Trivially implement RepositoryEditEngine and API methods

Summary: Ref T10748. Ref T10337. This technically implements this stuff, but it does not do anything useful yet. This skips all the hard stuff.

Test Plan:
  - Technically used `diffusion.repository.search` to get repository information.
  - Technically used `diffusion.repository.edit` to change a repository name.
  - Used `editpro/` to edit a repository name.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10337, T10748

Differential Revision: https://secure.phabricator.com/D15736

src/applications/diffusion/editor/DiffusionRepositoryEditEngine.php

@@ -0,0 +1,84 @@
+<?php
+
+final class DiffusionRepositoryEditEngine
+  extends PhabricatorEditEngine {
+
+  const ENGINECONST = 'diffusion.repository';
+
+  public function isEngineConfigurable() {
+    return false;
+  }
+
+  public function getEngineName() {
+    return pht('Repositories');
+  }
+
+  public function getSummaryHeader() {
+    return pht('Edit Repositories');
+  }
+
+  public function getSummaryText() {
+    return pht('Creates and edits repositories.');
+  }
+
+  public function getEngineApplicationClass() {
+    return 'PhabricatorDiffusionApplication';
+  }
+
+  protected function newEditableObject() {
+    $viewer = $this->getViewer();
+    return PhabricatorRepository::initializeNewRepository($viewer);
+  }
+
+  protected function newObjectQuery() {
+    return new PhabricatorRepositoryQuery();
+  }
+
+  protected function getObjectCreateTitleText($object) {
+    return pht('Create Repository');
+  }
+
+  protected function getObjectCreateButtonText($object) {
+    return pht('Create Repository');
+  }
+
+  protected function getObjectEditTitleText($object) {
+    return pht('Edit Repository: %s', $object->getName());
+  }
+
+  protected function getObjectEditShortText($object) {
+    return $object->getDisplayName();
+  }
+
+  protected function getObjectCreateShortText() {
+    return pht('Create Repository');
+  }
+
+  protected function getObjectName() {
+    return pht('Repository');
+  }
+
+  protected function getObjectViewURI($object) {
+    return $object->getPathURI('manage/');
+  }
+
+  protected function getCreateNewObjectPolicy() {
+    return $this->getApplication()->getPolicy(
+      DiffusionCreateRepositoriesCapability::CAPABILITY);
+  }
+
+  protected function buildCustomEditFields($object) {
+    return array(
+      id(new PhabricatorTextEditField())
+        ->setKey('name')
+        ->setLabel(pht('Name'))
+        ->setIsRequired(true)
+        ->setTransactionType(PhabricatorRepositoryTransaction::TYPE_NAME)
+        ->setDescription(pht('The repository name.'))
+        ->setConduitDescription(pht('Rename the repository.'))
+        ->setConduitTypeDescription(pht('New repository name.'))
+        ->setValue($object->getName()),
+    );
+  }
+
+}