Adding delete button for exams

app/controllers/exams_controller.rb

@@ -142,6 +142,39 @@ def index
     end
   end
 
+  def destroy
+    exam_dir = 'public/examfiles/'
+    @exam = Exam.find(params[:id])
+    exam_path = exam_dir+ @exam.filename
+    File.delete(exam_path)
+    @exam.destroy
+    redirect_to :back
+
+  end
+
+  def update_form
+    @exam = Exam.find_by_id(params[:id])
+  end
+
+  def update
+    exam_dir = 'public/examfiles/'
+    @exam = Exam.find_by_id(params[:id])
+    exam_path = exam_dir+ @exam.filename
+    exam_file = params[:file_info]
+
+    begin
+      f = File.open(exam_path, 'wb')
+      if @exam.valid? and not f.nil?
+        f.write(exam_file.read)
+        @exam.save
+        flash[:notice] = "Exam Reuploaded!"
+        redirect_to :back
+      end
+    ensure
+      f.close if f
+    end
+  end
+
   def department
     @dept_name, @courses = Exam.get_dept_name_courses_tuples(params[:dept_abbr])
 

app/views/admin/studrel/index.html.erb

@@ -1,3 +1,10 @@
 <h1>Studrel Admin</h1>
 <h3>Add a new exam file</h3>
 <%= button_to "New Exam File", exams_new_path, :method => :get %>
+<h3>Delete or Update an exam file</h3>
+  <div id="examfiles" class="searchcontrol">
+    <%= form_tag(exams_search_path, :method => :get) do %>
+      <%= text_field_tag :q, params[:controller].eql?('exams') ? h(params[:q]) : '', :placeholder=>"Search Exams", :class=>"text autoclear", :id => "examfiles_q" %>
+      <%= submit_tag "Search", :name=>nil %>
+    <%- end -%>
+  </div>

app/views/exams/course.html.erb

@@ -20,9 +20,15 @@
       </td>
       <%- ['mt1', 'mt2', 'mt3', 'f'].each do |short_type| -%>
 	<td>
-	<%- exam = exams[short_type] -%>
-	<%- sol = solutions[short_type] -%>
+	<%- exam = exams[short_type] -%> 
+	<%- sol = solutions[short_type] -%> 
 	<%= (link_to "[#{exam.file_type}]", @exam_path+exam.filename) unless exam.nil?%><%= (link_to '[solution]', @exam_path+sol.filename) unless sol.nil? %>
+	<% if @auth["studrel"] %>
+	<%= (link_to '[Remove exam]', exams_destroy_path(exam.id) , :method => :delete, :confirm => 'Are you sure?') unless exam.nil?%>
+	<%= (link_to '[Update exam]', exams_update_form_path(exam.id), :method => :get) unless exam.nil?%>
+	<%= (link_to '[Remove solution]' , exams_destroy_path(sol.id) , :method => :delete, :confirm => 'Are you sure?') unless sol.nil?%>
+	<%= (link_to '[Update solution]' , exams_update_form_path(sol.id) , :method => :get) unless sol.nil?%>
+	<% end %>
       </td>
       <%- end -%>
     </tr>

app/views/exams/update_form.html.erb

@@ -0,0 +1,41 @@
+<% content_for :header do %>
+  <%= javascript_include_tag "jquery-autocomplete.min" %>
+  <%= stylesheet_link_tag "jquery-autocomplete" %>
+
+  <script type="text/javascript">
+    $(document).ready(function() {
+        $.ajax({
+          url: '/admin/tutor/find_courses',
+          success: function(data) {
+            d = []
+            for(var item in data) {
+              d[item] = {text: data[item]["text"], url: data[item]["url"]}
+            }
+
+            $("#course_query").autocomplete(data, {
+              formatItem: function(item) {
+                return item.text;
+              }
+            }).result(function(event, item) {
+              $("#course_id").attr("value", item.url);
+            });
+          }
+        });
+      });
+  </script>
+
+
+<% end %>
+
+<%= form_for @exam, :url => :exams_update , :html => { :multipart => true , :method => :post } do |f| %>
+
+  <div>
+
+    <div id="upload">
+      <%= file_field_tag :file_info %>
+    </div>
+
+    <%= f.submit "Update Exam File" %>
+
+  </div>
+<% end %>

config/routes.rb

@@ -338,6 +338,12 @@
       :as => :exams_new
     post 'create'                                 => "exams#create",
       :as => :exams_create
+    delete ':id/destroy' => "exams#destroy",
+      :as => :exams_destroy
+    get ':id/update_form' => "exams#update_form",
+      :as => :exams_update_form
+    post ':id/update' => "exams#update",
+      :as => :exams_update
   end
   #resources :exams