Option delete items added to check_availability page

back-office/app/views/items/check_availability.html.erb

@@ -2,33 +2,48 @@
   <p><label for="supplier_id">Supplier: </label>
   <%= select_tag "supplier_id", options_from_collection_for_select(@suppliers, "id", "name", @selected_supplier.try(:id)) %></p>
 
-  <p><label for="codes"> 
+  <p><label for="codes">
     Codes to check:
   </label><br />
   <%= text_area_tag "codes", @codes_to_check, rows: 20, columns: 50 %></p>
 
   <p><%= submit_tag "Check" %></p>
+  <p><%= submit_tag "Delete Items" %></p>
 <% end %>
 
-<div>
-<h2> In database: <%= @items.length %>, in file: <%= @codes_to_check_array.length %> </h2>
-</div>
+<% if controller.action_name == 'delete_items' %>
+
+ <h2> Delete successful </h2>
+
+ <% if @not_deleted_items.length > 0 %>
+   <p>Not deleted items</p>
+   <% @not_deleted_items.each do |code| %>
+     <%= code %><br />
+   <% end %>
+ <% end %>
+
+<% else %>
+
+  <div>
+    <h2> In database: <%= @items.length %>, in file: <%= @codes_to_check_array.length %> </h2>
+  </div>
+
+  <div>
+    <h2>Not in database (<%= @missing_from_database.length %>): </h2>
+    <br />
+    <% @missing_from_database.each do |code| %>
+      <%= code %><br />
+    <% end %>
+
+  </div>
+
+  <div>
+    <h2>Not in file (<%= @missing_from_codes.length %>): </h2>
+    <br />
+    <% @missing_from_codes.each do |code| %>
+      <%= code %><br />
+    <% end %>
+
+  </div>
 
-<div>
-<h2>Not in database (<%= @missing_from_database.length %>): </h2>
-<br />
-<% @missing_from_database.each do |code| %>
-  <%= code %><br /> 
 <% end %>
-
-</div>
-
-<div>
-<h2>Not in file (<%= @missing_from_codes.length %>): </h2>
-<br />
-<% @missing_from_codes.each do |code| %>
-  <%= code %><br />
-<% end %>
-
-</div>
-