2021-03-10 22:33:43 +01:00
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#!/usr/bin/env node
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2021-03-10 11:30:08 +01:00
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import path from "path";
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2020-05-05 08:12:57 +02:00
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import express from "express";
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import { SMTPServer } from "smtp-server";
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import mailparser from "mailparser";
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2021-03-10 11:30:08 +01:00
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import fs from "fs-extra";
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2020-05-05 08:12:57 +02:00
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import cryptoRandomString from "crypto-random-string";
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2021-03-10 12:05:04 +01:00
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import { html, HTML } from "@leafac/html";
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import { css, process as processCSS } from "@leafac/css";
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2021-03-10 12:35:48 +01:00
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import { sql, Database } from "@leafac/sqlite";
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import databaseMigrate from "@leafac/sqlite-migration";
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2021-03-11 12:19:23 +01:00
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import javascript from "tagged-template-noop";
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2020-05-05 08:12:57 +02:00
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2021-03-10 11:30:08 +01:00
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const VERSION = require("../package.json").version;
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2020-05-05 08:12:57 +02:00
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2021-03-10 11:30:08 +01:00
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export default function killTheNewsletter(
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rootDirectory: string
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): { webApplication: express.Express; emailApplication: SMTPServer } {
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const webApplication = express();
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webApplication.set("url", "http://localhost:4000");
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webApplication.set("email port", 2525);
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webApplication.set("email host", "localhost");
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2021-03-10 12:05:04 +01:00
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webApplication.set("administrator", "mailto:kill-the-newsletter@leafac.com");
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2021-03-10 22:33:43 +01:00
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fs.ensureDirSync(rootDirectory);
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2021-03-10 12:35:48 +01:00
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const database = new Database(
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path.join(rootDirectory, "kill-the-newsletter.db")
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);
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databaseMigrate(database, [
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sql`
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CREATE TABLE "feeds" (
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"id" INTEGER PRIMARY KEY AUTOINCREMENT,
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"createdAt" TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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"updatedAt" TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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"reference" TEXT NOT NULL UNIQUE,
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"title" TEXT NOT NULL
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);
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CREATE TABLE "entries" (
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"id" INTEGER PRIMARY KEY AUTOINCREMENT,
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"createdAt" TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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"reference" TEXT NOT NULL UNIQUE,
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"feed" INTEGER NOT NULL REFERENCES "feeds",
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"title" TEXT NOT NULL,
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"author" TEXT NOT NULL,
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"content" TEXT NOT NULL
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);
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2021-03-11 23:12:37 +01:00
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CREATE TRIGGER "feedsUpdatedAt"
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AFTER INSERT ON "entries"
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BEGIN
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UPDATE "feeds" SET "updatedAt" = datetime('now') WHERE "id" = "NEW"."feed";
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END;
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2021-03-10 12:35:48 +01:00
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`,
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]);
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2021-03-10 12:05:04 +01:00
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webApplication.use(express.static(path.join(__dirname, "../public")));
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webApplication.use(express.urlencoded({ extended: true }));
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const logo = fs.readFileSync(path.join(__dirname, "../public/logo.svg"));
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function layout(body: HTML): HTML {
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return processCSS(html`
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta
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name="viewport"
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content="width=device-width, initial-scale=1.0"
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/>
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2021-03-11 11:08:51 +01:00
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<meta name="generator" content="Kill the Newsletter!/${VERSION}" />
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<meta
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name="description"
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content="Convert email newsletters into Atom feeds."
