135 lines
3.1 KiB
TypeScript
135 lines
3.1 KiB
TypeScript
import {CalendarEvent} from "../calendarClient";
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import {serverConfig} from "../serverConfig";
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import nodemailer from 'nodemailer';
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export default abstract class EventMail {
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calEvent: CalendarEvent;
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uid: string;
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/**
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* An EventMail always consists of a CalendarEvent
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* that stores the very basic data of the event (like date, title etc).
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* It also needs the UID of the stored booking in our database.
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*
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* @param calEvent
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* @param uid
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*/
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constructor(calEvent: CalendarEvent, uid: string) {
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this.calEvent = calEvent;
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this.uid = uid;
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}
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/**
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* Returns the email text as HTML representation.
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*
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* @protected
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*/
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protected abstract getHtmlRepresentation(): string;
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/**
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* Returns the email text in a plain text representation
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* by stripping off the HTML tags.
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*
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* @protected
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*/
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protected getPlainTextRepresentation(): string {
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return this.stripHtml(this.getHtmlRepresentation());
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}
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/**
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* Strips off all HTML tags and leaves plain text.
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*
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* @param html
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* @protected
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*/
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protected stripHtml(html: string): string {
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return html
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.replace('<br />', "\n")
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.replace(/<[^>]+>/g, '');
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}
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/**
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* Returns the payload object for the nodemailer.
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* @protected
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*/
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protected abstract getNodeMailerPayload(): Object;
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/**
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* Sends the email to the event attendant and returns a Promise.
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*/
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public sendEmail(): Promise<any> {
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return new Promise((resolve, reject) => nodemailer.createTransport(this.getMailerOptions().transport).sendMail(
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this.getNodeMailerPayload(),
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(error, info) => {
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if (error) {
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this.printNodeMailerError(error);
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reject(new Error(error));
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} else {
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resolve(info);
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}
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}));
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}
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/**
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* Gathers the required provider information from the config.
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*
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* @protected
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*/
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protected getMailerOptions(): any {
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return {
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transport: serverConfig.transport,
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from: serverConfig.from,
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};
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}
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/**
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* Can be used to include additional HTML or plain text
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* content into the mail body. Leave it to an empty
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* string if not desired.
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*
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* @protected
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*/
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protected getAdditionalBody(): string {
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return "";
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}
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/**
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* Prints out the desired information when an error
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* occured while sending the mail.
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* @param error
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* @protected
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*/
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protected abstract printNodeMailerError(error: string): void;
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/**
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* Returns a link to reschedule the given booking.
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*
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* @protected
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*/
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protected getRescheduleLink(): string {
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return process.env.BASE_URL + '/reschedule/' + this.uid;
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}
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/**
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* Returns a link to cancel the given booking.
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*
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* @protected
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*/
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protected getCancelLink(): string {
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return process.env.BASE_URL + '/cancel/' + this.uid;
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}
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/**
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* Defines a footer that will be appended to the email.
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* @protected
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*/
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protected getAdditionalFooter(): string {
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return `
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<br/>
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Need to change this event?<br />
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Cancel: <a href="${this.getCancelLink()}">${this.getCancelLink()}</a><br />
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Reschedule: <a href="${this.getRescheduleLink()}">${this.getRescheduleLink()}</a>
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`;
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}
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} |