Add login root. Remove ceration type.

app/controllers/projects/clusters_controller.rb

 class Projects::ClustersController < Projects::ApplicationController
-  # before_action :authenticate_google_api
   before_action :cluster
-
+  before_action :authorize_google_api, except: [:login]
   # before_action :authorize_admin_clusters! # TODO: Authentication
 
+  def login
+    begin
+      @authorize_url = api_client.authorize_url
+    rescue GoogleApi::Authentication::ConfigMissingError
+    end
+  end
+
   def index
     if cluster
       redirect_to action: 'edit'
@@ -12,30 +18,10 @@ class Projects::ClustersController < Projects::ApplicationController
     end
   end
 
-  ##
-  # TODO: 
-  # - Show form for "Create on Google Container Engine"
-  # - Show form for "Use existing kubernets cluster"
-  # - If user has not authroized yet, Show "Sign in with Google" button
-  # - If user has already authroized, Skip "Sign in with Google" button
-  # - user.is_authenticated_for_gcp?
-  # - user.authenticate_for_gcp!
-  # - Create this module which can be used from view
   def new
-    unless session[GoogleApi::CloudPlatform::Client.token_in_session]
-      @authorize_url = api_client.authorize_url
-    end
   end
 
-  ##
-  # TODO: 
-  # - If create on GKE, Use Google::Apis::ContainerV1::ContainerService
-  # - If create manually, save in db (Prob, Project > Setting)
-  # - Dry up with Service
-  # - Transaction
-  # - Sidekiq
   def create
-    if params['creation_type'] == 'on_gke'
     # Create a cluster on GKE
     operation = api_client.projects_zones_clusters_create(
       params['gcp_project_id'], params['cluster_zone'], params['cluster_name'],
@@ -73,36 +59,13 @@ class Projects::ClustersController < Projects::ApplicationController
       cluster_name: params['cluster_name'],
       service: kubernetes_service
     )
-    elsif params['creation_type'] == 'manual'
-      # TODO: Transaction
-      project.kubernetes_service.save(
-        end_point: params['end_point'],
-        ca_cert: params['ca_cert'],
-        token: params['token'],
-        username: params['username'],
-        password: params['password'],
-        project_namespace: params['project_namespace']
-      )
-
-      project.clusters.create(
-        creation_type: params['creation_type'],
-        kubernetes_service: project.kubernetes_service
-      )
-    end
 
     redirect_to action: 'index'
   end
 
-  # TODO: Show results/status. Edits Swtich for enable/disable.
-  # If created with GKE, non-editable form. enable/disable switch.
-  # If created manually, editable form. enable/disable switch.
-  # GKE params are   on-off swtich
-  # Manul params are on-off swtich, Endpoint, CACert, k8s Token, Proj namespace.
   def edit
-    unless session[GoogleApi::CloudPlatform::Client.token_in_session]
-      @authorize_url = api_client.authorize_url
-      render :edit
-    end
+    # TODO: If on, do we override parameter?
+    # TODO: If off, do we override parameter?
   end
 
   def update
@@ -110,40 +73,13 @@ class Projects::ClustersController < Projects::ApplicationController
     render :edit
   end
 
-  # In presenter
-  # TODO: Generate a link to the cluster on GKE
-
-  def gcp_projects
-    # api_client.blah
-    # TODO: Return all avaiable GCP Projects.
-    # TODO: Return json
-    # TODO: Dry with concern
-  end
-
-  def gke_zones
-    # api_client.blah
-    # TODO: Return all avaiable zones on GKE.
-    # TODO: Return json
-    # TODO: Dry with concern
-  end
-
   private
 
-  # def authenticate_google_api
-  #   if cluster&.on_gke? && session[access_token_key].blank?
-  #     redirect_to api_client.authorize_url(callback_import_url)
-  #   end
-  # end
-
   def cluster
     # Each project has only one cluster, for now. In the future iteraiton, we'll support multiple clusters
     @cluster ||= project.clusters.last
   end
 
-  # def cluster_params
-  #   params.require(:cluster).permit(:aaa)
-  # end
-
   def api_client
     @api_client ||=
       GoogleApi::CloudPlatform::Client.new(
@@ -166,4 +102,10 @@ class Projects::ClustersController < Projects::ApplicationController
       token: token
     }
   end
+
+  def authorize_google_api
+    unless session[GoogleApi::CloudPlatform::Client.token_in_session]
+      redirect_to action: 'login'
+    end
+  end
 end

app/models/ci/cluster.rb

@@ -6,10 +6,5 @@ module Ci
     belongs_to :owner, class_name: 'User'
     belongs_to :service
 