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/>
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<link
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rel="icon"
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type="image/png"
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sizes="32x32"
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href="${webApplication.get("url")}/favicon-32x32.png"
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/>
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<link
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rel="icon"
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type="image/png"
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sizes="16x16"
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href="${webApplication.get("url")}/favicon-16x16.png"
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/>
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<link
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rel="icon"
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type="image/x-icon"
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href="${webApplication.get("url")}/favicon.ico"
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/>
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2021-03-10 12:05:04 +01:00
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<title>Kill the Newsletter!</title>
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</head>
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<body
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style="${css`
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@at-root {
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body {
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font-size: 14px;
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font-family: --apple-system, BlinkMacSystemFont, "Segoe UI",
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Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
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"Helvetica Neue", sans-serif;
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line-height: 1.5;
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2021-03-11 11:33:19 +01:00
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max-width: 450px;
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2021-03-10 12:05:04 +01:00
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padding: 0 1em;
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margin: 1em auto;
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text-align: center;
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}
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code {
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font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo,
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monospace;
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}
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2021-03-11 09:49:25 +01:00
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a,
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button {
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2021-03-10 12:05:04 +01:00
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color: inherit;
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text-decoration: none;
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transition: color 0.2s;
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&:hover {
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color: #58a6ff;
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}
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}
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h1 {
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font-size: 1.5em;
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}
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footer {
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2021-03-11 09:49:25 +01:00
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font-size: 0.857em;
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2021-03-10 12:05:04 +01:00
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}
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input,
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button {
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font-family: --apple-system, BlinkMacSystemFont, "Segoe UI",
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Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
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"Helvetica Neue", sans-serif;
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font-size: 1em;
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line-height: 1.5;
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color: inherit;
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background-color: transparent;
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margin: 0;
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outline: none;
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}
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input {
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box-sizing: border-box;
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width: 100%;
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2021-03-11 09:49:25 +01:00
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padding: 0.2em 1em;
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border: 1px solid darkgray;
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border-radius: 10px;
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box-shadow: inset 0px 1px #ffffff22, 0px 1px #00000022;
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2021-03-10 12:05:04 +01:00
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-webkit-appearance: none;
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transition: border-color 0.2s;
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&:focus {
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border-color: #58a6ff;
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}
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}
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button {
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2021-03-11 09:49:25 +01:00
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font-weight: bold;
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padding: 0;
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border: none;
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2021-03-10 12:05:04 +01:00
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cursor: pointer;
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}
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@media (prefers-color-scheme: light) {
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body {
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color: #000000d4;
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}
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}
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@media (prefers-color-scheme: dark) {
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body {
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color: #ffffffd4;
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background-color: #1e1e1e;
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}
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}
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}
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`}"
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>
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<header>
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<h1>
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<a href="${webApplication.get("url")}/">Kill the Newsletter!</a>
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</h1>
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<p>Convert email newsletters into Atom feeds</p>
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<p
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style="${css`
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@media (prefers-color-scheme: dark) {
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path {
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fill: #ffffffd4;
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}
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}
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`}"
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>
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$${logo}
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</p>
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</header>
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<main>$${body}</main>
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<footer>
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<p>
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By <a href="https://leafac.com">Leandro Facchinetti</a> ·
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<a href="https://github.com/leafac/kill-the-newsletter.com"
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>Source</a
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>
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·
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<a href="${webApplication.get("administrator")}"
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2021-03-11 11:33:19 +01:00
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>Report an issue</a
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2021-03-10 12:05:04 +01:00
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>
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</p>
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</footer>
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2021-03-11 12:19:23 +01:00
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<script>
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for (const copyable of document.querySelectorAll(".copyable"))
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copyable.insertAdjacentHTML(
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"afterend",
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$${"`"}
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$${html`
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<br />
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<button
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type="button"
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onclick="${javascript`
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(async () => {
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await navigator.clipboard.writeText("\${copyable.innerText}");
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const originalInnerText = this.innerText;
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this.innerText = "Copied";
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await new Promise(resolve => window.setTimeout(resolve, 500));
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this.innerText = originalInnerText;
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})();
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`}"
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>
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Copy
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</button>
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`}
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$${"`"}
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);
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</script>
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2021-03-10 12:05:04 +01:00
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</body>
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</html>
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`);
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}
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webApplication.get<{}, HTML, {}, {}, {}>("/", (req, res) => {
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res.send(
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layout(html`
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2021-03-11 11:04:09 +01:00
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<form method="post" action="${webApplication.get("url")}/">
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2021-03-10 12:05:04 +01:00
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<p>
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<input
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type="text"
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name="name"
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2021-03-10 12:35:48 +01:00
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placeholder="Newsletter name…"
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2021-03-10 12:05:04 +01:00
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maxlength="500"
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required
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autocomplete="off"
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autofocus
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/>
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</p>
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<p><button>Create inbox</button></p>
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</form>
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`)
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);
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});
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2021-03-10 11:30:08 +01:00
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2021-03-11 11:04:09 +01:00
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webApplication.post<{}, HTML, { name?: string }, {}, {}>("/", (req, res) => {
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if (
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2021-03-11 12:25:13 +01:00
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typeof req.body.name !== "string" ||
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2021-03-11 11:04:09 +01:00
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req.body.name.trim() === "" ||
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req.body.name.length > 500
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)
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return res.status(400).send(
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layout(
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html`<p>
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Error: Missing newsletter name.
