feat(Google Vertex Chat Model Node): Add an option to specify GCP region

packages/@n8n/nodes-langchain/nodes/llms/LmChatGoogleVertex/LmChatGoogleVertex.node.ts

@@ -131,6 +131,7 @@ export class LmChatGoogleVertex implements INodeType {
 		const credentials = await this.getCredentials('googleApi');
 		const privateKey = formatPrivateKey(credentials.privateKey as string);
 		const email = (credentials.email as string).trim();
+		const region = credentials.region as string;
 
 		const modelName = this.getNodeParameter('modelName', itemIndex) as string;
 
@@ -165,6 +166,7 @@ export class LmChatGoogleVertex implements INodeType {
 						private_key: privateKey,
 					},
 				},
+				location: region,
 				model: modelName,
 				topK: options.topK,
 				topP: options.topP,

packages/nodes-base/credentials/GoogleApi.credentials.ts

@@ -10,6 +10,214 @@ import type {
 	Icon,
 } from 'n8n-workflow';
 
+const regions = [
+	{
+		name: 'africa-south1',
+		displayName: 'Africa',
+		location: 'Johannesburg',
+	},
+	{
+		name: 'asia-east1',
+		displayName: 'Asia Pacific',
+		location: 'Changhua County',
+	},
+	{
+		name: 'asia-east2',
+		displayName: 'Asia Pacific',
+		location: 'Hong Kong',
+	},
+	{
+		name: 'asia-northeast1',
+		displayName: 'Asia Pacific',
+		location: 'Tokyo',
+	},
+	{
+		name: 'asia-northeast2',
+		displayName: 'Asia Pacific',
+		location: 'Osaka',
+	},
+	{
+		name: 'asia-northeast3',
+		displayName: 'Asia Pacific',
+		location: 'Seoul',
+	},
+	{
+		name: 'asia-south1',
+		displayName: 'Asia Pacific',
+		location: 'Mumbai',
+	},
+	{
+		name: 'asia-south2',
+		displayName: 'Asia Pacific',
+		location: 'Delhi',
+	},
+	{
+		name: 'asia-southeast1',
+		displayName: 'Asia Pacific',
+		location: 'Jurong West',
+	},
+	{
+		name: 'asia-southeast2',
+		displayName: 'Asia Pacific',
+		location: 'Jakarta',
+	},
+	{
+		name: 'australia-southeast1',
+		displayName: 'Asia Pacific',
+		location: 'Sydney',
+	},
+	{
+		name: 'australia-southeast2',
+		displayName: 'Asia Pacific',
+		location: 'Melbourne',
+	},
+	{
+		name: 'europe-central2',
+		displayName: 'Europe',
+		location: 'Warsaw',
+	},
+	{
+		name: 'europe-north1',
+		displayName: 'Europe',
+		location: 'Hamina',
+	},
+	{
+		name: 'europe-southwest1',
+		displayName: 'Europe',
+		location: 'Madrid',
+	},
+	{
+		name: 'europe-west1',
+		displayName: 'Europe',
+		location: 'St. Ghislain',
+	},
+	{
+		name: 'europe-west10',
+		displayName: 'Europe',
+		location: 'Berlin',
+	},
+	{
+		name: 'europe-west12',
+		displayName: 'Europe',
+		location: 'Turin',
+	},
+	{
+		name: 'europe-west2',
+		displayName: 'Europe',
+		location: 'London',
+	},
+	{
+		name: 'europe-west3',
+		displayName: 'Europe',
+		location: 'Frankfurt',
+	},
+	{
+		name: 'europe-west4',
+		displayName: 'Europe',
+		location: 'Eemshaven',
+	},
+	{
+		name: 'europe-west6',
+		displayName: 'Europe',
+		location: 'Zurich',
+	},
+	{
+		name: 'europe-west8',
+		displayName: 'Europe',
+		location: 'Milan',
+	},
+	{
+		name: 'europe-west9',
+		displayName: 'Europe',
+		location: 'Paris',
+	},
+	{
+		name: 'me-central1',
+		displayName: 'Middle East',
+		location: 'Doha',
+	},
+	{
+		name: 'me-central2',
+		displayName: 'Middle East',
+		location: 'Dammam',
+	},
+	{
+		name: 'me-west1',
+		displayName: 'Middle East',
+		location: 'Tel Aviv',
+	},
+	{
+		name: 'northamerica-northeast1',
+		displayName: 'Americas',
+		location: 'Montréal',
+	},
+	{
+		name: 'northamerica-northeast2',
+		displayName: 'Americas',
+		location: 'Toronto',
+	},
+	{
+		name: 'northamerica-south1',
+		displayName: 'Americas',
+		location: 'Queretaro',
+	},
+	{
+		name: 'southamerica-east1',
+		displayName: 'Americas',
+		location: 'Osasco',
+	},
+	{
+		name: 'southamerica-west1',
+		displayName: 'Americas',
+		location: 'Santiago',
+	},
+	{
+		name: 'us-central1',
+		displayName: 'Americas',
+		location: 'Council Bluffs',
+	},
+	{
+		name: 'us-east1',
+		displayName: 'Americas',
+		location: 'Moncks Corner',
+	},
+	{
+		name: 'us-east4',
+		displayName: 'Americas',
+		location: 'Ashburn',
+	},
+	{
+		name: 'us-east5',
+		displayName: 'Americas',
+		location: 'Columbus',
+	},
+	{
+		name: 'us-south1',
+		displayName: 'Americas',
+		location: 'Dallas',
+	},
+	{
+		name: 'us-west1',
+		displayName: 'Americas',
+		location: 'The Dalles',
+	},
+	{
+		name: 'us-west2',
+		displayName: 'Americas',
+		location: 'Los Angeles',
+	},
+	{
+		name: 'us-west3',
+		displayName: 'Americas',
+		location: 'Salt Lake City',
+	},
+	{
+		name: 'us-west4',
+		displayName: 'Americas',
+		location: 'Las Vegas',
+	},
+] as const;
+
 export class GoogleApi implements ICredentialType {
 	name = 'googleApi';
 
@@ -20,6 +228,18 @@ export class GoogleApi implements ICredentialType {
 	icon: Icon = 'file:icons/Google.svg';
 
 	properties: INodeProperties[] = [
+		{
+			displayName: 'Region',
+			name: 'region',
+			type: 'options',
+			options: regions.map((r) => ({
+				name: `${r.displayName} (${r.location}) - ${r.name}`,
+				value: r.name,
+			})),
+			default: 'us-central1',
+			description:
+				'The region where the Google Cloud service is located. This applies only to specific nodes, like the Google Vertex Chat Model',
+		},
 		{
 			displayName: 'Service Account Email',
 			name: 'email',