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

8 files changed, 141 insertions, 106 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
diff --git a/app/helpers/services_helper.rb b/app/helpers/services_helper.rb
new file mode 100644
index 00000000000..2dd0bf5d71e
--- /dev/null
+++ b/app/helpers/services_helper.rb
@@ -0,0 +1,25 @@
+module ServicesHelper
+  def service_event_description(event)
+    case event
+    when "push"
+      "Event will be triggered by a push to the repository"
+    when "tag_push"
+      "Event will be triggered when a new tag is pushed to the repository"
+    when "note"
+      "Event will be triggered when someone adds a comment"
+    when "issue"
+      "Event will be triggered when an issue is created/updated/merged"
+    when "merge_request"
+      "Event will be triggered when a merge request is created/updated/merged"
+    when "build"
+      "Event will be triggered when a build status changes"
+    when "wiki_page"
+      "Event will be triggered when a wiki page is created/updated"
+    end
+  end
+
+  def service_event_field_name(event)
+    event = event.pluralize if %w[merge_request issue].include?(event)
+    "#{event}_events"
+  end
+end
diff --git a/app/models/project_services/slack_service.rb b/app/models/project_services/slack_service.rb
index cf9e4d5a8b6..abbc780dc1a 100644
--- a/app/models/project_services/slack_service.rb
+++ b/app/models/project_services/slack_service.rb
@@ -4,6 +4,9 @@ class SlackService < Service
   validates :webhook, presence: true, url: true, if: :activated?
 
   def initialize_properties
+    # Custom serialized properties initialization
+    self.supported_events.each { |event| self.class.prop_accessor(event_channel_name(event)) }
+
     if properties.nil?
       self.properties = {}
       self.notify_only_broken_builds = true
@@ -29,13 +32,15 @@ class SlackService < Service
   end
 
   def fields
-    [
-      { type: 'text', name: 'webhook',
-        placeholder: 'https://hooks.slack.com/services/...' },
-      { type: 'text', name: 'username', placeholder: 'username' },
-      { type: 'text', name: 'channel', placeholder: '#channel' },
-      { type: 'checkbox', name: 'notify_only_broken_builds' },
-    ]
+    default_fields =
+      [
+        { type: 'text', name: 'webhook',   placeholder: 'https://hooks.slack.com/services/...' },
+        { type: 'text', name: 'username', placeholder: 'username' },
+        { type: 'text', name: 'channel', placeholder: "#general" },
+        { type: 'checkbox', name: 'notify_only_broken_builds' },
+      ]
+
+    default_fields + build_event_channels
   end
 
   def supported_events
@@ -74,7 +79,10 @@ class SlackService < Service
       end
 
     opt = {}
-    opt[:channel] = channel if channel
+
+    event_channel = get_channel_field(object_kind) || channel
+
+    opt[:channel] = event_channel if event_channel
     opt[:username] = username if username
 
     if message
@@ -83,8 +91,35 @@ class SlackService < Service
     end
   end
 
+  def event_channel_names
+    supported_events.map { |event| event_channel_name(event) }
+  end
+
+  def event_field(event)
+    fields.find { |field| field[:name] == event_channel_name(event) }
+  end
+
+  def global_fields
+    fields.reject { |field| field[:name].end_with?('channel') }
+  end
+
   private
 
+  def get_channel_field(event)
+    field_name = event_channel_name(event)
+    self.public_send(field_name)
+  end
+
+  def build_event_channels
+    supported_events.reduce([]) do |channels, event|
+      channels << { type: 'text', name: event_channel_name(event), placeholder: "#general" }
+    end
+  end
+
+  def event_channel_name(event)
+    "#{event}_channel"
+  end
+
   def project_name
     project.name_with_namespace.gsub(/\s/, '')
   end
diff --git a/app/models/service.rb b/app/models/service.rb
index 4821096379c..a8e1cc2f422 100644
--- a/app/models/service.rb
+++ b/app/models/service.rb
@@ -82,6 +82,18 @@ class Service < ActiveRecord::Base
     Gitlab::PushDataBuilder.build_sample(project, user)
   end
 
