Moved pdf creatior initialization to new function

ref #5

src/PdfCreator.ts

@@ -20,7 +20,13 @@ export class PdfCreator {
      * Initializes i18n(ext), Handlebars and puppeteer.
      */
     constructor() {
-        i18next
+        this.init().then(() => {
+            return this;
+        })
+    }
+
+    public async init() {
+        await i18next
             .use(Backend)
             .init({
                 fallbackLng: 'en',
@@ -29,14 +35,12 @@ export class PdfCreator {
                     loadPath: path.join(__dirname, '/locales/{{lng}}.json')
                 }
             });
-        Handlebars.registerHelper('__',
+        await Handlebars.registerHelper('__',
             function (str) {
                 return i18next.t(str, PdfCreator.interpolations).toString();
             }
         );
-        puppeteer.launch({ headless: true }).then(browser => {
-            this.browser = browser;
-        });
+        this.browser = await puppeteer.launch({ headless: true });
     }
 
     /**
@@ -49,7 +53,6 @@ export class PdfCreator {
         const template_source = fs.readFileSync(`${this.templateDir}/sponsoring_contract.html`, 'utf8');
         const template = Handlebars.compile(template_source);
         const result = template({ runners })
-        console.log(template)
         return await this.renderPdf(result, { format: "A5", landscape: true });
     }
 
@@ -59,7 +62,7 @@ export class PdfCreator {
      * @param options Puppeteer PDF option (eg: {format: "A4"})
      */
     public async renderPdf(html: string, options): Promise<any> {
-        const page = await this.browser.newPage();
+        let page = await this.browser.newPage();
         await page.setContent(html);
         const pdf = await page.pdf(options);
         await page.close();

src/controllers/PdfController.ts

@@ -10,10 +10,7 @@ import { PdfCreator } from '../PdfCreator';
  */
 @JsonController()
 export class PdfController {
-    private pdf: PdfCreator;
-    constructor() {
-        this.pdf = new PdfCreator();
-    }
+    private pdf: PdfCreator = new PdfCreator();
 
     @Post('/contracts')
     @OpenAPI({ description: "Generate Sponsoring contract pdfs from runner objects.<br>You can choose your prefered locale by passing the 'locale' query-param." })