robustify Differential and Maniphest mailhandlers wrt attachments

Summary:
a few things

- make the parent mailhandler class not send "blank body" error if you have attachments
- make both differential and maniphest append a list of attachments to the body if any exist
- BONUS - made the cc stuff work in Maniphest

Test Plan: I haven't actually tested this yet. :(  i need to figure out how to send a mail with an attachment from the command-line and figured I'd serve this up first.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2012

Differential Revision: https://secure.phabricator.com/D3868

src/applications/differential/DifferentialReplyHandler.php

@@ -107,10 +107,10 @@ class DifferentialReplyHandler extends PhabricatorMailReplyHandler {
 
   protected function receiveEmail(PhabricatorMetaMTAReceivedMail $mail) {
     $this->receivedMail = $mail;
-    $this->handleAction($mail->getCleanTextBody());
+    $this->handleAction($mail->getCleanTextBody(), $mail->getAttachments());
   }
 
-  public function handleAction($body) {
+  public function handleAction($body, array $attachments) {
     // all commands start with a bang and separated from the body by a newline
     // to make sure that actual feedback text couldn't trigger an action.
     // unrecognized commands will be parsed as part of the comment.
@@ -135,6 +135,8 @@ class DifferentialReplyHandler extends PhabricatorMailReplyHandler {
         return null;
     }
 
+    $body = $this->enhanceBodyWithAttachments($body, $attachments);
+
     try {
       $editor = new DifferentialCommentEditor(
         $this->getMailReceiver(),

src/applications/maniphest/ManiphestReplyHandler.php

@@ -63,9 +63,9 @@ final class ManiphestReplyHandler extends PhabricatorMailReplyHandler {
 
     $body = $mail->getCleanTextBody();
     $body = trim($body);
+    $body = $this->enhanceBodyWithAttachments($body, $mail->getAttachments());
 
     $xactions = array();
-
     $content_source = PhabricatorContentSource::newForSource(
       PhabricatorContentSource::SOURCE_EMAIL,
       array(
@@ -76,6 +76,7 @@ final class ManiphestReplyHandler extends PhabricatorMailReplyHandler {
     $template->setContentSource($content_source);
     $template->setAuthorPHID($user->getPHID());
 
+
     if ($is_new_task) {
       // If this is a new task, create a "User created this task." transaction
       // and then set the title and description.
@@ -134,21 +135,14 @@ final class ManiphestReplyHandler extends PhabricatorMailReplyHandler {
       $xactions[] = $xaction;
     }
 
-    // TODO: We should look at CCs on the mail and add them as CCs.
-
-    $files = $mail->getAttachments();
-    if ($files) {
-      $file_xaction = clone $template;
-      $file_xaction->setTransactionType(ManiphestTransactionType::TYPE_ATTACH);
-
-      $phid_type = PhabricatorPHIDConstants::PHID_TYPE_FILE;
-      $new = $task->getAttached();
-      foreach ($files as $file_phid) {
-        $new[$phid_type][$file_phid] = array();
-      }
-
-      $file_xaction->setNewValue($new);
-      $xactions[] = $file_xaction;
+    $ccs = $mail->loadCCPHIDs();
+    if ($ccs) {
+      $old_ccs = $task->getCCPHIDs();
+      $new_ccs = array_unique(array_merge($old_ccs, $ccs));
+      $cc_xaction = clone $template;
+      $cc_xaction->setTransactionType(ManiphestTransactionType::TYPE_CCS);
+      $cc_xaction->setNewValue($new_ccs);
+      $xactions[] = $cc_xaction;
     }
 
     $event = new PhabricatorEvent(

src/applications/metamta/replyhandler/PhabricatorMailReplyHandler.php

@@ -73,7 +73,9 @@ abstract class PhabricatorMailReplyHandler {
 
   private function sanityCheckEmail(PhabricatorMetaMTAReceivedMail $mail) {
     $body        = $mail->getCleanTextBody();
-    if (empty($body)) {
+    $attachments = $mail->getAttachments();
+
+    if (empty($body) && empty($attachments)) {
       return 'Empty email body. Email should begin with an !action and / or '.
              'text to comment. Inline replies and signatures are ignored.';
     }
@@ -305,4 +307,26 @@ EOBODY;
     return $this->getSingleReplyHandlerPrefix($address);
   }
 
+  final protected function enhanceBodyWithAttachments($body,
+                                                      array $attachments) {
+    if (!$attachments) {
+      return $body;
+    }
+
+    $files = id(new PhabricatorFile())
+      ->loadAllWhere('phid in (%Ls)', $attachments);
+
+    // if we have some text then double return before adding our file list
+    if ($body) {
+      $body .= "\n\n";
+    }
+
+    foreach ($files as $file) {
+      $file_str = sprintf('- {F%d, layout=link}', $file->getID());
+      $body .= $file_str."\n";
+    }
+
+    return rtrim($body);
+  }
+
 }

src/applications/metamta/storage/PhabricatorMetaMTAReceivedMail.php

@@ -68,6 +68,14 @@ final class PhabricatorMetaMTAReceivedMail extends PhabricatorMetaMTADAO {
       $this->getCCAddresses()
     );
 
+    return $this->loadPHIDsFromAddresses($addresses);
+  }
+
+  final public function loadCCPHIDs() {
+    return $this->loadPHIDsFromAddresses($this->getCCAddresses());
+  }
+
+  private function loadPHIDsFromAddresses(array $addresses) {
     $users = id(new PhabricatorUserEmail())
       ->loadAllWhere('address IN (%Ls)', $addresses);
     $user_phids = mpull($users, 'getUserPHID');