/applications/differential/customfield/DifferentialSummaryField.php

@@ -67,7 +67,7 @@ final class DifferentialSummaryField
     PhabricatorApplicationTransactionEditor $editor,
     array $xactions) {
 
-    if (!$editor->getIsNewObject()) {
+    if (!$editor->isFirstBroadcast()) {
       return;
     }
 

src/applications/differential/customfield/DifferentialTestPlanField.php

@@ -71,7 +71,7 @@ final class DifferentialTestPlanField
     PhabricatorApplicationTransactionEditor $editor,
     array $xactions) {
 
-    if (!$editor->getIsNewObject()) {
+    if (!$editor->isFirstBroadcast()) {
       return;
     }
 

src/applications/differential/editor/DifferentialTransactionEditor.php

@@ -26,6 +26,10 @@ final class DifferentialTransactionEditor
     return pht('%s created %s.', $author, $object);
   }
 
+  public function isFirstBroadcast() {
+    return $this->getIsNewObject();
+  }
+
   public function getDiffUpdateTransaction(array $xactions) {
     $type_update = DifferentialTransaction::TYPE_UPDATE;
 
@@ -600,24 +604,25 @@ final class DifferentialTransactionEditor
     return array_values(array_merge($head, $tail));
   }
 
-  protected function requireCapabilities(
-    PhabricatorLiskDAO $object,
-    PhabricatorApplicationTransaction $xaction) {
-
-    switch ($xaction->getTransactionType()) {}
-
-    return parent::requireCapabilities($object, $xaction);
-  }
-
   protected function shouldPublishFeedStory(
     PhabricatorLiskDAO $object,
     array $xactions) {
+
+    if (!$object->shouldBroadcast()) {
+      return false;
+    }
+
     return true;
   }
 
   protected function shouldSendMail(
     PhabricatorLiskDAO $object,
     array $xactions) {
+
+    if (!$object->shouldBroadcast()) {
+      return false;
+    }
+
     return true;
   }
 
@@ -633,14 +638,25 @@ final class DifferentialTransactionEditor
   protected function getMailAction(
     PhabricatorLiskDAO $object,
     array $xactions) {
-    $action = parent::getMailAction($object, $xactions);
 
-    $strongest = $this->getStrongestAction($object, $xactions);
+    $show_lines = false;
-    switch ($strongest->getTransactionType()) {
+    if ($this->isFirstBroadcast()) {
-      case DifferentialTransaction::TYPE_UPDATE:
+      $action = pht('Request');
-        $count = new PhutilNumber($object->getLineCount());
+
-        $action = pht('%s, %s line(s)', $action, $count);
+      $show_lines = true;
-        break;
+    } else {
+      $action = parent::getMailAction($object, $xactions);
+
+      $strongest = $this->getStrongestAction($object, $xactions);
+      $type_update = DifferentialTransaction::TYPE_UPDATE;
+      if ($strongest->getTransactionType() == $type_update) {
+        $show_lines = true;
+      }
+    }
+
+    if ($show_lines) {
+      $count = new PhutilNumber($object->getLineCount());
+      $action = pht('%s, %s line(s)', $action, $count);
     }
 
     return $action;
@@ -679,6 +695,16 @@ final class DifferentialTransactionEditor
     PhabricatorLiskDAO $object,
     array $xactions) {
 
+    $viewer = $this->requireActor();
+
+    // If this is the first time we're sending mail about this revision, we
+    // generate mail for all prior transactions, not just whatever is being
+    // applied now. This gets the "added reviewers" lines and other relevant
+    // information into the mail.
+    if ($this->isFirstBroadcast()) {
+      $xactions = $this->loadUnbroadcastTransactions($object);
+    }
+
     $body = new PhabricatorMetaMTAMailBody();
     $body->setViewer($this->requireActor());
 
@@ -1491,4 +1517,15 @@ final class DifferentialTransactionEditor
       $acting_phid);
   }
 
+  private function loadUnbroadcastTransactions($object) {
+    $viewer = $this->requireActor();
+
+    $xactions = id(new DifferentialTransactionQuery())
+      ->setViewer($viewer)
+      ->withObjectPHIDs(array($object->getPHID()))
+      ->execute();
+
+    return array_reverse($xactions);
+  }
+
 }

src/applications/differential/storage/DifferentialRevision.php

@@ -694,6 +694,14 @@ final class DifferentialRevision extends DifferentialDAO
     return $this;
   }
 
+  public function shouldBroadcast() {
+    if (!$this->isDraft()) {
+      return true;
+    }
+
+    return false;
+  }
+
 
 /* -(  HarbormasterBuildableInterface  )------------------------------------- */