Nunjucks: distinguish application version from core version

src/Application.ts

@@ -7,8 +7,8 @@ import ApplicationComponent from "./ApplicationComponent";
 import Controller from "./Controller";
 import MysqlConnectionManager from "./db/MysqlConnectionManager";
 import Migration from "./db/Migration";
-import TemplateError = lib.TemplateError;
 import {Type} from "./Utils";
+import TemplateError = lib.TemplateError;
 
 export default abstract class Application {
     private readonly version: string;
@@ -34,6 +34,7 @@ export default abstract class Application {
             this.webSocketListeners[path] = thing;
             Logger.info(`Added websocket listener on ${path}`);
         } else {
+            thing.setApp(this);
             this.components.push(thing);
         }
     }
@@ -156,4 +157,8 @@ export default abstract class Application {
     public isReady(): boolean {
         return this.ready;
     }
+
+    public getVersion(): string {
+        return this.version;
+    }
 }

src/ApplicationComponent.ts

@@ -1,9 +1,11 @@
 import {Express, Router} from "express";
 import Logger from "./Logger";
 import {sleep} from "./Utils";
+import Application from "./Application";
 
 export default abstract class ApplicationComponent<T> {
     private val?: T;
+    protected app?: Application;
 
     public abstract async start(app: Express, router: Router): Promise<void>;
 
@@ -18,6 +20,10 @@ export default abstract class ApplicationComponent<T> {
         return this.val;
     }
 
+    public setApp(app: Application) {
+        this.app = app;
+    }
+
     protected async prepare(name: string, prepare: () => Promise<void>): Promise<void> {
         let err;
         do {

src/components/NunjucksComponent.ts

@@ -18,7 +18,8 @@ export default class NunjucksComponent extends ApplicationComponent<void> {
                 if (path === null) throw new ServerError(`Route ${route} not found.`);
                 return path;
             })
-            .addGlobal('app_version', require('../package.json').version)
+            .addGlobal('app_version', this.app!.getVersion())
+            .addGlobal('core_version', require('../package.json').version)
             .addFilter('hex', (v: number) => {
                 return v.toString(16);
             });