Fix Ajax processing.

src/main/scala/app/ControllerBase.scala

@@ -27,8 +27,50 @@ abstract class ControllerBase extends ScalatraFilter
     }
   }
 
-  protected def NotFound()     = html.error("Not Found")
-  protected def Unauthorized() = redirect("/")
+  def ajaxGet(path : String)(action : => Any) : Route = {
+    super.get(path){
+      request.setAttribute("AJAX", "true")
+      action
+    }
+  }
+
+  override def ajaxGet[T](path : String, form : MappingValueType[T])(action : T => Any) : Route = {
+    super.ajaxGet(path, form){ form =>
+      request.setAttribute("AJAX", "true")
+      action(form)
+    }
+  }
+
+  def ajaxPost(path : String)(action : => Any) : Route = {
+    super.post(path){
+      request.setAttribute("AJAX", "true")
+      action
+    }
+  }
+
+  override def ajaxPost[T](path : String, form : MappingValueType[T])(action : T => Any) : Route = {
+    super.ajaxPost(path, form){ form =>
+      request.setAttribute("AJAX", "true")
+      action(form)
+    }
+  }
+
+  protected def NotFound() = {
+    if(request.getAttribute("AJAX") == null){
+      org.scalatra.NotFound(html.error("Not Found"))
+    } else {
+      org.scalatra.NotFound()
+    }
+  }
+
+  // TODO redirect to the sign-in page if not logged in?
+  protected def Unauthorized() = {
+    if(request.getAttribute("AJAX") == null){
+      org.scalatra.Unauthorized(redirect("/"))
+    } else {
+      org.scalatra.Unauthorized()
+    }
+  }
 
   protected def baseUrl = {
     val url = request.getRequestURL.toString

src/main/scala/app/LabelsController.scala

@@ -32,7 +32,7 @@ trait LabelsControllerBase extends ControllerBase {
     redirect("/%s/%s/issues".format(owner, repository))
   })
 
-  get("/:owner/:repository/issues/label/edit")(writableRepository {
+  ajaxGet("/:owner/:repository/issues/label/edit")(writableRepository {
     val owner      = params("owner")
     val repository = params("repository")
 
@@ -40,7 +40,7 @@ trait LabelsControllerBase extends ControllerBase {
       .map(issues.html.labeleditlist(getLabels(owner, repository), _)) getOrElse NotFound()
   })
 
-  get("/:owner/:repository/issues/label/:labelId/edit")(writableRepository {
+  ajaxGet("/:owner/:repository/issues/label/:labelId/edit")(writableRepository {
     val owner      = params("owner")
     val repository = params("repository")
     val labelId    = params("labelId").toInt
@@ -50,7 +50,7 @@ trait LabelsControllerBase extends ControllerBase {
     } getOrElse NotFound()
   })
 
-  post("/:owner/:repository/issues/label/:labelId/edit", editForm)(writableRepository { form =>
+  ajaxPost("/:owner/:repository/issues/label/:labelId/edit", editForm)(writableRepository { form =>
     val owner      = params("owner")
     val repository = params("repository")
     val labelId    = params("labelId").toInt
@@ -61,7 +61,7 @@ trait LabelsControllerBase extends ControllerBase {
     } getOrElse NotFound()
   })
 
-  get("/:owner/:repository/issues/label/:labelId/delete")(writableRepository {
+  ajaxGet("/:owner/:repository/issues/label/:labelId/delete")(writableRepository {
     val owner      = params("owner")
     val repository = params("repository")
     val labelId    = params("labelId").toInt

src/main/twirl/issues/labeledit.scala.html

@@ -3,9 +3,8 @@
 @import view.helpers._
 @defining((if(label.isEmpty) ("new", 190, 4) else ("edit", 180, 8))){ case (mode, width, margin) =>
 <div id="@(mode)LabelArea">
-  <form method="POST" id="edit-label-form"
-        action="@url(repository)/issues/label/@{if(mode == "new") "new" else label.get.labelId + "/edit"}"
-        validate="true" @if(mode == "edit"){ style="margin-bottom: 8px;"}>
+  <form method="POST" id="edit-label-form" validate="true" style="margin-bottom: 8px;"
+        action="@url(repository)/issues/label/@{if(mode == "new") "new" else label.get.labelId + "/edit"}">
     <span id="error-@(mode)LabelName" class="error"></span>
     <input type="text" name="@(mode)LabelName" id="@(mode)LabelName" style="width: @(width)px; margin-left: @(margin)px; margin-bottom: 0px;" value="@label.map(_.labelName)"@if(mode == "new"){ placeholder="New label name"}/>
     <span id="error-@(mode)Color" class="error"></span>
@@ -26,21 +25,17 @@
       $('#editColor').colorpicker();
 
       $('#edit-label-form').submit(function(e){
-        var form = $(e.target);
-        $.post(form.attr('action') + '/validate', $(form).serialize(), function(data){
-          // clear all error messages
-          $('.error').text('');
-
-          if($.isEmptyObject(data)){
-            $.post(form.attr('action'), $(form).serialize(), function(data){
+        $.ajax($(this).attr('action'), {
+          type: 'POST',
+          data: $(this).serialize()
+        })
+        .done(function(data){
           $('#label-edit').parent().empty().html(data);
+        })
+        .fail(function(data, status){
+          displayErrors($.parseJSON(data.responseText));
         });
-          } else {
-            $.each(data, function(key, value){
-              $('#error-' + key).text(value);
-            });
-          }
-        }, 'json');
+
         return false;
       });
     }