feat(mail): add smtp email delivery

lib/mail/config.ts

@@ -0,0 +1,109 @@
+import { mkdir, readFile, writeFile } from "fs/promises";
+import path from "path";
+import { configDirectory } from "@/lib/runtime/config";
+import type { SmtpSettings } from "@/lib/admin/types";
+import type { PublicSmtpSettings } from "./types";
+
+const smtpConfigFile = path.join(configDirectory, "smtp.json");
+
+const defaultSmtpSettings: SmtpSettings = {
+  host: "",
+  port: "587",
+  username: "",
+  password: "",
+  security: "starttls",
+  fromAddress: "",
+  replyToAddress: "",
+  recipientAddress: "",
+  bccAddress: "",
+};
+
+function text(value: FormDataEntryValue | null) {
+  return typeof value === "string" ? value.trim() : "";
+}
+
+function normalizeSecurity(value: string): SmtpSettings["security"] {
+  if (value === "tls" || value === "none") return value;
+  return "starttls";
+}
+
+async function ensureConfigDirectory() {
+  await mkdir(configDirectory, { recursive: true });
+}
+
+export async function getSmtpSettings(): Promise<SmtpSettings> {
+  await ensureConfigDirectory();
+  try {
+    const file = await readFile(smtpConfigFile, "utf8");
+    return { ...defaultSmtpSettings, ...JSON.parse(file) as SmtpSettings };
+  } catch {
+    return defaultSmtpSettings;
+  }
+}
+
+export function toPublicSmtpSettings(settings: SmtpSettings): PublicSmtpSettings {
+  return {
+    host: settings.host,
+    port: settings.port,
+    username: settings.username,
+    security: settings.security,
+    fromAddress: settings.fromAddress,
+    replyToAddress: settings.replyToAddress,
+    recipientAddress: settings.recipientAddress,
+    bccAddress: settings.bccAddress,
+    lastTestAt: settings.lastTestAt,
+    lastTestStatus: settings.lastTestStatus,
+    lastError: settings.lastError,
+    hasPassword: Boolean(settings.password),
+  };
+}
+
+export function isSmtpConfigured(settings: SmtpSettings) {
+  return Boolean(
+    settings.host &&
+    settings.port &&
+    settings.username &&
+    settings.password &&
+    settings.fromAddress &&
+    settings.recipientAddress,
+  );
+}
+
+export async function saveSmtpSettings(form: FormData) {
+  const current = await getSmtpSettings();
+  const nextPassword = text(form.get("password"));
+  const settings: SmtpSettings = {
+    ...current,
+    host: text(form.get("host")),
+    port: text(form.get("port")) || "587",
+    username: text(form.get("username")),
+    password: nextPassword || current.password || "",
+    security: normalizeSecurity(text(form.get("security"))),
+    fromAddress: text(form.get("fromAddress")),
+    replyToAddress: text(form.get("replyToAddress")),
+    recipientAddress: text(form.get("recipientAddress")),
+    bccAddress: text(form.get("bccAddress")),
+  };
+
+  await ensureConfigDirectory();
+  await writeFile(smtpConfigFile, `${JSON.stringify(settings, null, 2)}\n`, "utf8");
+  return settings;
+}
+
+export async function updateSmtpTestStatus(status: Pick<SmtpSettings, "lastTestAt" | "lastTestStatus" | "lastError">) {
+  const current = await getSmtpSettings();
+  const settings: SmtpSettings = { ...current, ...status };
+  await ensureConfigDirectory();
+  await writeFile(smtpConfigFile, `${JSON.stringify(settings, null, 2)}\n`, "utf8");
+  return settings;
+}
+
+export async function updateSmtpDeliveryStatus(status: Pick<SmtpSettings, "lastDeliveryAt" | "lastDeliveryStatus" | "lastError">) {
+  const current = await getSmtpSettings();
+  const settings: SmtpSettings = { ...current, ...status };
+  await ensureConfigDirectory();
+  await writeFile(smtpConfigFile, `${JSON.stringify(settings, null, 2)}\n`, "utf8");
+  return settings;
+}
+
+export { smtpConfigFile };

