Add if option to conditionally hide a collection action

Closes #41

Author: guewen

README.md

@@ -149,6 +149,12 @@ config.scoped_collection_actions_if = -> { params[:scope] }
 # etc.
 ```
 
+You can also manage visibility of each action individually:
+
+```ruby
+scoped_collection_action :scoped_collection_destroy, if: proc { can? :destroy, Blog }
+```
+
 ### Can I use my handler on update/delete action?
 
 You can pass block to default actions update and delete.

lib/active_admin_scoped_collection_actions/resource_extension.rb

@@ -1,5 +1,6 @@
 module ActiveAdminScopedCollectionActions
   module ResourceExtension
+    include MethodOrProcHelper
 
     def initialize(*)
       super
@@ -54,6 +55,8 @@ def scoped_collection_actions_sidebar_section
         div I18n.t('active_admin_scoped_collection_actions.sidebar_msg')
 
         active_admin_config.scoped_collection_actions.each do |key, options={}|
+          next if options.key?(:if) && !call_method_or_exec_proc(options[:if])
+
           b_title = options.fetch(:title, ::ActiveSupport::Inflector.humanize(key))
           b_options = {}
           b_options[:class] = options[:class] if options[:class].present?

spec/authors_actions_spec.rb

@@ -24,6 +24,10 @@
           .to have_css('button', text: 'Update')
       expect(page.find('#collection_actions_sidebar_section'))
           .to have_css('button', text: 'Delete')
+      expect(page.find('#collection_actions_sidebar_section'))
+          .to have_css('button', text: 'Visible Action')
+      expect(page.find('#collection_actions_sidebar_section'))
+          .not_to have_css('button', text: 'Hidden Action')
     end
 
   end
@@ -77,7 +81,6 @@
     end
   end
 
-
   context 'perform Delete-action when cheked only one item' do
     let(:delete_author) { Author.first }
 

spec/support/admin.rb

@@ -14,6 +14,15 @@ def add_author_resource(options = {}, &block)
     scoped_collection_action :scoped_collection_destroy,
                              title: 'Delete',
                              confirm: 'Delete all?'
+    scoped_collection_action :scoped_collection_custom_visible,
+                             if: proc { true },
+                             title: 'Visible Action' do
+                               flash[:notice] = 'Visible action executed'
+                             end
+    scoped_collection_action :scoped_collection_custom_hidden,
+                             if: proc { false },
+                             title: 'Hidden Action'
+                             
   end
 
   Rails.application.reload_routes!