Swap Repository Edit UI to new code

Summary:
Ref T10748. This needs more extensive testing and is sure to have some rough edges, but seems to basically work so far.

Throwing this up so I can work through it more deliberately and make notes.

Test Plan:
- Ran migration.
- Used `bin/repository list` to list existing repositories.
- Used `bin/repository update <repository>` to update various repositories.
- Updated a migrated, hosted Git repository.
- Updated a migrated, observed Git repository.
- Converted an observed repository into a hosted repository by toggling the I/O mode of the URI.
- Conveted a hosted repository into an observed repository by toggling it back.
- Created and activated a new empty hosted Git repository.
- Created and activated an observed Git repository.
- Updated a mirrored repository.
- Cloned and pushed over HTTP.
- Tried to HTTP push a read-only repository.
- Cloned and pushed over SSH.
- Tried to SSH push a read-only repository.
- Updated several Mercurial repositories.
- Updated several Subversion repositories.
- Created and edited repositories via the API.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10748

Differential Revision: https://secure.phabricator.com/D15842

src/applications/diffusion/editor/DiffusionURIEditor.php

@@ -410,4 +410,44 @@ final class DiffusionURIEditor
     return $errors;
   }
 
+  protected function applyFinalEffects(
+    PhabricatorLiskDAO $object,
+    array $xactions) {
+
+    // Synchronize the repository state based on the presence of an "Observe"
+    // URI.
+    $repository = $object->getRepository();
+
+    $uris = id(new PhabricatorRepositoryURIQuery())
+      ->setViewer(PhabricatorUser::getOmnipotentUser())
+      ->withRepositories(array($repository))
+      ->execute();
+
+    $observe_uri = null;
+    foreach ($uris as $uri) {
+      if ($uri->getIoType() != PhabricatorRepositoryURI::IO_OBSERVE) {
+        continue;
+      }
+
+      $observe_uri = $uri;
+      break;
+    }
+
+    if ($observe_uri) {
+      $repository
+        ->setHosted(false)
+        ->setDetail('remote-uri', (string)$observe_uri->getEffectiveURI())
+        ->setCredentialPHID($observe_uri->getCredentialPHID());
+    } else {
+      $repository
+        ->setHosted(true)
+        ->setDetail('remote-uri', null)
+        ->setCredentialPHID(null);
+    }
+
+    $repository->save();
+
+    return $xactions;
+  }
+
 }