init

src/services/postgres/postgres.service.ts

@@ -0,0 +1,59 @@
+import knex, { type Knex } from "knex";
+import type { PostgresDatabase, PostgresRole } from "./postgres.types.ts";
+import { Services } from "../../utils/service.ts";
+import { ConfigService } from "../config/config.ts";
+
+class PostgresService {
+  #db: Knex;
+
+  constructor(services: Services) {
+    const configService = services.get(ConfigService);
+    const config = configService.postgres;
+    this.#db = knex({
+      client: 'pg',
+      connection: {
+        host: config.host,
+        user: config.user,
+        password: config.password,
+        port: config.port,
+      },
+    });
+  }
+
+  public upsertRole = async (role: PostgresRole) => {
+    const existingRole = await this.#db.raw(
+      'SELECT 1 FROM pg_roles WHERE rolname = ?',
+      [role.name]
+    );
+
+    if (existingRole.rows.length === 0) {
+      await this.#db.raw(
+        `CREATE ROLE ${role.name} WITH LOGIN PASSWORD '${role.password}'`,
+      );
+    } else {
+      await this.#db.raw(
+        `ALTER ROLE ${role.name} WITH PASSWORD '${role.password}'`,
+      );
+    }
+  }
+
+  public upsertDatabase = async (database: PostgresDatabase) => {
+    const existingDatabase = await this.#db.raw(
+      'SELECT * FROM pg_database WHERE datname = ?',
+      [database.name]
+    );
+
+
+    if (existingDatabase.rows.length === 0) {
+      await this.#db.raw(
+        `CREATE DATABASE ${database.name} OWNER ${database.owner}`,
+      );
+    } else {
+      await this.#db.raw(
+        `ALTER DATABASE ${database.name} OWNER TO ${database.owner}`,
+      );
+    }
+  }
+}
+
+export { PostgresService };