feat: complete day 4

day4/cronjobs/email_sending.js

@@ -0,0 +1,66 @@
+const db = require("../models");
+const nodemailer = require("nodemailer");
+require("dotenv").config();
+
+(async () => {
+  try {
+    const EmailQueue = db.email_queue;
+    const Email = db.email;
+    const User = db.user;
+    const today = new Date();
+    today.setHours(0, 0, 0, 0);
+    const tomorrow = new Date(today);
+    tomorrow.setDate(today.getDate() + 1);
+
+    // 1. Get all email_queue entries for today and not sent
+    const queues = await EmailQueue.findAll({
+      where: {
+        send_at: { $gte: today, $lt: tomorrow },
+        status: 0,
+      },
+    });
+    if (!queues.length) {
+      console.log("No emails to send today.");
+      return;
+    }
+
+    // 2. Setup nodemailer with Mailtrap
+    const transporter = nodemailer.createTransport({
+      host: process.env.MAILTRAP_HOST,
+      port: process.env.MAILTRAP_PORT,
+      auth: {
+        user: process.env.MAILTRAP_USER,
+        pass: process.env.MAILTRAP_PASS,
+      },
+    });
+
+    let sentCount = 0;
+    for (const queue of queues) {
+      // 3. Get user and email
+      const user = await User.findByPk(queue.user_id);
+      const email = await Email.findByPk(queue.email_id);
+      if (!user || !email) continue;
+      // 4. Replace template
+      let body = email.body
+        .replace(/\{\{\{NAME\}\}\}/g, user.name)
+        .replace(/\{\{\{EMAIL\}\}\}/g, user.email);
+      // 5. Send email
+      await transporter.sendMail({
+        from: "noreply@example.com",
+        to: user.email,
+        subject: email.subject,
+        html: body,
+      });
+      // 6. Mark as sent
+      queue.status = 1;
+      queue.updated_at = new Date();
+      await queue.save();
+      sentCount++;
+    }
+    console.log(`Sent ${sentCount} emails.`);
+    process.exit(0);
+  } catch (err) {
+    console.error("Error in email_sending cronjob:", err);
+    process.exit(1);
+  }
+})();