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src/db/provider.js

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+import { MssqlProvider } from 'libdashstore/providers/mssql';
+import { BetterSqlite3Provider } from 'libdashstore/providers/better-sqlite3';
+import env from '../config/env.js';
+
+function getMssqlConfig() {
+    const { server, database, user, password, port, encrypt, trustServerCertificate } = env.mssql;
+
+    if (!server || !database || !user || !password) {
+        throw new Error('MSSQL is not configured (MSSQL_SERVER, MSSQL_DATABASE, MSSQL_USER, MSSQL_PASSWORD required)');
+    }
+
+    return {
+        server,
+        database,
+        user,
+        password,
+        port,
+        storageDir: env.storageDir,
+        pool: {
+            max: 10,
+            min: 0,
+            idleTimeoutMillis: 30_000,
+        },
+        options: {
+            encrypt,
+            trustServerCertificate,
+        },
+    };
+}
+
+/**
+ * Creates the configured (uninitialized) libdashstore provider from `.env`.
+ * @returns {MssqlProvider | BetterSqlite3Provider}
+ */
+export function createProvider() {
+    if (env.dbProvider === 'sqlite' || env.dbProvider === 'better-sqlite3') {
+        return new BetterSqlite3Provider(env.sqlite);
+    }
+    return new MssqlProvider(getMssqlConfig(), { storageDir: env.storageDir });
+}
+