Allow Auth messages to have detailed descriptions and default values, then give "Email Login" both

Summary:
Depends on D20664. Ref T13343. There's a reasonable value for the default "Email Login" auth message (generic "you reset your password" text) that installs may reasonably want to replace. Add support for a default value.

Also, since it isn't completely obvious where this message shows up, add support for an extended description and explain what's going on in more detail.

Test Plan:
  - Viewed message detail page, saw more detailed information.
  - Sent mail (got default), overrode message and sent mail (got custom message), deleted message (got default again).

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13343

Differential Revision: https://secure.phabricator.com/D20665

src/applications/auth/controller/message/PhabricatorAuthMessageViewController.php

@@ -97,20 +97,35 @@ final class PhabricatorAuthMessageViewController
   private function buildPropertiesView(PhabricatorAuthMessage $message) {
     $viewer = $this->getViewer();
 
+    $message_type = $message->getMessageType();
+
     $view = id(new PHUIPropertyListView())
       ->setViewer($viewer);
 
-    $view->addProperty(
-      pht('Description'),
-      $message->getMessageType()->getShortDescription());
+    $full_description = $message_type->getFullDescription();
+    if (strlen($full_description)) {
+      $view->addTextContent(new PHUIRemarkupView($viewer, $full_description));
+    } else {
+      $short_description = $message_type->getShortDescription();
+      $view->addProperty(pht('Description'), $short_description);
+    }
 
-    if (strlen($message->getMessageText())) {
+    $message_text = $message->getMessageText();
+    if (strlen($message_text)) {
       $view->addSectionHeader(
         pht('Message Preview'),
         PHUIPropertyListView::ICON_SUMMARY);
 
-      $view->addTextContent(
-        new PHUIRemarkupView($viewer, $message->getMessageText()));
+      $view->addTextContent(new PHUIRemarkupView($viewer, $message_text));
+    }
+
+    $default_text = $message_type->getDefaultMessageText();
+    if (strlen($default_text)) {
+      $view->addSectionHeader(
+        pht('Default Message'),
+        PHUIPropertyListView::ICON_SUMMARY);
+
+      $view->addTextContent(new PHUIRemarkupView($viewer, $default_text));
     }
 
     return $view;

src/applications/auth/message/PhabricatorAuthEmailLoginMessageType.php

@@ -15,4 +15,27 @@ final class PhabricatorAuthEmailLoginMessageType
       'to access their account.');
   }
 
+  public function getFullDescription() {
+    return pht(
+      'Guidance included in the mail message body when users request an '.
+      'email link to access their account.'.
+      "\n\n".
+      'For installs with password authentication enabled, users access this '.
+      'workflow by using the "Forgot your password?" link on the login '.
+      'screen.'.
+      "\n\n".
+      'For installs without password authentication enabled, users access '.
+      'this workflow by using the "Send a login link to your email address." '.
+      'link on the login screen. This workflow allows users to recover '.
+      'access to their account if there is an issue with an external '.
+      'login service.');
+  }
+
+  public function getDefaultMessageText() {
+    return pht(
+      'You (or someone pretending to be you) recently requested an account '.
+      'recovery link be sent to this email address. If you did not make '.
+      'this request, you can ignore this message.');
+  }
+
 }

src/applications/auth/message/PhabricatorAuthMessageType.php

@@ -30,4 +30,12 @@ abstract class PhabricatorAuthMessageType
   abstract public function getDisplayName();
   abstract public function getShortDescription();
 
+  public function getFullDescription() {
+    return null;
+  }
+
+  public function getDefaultMessageText() {
+    return null;
+  }
+
 }

src/applications/auth/storage/PhabricatorAuthMessage.php

@@ -75,12 +75,16 @@ final class PhabricatorAuthMessage
     $message_key) {
 
     $message = self::loadMessage($viewer, $message_key);
-
-    if (!$message) {
-      return null;
+    if ($message) {
+      $message_text = $message->getMessageText();
+      if (strlen($message_text)) {
+        return $message_text;
+      }
     }
 
-    return $message->getMessageText();
+    $message_type = PhabricatorAuthMessageType::newFromKey($message_key);
+
+    return $message_type->getDefaultMessageText();
   }
 
 

src/applications/people/mail/PhabricatorPeopleMailEngine.php

@@ -90,7 +90,10 @@ abstract class PhabricatorPeopleMailEngine
       ->setConfig('uri.base', PhabricatorEnv::getProductionURI('/'))
       ->setMode(PhutilRemarkupEngine::MODE_TEXT);
 
-    return $engine->markupText($text);
+    $rendered_text = $engine->markupText($text);
+    $rendered_text = rtrim($rendered_text, "\n");
+
+    return $rendered_text;
   }
 
 }