feat(Postgres Node): Overhaul node

packages/nodes-base/nodes/Postgres/v2/methods/credentialTest.ts

@@ -0,0 +1,68 @@
+import type {
+	ICredentialsDecrypted,
+	ICredentialTestFunctions,
+	IDataObject,
+	INodeCredentialTestResult,
+} from 'n8n-workflow';
+
+import { Connections } from '../transport';
+
+import { Client } from 'ssh2';
+import type { ConnectionsData, PgpClient } from '../helpers/interfaces';
+
+export async function postgresConnectionTest(
+	this: ICredentialTestFunctions,
+	credential: ICredentialsDecrypted,
+): Promise<INodeCredentialTestResult> {
+	const credentials = credential.data as IDataObject;
+
+	let sshClientCreated: Client | undefined = new Client();
+	let pgpClientCreated: PgpClient | undefined;
+
+	try {
+		const { db, pgp, sshClient } = (await Connections.getInstance(
+			credentials,
+			{},
+			true,
+			sshClientCreated,
+		)) as ConnectionsData;
+
+		sshClientCreated = sshClient;
+		pgpClientCreated = pgp;
+
+		await db.connect();
+	} catch (error) {
+		let message = error.message as string;
+
+		if (error.message.includes('ECONNREFUSED')) {
+			message = 'Connection refused';
+		}
+
+		if (error.message.includes('ENOTFOUND')) {
+			message = 'Host not found, please check your host name';
+		}
+
+		if (error.message.includes('ETIMEDOUT')) {
+			message = 'Connection timed out';
+		}
+
+		return {
+			status: 'Error',
+			message,
+		};
+	} finally {
+		if (sshClientCreated) {
+			sshClientCreated.end();
+		}
+		if (pgpClientCreated) {
+			pgpClientCreated.end();
+		}
+
+		//set the connection instance to null so that it can be recreated
+		await Connections.getInstance({}, {}, false, undefined, true);
+	}
+	return {
+		status: 'OK',
+		message: 'Connection successful!',
+	};
+}