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

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

import {
	OptionsWithUri,
} from 'request';

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

export interface IAttachment {
	fields: {
		item?: object[];
	};
	actions: {
		item?: object[];
	};
}

/**
 * Make an API request to Telegram
 *
 * @param {IHookFunctions} this
 * @param {string} method
 * @param {string} url
 * @param {object} body
 * @returns {Promise<any>}
 */
export async function apiRequest(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions, method: string, endpoint: string, body: object, query?: IDataObject): Promise<any> { // tslint:disable-line:no-any
	const credentials = await this.getCredentials('mattermostApi');

	if (credentials === undefined) {
		throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
	}

	query = query || {};

	const options: OptionsWithUri = {
		method,
		body,
		qs: query,
		uri: `${credentials.baseUrl}/api/v4/${endpoint}`,
		headers: {
			Authorization: `Bearer ${credentials.accessToken}`,
			'content-type': 'application/json; charset=utf-8',
		},
		json: true,
	};

	try {
		return await this.helpers.request!(options);
	} catch (error) {
		throw new NodeApiError(this.getNode(), error);
	}
}

export async function apiRequestAllItems(this: IExecuteFunctions | ILoadOptionsFunctions, method: string, endpoint: string, body: any = {}, query: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any

	const returnData: IDataObject[] = [];

	let responseData;
	query.page = 0;
	query.per_page = 100;

	do {
		responseData = await apiRequest.call(this, method, endpoint, body, query);
		query.page++;
		returnData.push.apply(returnData, responseData);
	} while (
		responseData.length !== 0
	);

	return returnData;
}