COR-749: Set up Flipper

Gemfile

@@ -103,6 +103,11 @@ gem 'ng-rails-csrf', '~> 0.1.0'
 gem 'bootstrap-tagsinput-rails', '~> 0.4.2'
 gem 'dialog-polyfill-rails', '~> 0.4.5'
 
+# Feature Flagging
+gem 'flipper', '~> 0.10'
+gem 'flipper-ui', '~> 0.10'
+gem 'flipper-active_record', '~> 0.10'
+
 group :tasks do
   # Parsing
   gem 'nokogiri'

Gemfile.lock

@@ -208,6 +208,15 @@ GEM
     ffi (1.9.17)
     fission (0.5.0)
       CFPropertyList (~> 2.2)
+    flipper (0.10.2)
+    flipper-active_record (0.10.2)
+      activerecord (>= 3.2, < 6)
+      flipper (~> 0.10.2)
+    flipper-ui (0.10.2)
+      erubis (~> 2.7.0)
+      flipper (~> 0.10.2)
+      rack (>= 1.4, < 3)
+      rack-protection (>= 1.5.3, < 2.1.0)
     fog (1.38.0)
       fog-aliyun (>= 0.1.0)
       fog-atmos
@@ -739,6 +748,9 @@ DEPENDENCIES
   excon (~> 0.55.0)
   factory_girl_rails (~> 4.8)
   faker (~> 1.7)
+  flipper (~> 0.10)
+  flipper-active_record (~> 0.10)
+  flipper-ui (~> 0.10)
   fog (~> 1.38.0)
   font-awesome-sass (~> 4.7.0)
   foreman

app/helpers/application_helper.rb

@@ -12,4 +12,8 @@ def extra_config
   def qualtrics_domain
   	extra_config.qualtrics_id.delete('_').downcase
   end
+
+  def flag_enabled?(flag_name)
+    Cortex.flipper[flag_name].enabled?(current_user, request)
+  end
 end

config/initializers/flipper.rb

@@ -0,0 +1,13 @@
+module Cortex
+  def self.flipper
+    @flipper ||= Flipper.new(Flipper::Adapters::ActiveRecord.new)
+  end
+end
+
+Cortex::Application.config.middleware.use Flipper::Middleware::Memoizer, Cortex.flipper
+
+Flipper.register(:internal) { |request| request.internal? }
+Flipper.register(:authenticated) { |request| request.session[:current_user].present? && request.session[:current_user][:authenticated] }
+Flipper.register(:cortex) { |request| request.host == 'admin.cbcortex.com' }
+Flipper.register(:dev) { |request| request.host == 'dev.admin.cbcortex.com' || request.host == 'localhost' }
+Flipper.register(:staging) { |request| request.host == 'stg.admin.cbcortex.com' }

config/routes.rb

@@ -35,4 +35,12 @@
   # API
   ::API.logger Rails.logger
   mount ::API => '/api'
+
+  # Flipper
+  authenticated :user, lambda {|u| u.is_admin? } do
+    flipper_block = lambda {
+      Cortex.flipper
+    }
+    mount Flipper::UI.app(flipper_block) => '/flipper'
+  end
 end

db/migrate/20170417185915_create_flipper_tables.rb

@@ -0,0 +1,22 @@
+class CreateFlipperTables < ActiveRecord::Migration
+  def self.up
+    create_table :flipper_features do |t|
+      t.string :key, null: false
+      t.timestamps null: false
+    end
+    add_index :flipper_features, :key, unique: true
+
+    create_table :flipper_gates do |t|
+      t.string :feature_key, null: false
+      t.string :key, null: false
+      t.string :value
+      t.timestamps null: false
+    end
+    add_index :flipper_gates, [:feature_key, :key, :value], unique: true
+  end
+
+  def self.down
+    drop_table :flipper_gates
+    drop_table :flipper_features
+  end
+end

db/schema.rb

@@ -175,6 +175,22 @@
     t.index ["id"], name: "index_fields_on_id", using: :btree
   end
 
+  create_table "flipper_features", force: :cascade do |t|
+    t.string   "key",        null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["key"], name: "index_flipper_features_on_key", unique: true, using: :btree
+  end
+
+  create_table "flipper_gates", force: :cascade do |t|
+    t.string   "feature_key", null: false
+    t.string   "key",         null: false
+    t.string   "value"
+    t.datetime "created_at",  null: false
+    t.datetime "updated_at",  null: false
+    t.index ["feature_key", "key", "value"], name: "index_flipper_gates_on_feature_key_and_key_and_value", unique: true, using: :btree
+  end
+
   create_table "locales", id: :uuid, default: -> { "uuid_generate_v4()" }, force: :cascade do |t|
     t.string   "name",            null: false
     t.integer  "localization_id"