Mail to PDF - initial commit

3 years ago · 1b44541a1e
commit 1b44541a1e
2 changed files with 132 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -0,0 +1,12 @@
+# Mail-to-pdf
+
+Skrypt konwertujący pliki .eml do plików PDF, razem z załącznikami w postaci zdjęć.
+
+## Wymagania
+
+- zx
+- wkhtmltopdf
+
+## Sposób użycia
+
+`./mail-to-pdf.mjs plik.eml`
--- a/mail-to-pdf.mjs
+++ b/mail-to-pdf.mjs
@ -0,0 +1,120 @@
+#!/usr/bin/zx --quiet
+
+import { resolve, basename } from "path";
+
+const pwd = (await $`pwd`).stdout.replace("\n", "");
+
+$`echo $PWD`;
+
+const path = resolve(process.env.PWD, process.argv.slice(-1)[0]);
+
+const mail_body = (await $`mu view ${path} -o sexp`).stdout.replace(
+  /\\"/g,
+  '"'
+);
+
+let html = mail_body.match(/\<html\>.*\<\/html\>/gis)[0];
+
+const attachments = (await $`mu extract ${path}`).stdout;
+
+function getSimpleHeader(body, header_name) {
+  const regexp = new RegExp(`:${header_name} (.*)\n`);
+  return body.match(regexp)[1];
+}
+
+function formatAddress(sexp) {
+  sexp = sexp
+    .replace(/(^\(\(|\)\)$)/g, "")
+    .replace(/"? \. "/, " <")
+    .replace(/"$/, ">")
+    .replace(/^"/, "")
+    .replace(/^nil <(.*)>$/, "$1");
+  return sexp;
+}
+
+function escape(str) {
+  return str.replace(/</g, "&lt;");
+}
+
+const to_download = attachments
+  .split("\n")
+  .slice(1)
+  .filter((line) => line.includes("image"))
+  .map((line) => {
+    return {
+      filename: line.match(/\d+ (.*) image\//)[1],
+      mime: line.match(/image\/[^ ]+/)[0],
+    };
+  });
+
+const files = await Promise.all(
+  to_download.map(async ({ filename, mime }) => {
+    await $`mu extract --overwrite --target-dir=/tmp ${path} ${filename}`;
+    const base64 = (await $`base64 -w 0 < ${`/tmp/${filename}`}`).stdout;
+    return { filename, base64, mime };
+  })
+);
+
+const attachments_items = files
+  .map(
+    ({ filename, mime, base64 }) => /* HTML */ `<li>
+      ${filename}<img style="width: 100%" src="data:${mime};base64,${base64}" />
+    </li>`
+  )
+  .join("\n");
+
+html = html.replace(
+  /<\/body>/i,
+  /* HTML */ `<hr/><h3>Załączniki:</h3>
+    <ul>
+      ${attachments_items}
+    </ul></body>`
+);
+
+const subject = getSimpleHeader(mail_body, "subject").slice(1, -1); // slice to remove "
+const from = formatAddress(getSimpleHeader(mail_body, "from"));
+const to = formatAddress(getSimpleHeader(mail_body, "to"));
+const date = await formatDate(getSimpleHeader(mail_body, "date"));
+
+// console.log({ subject, from, to, date });
+
+html = html.replace(
+  /<body>/i,
+  `<body>` +
+    /* HTML */ `<h1>${subject}</h1>
+      <table>
+        <tr>
+          <th>Temat wiadomości:</th>
+          <td>${subject}</td>
+        </tr>
+        <tr>
+          <th>Wysłano:</th>
+          <td>${escape(date)}</td>
+        </tr>
+        <tr>
+          <th>Od:</th>
+          <td>${escape(from)}</td>
+        </tr>
+        <tr>
+          <th>Do:</th>
+          <td>${escape(to)}</td>
+        </tr>
+      </table>`
+);
+
+const output = (await $`mktemp --suffix=.html`).stdout.replace("\n", "");
+
+await fs.writeFile(output, html);
+await $`wkhtmltopdf ${output} ${`${basename(path)}.pdf`}`;
+// console.log(pwd + "output.html");
+// console.log(mail_body);
+
+async function formatDate(sexp) {
+  const parsed = (await $`emacsclient --eval ${`(decode-time '${sexp})`}`)
+    .stdout;
+  const [, minutes, hours, date, month, year] = parsed.split(" ");
+  return `${year}-${month.padStart(2, "0")}-${date} ${hours}:${minutes.padStart(
+    2,
+    "0"
+  )}`;
+}