feat(Beeminder Node): Update Beeminder node to include all resources and operations (#17713)

packages/nodes-base/nodes/Beeminder/GenericFunctions.ts

@@ -7,9 +7,34 @@ import type {
 	IHttpRequestMethods,
 	IRequestOptions,
 } from 'n8n-workflow';
+import { ApplicationError } from 'n8n-workflow';
 
 const BEEMINDER_URI = 'https://www.beeminder.com/api/v1';
 
+function isValidAuthenticationMethod(value: unknown): value is 'apiToken' | 'oAuth2' {
+	return typeof value === 'string' && ['apiToken', 'oAuth2'].includes(value);
+}
+
+function convertToFormData(obj: any): Record<string, string> {
+	const result: Record<string, string> = {};
+	for (const [key, value] of Object.entries(obj)) {
+		if (value === null || value === undefined) {
+			// Skip null/undefined values
+			continue;
+		} else if (typeof value === 'boolean') {
+			result[key] = value.toString();
+		} else if (typeof value === 'number') {
+			result[key] = value.toString();
+		} else if (Array.isArray(value)) {
+			// Handle arrays - convert to JSON string for form data
+			result[key] = JSON.stringify(value);
+		} else {
+			result[key] = String(value);
+		}
+	}
+	return result;
+}
+
 export async function beeminderApiRequest(
 	this: IExecuteFunctions | IWebhookFunctions | IHookFunctions | ILoadOptionsFunctions,
 	method: IHttpRequestMethods,
@@ -17,24 +42,45 @@ export async function beeminderApiRequest(
 
 	body: any = {},
 	query: IDataObject = {},
+	useFormData: boolean = false,
 ): Promise<any> {
+	const authenticationMethod = this.getNodeParameter('authentication', 0, 'apiToken');
+
+	if (!isValidAuthenticationMethod(authenticationMethod)) {
+		throw new ApplicationError(`Invalid authentication method: ${authenticationMethod}`);
+	}
+
+	let credentialType = 'beeminderApi';
+	if (authenticationMethod === 'oAuth2') {
+		credentialType = 'beeminderOAuth2Api';
+	}
+
 	const options: IRequestOptions = {
 		method,
-		body,
 		qs: query,
 		uri: `${BEEMINDER_URI}${endpoint}`,
 		json: true,
 	};
 
+	if (useFormData) {
+		options.formData = convertToFormData(body);
+	} else {
+		options.body = body;
+	}
+
 	if (!Object.keys(body as IDataObject).length) {
-		delete options.body;
+		if (useFormData) {
+			delete options.formData;
+		} else {
+			delete options.body;
+		}
 	}
 
 	if (!Object.keys(query).length) {
 		delete options.qs;
 	}
 
-	return await this.helpers.requestWithAuthentication.call(this, 'beeminderApi', options);
+	return await this.helpers.requestWithAuthentication.call(this, credentialType, options);
 }
 
 export async function beeminderApiRequestAllItems(