feat: MC Report System - MySQL + Express + Vanilla JS SPA

backend/mailer.js

@@ -0,0 +1,59 @@
+const nodemailer = require('nodemailer');
+const { getPool, query, getRow, getConfig } = require('./db');
+
+async function getSmtpConfig() {
+  try {
+    const rows = await query("SELECT k, v FROM settings WHERE k LIKE 'smtp_%'");
+    const cfg = {};
+    for (const r of rows) cfg[r.k] = r.v;
+    return {
+      host: cfg.smtp_host || '',
+      port: parseInt(cfg.smtp_port) || 587,
+      secure: cfg.smtp_secure === '1',
+      user: cfg.smtp_user || '',
+      pass: cfg.smtp_pass || '',
+      from: cfg.smtp_from || 'noreply@example.com',
+    };
+  } catch { return { host: '', port: 587, secure: false, user: '', pass: '', from: '' }; }
+}
+
+async function getSiteName() {
+  const row = await getRow("SELECT v FROM settings WHERE k = 'site_name'");
+  return row ? row.v : 'MC举报系统';
+}
+
+async function getSiteUrl() {
+  const row = await getRow("SELECT v FROM settings WHERE k = 'site_url'");
+  return row ? row.v : 'http://localhost:3100';
+}
+
+async function getTemplate(code) {
+  return getRow('SELECT * FROM email_templates WHERE code = ?', [code]);
+}
+
+function renderTemplate(template, vars) {
+  let { subject, body } = template;
+  for (const [k, v] of Object.entries(vars)) {
+    const re = new RegExp(`\\{\\{${k}\\}\\}`, 'g');
+    subject = subject.replace(re, v || '');
+    body = body.replace(re, v || '');
+  }
+  return { subject, body };
+}
+
+async function sendEmail(to, templateCode, vars) {
+  try {
+    const cfg = await getSmtpConfig();
+    if (!cfg.host || !cfg.user) { console.log('[Mailer] SMTP未配置'); return false; }
+    const template = await getTemplate(templateCode);
+    if (!template) { console.log('[Mailer] 模板不存在:', templateCode); return false; }
+    const allVars = { ...vars, site_name: await getSiteName(), site_url: await getSiteUrl() };
+    const { subject, body } = renderTemplate(template, allVars);
+
+    const transporter = nodemailer.createTransport({ host: cfg.host, port: cfg.port, secure: cfg.secure, auth: { user: cfg.user, pass: cfg.pass } });
+    await transporter.sendMail({ from: `"${await getSiteName()}" <${cfg.from}>`, to, subject, html: body });
+    return true;
+  } catch (err) { console.error('[Mailer]', err.message); return false; }
+}
+
+module.exports = { sendEmail, renderTemplate, getTemplate, getSmtpConfig, getSiteName, getSiteUrl };