operator: add app update checker route

src/routes/apps.js

@@ -40,6 +40,7 @@ exports = module.exports = {
     restart,
     exec,
     execWebSocket,
+    checkForUpdates,
 
     clone,
 
@@ -57,6 +58,7 @@ const apps = require('../apps.js'),
     HttpError = require('connect-lastmile').HttpError,
     HttpSuccess = require('connect-lastmile').HttpSuccess,
     safe = require('safetydance'),
+    updateChecker = require('../updatechecker.js'),
     users = require('../users.js'),
     WebSocket = require('ws');
 
@@ -801,6 +803,8 @@ async function setMounts(req, res, next) {
 }
 
 async function listEventlog(req, res, next) {
+    assert.strictEqual(typeof req.app, 'object');
+
     const page = typeof req.query.page !== 'undefined' ? parseInt(req.query.page) : 1;
     if (!page || page < 0) return next(new HttpError(400, 'page query param has to be a postive number'));
 
@@ -812,3 +816,13 @@ async function listEventlog(req, res, next) {
 
     next(new HttpSuccess(200, { eventlogs }));
 }
+
+async function checkForUpdates(req, res, next) {
+    assert.strictEqual(typeof req.app, 'object');
+
+    // it can take a while sometimes to get all the app updates one by one
+    req.clearTimeout();
+
+    await updateChecker.checkForUpdates({ automatic: false }); // appId argument is ignored for the moment
+    next(new HttpSuccess(200, { update: updateChecker.getUpdateInfo() }));
+}