lib/mail/smtp.ts

@@ -0,0 +1,100 @@
+import nodemailer from "nodemailer";
+import type SMTPTransport from "nodemailer/lib/smtp-transport";
+import type { SmtpSettings } from "@/lib/admin/types";
+import { getSmtpSettings, isSmtpConfigured, updateSmtpDeliveryStatus, updateSmtpTestStatus } from "./config";
+import { contactTemplate, repairTemplate, testTemplate } from "./templates";
+import type { ContactMailInput, MailSendResult, RepairMailInput } from "./types";
+
+function sanitizeMailError(error: unknown) {
+  const message = error instanceof Error ? error.message : "Unbekannter SMTP-Fehler";
+  return message
+    .replace(/AUTH PLAIN\s+\S+/gi, "AUTH PLAIN [redacted]")
+    .replace(/AUTH LOGIN\s+\S+/gi, "AUTH LOGIN [redacted]")
+    .replace(/password[=:]\S+/gi, "password=[redacted]")
+    .slice(0, 500);
+}
+
+function createTransport(settings: SmtpSettings) {
+  const secure = settings.security === "tls";
+  const requireTLS = settings.security === "starttls";
+  const options: SMTPTransport.Options = {
+    host: settings.host,
+    port: Number(settings.port),
+    secure,
+    requireTLS,
+    auth: {
+      user: settings.username,
+      pass: settings.password,
+    },
+  };
+
+  if (settings.security === "none") {
+    options.auth = settings.username && settings.password ? options.auth : undefined;
+    options.ignoreTLS = true;
+  }
+
+  return nodemailer.createTransport(options);
+}
+
+async function sendConfiguredMail(input: {
+  subject: string;
+  text: string;
+  html: string;
+  replyTo?: string;
+}): Promise<MailSendResult> {
+  const settings = await getSmtpSettings();
+  if (!isSmtpConfigured(settings)) return { ok: false, error: "SMTP nicht konfiguriert." };
+
+  try {
+    const transport = createTransport(settings);
+    await transport.sendMail({
+      from: settings.fromAddress,
+      to: settings.recipientAddress,
+      bcc: settings.bccAddress || undefined,
+      replyTo: input.replyTo || settings.replyToAddress || undefined,
+      subject: input.subject,
+      text: input.text,
+      html: input.html,
+    });
+    return { ok: true };
+  } catch (error) {
+    return { ok: false, error: sanitizeMailError(error) };
+  }
+}
+
+export async function sendTestMail() {
+  const template = testTemplate();
+  const result = await sendConfiguredMail(template);
+  await updateSmtpTestStatus({
+    lastTestAt: new Date().toISOString(),
+    lastTestStatus: result.ok ? "success" : "error",
+    lastError: result.ok ? "" : result.error,
+  });
+  return result;
+}
+
+export async function sendContactInquiryMail(input: ContactMailInput) {
+  const template = contactTemplate(input);
+  const result = await sendConfiguredMail({ ...template, replyTo: input.email });
+  if (result.error !== "SMTP nicht konfiguriert.") {
+    await updateSmtpDeliveryStatus({
+      lastDeliveryAt: new Date().toISOString(),
+      lastDeliveryStatus: result.ok ? "success" : "error",
+      lastError: result.ok ? "" : result.error,
+    });
+  }
+  return result;
+}
+
+export async function sendRepairInquiryMail(input: RepairMailInput) {
+  const template = repairTemplate(input);
+  const result = await sendConfiguredMail({ ...template, replyTo: input.email });
+  if (result.error !== "SMTP nicht konfiguriert.") {
+    await updateSmtpDeliveryStatus({
+      lastDeliveryAt: new Date().toISOString(),
+      lastDeliveryStatus: result.ok ? "success" : "error",
+      lastError: result.ok ? "" : result.error,
+    });
+  }
+  return result;
+}

lib/mail/templates.ts

@@ -0,0 +1,74 @@
+import type { ContactMailInput, RepairMailInput } from "./types";
+
+function escapeHtml(value?: string) {
+  return (value ?? "")
+    .replace(/&/g, "&")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&#039;");
+}
+
+function rows(entries: Array<[string, string | undefined]>) {
+  return entries
+    .filter(([, value]) => value)
+    .map(([label, value]) => `<tr><th align="left" style="padding:6px 12px;border-bottom:1px solid #d9dee6;">${escapeHtml(label)}</th><td style="padding:6px 12px;border-bottom:1px solid #d9dee6;">${escapeHtml(value)}</td></tr>`)
+    .join("");
+}
+
+function textRows(entries: Array<[string, string | undefined]>) {
+  return entries
+    .filter(([, value]) => value)
+    .map(([label, value]) => `${label}: ${value}`)
+    .join("\n");
+}
+
+export function contactTemplate(input: ContactMailInput) {
+  const subject = `Kontaktanfrage: ${input.subject ?? "Funktechnik Schubert"}`;
+  const entries: Array<[string, string | undefined]> = [
+    ["Datum", new Date(input.createdAt).toLocaleString("de-DE")],
+    ["Name", input.name],
+    ["E-Mail", input.email],
+    ["Telefon", input.phone],
+    ["Betreff", input.subject],
+    ["Nachricht", input.message],
+  ];
+
+  return {
+    subject,
+    text: `Neue Kontaktanfrage\n\n${textRows(entries)}`,
+    html: `<h1>Neue Kontaktanfrage</h1><table cellspacing="0" cellpadding="0">${rows(entries)}</table>`,
+  };
+}
+
+export function repairTemplate(input: RepairMailInput) {
+  const subject = `Reparaturanfrage: ${input.manufacturer} ${input.model}`;
+  const entries: Array<[string, string | undefined]> = [
+    ["Datum", new Date(input.createdAt).toLocaleString("de-DE")],
+    ["Name", input.name],
+    ["E-Mail", input.email],
+    ["Telefon", input.phone],
+    ["Hersteller", input.manufacturer],
+    ["Modell", input.model],
+    ["Geräteart", input.deviceType],
+    ["Seriennummer", input.serialNumber],
+    ["Fehlerbeschreibung", input.description],
+    ["Zubehör", input.accessories],
+    ["Gerät geöffnet?", input.opened],
+    ["Vorarbeiten", input.previousWork],
+  ];
+
+  return {
+    subject,
+    text: `Neue Reparaturanfrage\n\n${textRows(entries)}`,
+    html: `<h1>Neue Reparaturanfrage</h1><table cellspacing="0" cellpadding="0">${rows(entries)}</table>`,
+  };
+}
+
+export function testTemplate() {
+  return {
+    subject: "SMTP Testmail - Funktechnik Schubert",
+    text: "Diese Testmail wurde aus der Funktechnik Schubert Website-Administration gesendet.",
+    html: "<h1>SMTP Testmail</h1><p>Diese Testmail wurde aus der Funktechnik Schubert Website-Administration gesendet.</p>",
+  };
+}

lib/mail/types.ts

@@ -0,0 +1,13 @@
+import type { ContactInquiry, RepairInquiry, SmtpSettings } from "@/lib/admin/types";
+
+export type PublicSmtpSettings = Omit<SmtpSettings, "password"> & {
+  hasPassword: boolean;
+};
+
+export type MailSendResult = {
+  ok: boolean;
+  error?: string;
+};
+
+export type ContactMailInput = ContactInquiry;
+export type RepairMailInput = RepairInquiry;