Make service code more abstract

app/controllers/services_controller.rb

 class ServicesController < ProjectResourceController
   # Authorize
   before_filter :authorize_admin_project!
+  before_filter :service, only: [:edit, :update, :test]
 
   respond_to :html
 
   def index
-    @gitlab_ci_service = @project.gitlab_ci_service
+    @project.build_missing_services
+    @services = @project.services
   end
 
   def edit
-    @service = @project.gitlab_ci_service
-
-    # Create if missing
-    @service = @project.create_gitlab_ci_service unless @service
   end
 
   def update
-    @service = @project.gitlab_ci_service
-
     if @service.update_attributes(params[:service])
-      redirect_to edit_project_service_path(@project, :gitlab_ci)
+      redirect_to edit_project_service_path(@project, @service.to_param)
     else
       render 'edit'
     end
@@ -28,9 +24,14 @@ class ServicesController < ProjectResourceController
   def test
     data = GitPushService.new.sample_data(project, current_user)
 
-    @service = project.gitlab_ci_service
     @service.execute(data)
 
     redirect_to :back
   end
+
+  private
+
+  def service
+    @service ||= @project.services.find { |service| service.to_param == params[:id] }
+  end
 end

app/models/gitlab_ci_service.rb

@@ -54,4 +54,23 @@ class GitlabCiService < Service
   def status_img_path
     project_url + "/status.png?ref=" + project.default_branch
   end
+
+  def title
+    'GitLab CI'
+  end
+
+  def description
+    'Continuous integration server from GitLab'
+  end
+
+  def to_param
+    'gitlab_ci'
+  end
+
+  def fields
+    [
+      { type: 'text', name: 'token', placeholder: 'GitLab CI project specific token' },
+      { type: 'text', name: 'project_url', placeholder: 'http://ci.gitlabhq.com/projects/3'}
+    ]
+  end
 end

app/models/project.rb

@@ -48,6 +48,7 @@ class Project < ActiveRecord::Base
   has_one :forked_project_link, dependent: :destroy, foreign_key: "forked_to_project_id"
   has_one :forked_from_project, through: :forked_project_link
 
+  has_many :services,           dependent: :destroy
   has_many :events,             dependent: :destroy
   has_many :merge_requests,     dependent: :destroy
   has_many :issues,             dependent: :destroy, order: "state DESC, created_at DESC"
@@ -223,8 +224,18 @@ class Project < ActiveRecord::Base
     self.issues_enabled && !self.used_default_issues_tracker?
   end
 
-  def services
-    [gitlab_ci_service].compact
+  def build_missing_services
+    available_services_names.each do |service_name|
+      service = services.find { |service| service.to_param == service_name }
+
+      # If service is available but missing in db
+      # we should create an instance. Ex `create_gitlab_ci_service`
+      service = self.send :"create_#{service_name}_service" if service.nil?
+    end
+  end
+
+  def available_services_names
+    %w(gitlab_ci)
   end
 
   def gitlab_ci?

app/models/service.rb

@@ -13,6 +13,8 @@
 #  project_url :string(255)
 #
 
+# To add new service you should build a class inherited from Service
+# and implement a set of methods
 class Service < ActiveRecord::Base
   attr_accessible :title, :token, :type, :active
 
@@ -24,4 +26,17 @@ class Service < ActiveRecord::Base
   def activated?
     active
   end
+
+  def title
+  end
+
+  def description
+  end
+
+  def to_param
+  end
+
+  def fields
+    []
+  end
 end

app/views/services/_form.html.haml

+%h3.page_title
+  - if @service.activated?
+    %span.cgreen
+      %i.icon-circle
+  - else
+    %span.cgray
+      %i.icon-circle-blank
+  = @service.title
+
+%p= @service.description
+
+.back_link
+  = link_to project_services_path(@project) do
+    ← to services
+
+%hr
+
+= form_for(@service, as: :service, url: project_service_path(@project, @service.to_param), method: :put) do |f|
+  - if @service.errors.any?
+    .alert.alert-error
+      %ul
+        - @service.errors.full_messages.each do |msg|
+          %li= msg
+
+
+  .control-group
+    = f.label :active, "Active", class: "control-label"
+    .controls
+      = f.check_box :active
+
+  - @service.fields.each do |field|
+    - name = field[:name]
+    - type = field[:type]
+    - placeholder = field[:placeholder]
+
+    .control-group
+      = f.label name, class: "control-label"
+      .controls
+        - if type == 'text'
+          = f.text_field name, class: "input-xlarge", placeholder: placeholder
+        - elsif type == 'checkbox'
+          = f.check_box name
+
+  .form-actions
+    = f.submit 'Save', class: 'btn btn-save'
+     
+    - if @service.valid? && @service.activated?
+      = link_to 'Test settings', test_project_service_path(@project, @service.to_param), class: 'btn btn-small'

app/views/services/_gitlab_ci.html.haml

-%h3.page_title
-  GitLab CI
-  %small Continuous integration server from GitLab
-  .pull-right
-    - if @service.active
-      %small.cgreen Enabled
-    - else
-      %small.cgray Disabled
-
-
-
-.back_link
-  = link_to project_services_path(@project) do
-    ← to services
-
-%hr
-= form_for(@service, :as => :service, :url => project_service_path(@project, :gitlab_ci), :method => :put) do |f|
-  - if @service.errors.any?
-    .alert.alert-error
-      %ul
-        - @service.errors.full_messages.each do |msg|
-          %li= msg
-
-
-  .control-group
-    = f.label :active, "Active", class: "control-label"
-    .controls
-      = f.check_box :active
-
-  .control-group
-    = f.label :project_url, "Project URL", class: "control-label"
-    .controls
-      = f.text_field :project_url, class: "input-xlarge", placeholder: "http://ci.gitlabhq.com/projects/3"
-
-  .control-group
-    = f.label :token, class: "control-label" do
-      CI Project token
-    .controls
-      = f.text_field :token, class: "input-xlarge", placeholder: "GitLab CI project specific token"
-
-
-  .form-actions
-    = f.submit 'Save', class: 'btn btn-save'
-     
-    - if @service.valid? && @service.active
-      = link_to 'Test settings', test_project_service_path(@project), class: 'btn btn-small'

app/views/services/edit.html.haml

 = render "projects/settings_nav"
 
-= render 'gitlab_ci'
+= render 'form'

app/views/services/index.html.haml

@@ -3,30 +3,16 @@
 %h3.page_title Services
 %br
 
-%ul.ui-box.well-list
+%ul.bordered-list
+  - @services.each do |service|
     %li
-    %h4.cgreen
-      = link_to edit_project_service_path(@project, :gitlab_ci) do
-        GitLab CI
-        %small Continuous integration server from GitLab
-      .pull-right
-        - if @gitlab_ci_service.try(:active)
-          %small.cgreen
-            %i.icon-ok
-            Enabled
-        - else
-          %small.cgray
-            %i.icon-off
-            Disabled
-  %li.disabled
-    %h4
-      Jenkins CI
-      %small An extendable open source continuous integration server
-      .pull-right
-        %small Not implemented yet
-  %li.disabled
       %h4
-      Campfire
-      %small Web-based group chat tool
-      .pull-right
-        %small Not implemented yet
+        - if service.activated?
+          %span.cgreen
+            %i.icon-circle
+        - else
+          %span.cgray
+            %i.icon-circle-blank
+        = link_to edit_project_service_path(@project, service.to_param) do
+          = service.title
+      %p= service.description