Feature: SignIn with Twitter (#479)

* Add Twitter SignIn flow

Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/controllers/twitter/authorizations_controller.rb

@@ -0,0 +1,30 @@
+class Twitter::AuthorizationsController < Twitter::BaseController
+  def create
+    @response = twitter_client.request_oauth_token(url: twitter_callback_url)
+
+    if @response.status == '200'
+      ::Redis::Alfred.setex(oauth_token, account.id)
+      redirect_to oauth_authorize_endpoint(oauth_token)
+    else
+      redirect_to app_new_twitter_inbox_url
+    end
+  end
+
+  private
+
+  def oauth_token
+    parsed_body['oauth_token']
+  end
+
+  def user
+    @user ||= User.find_by(id: params[:user_id])
+  end
+
+  def account
+    @account ||= user.account
+  end
+
+  def oauth_authorize_endpoint(oauth_token)
+    "#{twitter_api_base_url}/oauth/authorize?oauth_token=#{oauth_token}"
+  end
+end