Make it public!

lib/interfaces/database.ts

@@ -0,0 +1,76 @@
+import { Client } from 'https://deno.land/x/postgres@v0.19.2/mod.ts';
+import 'std/dotenv/load.ts';
+
+const POSTGRESQL_HOST = Deno.env.get('POSTGRESQL_HOST') || '';
+const POSTGRESQL_USER = Deno.env.get('POSTGRESQL_USER') || '';
+const POSTGRESQL_PASSWORD = Deno.env.get('POSTGRESQL_PASSWORD') || '';
+const POSTGRESQL_DBNAME = Deno.env.get('POSTGRESQL_DBNAME') || '';
+const POSTGRESQL_PORT = Deno.env.get('POSTGRESQL_PORT') || '';
+const POSTGRESQL_CAFILE = Deno.env.get('POSTGRESQL_CAFILE') || '';
+
+const tls = POSTGRESQL_CAFILE
+  ? {
+    enabled: true,
+    enforce: false,
+    caCertificates: [await Deno.readTextFile(POSTGRESQL_CAFILE)],
+  }
+  : {
+    enabled: true,
+    enforce: false,
+  };
+
+export default class Database {
+  protected db?: Client;
+
+  constructor(connectNow = false) {
+    if (connectNow) {
+      this.connectToPostgres();
+    }
+  }
+
+  protected async connectToPostgres() {
+    if (this.db) {
+      return this.db;
+    }
+
+    const postgresClient = new Client({
+      user: POSTGRESQL_USER,
+      password: POSTGRESQL_PASSWORD,
+      database: POSTGRESQL_DBNAME,
+      hostname: POSTGRESQL_HOST,
+      port: POSTGRESQL_PORT,
+      tls,
+    });
+
+    await postgresClient.connect();
+
+    this.db = postgresClient;
+  }
+
+  protected async disconnectFromPostgres() {
+    if (!this.db) {
+      return;
+    }
+
+    await this.db.end();
+
+    this.db = undefined;
+  }
+
+  public close() {
+    this.disconnectFromPostgres();
+  }
+
+  public async query<T>(sql: string, args?: any[]) {
+    if (!this.db) {
+      await this.connectToPostgres();
+    }
+
+    const result = await this.db!.queryObject<T>(sql, args);
+
+    return result.rows;
+  }
+}
+
+// This allows us to have nice SQL syntax highlighting in template literals
+export const sql = String.raw;