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import express from "express";
import nodemailer from "nodemailer";
import cors from "cors";
import { createClient } from "@supabase/supabase-js";
import dotenv from "dotenv";
import { Client, Receiver } from "@upstash/qstash";
// Load environment variables from .env file
dotenv.config();
const app = express();
// Middleware
app.use(cors());
app.use(express.json({ limit: '50mb' }));
app.use(express.urlencoded({ limit: '50mb', extended: true }));
// Supabase client - reads from your .env file
const supabaseUrl = process.env.VITE_SUPABASE_URL;
const supabaseKey = process.env.VITE_SUPABASE_ANON_KEY;
const GEMINI_API_KEY = process.env.GEMINI_API_KEY;
if (!supabaseUrl || !supabaseKey) {
console.error("ERROR: Missing VITE_SUPABASE_URL or VITE_SUPABASE_ANON_KEY in .env file");
process.exit(1);
}
console.log("Supabase URL:", supabaseUrl);
const supabase = createClient(supabaseUrl, supabaseKey);
// QStash client for publishing messages
const qstashClient = new Client({
token: process.env.QSTASH_TOKEN,
baseUrl: process.env.QSTASH_URL, // For local dev: http://127.0.0.1:8080
});
// QStash receiver for verifying webhook signatures
const qstashReceiver = new Receiver({
currentSigningKey: process.env.QSTASH_CURRENT_SIGNING_KEY,
nextSigningKey: process.env.QSTASH_NEXT_SIGNING_KEY,
});
// Email transporter configuration
const transporter = nodemailer.createTransport({
service: "gmail",
auth: {
user: process.env.EMAIL_USER,
pass: process.env.EMAIL_PASS,
},
});
// Generate HTML email template for blog
const generateBlogEmailHTML = (blog, unsubscribeLink = "#") => {
return `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>${blog.title}</title>
</head>
<body style="margin: 0; padding: 0; background-color: #f4f4f5; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;">
<table role="presentation" style="width: 100%; border-collapse: collapse;">
<tr>
<td style="padding: 40px 20px;">
<table role="presentation" style="max-width: 600px; margin: 0 auto; background-color: #ffffff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);">
<!-- Header -->
<tr>
<td style="background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%); padding: 30px 40px; text-align: center;">
<h1 style="margin: 0; color: #ffffff; font-size: 24px; font-weight: 600;">CodeSapiens Blog</h1>
</td>
</tr>
<!-- Cover Image -->
${blog.cover_image ? `
<tr>
<td style="padding: 0;">
<img src="${blog.cover_image}" alt="${blog.title}" style="width: 100%; height: auto; display: block;">
</td>
</tr>
` : ''}
<!-- Content -->
<tr>
<td style="padding: 40px;">
<h2 style="margin: 0 0 16px 0; color: #1f2937; font-size: 28px; font-weight: 700; line-height: 1.3;">
${blog.title}
</h2>
${blog.excerpt ? `
<p style="margin: 0 0 24px 0; color: #6b7280; font-size: 16px; line-height: 1.6; font-style: italic;">
${blog.excerpt}
</p>
` : ''}
<div style="color: #374151; font-size: 16px; line-height: 1.8;">
${blog.content}
</div>
<!-- CTA Button -->
<table role="presentation" style="margin: 32px 0;">
<tr>
<td style="background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%); border-radius: 8px;">
<a href="https://codesapiens.in/blog/${blog.slug || ''}" style="display: inline-block; padding: 14px 32px; color: #ffffff; text-decoration: none; font-weight: 600; font-size: 16px;">
Read Full Article →
</a>
</td>
</tr>
</table>
</td>
</tr>
<!-- Footer -->
<tr>
<td style="background-color: #f9fafb; padding: 24px 40px; text-align: center; border-top: 1px solid #e5e7eb;">
<p style="margin: 0 0 8px 0; color: #6b7280; font-size: 14px;">
You're receiving this because you're a member of CodeSapiens.
</p>
<p style="margin: 0; color: #9ca3af; font-size: 12px;">
© ${new Date().getFullYear()} CodeSapiens. All rights reserved.
</p>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
`;
};
// ============================================
// API ENDPOINTS
// ============================================
// Health check
app.get("/", (req, res) => {
res.json({ status: "ok", message: "CodeSapiens Email API is running" });
});
// Gemini Wrapper Endpoint
app.post("/api/analyze-resume", async (req, res) => {
try {
const { resumeText, jobDescription, analysisMode } = req.body;
if (!GEMINI_API_KEY) {
console.error("GEMINI_API_KEY is not set in environment variables");
return res.status(500).json({ error: "Server configuration error: Gemini API key missing" });
}
if (!resumeText) {
return res.status(400).json({ error: "Missing resume text" });
}
let prompt = '';
if (analysisMode === 'jd') {
prompt = `
You are an expert ATS (Applicant Tracking System) and Career Coach.
Compare the following Resume text against the Job Description (JD).
Resume Text:
${resumeText}
Job Description:
${jobDescription}
Provide a detailed analysis in strictly raw JSON format (no markdown code blocks, no explanation text).
