apiClient.js

var fetch = require('node-fetch');

function ApiClient(options) {
	options = options || {};

	var authKey = options.authKey;
	var endpoint = options.endpoint || 'https://api.strem.io';

	this.endpoint = endpoint;

	this.request = function(method, params) {
		var fetchOptions = {
			method: 'POST',
			headers: {
				'content-type': 'application/json'
			},
			body: JSON.stringify(Object.assign({ authKey: authKey }, params))
		};

		return fetch(endpoint + '/api/' + method, fetchOptions)
			.then(function(resp) {
				if (resp.status !== 200) {
					throw new Error('request failed with status code ' + resp.status);
				}

				return resp.json();
			})
			.then(function(body) {
				if (body.error) {
					throw body.error;
				}

				if (!body.result) {
					throw new Error('response has no result');
				}

				return body.result;
			});
	};

	Object.freeze(this);
	return this;
}

module.exports = ApiClient;