n8n/packages/nodes-base/nodes/Drift/GenericFunctions.ts

import { OptionsWithUri } from 'request';

import {
	IExecuteFunctions,
	ILoadOptionsFunctions,
} from 'n8n-core';

import {
	IDataObject,
	IHookFunctions,
	IWebhookFunctions
} from 'n8n-workflow';

export async function driftApiRequest(this: IExecuteFunctions | IWebhookFunctions | IHookFunctions | ILoadOptionsFunctions, method: string, resource: string, body: any = {}, query: IDataObject = {}, uri?: string, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
	let options: OptionsWithUri = {
		headers: {},
		method,
		body,
		qs: query,
		uri: uri || `https://driftapi.com${resource}`,
		json: true
	};

	if (!Object.keys(body).length) {
		delete options.form;
	}
	if (!Object.keys(query).length) {
		delete options.qs;
	}
	options = Object.assign({}, options, option);

	const authenticationMethod = this.getNodeParameter('authentication', 0);

	try {
		if (authenticationMethod === 'accessToken') {
			const credentials = this.getCredentials('driftApi');

			if (credentials === undefined) {
				throw new Error('No credentials got returned!');
			}

			options.headers!['Authorization'] = `Bearer ${credentials.accessToken}`;

			return await this.helpers.request!(options);
		} else {
			return await this.helpers.requestOAuth2!.call(this, 'driftOAuth2Api', options);
		}
	} catch (error) {

		if (error.response && error.response.body && error.response.body.error) {
			const errorMessage = error.response.body.error.message;
			throw new Error(`Drift error response [${error.statusCode}]: ${errorMessage}`);
		}
		throw error;
	}
}