initial commit

app/helpers/sessions_helper.rb

@@ -0,0 +1,18 @@
+module SessionsHelper
+  # Logs a user into GreenLight.
+  def login(user)
+    session[:user_id] = user.id
+    redirect_to room_path(user.room.uid)
+  end
+
+  # Logs current user out of GreenLight.
+  def logout
+    session.delete(:user_id) if current_user
+    redirect_to root_path
+  end
+
+  # Retrieves the current user.
+  def current_user
+    @current_user ||= User.find_by(id: session[:user_id])
+  end
+end