Ensure all strings are properly escaped.
The JSON structure must be:
{
"matchPercentage": number (0-100),
"summary": "string (brief overview of fit)",
"strengths": "markdown string (bullet points)",
"weaknesses": "markdown string (missing skills/experience)",
"improvements": "markdown string (concrete suggestions to improve the resume for this JD)"
}
`;
} else {
prompt = `
You are an expert Career Coach and Resume Reviewer.
Analyze the following Resume text to provide general feedback on how to improve it for a professional career.
Resume Text:
${resumeText}
Provide a detailed analysis in strictly raw JSON format (no markdown code blocks, no explanation text).
Ensure all strings are properly escaped.
The JSON structure must be:
{
"matchPercentage": number (0-100, representing overall resume quality score),
"summary": "string (brief summary of the candidate's profile)",
"strengths": "markdown string (strong points of the resume)",
"weaknesses": "markdown string (formatting issues, missing sections, unclear descriptions)",
"improvements": "markdown string (actionable tips to make the resume stand out generally)"
}
`;
}
const GEMINI_API_URL = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent';
const response = await fetch(`${GEMINI_API_URL}?key=${GEMINI_API_KEY}`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ contents: [{ parts: [{ text: prompt }] }] })
});
if (!response.ok) {
throw new Error(`AI Analysis failed: ${response.statusText}`);
}
const result = await response.json();
return res.json(result);
} catch (error) {
console.error("Error in /api/analyze-resume:", error);
res.status(500).json({ error: error.message || "Internal Server Error" });
}
});
// Legacy email endpoint (keep for backward compatibility)
app.get("/send-email", async (req, res) => {
try {
await transporter.sendMail({
from: "suryasunrise261@gmail.com",
to: "suryasuperman261@gmail.com",
subject: "Hello!",
text: "This is a test message.",
});
res.send("Email sent!");
} catch (error) {
res.send("Error: " + error.message);
}
});
// Get all students
app.get("/api/students", async (req, res) => {
try {
const { data, error } = await supabase
.from("users")
.select("uid, display_name, email, college, role, avatar")
.eq("role", "student")
.order("display_name", { ascending: true });
if (error) throw error;
res.json({ success: true, students: data || [] });
} catch (error) {
console.error("Error fetching students:", error);
res.status(500).json({ success: false, error: error.message });
}
});
// Get all users (including non-students)
app.get("/api/users", async (req, res) => {
try {
const { data, error } = await supabase
.from("users")
.select("uid, display_name, email, college, role, avatar")
.order("display_name", { ascending: true });
if (error) throw error;
res.json({ success: true, users: data || [] });
} catch (error) {
console.error("Error fetching users:", error);
res.status(500).json({ success: false, error: error.message });
}
});
// Send blog email to selected recipients (via QStash in production, direct in dev)
app.post("/api/send-blog-email", async (req, res) => {
try {
const { emails, blog } = req.body;
if (!emails || !Array.isArray(emails) || emails.length === 0) {
return res.status(400).json({ success: false, error: "No recipients provided" });
}
if (!blog || !blog.title || !blog.content) {
return res.status(400).json({ success: false, error: "Invalid blog data" });
}
const isLocalDev = !process.env.VERCEL_URL && !process.env.BASE_URL;
if (isLocalDev) {
// LOCAL DEV: Send emails directly (QStash can't reach localhost)
const htmlContent = generateBlogEmailHTML(blog);
let successCount = 0;
let failedEmails = [];
for (const email of emails) {
try {
await transporter.sendMail({
from: '"CodeSapiens Blog" <suryasunrise261@gmail.com>',
to: email,
subject: `📚 New Blog: ${blog.title}`,
html: htmlContent,
});
successCount++;
console.log(`✅ Email sent to ${email}`);
} catch (emailError) {
console.error(`Failed to send to ${email}:`, emailError.message);
failedEmails.push(email);
}
}
return res.json({
success: true,
message: `Email sent to ${successCount} of ${emails.length} recipients (local mode)`,
successCount,
failedCount: failedEmails.length,
});
}
// PRODUCTION: Queue to QStash
const baseUrl = process.env.VERCEL_URL
? `https://${process.env.VERCEL_URL}`
: process.env.BASE_URL;
// Debug: log blog object to see available fields
console.log("📝 Blog object received:", JSON.stringify({ id: blog.id, title: blog.title, keys: Object.keys(blog) }));
// Since we already have the full blog, send it directly (it's small enough per email)
const queuePromises = emails.map(email =>
qstashClient.publishJSON({
url: `${baseUrl}/api/qstash-send-email`,
body: { email, blog: { id: blog.id, title: blog.title, content: blog.content, excerpt: blog.excerpt, cover_image: blog.cover_image, slug: blog.slug } },
retries: 3,
})
);
await Promise.all(queuePromises);
res.json({
success: true,
message: `Queued ${emails.length} emails for delivery`,
queuedCount: emails.length,
});
} catch (error) {
console.error("Error sending blog emails:", error);
