produce warning if frontend version does not match backend version

package.json

 {
-  "name": "Fractalis",
+  "name": "fractalis",
   "description": "The front-end component of the Fractalis visual analytics project.",
-  "version": "0.1.0",
+  "version": "0.1.2",
   "author": "Sascha Herzinger <sascha.herzinger@uni.lu>",
   "license": "Apache-2.0",
   "bugs": {
-    "url": "https://git-r3lab.uni.lu/sascha.herzinger/fractal.js",
+    "url": "https://git-r3lab.uni.lu/Fractalis/fractal.js/issues",
     "email": "sascha.herzinger@uni.lu"
   },
   "repository": {
     "type": "git",
-    "url": "https://git-r3lab.uni.lu/sascha.herzinger/fractal.js"
+    "url": "https://git-r3lab.uni.lu/Fractalis/fractal.js"
   },
   "scripts": {
     "build": "./node_modules/webpack/bin/webpack.js --config webpack.config.js --env production",

src/main.js

+import {version} from '../package.json'
 import store from './store/store'
 import RequestManager from './services/request-manager'
 import ChartManager from './services/chart-manager'
@@ -8,6 +9,16 @@ class FractalJS {
     store.dispatch('setRequestManager', requestManager)
     store.dispatch('updateData')
     this._chartManager = new ChartManager()
+    this._versionCheck()
+  }
+
+  async _versionCheck () {
+    const rv = await store.state.requestManager.getVersion()
+    const backendVersion = rv.data.version
+    if (backendVersion !== version) {
+      console.warn(`WARNING: The Fractalis backend is version ${backendVersion},
+      but the frontend is version ${version}. This might or might not cause issues.`)
+    }
   }
 
   // noinspection JSMethodCanBeStatic

src/services/request-manager.js

@@ -113,4 +113,12 @@ export default class {
     store.dispatch('unsetTask', {taskID})
     return this._axios.delete(`/analytics/${taskID}`)
   }
+
+  /**
+   * Submits a GET request to retrieve the fractalis backend version.
+   * @returns {AxiosPromise} An ES6 promise.
+   */
+  getVersion () {
+    return this._axios.get('/misc/version')
+  }
 }