Initial commit (unpacked platform)

packages/database/src/client.ts

@@ -0,0 +1,50 @@
+import pg from "pg";
+import { drizzle } from "drizzle-orm/node-postgres";
+import * as schema from "./schema/index.js";
+
+export type Database = ReturnType<typeof createDatabase>["db"];
+
+let sharedPool: pg.Pool | undefined;
+
+/**
+ * Skapar en databasklient. API och worker delar mönster men äger varsin pool.
+ * DATABASE_URL pekar på appens separata databas med egen minimalprivilegie-användare
+ * (minsta möjliga privilegier, spec §52).
+ */
+export function createDatabase(connectionString?: string) {
+  const url =
+    connectionString ??
+    process.env.DATABASE_URL ??
+    "postgres://app_user:app_dev_password@localhost:5432/app";
+
+  const pool = new pg.Pool({
+    connectionString: url,
+    max: Number(process.env.DATABASE_POOL_MAX ?? 10),
+    idleTimeoutMillis: 30_000,
+    connectionTimeoutMillis: 10_000,
+  });
+
+  const db = drizzle(pool, { schema, casing: "snake_case" });
+  return { db, pool };
+}
+
+/** Singleton för processer som bara behöver en anslutning. */
+export function getDatabase() {
+  if (!sharedPool) {
+    const { db, pool } = createDatabase();
+    sharedPool = pool;
+    sharedDb = db;
+  }
+  return sharedDb!;
+}
+let sharedDb: Database | undefined;
+
+export async function closeDatabase(): Promise<void> {
+  if (sharedPool) {
+    await sharedPool.end();
+    sharedPool = undefined;
+    sharedDb = undefined;
+  }
+}
+
+export { schema };