[API v3] Maintenance Mode (#7367)

* WIP(maintenance): maintenance

* WIP(maintenance): working locale features

* fix(maintenance): don't translate info page target

* WIP(maintenance): start adding info page

* fix(maintenance): linting

* feat: Add container to maintenance info page

* fix(maintenance): add config.json edits
Also DRY variables for main vs info pages

* fix(maintenance): linting

* refactor(maintenance): further slim down variables

* refactor: Remove unnecessary variables

* fix: Correct string interpolation in maintenace view

* feat: Dynamically add time to maintenance pages

* maintenance mode: do not connect to mongodb

* fix(maintenance): clean up timezones etc.

* fix(maintenance): remove unneeded sprite

website/server/libs/api-v3/setupMongoose.js

@@ -5,19 +5,24 @@ import mongoose from 'mongoose';
 import Bluebird from 'bluebird';
 
 const IS_PROD = nconf.get('IS_PROD');
+const MAINTENANCE_MODE = nconf.get('MAINTENANCE_MODE');
 
 // Use Q promises instead of mpromise in mongoose
 mongoose.Promise = Bluebird;
 
-let mongooseOptions = !IS_PROD ? {} : {
-  replset: { socketOptions: { keepAlive: 120, connectTimeoutMS: 30000 } },
-  server: { socketOptions: { keepAlive: 120, connectTimeoutMS: 30000 } },
-};
+// Do not connect to MongoDB when in maintenance mode
+if (MAINTENANCE_MODE !== 'true') {
+  let mongooseOptions = !IS_PROD ? {} : {
+    replset: { socketOptions: { keepAlive: 120, connectTimeoutMS: 30000 } },
+    server: { socketOptions: { keepAlive: 120, connectTimeoutMS: 30000 } },
+  };
 
-const NODE_DB_URI = nconf.get('IS_TEST') ? nconf.get('TEST_DB_URI') : nconf.get('NODE_DB_URI');
-let db = mongoose.connect(NODE_DB_URI, mongooseOptions, (err) => {
-  if (err) throw err;
-  logger.info('Connected with Mongoose.');
-});
+  const NODE_DB_URI = nconf.get('IS_TEST') ? nconf.get('TEST_DB_URI') : nconf.get('NODE_DB_URI');
 
-autoinc.init(db);
+  let db = mongoose.connect(NODE_DB_URI, mongooseOptions, (err) => {
+    if (err) throw err;
+    logger.info('Connected with Mongoose.');
+  });
+
+  autoinc.init(db);
+}

website/server/middlewares/api-v3/index.js

@@ -14,6 +14,7 @@ import favicon from 'serve-favicon';
 import methodOverride from 'method-override';
 import passport from 'passport';
 import path from 'path';
+import maintenanceMode from './maintenanceMode';
 import {
   forceSSL,
   forceHabitica,
@@ -48,6 +49,8 @@ module.exports = function attachMiddlewares (app, server) {
   app.use(compression());
   app.use(favicon(`${PUBLIC_DIR}/favicon.ico`));
 
+  app.use(maintenanceMode);
+
   app.use(cors);
   app.use(forceSSL);
   app.use(forceHabitica);

website/server/middlewares/api-v3/maintenanceMode.js

@@ -0,0 +1,31 @@
+import { getUserLanguage } from './language';
+import nconf from 'nconf';
+
+const MAINTENANCE_MODE = nconf.get('MAINTENANCE_MODE');
+
+module.exports = function maintenanceMode (req, res, next) {
+  if (MAINTENANCE_MODE !== 'true') return next();
+
+  getUserLanguage(req, res, (err) => {
+    if (err) return next(err);
+
+    let pageVariables = {
+      maintenanceStart: nconf.get('MAINTENANCE_START'),
+      maintenanceEnd: nconf.get('MAINTENANCE_END'),
+      translation: res.t,
+    };
+
+    if (req.headers && req.headers.accept && req.headers.accept.indexOf('text/html') !== -1) {
+      if (req.path === '/views/static/maintenance-info') {
+        return res.status(503).render('../../../views/static/maintenance-info', pageVariables);
+      } else {
+        return res.status(503).render('../../../views/static/maintenance', pageVariables);
+      }
+    } else {
+      return res.status(503).send({
+        error: 'Maintenance',
+        message: 'Server offline for maintenance.',
+      });
+    }
+  });
+};