feat: DH-HIS Web Giao Ban (Node.js & Express) complete codebase

db.js

@@ -0,0 +1,57 @@
+const { Pool } = require('pg');
+require('dotenv').config();
+
+const pools = {};
+
+function getPool(dbName) {
+  const database = dbName || process.env.PG_DATABASE || 'an_omon_full_04052026';
+  if (!pools[database]) {
+    pools[database] = new Pool({
+      host: process.env.PG_HOST || '192.168.50.79',
+      port: parseInt(process.env.PG_PORT || '5437', 10),
+      user: process.env.PG_USER || 'postgres',
+      password: process.env.PG_PASSWORD || '123',
+      database: database,
+      max: 10,
+      idleTimeoutMillis: 30000,
+      connectionTimeoutMillis: 5000,
+      statement_timeout: 15000, // 15s timeout to prevent hanging queries
+    });
+
+    pools[database].on('error', (err) => {
+      console.error(`Unexpected error on idle client for db ${database}`, err);
+    });
+  }
+  return pools[database];
+}
+
+async function query(sql, params = [], dbName = null) {
+  const pool = getPool(dbName);
+  const start = Date.now();
+  const res = await pool.query(sql, params);
+  const duration = Date.now() - start;
+  // console.log(`[SQL ${duration}ms] executed on ${dbName || 'default'}`);
+  return res;
+}
+
+// Clean RTF string helper
+function cleanRtf(text) {
+  if (!text) return '';
+  if (!text.includes('{\\rtf')) return text.trim();
+  // Strip RTF control codes
+  let clean = text
+    .replace(/\\par[d]?/g, '\n')
+    .replace(/\\u([0-9]{3,5})\?/g, (match, dec) => String.fromCharCode(dec))
+    .replace(/\\'([0-9a-fA-F]{2})/g, (match, hex) => String.fromCharCode(parseInt(hex, 16)))
+    .replace(/\{[^{}]*\}/g, '')
+    .replace(/\\[a-zA-Z0-9\-]+/g, '')
+    .replace(/[\{\}]/g, '')
+    .trim();
+  return clean;
+}
+
+module.exports = {
+  getPool,
+  query,
+  cleanRtf,
+};