Add "View Email" action to application transactions

Summary: Should help with debugging. In the web UI there is now a link to "View Email". This uses the same debugging output that `./bin/mail show-outbound` uses. Fixes T5768. Code is very defensive as I think these tables may be truncated eventually?

Test Plan: viewed some emails and it worked!

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5768

Differential Revision: https://secure.phabricator.com/D10244

src/applications/transactions/controller/PhabricatorApplicationTransactionCommentRawController.php

@@ -38,10 +38,36 @@ final class PhabricatorApplicationTransactionCommentRawController
       ->withPHIDs(array($obj_phid))
       ->executeOne();
 
+    $title = pht('Raw Comment');
+    $body = $xaction->getComment()->getContent();
+    $addendum = null;
+    if ($request->getExists('email')) {
+      $content_source = $xaction->getContentSource();
+      $source_email = PhabricatorContentSource::SOURCE_EMAIL;
+      if ($content_source->getSource() == $source_email) {
+        $source_id = $content_source->getParam('id');
+        if ($source_id) {
+          $message = id(new PhabricatorMetaMTAReceivedMail())->loadOneWhere(
+            'id = %d',
+            $source_id);
+          if ($message) {
+            $title = pht('Email Body Text');
+            $body = $message->getRawTextBody();
+            $details_text = pht(
+              'For full details, run `/bin/mail show-outbound --id %d`',
+              $source_id);
+            $addendum = PhabricatorMarkupEngine::renderOneObject(
+              id(new PhabricatorMarkupOneOff())->setContent($details_text),
+              'default',
+              $user);
+          }
+        }
+      }
+    }
     $dialog = id(new AphrontDialogView())
       ->setUser($user)
       ->addCancelButton($obj_handle->getURI())
-      ->setTitle(pht('Raw Comment'));
+      ->setTitle($title);
 
     $dialog
       ->addHiddenInput('anchor', $request->getStr('anchor'))
@@ -51,7 +77,10 @@ final class PhabricatorApplicationTransactionCommentRawController
         ->appendChild(
           id(new AphrontFormTextAreaControl())
           ->setReadOnly(true)
-          ->setValue($xaction->getComment()->getContent())));
+          ->setValue($body)));
+    if ($addendum) {
+      $dialog->appendParagraph($addendum);
+    }
 
     return id(new AphrontDialogResponse())->setDialog($dialog);
   }

src/view/phui/PHUITimelineEventView.php

@@ -539,6 +539,23 @@ final class PHUITimelineEventView extends AphrontView {
           array(
             'anchor' => $anchor,
           ));
+
+      $content_source = $this->getContentSource();
+      $source_email = PhabricatorContentSource::SOURCE_EMAIL;
+      if ($content_source->getSource() == $source_email) {
+        $source_id = $content_source->getParam('id');
+        if ($source_id) {
+          $items[] = id(new PhabricatorActionView())
+            ->setIcon('fa-envelope-o')
+            ->setHref('/transactions/raw/'.$xaction_phid.'/?email')
+            ->setName(pht('View Email Body'))
+            ->addSigil('transaction-raw')
+            ->setMetadata(
+              array(
+                'anchor' => $anchor,
+              ));
+        }
+      }
     }
 
     if ($this->getIsRemovable()) {