feat: unified portal server, single database migration & railway configuration

WebGIS_SPBU_dan_LayerControl/server.js

@@ -11,22 +11,38 @@ app.use(bodyParser.json());
 app.use(express.static(__dirname));
 
 // Create MySQL connection
-const db = mysql.createConnection({
-    host: process.env.DB_HOST || 'localhost',
-    user: process.env.DB_USER || 'root',
-    password: process.env.DB_PASSWORD || '',
-    database: process.env.DB_NAME || 'spbu_gis',
-    port: process.env.DB_PORT || 3306
-});
+let db;
+function handleDisconnect() {
+    const connectionString = process.env.DATABASE_URL || process.env.MYSQL_URL || process.env.MYSQL_PRIVATE_URL;
+    db = connectionString
+        ? mysql.createConnection(connectionString)
+        : mysql.createConnection({
+            host: process.env.DB_HOST || 'localhost',
+            user: process.env.DB_USER || 'root',
+            password: process.env.DB_PASSWORD || '',
+            database: process.env.DB_NAME || 'spbu_gis',
+            port: process.env.DB_PORT || 3306
+        });
 
+    db.connect(err => {
+        if (err) {
+            console.error('Database connection failed: ' + err.stack);
+            setTimeout(handleDisconnect, 2000);
+        } else {
+            console.log('Connected to MySQL database.');
+        }
+    });
 
-db.connect(err => {
-    if (err) {
-        console.error('Database connection failed: ' + err.stack);
-        return;
-    }
-    console.log('Connected to MySQL database.');
-});
+    db.on('error', err => {
+        console.error('Database error:', err);
+        if (err.code === 'PROTOCOL_CONNECTION_LOST') {
+            handleDisconnect();
+        } else {
+            throw err;
+        }
+    });
+}
+handleDisconnect();
 
 // GET route to fetch all SPBU locations
 app.get('/api/spbus', (req, res) => {