Merge pull request #46 from betagouv/maintenance

app: add a maintenance mode

app/controllers/application_controller.rb

@@ -1,14 +1,24 @@
 # frozen_string_literal: true
 
 class ApplicationController < ActionController::Base
-  before_action :set_establishment
+  before_action :check_maintenance, :set_establishment
 
   def after_sign_in_path_for(_resource)
     classes_path
   end
 
   protected
 
+  def check_maintenance
+    return if request.path == maintenance_path # or endless redirect
+
+    redirect_to maintenance_path if maintenance_mode?
+  end
+
+  def maintenance_mode?
+    ENV.fetch("APLYPRO_MAINTENANCE_REASON", nil).present?
+  end
+
   def set_establishment
     @etab = current_principal&.establishment
   end

app/controllers/home_controller.rb

@@ -7,6 +7,10 @@ def index
     redirect_to login_url
   end
 
+  def maintenance
+    @msg = ENV.fetch("APLYPRO_MAINTENANCE_REASON")
+  end
+
   def login
     infer_page_title
   end

app/views/home/maintenance.html.haml

@@ -0,0 +1,5 @@
+.fr-grid-row
+  .fr-md-6
+    %h1 Aplypro n'est pas disponible pour le moment.
+
+    %p= @msg

config/routes.rb

@@ -38,6 +38,7 @@
 
   root "home#index"
 
+  get "/maintenance", to: "home#maintenance"
   get "/login", to: "home#login"
   get "/select_etab", to: "home#select_etab"
 end