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<a href="${webApplication.get("url")}/"
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><strong>Try again</strong></a
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>.
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</p>`
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)
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);
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const reference = newReference();
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const created = html`
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<p>
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Sign up for the newsletter with<br />
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<code class="copyable"
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>${reference}@${webApplication.get("email host")}</code
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>
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</p>
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|
|
|
|
<p>
|
|
|
|
|
|
Subscribe to the Atom feed at<br />
|
|
|
|
|
|
<code class="copyable"
|
|
|
|
|
|
>${webApplication.get("url")}/feeds/${reference}.xml</code
|
|
|
|
|
|
>
|
|
|
|
|
|
</p>
|
|
|
|
|
|
<p>
|
|
|
|
|
|
<strong>Don’t share these addresses.</strong><br />
|
|
|
|
|
|
They contain an identifier that other people could use to send you spam
|
|
|
|
|
|
and to control your newsletter subscriptions.
|
|
|
|
|
|
</p>
|
2021-03-11 11:33:19 +01:00
|
|
|
|
<p><strong>Enjoy your readings!</strong></p>
|
2021-03-11 11:04:09 +01:00
|
|
|
|
<p>
|
|
|
|
|
|
<a href="${webApplication.get("url")}/"
|
2021-03-11 11:33:19 +01:00
|
|
|
|
><strong>Create another inbox</strong></a
|
2021-03-11 11:04:09 +01:00
|
|
|
|
>
|
|
|
|
|
|
</p>
|
|
|
|
|
|
`;
|
|
|
|
|
|
|
|
|
|
|
|
const feedId = database.run(
|
|
|
|
|
|
sql`INSERT INTO "feeds" ("reference", "title") VALUES (${reference}, ${req.body.name})`
|
|
|
|
|
|
).lastInsertRowid;
|
|
|
|
|
|
database.run(
|
|
|
|
|
|
sql`
|
|
|
|
|
|
INSERT INTO "entries" ("reference", "feed", "title", "author", "content")
|
|
|
|
|
|
VALUES (${newReference()}, ${feedId}, ${`“${req.body.name}” inbox created`}, ${"Kill the Newsletter!"}, ${created})
|
|
|
|
|
|
`
|
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
res.send(
|
|
|
|
|
|
layout(html`
|
|
|
|
|
|
<p>
|
|
|
|
|
|
<strong>“${req.body.name}” inbox created</strong>
|
|
|
|
|
|
$${created}
|
|
|
|
|
|
</p>
|
|
|
|
|
|
`)
|
|
|
|
|
|
);
|
|
|
|
|
|
});
|
|
|
|
|
|
|
2021-03-11 22:52:54 +01:00
|
|
|
|
function renderFeed(feedReference: string): HTML | undefined {
|
|
|
|
|
|
const feed = database.get<{
|
|
|
|
|
|
id: number;
|
|
|
|
|
|
updatedAt: string;
|
|
|
|
|
|
title: string;
|
|
|
|
|
|
}>(
|
|
|
|
|
|
sql`SELECT "id", "updatedAt", "title" FROM "feeds" WHERE "reference" = ${feedReference}`
|
|
|
|
|
|
);
|
|
|
|
|
|
if (feed === undefined) return;
|
|
|
|
|
|
|
|
|
|
|
|
const entries = database.all<{
|
|
|
|
|
|
createdAt: string;
|
|
|
|
|
|
reference: string;
|
|
|
|
|
|
title: string;
|
|
|
|
|
|
author: string;
|
|
|
|
|
|
content: string;
|
|
|
|
