1 files changed, 41 insertions, 0 deletions
diff --git a/app/controllers/authenticated_controller.rb b/app/controllers/authenticated_controller.rb
new file mode 100644
index 0000000..2602064
--- /dev/null
+++ b/app/controllers/authenticated_controller.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+# The father class of all the controllers that require authentication.
+class AuthenticatedController < ApplicationController
+  before_action :validate_jwt
+
+  private
+
+  def validate_jwt
+    return if valid_token
+
+    render json: { error_message: 'Token inválido' }, status: :unauthorized
+  end
+
+  def decoded_token
+    @decoded_token ||= JWT.decode(authentication_token, ENV['HMAC_SECRET_KEY'], true, { algorithm: 'HS512' })
+  rescue JWT::ExpiredSignature
+    @decoded_token = nil
+  end
+
+  def current_user_account
+    return if decoded_token.nil?
+
+    email = decoded_token[0]['data']
+    @current_user_account ||= UserAccount.find_by(email:)
+  end
+
+  def authentication_token
+    @authentication_token ||= request.headers[:authorization]&.sub(/^Bearer /, '')
+  end
+
+  def valid_token
+    !(decoded_token.nil? || current_user_account&.session_key.nil? || invalid_jti)
+  end
+
+  def invalid_jti
+    return false if current_user_account.nil? || decoded_token.nil?
+
+    current_user_account.session_key != decoded_token[0]['jti']
+  end
+end