Allow to limit route actions

This allows to limit route actions such as :index and :show in routes.rb
and only display these routes in views.

app/assets/javascripts/administrate/components/table.js

@@ -2,12 +2,14 @@ $(function() {
   var keycodes = { space: 32, enter: 13 };
 
   var visitDataUrl = function(event) {
-    if (event.type=="click" ||
+    if (event.type == "click" ||
         event.keyCode == keycodes.space ||
         event.keyCode == keycodes.enter) {
 
-      if(!event.target.href) {
-        window.location = $(event.target).closest("tr").data("url");
+      if (!event.target.href) {
+        var url = $(event.target).closest("tr").data("url");
+
+        if (url) window.location = url;
       }
     }
   };

app/controllers/administrate/application_controller.rb

@@ -79,6 +79,17 @@ def nav_link_state(resource)
       end
     end
 
+    helper_method :valid_action?
+    def valid_action?(name, resource = resource_name)
+      !!routes.detect do |controller, action|
+        controller == resource.to_s.pluralize && action == name.to_s
+      end
+    end
+
+    def routes
+      @routes ||= Namespace.new(namespace).routes
+    end
+
     def records_per_page
       params[:per_page] || 20
     end

app/views/administrate/application/_collection.html.erb

@@ -47,36 +47,41 @@ to display a collection of resources in an HTML table.
           <% end %>
         </th>
       <% end %>
-      <th colspan="2" scope="col"></th>
+      <% [valid_action?(:edit), valid_action?(:destroy)].count(true).times do %>
+        <th scope="col"></th>
+      <% end %>
     </tr>
   </thead>
 
   <tbody>
     <% resources.each do |resource| %>
       <tr class="table__row"
-          role="link"
           tabindex="0"
-          data-url="<%= polymorphic_path([namespace, resource]) -%>"
+          <%= %(role=link data-url=#{polymorphic_path([namespace, resource])}) if valid_action? :show -%>
           >
         <% collection_presenter.attributes_for(resource).each do |attribute| %>
           <td class="cell-data cell-data--<%= attribute.html_class %>">
             <%= render_field attribute %>
           </td>
         <% end %>
 
-        <td><%= link_to(
-          t("administrate.actions.edit"),
-          [:edit, namespace, resource],
-          class: "action-edit",
-        ) %></td>
+        <% if valid_action? :edit %>
+          <td><%= link_to(
+            t("administrate.actions.edit"),
+            [:edit, namespace, resource],
+            class: "action-edit",
+          ) %></td>
+        <% end %>
 
-        <td><%= link_to(
-          t("administrate.actions.destroy"),
-          [namespace, resource],
-          class: "table__action--destroy",
-          method: :delete,
-          data: { confirm: t("administrate.actions.confirm") }
-        ) %></td>
+        <% if valid_action? :destroy %>
+          <td><%= link_to(
+            t("administrate.actions.destroy"),
+            [namespace, resource],
+            class: "table__action--destroy",
+            method: :delete,
+            data: { confirm: t("administrate.actions.confirm") }
+          ) %></td>
+        <% end %>
       </tr>
     <% end %>
   </tbody>

app/views/administrate/application/edit.html.erb

@@ -24,7 +24,7 @@ It displays a header, and renders the `_form` partial to do the heavy lifting.
       "Show #{page.page_title}",
       [namespace, page.resource],
       class: "button",
-    ) %>
+    ) if valid_action? :show %>
   </div>
 </header>
 

app/views/administrate/application/index.html.erb

@@ -51,7 +51,7 @@ It renders the `_table` partial to display details about the resources.
       "New #{page.resource_name.titleize.downcase}",
       [:new, namespace, page.resource_name],
       class: "button",
-    ) %>
+    ) if valid_action? :new %>
   </div>
 </header>
 

app/views/administrate/application/show.html.erb

@@ -25,7 +25,7 @@ as well as a link to its edit page.
       "Edit",
       [:edit, namespace, page.resource],
       class: "button",
-    ) %>
+    ) if valid_action? :edit %>
   </div>
 </header>
 

app/views/fields/belongs_to/_index.html.erb

@@ -16,8 +16,12 @@ By default, the relationship is rendered as a link to the associated object.
 %>
 
 <% if field.data %>
-  <%= link_to(
-    field.display_associated_resource,
-    [namespace, field.data],
-  ) %>
+  <% if valid_action?(:show, field.attribute) %>
+    <%= link_to(
+      field.display_associated_resource,
+      [namespace, field.data],
+    ) %>
+  <% else %>
+    <%= field.display_associated_resource %>
+  <% end %>
 <% end %>

app/views/fields/belongs_to/_show.html.erb

@@ -16,8 +16,12 @@ By default, the relationship is rendered as a link to the associated object.
 %>
 
 <% if field.data %>
-  <%= link_to(
-    field.display_associated_resource,
-    [namespace, field.data],
-  ) %>
+  <% if valid_action?(:show, field.attribute) %>
+    <%= link_to(
+      field.display_associated_resource,
+      [namespace, field.data],
+    ) %>
+  <% else %>
+    <%= field.display_associated_resource %>
+  <% end %>
 <% end %>

lib/administrate/namespace.rb

@@ -5,24 +5,24 @@ def initialize(namespace)
     end
 
     def resources
-      namespace_controller_paths.uniq.map do |controller|
-        controller.gsub(/^#{namespace}\//, "").to_sym
+      @resources ||= routes.map(&:first).uniq.map(&:to_sym)
+    end
+
+    def routes
+      @routes ||= all_routes.select do |controller, _action|
+        controller.starts_with?(namespace.to_s)
+      end.map do |controller, action|
+        [controller.gsub(/^#{namespace}\//, ""), action]
       end
     end
 
     private
 
     attr_reader :namespace
 
-    def namespace_controller_paths
-      all_controller_paths.select do |controller|
-        controller.starts_with?(namespace.to_s)
-      end
-    end
-
-    def all_controller_paths
+    def all_routes
       Rails.application.routes.routes.map do |route|
-        route.defaults[:controller].to_s
+        route.defaults.values_at(:controller, :action).map(&:to_s)
       end
     end
   end