|
|
}>(
|
|
|
|
|
|
sql`
|
|
|
|
|
|
SELECT "createdAt", "reference", "title", "author", "content"
|
|
|
|
|
|
FROM "entries"
|
|
|
|
|
|
WHERE "feed" = ${feed.id}
|
|
|
|
|
|
`
|
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
return html`
|
|
|
|
|
|
<?xml version="1.0" encoding="utf-8"?>
|
|
|
|
|
|
<feed xmlns="http://www.w3.org/2005/Atom">
|
|
|
|
|
|
<link
|
|
|
|
|
|
rel="self"
|
|
|
|
|
|
type="application/atom+xml"
|
|
|
|
|
|
href="${webApplication.get("url")}/feeds/${feedReference}.xml"
|
|
|
|
|
|
/>
|
|
|
|
|
|
<link
|
|
|
|
|
|
rel="alternate"
|
|
|
|
|
|
type="text/html"
|
|
|
|
|
|
href="${webApplication.get("url")}/"
|
|
|
|
|
|
/>
|
|
|
|
|
|
<id>urn:kill-the-newsletter:${feedReference}</id>
|
|
|
|
|
|
<title>${feed.title}</title>
|
|
|
|
|
|
<subtitle
|
|
|
|
|
|
>Kill the Newsletter! Inbox:
|
|
|
|
|
|
${feedReference}@${webApplication.get("email host")} →
|
|
|
|
|
|
${webApplication.get("url")}/feeds/${feedReference}.xml</subtitle
|
|
|
|
|
|
>
|
|
|
|
|
|
<updated>${new Date(feed.updatedAt).toISOString()}</updated>
|
|
|
|
|
|
<author><name>Kill the Newsletter!</name></author>
|
|
|
|
|
|
$${entries.map(
|
|
|
|
|
|
(entry) => html`
|
|
|
|
|
|
<entry>
|
|
|
|
|
|
<id>urn:kill-the-newsletter:${entry.reference}</id>
|
|
|
|
|
|
<title>${entry.title}</title>
|
|
|
|
|
|
<author><name>${entry.author}</name></author>
|
|
|
|
|
|
<updated>${new Date(entry.createdAt).toISOString()}</updated>
|
|
|
|
|
|
<link
|
|
|
|
|
|
rel="alternate"
|
|
|
|
|
|
type="text/html"
|
|
|
|
|
|
href="${webApplication.get(
|
|
|
|
|
|
"url"
|
|
|
|
|
|
)}/alternates/${entry.reference}.html"
|
|
|
|
|
|
/>
|
|
|
|
|
|
<content type="html">${entry.content}</content>
|
|
|
|
|
|
</entry>
|
|
|
|
|
|
`
|
|
|
|
|
|
)}
|
|
|
|
|
|
</feed>
|
|
|
|
|
|
`.trim();
|
|
|
|
|
|
}
|
|
|
|
|
|
|
2021-03-11 11:23:37 +01:00
|
|
|
|
webApplication.get<{ feedReference: string }, HTML, {}, {}, {}>(
|
|
|
|
|
|
"/feeds/:feedReference.xml",
|
|
|
|
|
|
(req, res, next) => {
|
2021-03-11 22:52:54 +01:00
|
|
|
|
const feed = renderFeed(req.params.feedReference);
|
2021-03-11 11:23:37 +01:00
|
|
|
|
if (feed === undefined) return next();
|
|
|
|
|
|
res
|
|
|
|
|
|
.contentType("application/atom+xml")
|
|
|
|
|
|
.header("X-Robots-Tag", "noindex")
|
2021-03-11 22:52:54 +01:00
|
|
|
|
.send(feed);
|
2021-03-11 11:23:37 +01:00
|
|
|
|
}
|
|
|
|
|
|
);
|
|
|
|
|
|
|
2021-03-11 11:29:05 +01:00
|
|
|
|
webApplication.get<{ entryReference: string }, HTML, {}, {}, {}>(
|
|
|
|
|
|
"/alternates/:entryReference.html",
|
|
|
|
|
|
(req, res, next) => {
|
|
|
|
|
|
const entry = database.get<{ content: string }>(
|
|
|
|
|
|
sql`SELECT "content" FROM "entries" WHERE "reference" = ${req.params.entryReference}`
|
|
|
|
|
|
);
|
|
|
|
|
|
if (entry === undefined) return next();
|
|
|
|
|
|
res.header("X-Robots-Tag", "noindex").send(entry.content);
|
|
|
|
|
|
}
|
|
|
|
|
|
);
|
|
|
|
|
|
|
2021-03-11 11:33:19 +01:00
|
|
|
|
webApplication.use((req, res) => {
|
|
|
|
|
|
res.send(
|
|
|
|
|
|
layout(html`
|
|
|
|
|
|
<p><strong>404 Not found</strong></p>
|
|
|
|
|
|
<p>
|
|
|
|
|
|
<a href="${webApplication.get("url")}/"
|
|
|
|
|