res.status(500).json({ success: false, error: error.message });
}
});
// Send blog email to all students (via QStash in production, direct in dev)
app.post("/api/send-blog-email-all", async (req, res) => {
try {
const { blog } = req.body;
if (!blog || !blog.title || !blog.content) {
return res.status(400).json({ success: false, error: "Invalid blog data" });
}
// Fetch all student emails
const { data: students, error: fetchError } = await supabase
.from("users")
.select("email")
.eq("role", "student");
if (fetchError) throw fetchError;
if (!students || students.length === 0) {
return res.status(400).json({ success: false, error: "No students found" });
}
const emails = students.map(s => s.email).filter(Boolean);
const isLocalDev = !process.env.VERCEL_URL && !process.env.BASE_URL;
if (isLocalDev) {
// LOCAL DEV: Send emails directly (QStash can't reach localhost)
const htmlContent = generateBlogEmailHTML(blog);
let successCount = 0;
let failedEmails = [];
for (const email of emails) {
try {
await transporter.sendMail({
from: '"CodeSapiens Blog" <suryasunrise261@gmail.com>',
to: email,
subject: `📚 New Blog: ${blog.title}`,
html: htmlContent,
});
successCount++;
console.log(`✅ Email sent to ${email}`);
} catch (emailError) {
console.error(`Failed to send to ${email}:`, emailError.message);
failedEmails.push(email);
}
}
return res.json({
success: true,
message: `Email sent to ${successCount} of ${emails.length} students (local mode)`,
successCount,
totalStudents: students.length,
failedCount: failedEmails.length,
});
}
// PRODUCTION: Queue to QStash
const baseUrl = process.env.VERCEL_URL
? `https://${process.env.VERCEL_URL}`
: process.env.BASE_URL;
const queuePromises = emails.map(email =>
qstashClient.publishJSON({
url: `${baseUrl}/api/qstash-send-email`,
body: { email, blog: { id: blog.id, title: blog.title, content: blog.content, excerpt: blog.excerpt, cover_image: blog.cover_image, slug: blog.slug } },
retries: 3,
})
);
await Promise.all(queuePromises);
res.json({
success: true,
message: `Queued ${emails.length} emails for delivery to all students`,
queuedCount: emails.length,
totalStudents: students.length,
});
} catch (error) {
console.error("Error sending blog email to all:", error);
res.status(500).json({ success: false, error: error.message });
}
});
// Test email endpoint
app.post("/api/test-email", async (req, res) => {
try {
const { email } = req.body;
if (!email) {
return res.status(400).json({ success: false, error: "Email is required" });
}
await transporter.sendMail({
from: '"CodeSapiens" <suryasunrise261@gmail.com>',
to: email,
subject: "Test Email from CodeSapiens",
html: `
<div style="font-family: Arial, sans-serif; padding: 20px;">
<h2>🎉 Email Configuration Working!</h2>
<p>This is a test email from the CodeSapiens Blog Email System.</p>
<p>If you received this, the email system is configured correctly.</p>
</div>
`,
});
res.json({ success: true, message: `Test email sent to ${email}` });
} catch (error) {
console.error("Test email error:", error);
res.status(500).json({ success: false, error: error.message });
}
});
// ============================================
// QSTASH WEBHOOK - Called by Upstash to send emails
// ============================================
app.post("/api/qstash-send-email", async (req, res) => {
try {
// Verify the request is from QStash (signature verification)
const signature = req.headers["upstash-signature"];
const body = JSON.stringify(req.body);
if (process.env.NODE_ENV === "production" && signature) {
const isValid = await qstashReceiver.verify({
signature,
body,
});
if (!isValid) {
console.error("Invalid QStash signature");
return res.status(401).json({ error: "Invalid signature" });
}
}
const { email, blogId, blog: blogFromBody } = req.body;
// Debug: log what we received
console.log("📨 QStash webhook received:", JSON.stringify(req.body, null, 2));
if (!email) {
console.log("❌ Missing email");
return res.status(400).json({ error: "Missing email" });
}
let blog = blogFromBody;
// If blog not provided directly, fetch from Supabase using blogId
if (!blog && blogId) {
const { data: fetchedBlog, error: blogError } = await supabase
.from("blogs")
.select("*")
.eq("id", blogId)
.single();
if (blogError || !fetchedBlog) {
console.error("Failed to fetch blog:", blogError?.message);
return res.status(404).json({ error: "Blog not found" });
}
blog = fetchedBlog;
}
if (!blog || !blog.title) {
console.log("❌ Missing blog data");
return res.status(400).json({ error: "Missing blog data" });
}
const htmlContent = generateBlogEmailHTML(blog);
await transporter.sendMail({
from: '"CodeSapiens Blog" <suryasunrise261@gmail.com>',
to: email,
subject: `📚 New Blog: ${blog.title}`,
html: htmlContent,
});
console.log(`✅ Email sent to ${email}`);
res.json({ success: true, message: `Email sent to ${email}` });
} catch (error) {
console.error(`❌ Failed to send email:`, error.message);
// Return 500 so QStash will retry
res.status(500).json({ success: false, error: error.message });
}
});
const PORT = process.env.PORT || 3001;
app.listen(PORT, () => console.log(`Server running on port ${PORT}`));