WebEditor: sceleton

app/controllers/tree_controller.rb

@@ -26,5 +26,13 @@ class TreeController < ProjectResourceController
 
   def update
     last_commit = @project.commits(@ref, @path, 1).first.sha
+    file_editor = Gitlab::FileEditor.new(current_user, @project)
+    if file_editor.can_edit?(@path, last_commit)
+      file_editor.update(@path, params[:content])
+      redirect_to project_tree_path(@project, @id), :notice => "File has been successfully changed"
+    else
+      flash[:notice] = "You can't save file because it has been changed"
+      render :edit 
+    end
   end
 end

app/views/tree/edit.html.haml

@@ -8,9 +8,9 @@
         #editor= @tree.data
 
     .editor-commit-comment
-      = label_tag 'text-commit' do
+      = label_tag 'commit_message' do
         %p.slead Commit message
-      = text_area_tag 'text_commit'
+      = text_area_tag 'commit_message'
     .form-actions
       = hidden_field_tag 'last_commit', @last_commit
       = hidden_field_tag 'content'

lib/gitlab/file_editor.rb

+module Gitlab
+  class FileEditor
+
+    attr_accessor :user, :project
+
+    def initialize(user, project)
+      self.user = user
+      self.project = project
+    end
+
+    def can_edit?(path, last_commit)
+      true
+    end
+
+    def update(path, content)
+      true
+    end
+
+  end
+end