Add validation

Author: takezoe

src/main/scala/app/GistController.scala

@@ -249,19 +249,15 @@ trait GistControllerBase extends ControllerBase {
     if(flatten){
       (0 to count - 1).flatMap { i =>
         (params.get(s"fileName-${i}"), params.get(s"content-${i}")) match {
-          case (Some(fileName), Some(content)) if(fileName.nonEmpty && content.nonEmpty) => Some((fileName, content))
+          case (Some(fileName), Some(content)) if(content.nonEmpty) => Some((if(fileName.isEmpty) s"gistfile${i + 1}.txt" else fileName, content))
           case _ => None
         }
       }
     } else {
       (0 to count - 1).map { i =>
         val fileName = request.getParameter(s"fileName-${i}")
         val content  = request.getParameter(s"content-${i}")
-        if(fileName.nonEmpty && content.nonEmpty){
-          (fileName, content)
-        } else {
-          ("", "")
-        }
+        (if(fileName.isEmpty) s"gistfile${i + 1}.txt" else fileName, content)
       }
     }
   }

src/main/twirl/gist/edit.scala.html

@@ -3,6 +3,7 @@
 @import view.helpers._
 @html.main("Snippet"){
   <div class="container">
+    <div id="error"></div>
     @if(gist.isEmpty){
       <div>
         <ul style="list-style: none; margin-left: 0px;">
@@ -101,15 +102,38 @@
 
     $('.submit_snippet').click(function(){
       var count = $('#count').val();
-      var editor = null;
+      if(count == 0){
+        displayError('File is required.');
+        return false;
+      }
+      var value = null;
       for(var i = 0; i < count; i++){
-        $('#content-' + i).val(ace.edit('editor-' + i).getValue());
+        value = ace.edit('editor-' + i).getValue();
+        if(value == ''){
+          displayError('Files can\'t be empty.');
+          return false;
+        } else {
+          $('#content-' + i).val(ace.edit('editor-' + i).getValue());
+        }
       }
+      return true;
     });
 
     $('#delete').click(function(){
       return confirm('Are you positive you want to delete this Gist?');
     });
+
+    function displayError(message){
+      $('#error' ).html(
+        '<div class="alert alert-error">' +
+        '<button type="button" class="close" data-dismiss="alert">&times;</button>' +
+        message +
+        '</div>'
+      );
+      $('html, body').animate({
+        scrollTop: $("#error").offset().top
+      }, 0);
+    }
   });
   </script>
 }