Check supported server version

Author: Yukaii

app.css

@@ -47,6 +47,11 @@ navbar.dark .control-buttons>*:hover {
 	color: white;
 }
 
+navbar.unsupported {
+	background-color: #b90000 !important;
+	color: white;
+}
+
 #navbar-container .control-buttons {
 	display: flex;
 }

ipc/consumer.js

@@ -1,6 +1,11 @@
 const {BrowserWindow, shell} = require('electron')
 
 const { createWindow } = require('../window')
+const { getServerUrl } = require('../utils')
+
+const url = require('url')
+const fetch = require('node-fetch')
+const semver = require('semver')
 
 module.exports = function (commandId, args = {}) {
   switch (commandId) {
@@ -22,6 +27,19 @@ module.exports = function (commandId, args = {}) {
     case 'configServerUrl':
       BrowserWindow.getFocusedWindow().webContents.send('config-serverurl')
       break
+    case 'checkVersion':
+      return fetch(url.resolve(getServerUrl(), '/status')).then(response => {
+        var browserWindows = BrowserWindow.getAllWindows()
+        if (!semver.satisfies(response.headers.get('HackMD-Version'), '>= 0.5.1')) {
+          browserWindows.forEach(browserWindow => {
+            browserWindow.send('unsupported-version')
+          })
+        } else {
+          browserWindows.forEach(browserWindow => {
+            browserWindow.send('supported-version')
+          })
+        }
+      }).catch(err => console.log(err))
     default:
       break
   }

package.json

@@ -37,6 +37,8 @@
   "dependencies": {
     "electron-config": "^0.2.1",
     "jquery": "^3.2.1",
+    "node-fetch": "^1.6.3",
+    "semver": "^5.3.0",
     "validate.js": "^0.11.1"
   }
 }

renderer.js

@@ -43,9 +43,9 @@ window.onload = () => {
 
     // set dark theme if in home page
     if (webview.getURL().split('?')[0].split('#')[0].match(/https?:\/\/hackmd.io\/$/)) {
-      document.querySelector('navbar').className = 'dark'
+      $('navbar').addClass('dark')
     } else {
-      document.querySelector('navbar').className = ''
+      $('navbar').remove('dark')
     }
 
     /* bind control buttons event */
@@ -134,6 +134,13 @@ window.onload = () => {
     $('#serverurl-config-modal.modal').modal()
   })
 
+  ipcRenderer.on('unsupported-version', () => {
+    $('navbar').addClass('unsupported')
+  })
+
+  ipcRenderer.on('supported-version', () => {
+    $('navbar').removeClass('unsupported')
+  })
   $('#serverurl-config-modal.modal #submit-serverurl').click(function () {
     let serverurl = $('#serverurl-config-modal.modal input[type="text"]').val()
 
@@ -144,6 +151,7 @@ window.onload = () => {
     if (!errors) {
       config.set('serverurl', serverurl)
       webview.loadURL(serverurl)
+      ipcClient('checkVersion')
       $('#serverurl-config-modal.modal').modal('hide')
     } else {
       // show me some error
@@ -155,4 +163,6 @@ window.onload = () => {
   webview.addEventListener('new-window', (event) => {
     ipcClient('createWindow', { url: `file://${path.join(__dirname, `index.html?target=${event.url}`)}` })
   })
+
+  ipcClient('checkVersion')
 }

yarn.lock

@@ -611,6 +611,12 @@ electron-macos-sign@~1.4.0:
     minimist "^1.2.0"
     plist "^2.0.1"
 
+encoding@^0.1.11:
+  version "0.1.12"
+  resolved "https://registry.yarnpkg.com/encoding/-/encoding-0.1.12.tgz#538b66f3ee62cd1ab51ec323829d1f9480c74beb"
+  dependencies:
+    iconv-lite "~0.4.13"
+
 env-paths@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/env-paths/-/env-paths-0.3.1.tgz#c30ccfcbc30c890943dc08a85582517ef00da463"
@@ -1092,6 +1098,10 @@ humanize-plus@^1.8.1:
   version "1.8.2"
   resolved "https://registry.yarnpkg.com/humanize-plus/-/humanize-plus-1.8.2.tgz#a65b34459ad6367adbb3707a82a3c9f916167030"
 
+iconv-lite@~0.4.13:
+  version "0.4.15"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.15.tgz#fe265a218ac6a57cfe854927e9d04c19825eddeb"
+
 ignore@^3.0.9, ignore@^3.2.0:
   version "3.2.6"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.2.6.tgz#26e8da0644be0bb4cb39516f6c79f0e0f4ffe48c"
@@ -1244,7 +1254,7 @@ is-retry-allowed@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-retry-allowed/-/is-retry-allowed-1.1.0.tgz#11a060568b67339444033d0125a61a20d564fb34"
 
-is-stream@^1.0.0:
+is-stream@^1.0.0, is-stream@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
 
@@ -1505,6 +1515,13 @@ node-emoji@^1.5.1:
   dependencies:
     string.prototype.codepointat "^0.2.0"
 
+node-fetch@^1.6.3:
+  version "1.6.3"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.6.3.tgz#dc234edd6489982d58e8f0db4f695029abcd8c04"
+  dependencies:
+    encoding "^0.1.11"
+    is-stream "^1.0.1"
+
 node-status-codes@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/node-status-codes/-/node-status-codes-1.0.0.tgz#5ae5541d024645d32a58fcddc9ceecea7ae3ac2f"
@@ -1777,18 +1794,7 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
-readable-stream@^2.0.0, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@~2.0.0:
-  version "2.0.6"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
-  dependencies:
-    core-util-is "~1.0.0"
-    inherits "~2.0.1"
-    isarray "~1.0.0"
-    process-nextick-args "~1.0.6"
-    string_decoder "~0.10.x"
-    util-deprecate "~1.0.1"
-
-readable-stream@^2.2.2:
+readable-stream@^2.0.0, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.2.2:
   version "2.2.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.2.6.tgz#8b43aed76e71483938d12a8d46c6cf1a00b1f816"
   dependencies:
@@ -1809,6 +1815,17 @@ readable-stream@~1.1.9:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
+readable-stream@~2.0.0:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.1"
+    isarray "~1.0.0"
+    process-nextick-args "~1.0.6"
+    string_decoder "~0.10.x"
+    util-deprecate "~1.0.1"
+
 readline2@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/readline2/-/readline2-1.0.1.tgz#41059608ffc154757b715d9989d199ffbf372e35"