-    enum creation_type: {
-      unknown: nil,
-      on_gke: 1,
-      manual: 2
-    }    
   end
 end

app/views/projects/clusters/_form.html.haml

 Create a new cluster
 %br
-Avaiable GCP project lists
-%br
-Avaiable zones
-%br
-= link_to "Create on Google Container Engine", namespace_project_clusters_path(@project.namespace, @project, creation_type: 'on_gke', cluster_name: "gke-test-creation#{Random.rand(100)}", gcp_project_id: 'xxx', cluster_zone: 'us-central1-a', cluster_size: '1', project_namespace: 'aaa', machine_type: '???'), method: :post
-%br
-= link_to "Use existing kubernets cluster", namespace_project_clusters_path(@project.namespace, @project, creation_type: 'manual', end_point: 'xxx.xxx.xxx.xxx', ca_cert: 'xxx...xxx', token: 'xxx', project_namespace: 'aaa'), method: :post
+= link_to "Create on Google Container Engine", namespace_project_clusters_path(@project.namespace, @project, cluster_name: "gke-test-creation#{Random.rand(100)}", gcp_project_id: 'gitlab-internal-153318', cluster_zone: 'us-central1-a', cluster_size: '1', project_namespace: 'aaa', machine_type: '???'), method: :post

app/views/projects/clusters/_login.html.haml

-Login
-%p= link_to("authenticate from here", @authorize_url)

app/views/projects/clusters/edit.html.haml

 edit/show cluster
-
-- if @authorize_url
-  = render "login"
-- else
-  = @cluster.inspect
\ No newline at end of file
+%br
+= @cluster.inspect

app/views/projects/clusters/login.html.haml

+Login
+%br
+- if @authorize_url
+  = link_to("authenticate from here", @authorize_url)
+- else
+  You have not configrued GitLab properly. So we can not proceed authentication. Please check if you have set up omniauth->providers->google_oauth2 in gitlab.yml

app/views/projects/clusters/new.html.haml

-- if @authorize_url
-  = render "login"
-- else
-  = render "form"
+Create a cluster
+%br
+= render "form"

changelogs/unreleased/gem-sm-bump-google-api-client-gem-from-0-8-6-to-0-13-6.yml

----
-title: Bump google-api-client Gem from 0.8.6 to 0.13.6
-merge_request: 
-author:
-type: other

config/routes/project.rb

@@ -185,8 +185,7 @@ constraints(ProjectUrlConstrainer.new) do
 
       resources :clusters, except: [:edit, :show, :destroy] do
         collection do
-          get :gcp_projects # TODO: This doesn't belong here. Grape or under user. Hint. Serilizer
-          get :gke_zones
+          get :login
           get :edit
         end
       end

db/migrate/20170924094327_create_ci_clusters.rb

@@ -9,7 +9,6 @@ class CreateCiClusters < ActiveRecord::Migration
 
       # General
       t.boolean :enabled, default: true
-      t.integer :creation_type # manual or on_gke
 
       # k8s integration specific
       t.string :project_namespace
@@ -30,14 +29,6 @@ class CreateCiClusters < ActiveRecord::Migration
       t.datetime_with_timezone :updated_at, null: false
     end
 
-    # create_table :ci_gke_clusters do |t|
-    #   t.integer :ci_cluster_id
-    #   t.string :gcp_project_id
-    #   t.string :cluster_zone
-    #   t.string :cluster_name
-    # end
-    # add_foreign_key :ci_gke_clusters, :ci_clusters
-
     # TODO: fk, index, encypt
 
     add_foreign_key :ci_clusters, :projects

db/schema.rb

@@ -272,7 +272,6 @@ ActiveRecord::Schema.define(version: 20170924094327) do
     t.integer "owner_id"
     t.integer "service_id"
     t.boolean "enabled", default: true
-    t.integer "creation_type"
     t.string "project_namespace"
     t.string "end_point"
     t.text "ca_cert"

lib/google_api/authentication.rb

@@ -2,28 +2,14 @@ module GoogleApi
   class Authentication
     attr_reader :access_token, :redirect_uri, :state
 
+    ConfigMissingError = Class.new(StandardError)
+
     def initialize(access_token, redirect_uri, state: nil)
       @access_token = access_token
       @redirect_uri = redirect_uri
       @state = state
     end
 
-    def client
-      return @client if defined?(@client)
-
-      unless config
-        raise 'OAuth configuration for google_oauth2 missing.'
-      end
-
-      @client = ::OAuth2::Client.new(
-        config.app_id,
-        config.app_secret,
-        site: 'https://accounts.google.com',
-        token_url: '/o/oauth2/token', 
-        authorize_url: '/o/oauth2/auth'
-      )
-    end
-
     def authorize_url
       client.auth_code.authorize_url(
         redirect_uri: redirect_uri,
@@ -47,5 +33,21 @@ module GoogleApi
     def config
       Gitlab.config.omniauth.providers.find { |provider| provider.name == "google_oauth2" }
     end
+
+    def client
+      return @client if defined?(@client)
+
+      unless config
+        raise ConfigMissingError
+      end
+
+      @client = ::OAuth2::Client.new(
+        config.app_id,
+        config.app_secret,
+        site: 'https://accounts.google.com',
+        token_url: '/o/oauth2/token', 
+        authorize_url: '/o/oauth2/auth'
+      )
+    end
   end
 end