Use only webhook for slack service integration.

app/controllers/projects/services_controller.rb

@@ -40,7 +40,7 @@ class Projects::ServicesController < Projects::ApplicationController
   def service_params
     params.require(:service).permit(
       :title, :token, :type, :active, :api_key, :subdomain,
-      :room, :recipients, :project_url,
+      :room, :recipients, :project_url, :webhook
       :user_key, :device, :priority, :sound
     )
   end

app/models/project_services/slack_service.rb

@@ -13,10 +13,8 @@
 #
 
 class SlackService < Service
-  prop_accessor :room, :subdomain, :token
-  validates :room, presence: true, if: :activated?
-  validates :subdomain, presence: true, if: :activated?
-  validates :token, presence: true, if: :activated?
+  prop_accessor :webhook
+  validates :webhook, presence: true, if: :activated?
 
   def title
     'Slack'
@@ -32,9 +30,7 @@ class SlackService < Service
 
   def fields
     [
-      { type: 'text', name: 'subdomain', placeholder: '' },
-      { type: 'text', name: 'token',     placeholder: '' },
-      { type: 'text', name: 'room',      placeholder: 'Ex. #general' },
+      { type: 'text', name: 'webhook', placeholder: '' }
     ]
   end
 
@@ -44,9 +40,10 @@ class SlackService < Service
       project_name: project_name
     ))
 
+    credentials = webhook.match(/(\w*).slack.com.*token=(\w*)/)
+    subdomain =  credentials[1]
+    token = credentials[2]
     notifier = Slack::Notifier.new(subdomain, token)
-    notifier.channel = room
-    notifier.username = 'GitLab'
     notifier.ping(message.pretext, attachments: message.attachments)
   end
 

features/steps/project/services.rb

@@ -108,16 +108,12 @@ class Spinach::Features::ProjectServices < Spinach::FeatureSteps
 
   step 'I fill Slack settings' do
     check 'Active'
-    fill_in 'Subdomain', with: 'gitlab'
-    fill_in 'Room', with: '#gitlab'
-    fill_in 'Token', with: 'verySecret'
+    fill_in 'Webhook', with: 'https://gitlabhq.slack.com/services/hooks?token=cdIj4r4LfXUOySDUjp0tk3OI'
     click_button 'Save'
   end
 
   step 'I should see Slack service settings saved' do
-    find_field('Subdomain').value.should == 'gitlab'
-    find_field('Room').value.should == '#gitlab'
-    find_field('Token').value.should == 'verySecret'
+    find_field('Webhook').value.should == 'https://gitlabhq.slack.com/services/hooks?token=cdIj4r4LfXUOySDUjp0tk3OI'
   end
 
   step 'I click Pushover service link' do