Added translations using i18next

ref #5

src/PdfCreator.ts

@@ -1,8 +1,11 @@
 import fs from "fs";
+import Handlebars from 'handlebars';
+import i18next from "i18next";
+import Backend from 'i18next-fs-backend';
 import path from 'path';
 import puppeteer from "puppeteer";
 import { Runner } from './models/Runner';
-import Handlebars = require('handlebars');
+
 /**
  * This class is responsible for all things pdf creation.
  * This uses the html templates from src/templates.
@@ -12,12 +15,25 @@ export class PdfCreator {
     private browser;
 
     constructor() {
+        i18next
+            .use(Backend)
+            .init({
+                fallbackLng: 'en',
+                lng: 'en',
+                backend: {
+                    loadPath: path.join(__dirname, '/locales/{{lng}}.json')
+                }
+            });
+        Handlebars.registerHelper('__',
+            function (str) {
+                return i18next.t(str).toString();
+            }
+        );
         puppeteer.launch({ headless: true }).then(browser => {
             this.browser = browser;
         });
     }
 
-    //TODO: Accept the runner class
     public async generateSponsoringContract(runner: Runner): Promise<any> {
         const template_source = fs.readFileSync(`${this.templateDir}/sponsoring_contract.html`, 'utf8');
         const template = Handlebars.compile(template_source);