Typescript migration: Major refactoring.

server/services/mailTemplateService.ts

@@ -0,0 +1,103 @@
+import _ from "lodash";
+import deepExtend from "deep-extend";
+import {readFileSync, promises as fs} from "graceful-fs";
+import moment from "moment";
+import {htmlToText} from "nodemailer-html-to-text";
+
+import {config} from "../config";
+import Logger from "../logger";
+import {editNodeUrl} from "../utils/urlBuilder";
+import {Transporter} from "nodemailer";
+import {MailData, Mail} from "../types";
+
+const templateBasePath = __dirname + '/../mailTemplates';
+const snippetsBasePath = templateBasePath + '/snippets';
+
+const templateFunctions: {[key: string]: (...data: MailData) => string} = {};
+
+function renderSnippet(this: any, name: string, data: MailData): string {
+    const snippetFile = snippetsBasePath + '/' + name + '.html';
+
+    return _.template(readFileSync(snippetFile).toString())(deepExtend(
+        {},
+        this, // parent data
+        data,
+        templateFunctions
+    ));
+}
+
+function snippet(name: string): ((this: any, data: MailData) => string) {
+    return function (this: any, data: MailData): string {
+        return renderSnippet.bind(this)(name, data);
+    };
+}
+
+function renderLink(href: string, text: string): string {
+    // noinspection HtmlUnknownTarget
+    return _.template(
+        '<a href="<%- href %>#" style="color: #E5287A;"><%- text %></a>'
+    )({
+        href: href,
+        text: text || href
+    });
+}
+
+function renderHR(): string {
+    return '<hr style="border-top: 1px solid #333333; border-left: 0; border-right: 0; border-bottom: 0;" />';
+}
+
+function formatDateTime(unix: number): string {
+    return moment.unix(unix).locale('de').local().format('DD.MM.YYYY HH:mm');
+}
+
+function formatFromNow(unix: number): string {
+    return moment.unix(unix).locale('de').fromNow();
+}
+
+templateFunctions.header = snippet('header');
+templateFunctions.footer = snippet('footer');
+
+templateFunctions.monitoringFooter = snippet('monitoring-footer');
+
+templateFunctions.snippet = renderSnippet;
+
+templateFunctions.link = renderLink;
+templateFunctions.hr = renderHR;
+
+templateFunctions.formatDateTime = formatDateTime;
+templateFunctions.formatFromNow = formatFromNow;
+
+export function configureTransporter (transporter: Transporter): void {
+    transporter.use('compile', htmlToText({
+        tables: ['.table']
+    }));
+}
+
+export async function render(mailOptions: Mail): Promise<{subject: string, body: string}> {
+    const templatePathPrefix = templateBasePath + '/' + mailOptions.email;
+
+    const subject = await fs.readFile(templatePathPrefix + '.subject.txt');
+    const body = await fs.readFile(templatePathPrefix + '.body.html');
+
+    const data = deepExtend(
+        {},
+        mailOptions.data,
+        {
+            community: config.client.community,
+            editNodeUrl: editNodeUrl()
+        },
+        templateFunctions
+    );
+
+    try {
+        return {
+            subject: _.trim(_.template(subject.toString())(data)),
+            body: _.template(body.toString())(data)
+        };
+    } catch (error) {
+        Logger
+            .tag('mail', 'template')
+            .error('Error rendering template for mail[' + mailOptions.id + ']:', error);
+        throw error;
+    }
+}