Added Gitlab::OAuth::User class

Authenticate or create users from OAuth providers

lib/gitlab/oauth/user.rb

+# OAuth extension for User model
+#
+# * Find GitLab user based on omniauth uid and provider
+# * Create new user from omniauth data
+#
+module Gitlab
+  module OAuth
+    class User
+      class << self
+        attr_reader :auth
+
+        def find(auth)
+          @auth = auth
+          find_by_uid_and_provider
+        end
+
+        def create(auth)
+          @auth = auth
+          password = Devise.friendly_token[0, 8].downcase
+          opts = {
+            extern_uid: uid,
+            provider: provider,
+            name: name,
+            username: username,
+            email: email,
+            password: password,
+            password_confirmation: password,
+          }
+
+          user = model.new(opts, as: :admin).with_defaults
+          user.save!
+          log.info "(OAuth) Creating user #{email} from login with extern_uid => #{uid}"
+
+          if Gitlab.config.omniauth['block_auto_created_users'] && !ldap?
+            user.block
+          end
+
+          user
+        end
+
+        private
+
+        def find_by_uid_and_provider
+          model.where(provider: provider, extern_uid: uid).last
+        end
+
+        def uid
+          auth.info.uid || auth.uid
+        end
+
+        def email
+          auth.info.email.downcase unless auth.info.email.nil?
+        end
+
+        def name
+          auth.info.name.to_s.force_encoding("utf-8")
+        end
+
+        def username
+          email.match(/^[^@]*/)[0]
+        end
+
+        def provider
+          auth.provider
+        end
+
+        def log
+          Gitlab::AppLogger
+        end
+
+        def model
+          ::User
+        end
+
+        def raise_error(message)
+          raise OmniAuth::Error, "(OAuth) " + message
+        end
+
+        def ldap?
+          provider == 'ldap'
+        end
+      end
+    end
+  end
+end