+  def event_channel_names
+    []
+  end
+
+  def event_field(event)
+    nil
+  end
+
+  def global_fields
+    fields
+  end
+
   def supported_events
     %w(push tag_push issue merge_request wiki_page)
   end
diff --git a/app/views/projects/services/_form.html.haml b/app/views/projects/services/_form.html.haml
index 166dc4a01fc..752fbc21a11 100644
--- a/app/views/projects/services/_form.html.haml
+++ b/app/views/projects/services/_form.html.haml
@@ -8,6 +8,7 @@
   .col-lg-9
     = form_for(@service, as: :service, url: namespace_project_service_path(@project.namespace, @project, @service.to_param), method: :put, html: { class: 'form-horizontal' }) do |form|
       = render 'shared/service_settings', form: form
+
       = form.submit 'Save changes', class: 'btn btn-save'
       &nbsp;
       - if @service.valid? && @service.activated?
diff --git a/app/views/shared/_service_settings.html.haml b/app/views/shared/_service_settings.html.haml
index 4eaf7c2a025..5254d265918 100644
--- a/app/views/shared/_service_settings.html.haml
+++ b/app/views/shared/_service_settings.html.haml
@@ -10,69 +10,28 @@
   .col-sm-10
     = form.check_box :active
 
-- if @service.supported_events.length > 1
-  .form-group
-    = form.label :url, "Trigger", class: 'control-label'
-    .col-sm-10
-      - if @service.supported_events.include?("push")
-        %div
-          = form.check_box :push_events, class: 'pull-left'
-          .prepend-left-20
-            = form.label :push_events, class: 'list-label' do
-              %strong Push events
-            %p.light
-              This url will be triggered by a push to the repository
-      - if @service.supported_events.include?("tag_push")
-        %div
-          = form.check_box :tag_push_events, class: 'pull-left'
-          .prepend-left-20
-            = form.label :tag_push_events, class: 'list-label' do
-              %strong Tag push events
-            %p.light
-              This url will be triggered when a new tag is pushed to the repository
-      - if @service.supported_events.include?("note")
-        %div
-          = form.check_box :note_events, class: 'pull-left'
-          .prepend-left-20
-            = form.label :note_events, class: 'list-label' do
-              %strong Comments
-            %p.light
-              This url will be triggered when someone adds a comment
-      - if @service.supported_events.include?("issue")
-        %div
-          = form.check_box :issues_events, class: 'pull-left'
-          .prepend-left-20
-            = form.label :issues_events, class: 'list-label' do
-              %strong Issues events
-            %p.light
-              This url will be triggered when an issue is created/updated/merged
-      - if @service.supported_events.include?("merge_request")
-        %div
-          = form.check_box :merge_requests_events, class: 'pull-left'
-          .prepend-left-20
-            = form.label :merge_requests_events, class: 'list-label' do
-              %strong Merge Request events
-            %p.light
-              This url will be triggered when a merge request is created/updated/merged
-      - if @service.supported_events.include?("build")
-        %div
-          = form.check_box :build_events, class: 'pull-left'
-          .prepend-left-20
-            = form.label :build_events, class: 'list-label' do
-              %strong Build events
-            %p.light
-              This url will be triggered when a build status changes
-      - if @service.supported_events.include?("wiki_page")
-        %div
-          = form.check_box :wiki_page_events, class: 'pull-left'
-          .prepend-left-20
-            = form.label :wiki_page_events, class: 'list-label' do
-              %strong Wiki Page events
-            %p.light
-              This url will be triggered when a wiki page is created/updated
+.form-group
+  = form.label :url, "Trigger", class: 'control-label'
+
+  .col-sm-10
+    - @service.supported_events.each do |event|
+      %div
+        = form.check_box service_event_field_name(event), class: 'pull-left'
+        .prepend-left-20
+          = form.label service_event_field_name(event), class: 'list-label' do
+            %strong
+              = event.humanize
+
+      - field = @service.event_field(event)
+
+      - if field
+        %p
+          = form.text_field field[:name], class: "form-control", placeholder: field[:placeholder]
 
+      %p.light
+        = service_event_description(event)
 
-- @service.fields.each do |field|
+- @service.global_fields.each do |field|
   - type = field[:type]
 
   - if type == 'fieldset'