From 9ddc05758923169433a4344c7f576f450f0558cf Mon Sep 17 00:00:00 2001
From: farhatahmad <35435341+farhatahmad@users.noreply.github.com>
Date: Thu, 22 Aug 2019 12:15:01 -0400
Subject: [PATCH] Added a Maintenance Window flash (#758)

---
 app/assets/javascripts/cookies.js         | 7 +++++++
 app/controllers/application_controller.rb | 7 ++++++-
 app/views/shared/_flash_messages.html.erb | 5 +++++
 config/application.rb                     | 4 ++++
 config/locales/en.yml                     | 2 ++
 sample.env                                | 6 ++++++
 6 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/app/assets/javascripts/cookies.js b/app/assets/javascripts/cookies.js
index efd9d69f..be2c0560 100644
--- a/app/assets/javascripts/cookies.js
+++ b/app/assets/javascripts/cookies.js
@@ -24,4 +24,11 @@ $(document).on('turbolinks:load', function(){
     //hide the banner at the bottom
     $(".cookies-banner").attr("style","display:none !important")
   })
+
+  $("#maintenance-close").click(function(event) {
+    //create a cookie that lasts 1 year
+    var cookieDate = new Date();
+    cookieDate.setFullYear(cookieDate.getFullYear() + 1); //1 year from now
+    document.cookie = "maintenance_window=" + $(event.target).data("date") + "; path=/; expires=" + cookieDate.toUTCString() + ";"
+  })
 })
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 833ac5b7..7202898a 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -53,7 +53,7 @@ class ApplicationController < ActionController::Base
   end
 
   def maintenance_mode?
-    if ENV["MAINTENANCE_MODE"] == "true"
+    if Rails.configuration.maintenance_mode
       render "errors/greenlight_error", status: 503, formats: :html,
         locals: {
           status_code: 503,
@@ -61,6 +61,11 @@ class ApplicationController < ActionController::Base
           help: I18n.t("errors.maintenance.help"),
         }
     end
+    if Rails.configuration.maintenance_window.present?
+      unless cookies[:maintenance_window] == Rails.configuration.maintenance_window
+        flash.now[:maintenance] = I18n.t("maintenance.window_alert", date: Rails.configuration.maintenance_window)
+      end
+    end
   end
 
   # Sets the appropriate locale.
diff --git a/app/views/shared/_flash_messages.html.erb b/app/views/shared/_flash_messages.html.erb
index 6e863608..cd03782d 100644
--- a/app/views/shared/_flash_messages.html.erb
+++ b/app/views/shared/_flash_messages.html.erb
@@ -24,6 +24,11 @@
       <button type="button" class="close" data-dismiss="alert">&times</button>
       <%= value.html_safe %>
     </div>
+  <% elsif key.eql? "maintenance" %>
+    <div class="alert alert-info alert-dismissible text-center mb-0">
+      <%= value.html_safe %>
+      <button id="maintenance-close" type="button" data-date="<%= Rails.configuration.maintenance_window %>" class="close" data-dismiss="alert">&times</button>
+    </div>
   <% elsif key.eql? "info" %>
     <div class="alert alert-info alert-dismissible text-center mb-0">
       <button type="button" class="close" data-dismiss="alert">&times</button>
diff --git a/config/application.rb b/config/application.rb
index b9ae60fe..467bf900 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -118,6 +118,10 @@ module Greenlight
 
     config.google_analytics = ENV["GOOGLE_ANALYTICS_TRACKING_ID"].present?
 
+    # MAINTENANCE
+    config.maintenance_window = ENV["MAINTENANCE_WINDOW"]
+    config.maintenance_mode = ENV["MAINTENANCE_MODE"] == "true"
+
     # DEFAULTS
 
     # Default branding image if the user does not specify one
diff --git a/config/locales/en.yml b/config/locales/en.yml
index ce9dee19..6bca4ec9 100755
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -285,6 +285,8 @@ en:
         verify_text: 'To verify your account, just follow this link: %{url}'
         verify_link: Verify Account
         thanks: Thanks for joining and have a great day!
+  maintenance:
+    window_alert: Maintenance window scheduled for %{date}
   max_concurrent: The maximum number of concurrent sessions allowed has been reached!
   modal:
     create_role:
diff --git a/sample.env b/sample.env
index e11137d9..7039efee 100644
--- a/sample.env
+++ b/sample.env
@@ -156,6 +156,12 @@ ENABLE_GOOGLE_CALENDAR_BUTTON=
 # false: Application runs normally
 MAINTENANCE_MODE=false
 
+# Displays a flash that appears to inform the user of a scheduled maintenance window
+# This variable should contain ONLY the date and time of the scheduled maintenance
+#
+# Ex: MAINTENANCE_WINDOW=Friday August 18 6pm-10pm EST
+MAINTENANCE_WINDOW=
+
 # Comment this out to send logs to STDOUT in production instead of log/production.log .
 #
 # RAILS_LOG_TO_STDOUT=true