Making it possible for users to easily register existing MACs

app/views/macs/_form.html.erb

@@ -17,7 +17,8 @@
   </div>
   <div class="field">
     <%= f.label :mac %><br />
-    <%= f.text_field :mac %>
+    <%= f.text_field :mac, :value => (@mac.mac || @arp || nil) %>
+    <% if @arp.present? %><br/><em>Autodetected from your IP of <%= @ip %></em><% end %>
   </div>
   <div class="field">
     <%= f.label :note %><br />

app/views/users/show.html.erb

@@ -93,6 +93,14 @@
   <% end %>
 </p>
 
+<b>Computers: </b><%= link_to "+ Add", new_mac_path, :class => 'btn' if can? :create, Mac %>
+<ul>
+  <% @user.macs.each do |mac| %>
+    <li><%= link_to mac.mac, mac %></li>
+  <% end %>
+  <% if @user.macs.blank? %><li>n/a</li><% end %>
+</ul>
+
 <p>
   <% if current_user.admin? then %>
     <b>Payments:</b>