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

import { OptionsWithUri } from 'request';

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

import { IDataObject, NodeApiError } from 'n8n-workflow';

import { get } from 'lodash';

export async function helpscoutApiRequest(
	this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | IHookFunctions,
	method: string,
	resource: string,

	body: any = {},
	qs: IDataObject = {},
	uri?: string,
	option: IDataObject = {},
): Promise<any> {
	let options: OptionsWithUri = {
		headers: {
			'Content-Type': 'application/json',
		},
		method,
		body,
		qs,
		uri: uri || `https://api.helpscout.net${resource}`,
		json: true,
	};
	try {
		if (Object.keys(option).length !== 0) {
			options = Object.assign({}, options, option);
		}
		if (Object.keys(body).length === 0) {
			delete options.body;
		}
		//@ts-ignore
		return await this.helpers.requestOAuth2.call(this, 'helpScoutOAuth2Api', options);
	} catch (error) {
		throw new NodeApiError(this.getNode(), error);
	}
}

export async function helpscoutApiRequestAllItems(
	this: IExecuteFunctions | ILoadOptionsFunctions | IHookFunctions,
	propertyName: string,
	method: string,
	endpoint: string,

	body: any = {},
	query: IDataObject = {},
): Promise<any> {
	const returnData: IDataObject[] = [];

	let responseData;
	let uri;

	do {
		responseData = await helpscoutApiRequest.call(this, method, endpoint, body, query, uri);
		uri = get(responseData, '_links.next.href');
		returnData.push.apply(returnData, get(responseData, propertyName));
		if (query.limit && query.limit <= returnData.length) {
			return returnData;
		}
	} while (responseData._links?.next?.href !== undefined);

	return returnData;
}