From 98320048ea8f36eea0ed39acaa58cb0d88797514 Mon Sep 17 00:00:00 2001
From: Ashwin Srinivasan <fishdev@users.noreply.github.com>
Date: Fri, 25 Jan 2019 12:10:39 -0500
Subject: [PATCH] Added version checking

---
 server/package-lock.json | 32 ++++++++++++++++++++++++++++++++
 server/package.json      |  1 +
 server/routes/admin.js   |  5 +++++
 server/util/version.js   | 22 ++++++++++++++++++++++
 server/views/admin.hbs   | 18 +++++++++++++++++-
 5 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 server/util/version.js

diff --git a/server/package-lock.json b/server/package-lock.json
index a8bf5c3..da9a5c0 100644
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -198,6 +198,15 @@
       "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
       "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
     },
+    "axios": {
+      "version": "0.18.0",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-0.18.0.tgz",
+      "integrity": "sha1-MtU+SFHv3AoRmTts0AB4nXDAUQI=",
+      "requires": {
+        "follow-redirects": "^1.3.0",
+        "is-buffer": "^1.1.5"
+      }
+    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -1106,6 +1115,24 @@
         "write": "^0.2.1"
       }
     },
+    "follow-redirects": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.6.1.tgz",
+      "integrity": "sha512-t2JCjbzxQpWvbhts3l6SH1DKzSrx8a+SsaVf4h6bG4kOXUuPYS/kg2Lr4gQSb7eemaHqJkOThF1BGyjlUkO1GQ==",
+      "requires": {
+        "debug": "=3.1.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+          "requires": {
+            "ms": "2.0.0"
+          }
+        }
+      }
+    },
     "forever-agent": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
@@ -1513,6 +1540,11 @@
       "resolved": "https://registry.npmjs.org/is-arrayish/-/is-arrayish-0.2.1.tgz",
       "integrity": "sha1-d8mYQFJ6qOyxqLppe4BkWnqSap0="
     },
+    "is-buffer": {
+      "version": "1.1.6",
+      "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz",
+      "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w=="
+    },
     "is-builtin-module": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-builtin-module/-/is-builtin-module-1.0.0.tgz",
diff --git a/server/package.json b/server/package.json
index 55afbd9..63736dd 100644
--- a/server/package.json
+++ b/server/package.json
@@ -7,6 +7,7 @@
   },
   "author": "QuantumStack",
   "dependencies": {
+    "axios": "^0.18.0",
     "body-parser": "^1.18.3",
     "cookie-parser": "~1.4.3",
     "debug": "~2.6.9",
diff --git a/server/routes/admin.js b/server/routes/admin.js
index 337b14f..c945a40 100644
--- a/server/routes/admin.js
+++ b/server/routes/admin.js
@@ -4,6 +4,7 @@ const json2csv = require('json2csv').parse;
 const User = require('./../models/User');
 const Entry = require('./../models/Entry');
 const adminRequired = require('./../util/adminRequired');
+const version = require('./../util/version');
 
 const router = express.Router();
 
@@ -17,6 +18,7 @@ router.get('/lab', adminRequired, (req, res) => {
     course: process.env.CMULAB_COURSE,
     loc: process.env.CMULAB_LOC,
     isLab: true,
+    version: version(),
   });
 });
 
@@ -25,6 +27,7 @@ router.get('/csv', adminRequired, (req, res) => {
     course: process.env.CMULAB_COURSE,
     loc: process.env.CMULAB_LOC,
     isCsv: true,
+    version: version(),
   });
 });
 
@@ -33,6 +36,7 @@ router.get('/delete', adminRequired, (req, res) => {
     course: process.env.CMULAB_COURSE,
     loc: process.env.CMULAB_LOC,
     isDelete: true,
+    version: version(),
   });
 });
 
@@ -44,6 +48,7 @@ router.get('/users', adminRequired, (req, res, next) => {
       loc: process.env.CMULAB_LOC,
       isUsers: true,
       users,
+      version: version(),
     });
   });
 });
diff --git a/server/util/version.js b/server/util/version.js
new file mode 100644
index 0000000..9b43695
--- /dev/null
+++ b/server/util/version.js
@@ -0,0 +1,22 @@
+const axios = require('axios');
+
+const current = 'v1.0';
+let latest;
+
+function check() {
+  axios.get('https://api.github.com/repos/QuantumStack/CMULab/releases')
+    .then((res) => {
+      latest = res.data[0].tag_name;
+    })
+    .catch(() => {
+      latest = current;
+    });
+}
+
+check();
+setInterval(check, 86400000);
+
+module.exports = () => {
+  if (current === latest) return { update: false };
+  return { update: true, latest, current };
+};
diff --git a/server/views/admin.hbs b/server/views/admin.hbs
index 5ef6767..fac3d6b 100644
--- a/server/views/admin.hbs
+++ b/server/views/admin.hbs
@@ -1,6 +1,22 @@
 <br />
 <center><a href="/" class="tag is-primary is-large is-rounded">CMULab</a> &nbsp;<span class="title is-5"> {{course}}</span></center>
-<br />
+
+{{#if version.update}}
+	<section class="section">
+		<div class="container">
+			<article class="message is-warning">
+				<div class="message-header">
+					<p>CMULab Update Available!</p>
+				</div>
+				<div class="message-body">
+					QuantumStack has released a <strong>new version</strong> of CMULab. You are currently using {{version.current}}, but <strong>{{version.latest}}</strong> is now available. Please visit our <a href="https://github.com/QuantumStack/CMULab">GitHub repository</a> to download the update and deploy it onto your CMULab instance. Go to the <a href="https://github.com/QuantumStack/CMULab/releases/tag/{{version.latest}}">release page</a> to see what's new.
+				</div>
+			</article>
+		</div>
+	</section>
+{{else}}
+	<br />
+{{/if}}
 
 <div class="tabs is-centered is-boxed is-small">
 	<ul>