feat: infra 패키지 추가 및 PostgreSQL, Redis 커넥터 구현

packages/infra/src/postgres.ts

@@ -0,0 +1,42 @@
+import { PrismaClient, type PrismaClientOptions } from '@prisma/client';
+
+export interface PostgresConfig {
+    url: string;
+    log?: PrismaClientOptions['log'];
+}
+
+export interface PostgresConnector {
+    readonly prisma: PrismaClient;
+    connect(): Promise<void>;
+    disconnect(): Promise<void>;
+}
+
+export const resolvePostgresConfigFromEnv = (
+    env: NodeJS.ProcessEnv = process.env
+): PostgresConfig => {
+    const url = env.DATABASE_URL ?? '';
+    if (!url) {
+        throw new Error('DATABASE_URL is required to create a Postgres client.');
+    }
+
+    return { url };
+};
+
+export const createPostgresConnector = (
+    config: PostgresConfig
+): PostgresConnector => {
+    const prisma = new PrismaClient({
+        datasources: {
+            db: {
+                url: config.url,
+            },
+        },
+        log: config.log,
+    });
+
+    return {
+        prisma,
+        connect: () => prisma.$connect(),
+        disconnect: () => prisma.$disconnect(),
+    };
+};