(refs #102)Add validation and auto completion to the transfer user name field

src/main/scala/app/RepositorySettingsController.scala

@@ -48,7 +48,7 @@ trait RepositorySettingsControllerBase extends ControllerBase with FlashMapSuppo
   case class TransferOwnerShipForm(newOwner: String)
 
   val transferForm = mapping(
-    "newOwner" -> trim(label("New owner", text(required))) // TODO user and repository existence check
+    "newOwner" -> trim(label("New owner", text(required, transferUser)))
   )(TransferOwnerShipForm.apply)
 
   /**
@@ -256,4 +256,20 @@ trait RepositorySettingsControllerBase extends ControllerBase with FlashMapSuppo
       }
   }
 
+  /**
+   * Provides Constraint to validate the repository transfer user.
+   */
+  private def transferUser: Constraint = new Constraint(){
+    override def validate(name: String, value: String, messages: Messages): Option[String] =
+      getAccountByUserName(value) match {
+        case None    => Some("User does not exist.")
+        case Some(x) => if(x.userName == params("owner")){
+          Some("This is current repository owner.")
+        } else {
+          params.get("repository").flatMap { repositoryName =>
+            getRepositoryNamesOfUser(x.userName).find(_ == repositoryName).map{ _ => "User already has same repository." }
+          }
+        }
+      }
+  }
 }

src/main/twirl/settings/transfer.scala.html

@@ -1,24 +1,19 @@
 @(repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context)
 @import context._
 @import view.helpers._
-@html.main("Delete Repository", Some(repository)){
+@html.main("Transfer Ownership", Some(repository)){
   @html.header("settings", repository)
   @menu("transfer", repository){
-    <form id="form" method="post" action="@url(repository)/settings/transfer">
+    <form id="form" method="post" action="@url(repository)/settings/transfer" validate="true" autocomplete="off">
       <h3>Transfer Ownership</h3>
       <fieldset>
         <label for="newOwner" class="strong">New owner:</label>
-        <input type="text" name="newOwner" id="newOwner"/>
-        <span id="error-newOwner" class="error"></span>
-      </fieldset>
+        @helper.html.account("newOwner", 300)
         <input type="submit" class="btn btn-danger" value="Transfer"/>
+        <div>
+          <span id="error-newOwner" class="error"></span>
+        </div>
+      </fieldset>
     </form>
   }
 }
-<script>
-$(function(){
-  $('#form').submit(function(){
-    return confirm('Do you really want to transfer this repo?');
-  });
-});
-</script>