Merge branch 'issue_8110' into 'master'

Allow slack service to send messages on different channels

closes #8110 

## Allow slack service to send messages on different channels  

![new_slack_service](/uploads/87de0bd6b02a4f7853358676b5e74dff/new_slack_service.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5124

3 files changed, 40 insertions, 37 deletions

diff --git a/app/controllers/admin/services_controller.rb b/app/controllers/admin/services_controller.rb
index 46133588332..7c37f3155da 100644
--- a/app/controllers/admin/services_controller.rb
+++ b/app/controllers/admin/services_controller.rb
@@ -1,4 +1,6 @@
 class Admin::ServicesController < Admin::ApplicationController
+  include ServiceParams
+
   before_action :service, only: [:edit, :update]
 
   def index
@@ -13,7 +15,7 @@ class Admin::ServicesController < Admin::ApplicationController
   end
 
   def update
-    if service.update_attributes(application_services_params[:service])
+    if service.update_attributes(service_params[:service])
       redirect_to admin_application_settings_services_path,
         notice: 'Application settings saved successfully'
     else
@@ -37,15 +39,4 @@ class Admin::ServicesController < Admin::ApplicationController
   def service
     @service ||= Service.where(id: params[:id], template: true).first
   end
-
-  def application_services_params
-    application_services_params = params.permit(:id,
-      service: Projects::ServicesController::ALLOWED_PARAMS)
-    if application_services_params[:service].is_a?(Hash)
-      Projects::ServicesController::FILTER_BLANK_PARAMS.each do |param|
-        application_services_params[:service].delete(param) if application_services_params[:service][param].blank? 
-      end
-    end
-    application_services_params
-  end
 end
diff --git a/app/controllers/concerns/service_params.rb b/app/controllers/concerns/service_params.rb
new file mode 100644
index 00000000000..471d15af913
--- /dev/null
+++ b/app/controllers/concerns/service_params.rb
@@ -0,0 +1,35 @@
+module ServiceParams
+  extend ActiveSupport::Concern
+
+  ALLOWED_PARAMS = [:title, :token, :type, :active, :api_key, :api_url, :api_version, :subdomain,
+                    :room, :recipients, :project_url, :webhook,
+                    :user_key, :device, :priority, :sound, :bamboo_url, :username, :password,
+                    :build_key, :server, :teamcity_url, :drone_url, :build_type,
+                    :description, :issues_url, :new_issue_url, :restrict_to_branch, :channel,
+                    :colorize_messages, :channels,
+                    :push_events, :issues_events, :merge_requests_events, :tag_push_events,
+                    :note_events, :build_events, :wiki_page_events,
+                    :notify_only_broken_builds, :add_pusher,
+                    :send_from_committer_email, :disable_diffs, :external_wiki_url,
+                    :notify, :color,
+                    :server_host, :server_port, :default_irc_uri, :enable_ssl_verification,
+                    :jira_issue_transition_id]
+
+  # Parameters to ignore if no value is specified
+  FILTER_BLANK_PARAMS = [:password]
+
+  def service_params
+    dynamic_params = []
+    dynamic_params.concat(@service.event_channel_names)
+
+    service_params = params.permit(:id, service: ALLOWED_PARAMS + dynamic_params)
+
+    if service_params[:service].is_a?(Hash)
+      FILTER_BLANK_PARAMS.each do |param|
+        service_params[:service].delete(param) if service_params[:service][param].blank?
+      end
+    end
+
+    service_params
+  end
+end
diff --git a/app/controllers/projects/services_controller.rb b/app/controllers/projects/services_controller.rb
index 1b91882048e..6a227d85f6f 100644
--- a/app/controllers/projects/services_controller.rb
+++ b/app/controllers/projects/services_controller.rb
@@ -1,20 +1,5 @@
 class Projects::ServicesController < Projects::ApplicationController
-  ALLOWED_PARAMS = [:title, :token, :type, :active, :api_key, :api_url, :api_version, :subdomain,
-                    :room, :recipients, :project_url, :webhook,
-                    :user_key, :device, :priority, :sound, :bamboo_url, :username, :password,
-                    :build_key, :server, :teamcity_url, :drone_url, :build_type,
-                    :description, :issues_url, :new_issue_url, :restrict_to_branch, :channel,
-                    :colorize_messages, :channels,
-                    :push_events, :issues_events, :merge_requests_events, :tag_push_events,
-                    :note_events, :build_events, :wiki_page_events,
-                    :notify_only_broken_builds, :add_pusher,
-                    :send_from_committer_email, :disable_diffs, :external_wiki_url,
-                    :notify, :color,
-                    :server_host, :server_port, :default_irc_uri, :enable_ssl_verification,
-                    :jira_issue_transition_id]
-
-  # Parameters to ignore if no value is specified
-  FILTER_BLANK_PARAMS = [:password]
+  include ServiceParams
 
   # Authorize
   before_action :authorize_admin_project!
@@ -33,7 +18,7 @@ class Projects::ServicesController < Projects::ApplicationController
   end
 
   def update
-    if @service.update_attributes(service_params)
+    if @service.update_attributes(service_params[:service])
       redirect_to(
         edit_namespace_project_service_path(@project.namespace, @project,
                                             @service.to_param, notice:
@@ -64,12 +49,4 @@ class Projects::ServicesController < Projects::ApplicationController
   def service
     @service ||= @project.services.find { |service| service.to_param == params[:id] }
   end
-
-  def service_params
-    service_params = params.require(:service).permit(ALLOWED_PARAMS)
-    FILTER_BLANK_PARAMS.each do |param|
-      service_params.delete(param) if service_params[param].blank?
-    end
-    service_params
-  end
 end