|
><strong>Create a new inbox</strong></a
|
|
|
|
|
|
>
|
|
|
|
|
|
</p>
|
|
|
|
|
|
`)
|
|
|
|
|
|
);
|
|
|
|
|
|
});
|
2021-03-11 11:29:05 +01:00
|
|
|
|
|
2021-03-11 12:22:54 +01:00
|
|
|
|
const emailApplication = new SMTPServer({
|
|
|
|
|
|
disabledCommands: ["AUTH", "STARTTLS"],
|
|
|
|
|
|
async onData(stream, session, callback) {
|
|
|
|
|
|
try {
|
2021-03-11 22:52:54 +01:00
|
|
|
|
const atHost = "@" + webApplication.get("email host");
|
2021-03-11 12:22:54 +01:00
|
|
|
|
const email = await mailparser.simpleParser(stream);
|
2021-03-11 22:52:54 +01:00
|
|
|
|
const from = email.from?.text ?? "";
|
|
|
|
|
|
const subject = email.subject ?? "";
|
|
|
|
|
|
const body =
|
2021-03-11 12:22:54 +01:00
|
|
|
|
typeof email.html === "string" ? email.html : email.textAsHtml ?? "";
|
|
|
|
|
|
for (const address of new Set(
|
2021-03-11 22:52:54 +01:00
|
|
|
|
session.envelope.rcptTo.map(
|
|
|
|
|
|
(smtpServerAddress) => smtpServerAddress.address
|
|
|
|
|
|
)
|
2021-03-11 12:22:54 +01:00
|
|
|
|
)) {
|
2021-03-11 22:52:54 +01:00
|
|
|
|
if (!address.endsWith(atHost)) continue;
|
|
|
|
|
|
const feedReference = address.slice(0, -atHost.length);
|
|
|
|
|
|
const feed = database.get<{ id: number }>(
|
|
|
|
|
|
sql`SELECT "id" FROM "feeds" WHERE "reference" = ${feedReference}`
|
2021-03-11 12:22:54 +01:00
|
|
|
|
);
|
2021-03-11 22:52:54 +01:00
|
|
|
|
if (feed === undefined) continue;
|
|
|
|
|
|
database.run(
|
|
|
|
|
|
sql`
|
|
|
|
|
|
INSERT INTO "entries" ("reference", "feed", "title", "author", "content")
|
|
|
|
|
|
VALUES (
|
|
|
|
|
|
${newReference()}, ${feed.id}, ${subject}, ${from}, ${body}
|
|
|
|
|
|
)
|
|
|
|
|
|
`
|
2021-03-11 12:22:54 +01:00
|
|
|
|
);
|
2021-03-11 23:12:37 +01:00
|
|
|
|
while (renderFeed(feedReference)!.length > 500_000)
|
2021-03-11 22:52:54 +01:00
|
|
|
|
database.run(
|
|
|
|
|
|
sql`DELETE FROM "entries" WHERE "feed" = ${feed.id} ORDER BY "createdAt" ASC LIMIT 1`
|
2021-03-11 12:22:54 +01:00
|
|
|
|
);
|
|
|
|
|
|
}
|
|
|
|
|
|
callback();
|
|
|
|
|
|
} catch (error) {
|
|
|
|
|
|
console.error(
|
|
|
|
|
|
`Failed to receive message: ‘${JSON.stringify(session, null, 2)}’`
|
|
|
|
|
|
);
|
|
|
|
|
|
console.error(error);
|
|
|
|
|
|
stream.resume();
|
|
|
|
|
|
callback(new Error("Failed to receive message. Please try again."));
|
|
|
|
|
|
}
|
|
|
|
|
|
},
|
|
|
|
|
|
});
|
2021-03-10 11:30:08 +01:00
|
|
|
|
|
2021-03-11 11:04:09 +01:00
|
|
|
|
function newReference(): string {
|
|
|
|
|
|
return cryptoRandomString({
|
|
|
|
|
|
length: 16,
|
|
|
|
|
|
characters: "abcdefghijklmnopqrstuvwxyz0123456789",
|
|
|
|
|
|
});
|
|
|
|
|
|
}
|
|
|
|
|
|
|
2021-03-10 11:30:08 +01:00
|
|
|
|
return { webApplication, emailApplication };
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
if (require.main === module) {
|
|
|
|
|
|
console.log(`Kill the Newsletter!/${VERSION}`);
|
|
|
|
|
|
const configurationFile = path.resolve(
|
|
|
|
|
|
process.argv[2] ?? path.join(process.cwd(), "configuration.js")
|
|
|
|
|
|
);
|
|
|
|
|
|
require(configurationFile)(require);
|
|
|
|
|
|
console.log(`Configuration file loaded from ‘${configurationFile}’.`);
|
|
|
|
|
|
}
|
