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import { config } from "https://deno.land/x/dotenv/mod.ts";import { encode } from "https://deno.land/std/encoding/base64.ts";// We use Mailgun to handle the fiddly bits about sending email, since I'm not// particularly keen on running an SMTP server just yet.
// Enquees an email to be sent via the Mailgun APIexport function deliver({ to, text, from, subject }) {  // The mailgun API expects messages to come in as web forms  // See:  // https://documentation.mailgun.com/en/latest/api-sending.html#sending  // See: https://developer.mozilla.org/en-US/docs/Web/API/FormData  const formData = new FormData();  formData.append("to", to);  formData.append("from", from);  formData.append("subject", subject);  formData.append("text", text);
  // POST to the the Mailgun API's Messages endpoint  // See: https://documentation.mailgun.com/en/latest/api-sending.html#sending  return request(endpointUrl("/messages"), {    method: "POST",    body: formData,  });}
// URL for a given resource in the Mailgun APIconst endpointUrl = (resource) => `${baseUrl}${resource}`;
// The Mailgun API uses the sender domain as the base for making API requests// See: https://documentation.mailgun.com/en/latest/api-intro.html#base-urlconst baseUrl = `https://api.mailgun.net/v3/${config()["MAILGUN_DOMAIN"]}`;
// Makes an authenticated request with the Mailgun credentials// See https://developer.mozilla.org/en-US/docs/Web/API/Fetch_APIfunction request(url, options = {}, headers = {}) {  // HTTP Basic Credentials are Base 64 Encoded  // See: https://en.wikipedia.org/wiki/Basic_access_authentication  const credentials = encode(`api:${config()["MAILGUN_API_KEY"]}`);
  // Call the JavaScripts built in Fetch API with the credentials and other  // provided headers and options.  return fetch(url, {    headers: {      "Authorization": `Basic ${credentials}`,      // Merge in the provided headers      ...headers,    },    // Merge in the provided options    ...options,  });}