From d08cda9d2275ab1207f2943616a6ebd00a4abb49 Mon Sep 17 00:00:00 2001
From: Thibault Pouch <thibault.pouch@epitech.eu>
Date: Tue, 3 Mar 2026 10:21:29 +0100
Subject: [PATCH] feat: enhance logging in PrismaClient for better query,
 warning, and error visibility

---
 nest-backend/src/app.ts        | 93 +++++++++++++++++++++++++++++++++-
 nest-backend/src/lib/prisma.ts |  8 ++-
 2 files changed, 99 insertions(+), 2 deletions(-)

diff --git a/nest-backend/src/app.ts b/nest-backend/src/app.ts
index 5f68658..9cca0aa 100644
--- a/nest-backend/src/app.ts
+++ b/nest-backend/src/app.ts
@@ -10,6 +10,97 @@ import teamRouter from './routes/team.js';
 
 const app = express();
 
+// ── Logger ─────────────────────────────────────────────────────────────────────
+const R       = '\x1b[0m';
+const BOLD    = '\x1b[1m';
+const DIM     = '\x1b[2m';
+const RED     = '\x1b[31m';
+const GREEN   = '\x1b[32m';
+const YELLOW  = '\x1b[33m';
+const BLUE    = '\x1b[34m';
+const MAGENTA = '\x1b[35m';
+const CYAN    = '\x1b[36m';
+const WHITE   = '\x1b[37m';
+const BG_RED  = '\x1b[41m';
+const BG_GREEN = '\x1b[42m';
+const BG_YELLOW = '\x1b[43m';
+const BG_BLUE = '\x1b[44m';
+const BG_MAGENTA = '\x1b[45m';
+const BG_CYAN = '\x1b[46m';
+
+const METHOD_STYLE: Record<string, string> = {
+  GET:    `${BG_BLUE}${WHITE}${BOLD}`,
+  POST:   `${BG_GREEN}${WHITE}${BOLD}`,
+  PUT:    `${BG_YELLOW}${WHITE}${BOLD}`,
+  PATCH:  `${BG_MAGENTA}${WHITE}${BOLD}`,
+  DELETE: `${BG_RED}${WHITE}${BOLD}`,
+};
+
+function methodBadge(method: string): string {
+  const style = METHOD_STYLE[method] ?? `${BG_CYAN}${WHITE}${BOLD}`;
+  return `${style} ${method.padEnd(6)} ${R}`;
+}
+
+function statusBadge(code: number): string {
+  if (code < 300) return `${BG_GREEN}${WHITE}${BOLD} ${code} ${R}`;
+  if (code < 400) return `${BG_YELLOW}${WHITE}${BOLD} ${code} ${R}`;
+  return `${BG_RED}${WHITE}${BOLD} ${code} ${R}`;
+}
+
+function prettyJson(value: unknown): string {
+  return JSON.stringify(value, (k, v) => k === 'password' ? '***' : v, 2)
+    .split('\n')
+    .map((line, i) => i === 0 ? line : `  ${DIM}    ${line}${R}`)
+    .join('\n');
+}
+
+const SEP = `${DIM}${'─'.repeat(60)}${R}`;
+
+app.use((req, res, next) => {
+  const start = Date.now();
+  const ts = new Date().toISOString().replace('T', ' ').slice(0, 23);
+
+  // Skip health check noise
+  if (req.originalUrl === '/api/health') { next(); return; }
+
+  const originalJson = res.json.bind(res);
+  let resBody: unknown;
+  res.json = (body) => { resBody = body; return originalJson(body); };
+
+  res.on('finish', () => {
+    const ms     = Date.now() - start;
+    const userId = req.user?.userId ? `${CYAN}${req.user.userId.slice(0, 8)}…${R}` : `${DIM}anon${R}`;
+    const role   = req.user?.role   ? `${MAGENTA}${req.user.role}${R}` : `${DIM}-${R}`;
+
+    const hasBody = ['POST', 'PUT', 'PATCH'].includes(req.method)
+      && req.body && Object.keys(req.body).length > 0;
+
+    const lines: string[] = [
+      SEP,
+      `${DIM}${ts}${R}  ${methodBadge(req.method)} ${BOLD}${req.originalUrl}${R}`,
+      `  ${DIM}┌ user   ${R} ${userId} ${DIM}role:${R} ${role}`,
+      `  ${DIM}└ status ${R} ${statusBadge(res.statusCode)} ${DIM}${ms}ms${R}`,
+    ];
+
+    if (hasBody) {
+      lines.push(`  ${GREEN}↑ REQUEST BODY${R}`);
+      lines.push(`  ${DIM}    ${prettyJson(req.body)}${R}`);
+    }
+
+    if (res.statusCode >= 400 && resBody) {
+      lines.push(`  ${RED}↓ ERROR RESPONSE${R}`);
+      lines.push(`  ${DIM}    ${prettyJson(resBody)}${R}`);
+    } else if (res.statusCode < 300 && resBody && req.method !== 'GET') {
+      lines.push(`  ${GREEN}↓ RESPONSE BODY${R}`);
+      lines.push(`  ${DIM}    ${prettyJson(resBody)}${R}`);
+    }
+
+    console.log(lines.join('\n'));
+  });
+
+  next();
+});
+
 app.use(cors({
   origin: [
     'http://localhost:5173', // nest-front dev
@@ -37,7 +128,7 @@ app.use((_req, res) => res.status(404).json({ error: 'Not found' }));
 
 // Global error handler
 app.use((err: Error, _req: express.Request, res: express.Response, _next: express.NextFunction) => {
-  console.error(err);
+  console.error(`${BG_RED}${WHITE}${BOLD} UNHANDLED ERROR ${R}`, err);
   res.status(500).json({ error: 'Internal server error' });
 });
 
diff --git a/nest-backend/src/lib/prisma.ts b/nest-backend/src/lib/prisma.ts
index 4e54f7a..3bc967f 100644
--- a/nest-backend/src/lib/prisma.ts
+++ b/nest-backend/src/lib/prisma.ts
@@ -1,5 +1,11 @@
 import { PrismaClient } from '@prisma/client';
 
-const prisma = new PrismaClient();
+const prisma = new PrismaClient({
+  log: [
+    { emit: 'stdout', level: 'query' },
+    { emit: 'stdout', level: 'warn' },
+    { emit: 'stdout', level: 'error' },
+  ],
+});
 
 export default prisma;