tesco/lib/Library/TescoAPI.js

A complimentary Node wrapper for the public Tesco Supermarket API.

'use strict';

Object.defineProperty(exports, "__esModule", {
	value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _requestPromise = require('request-promise');

var _requestPromise2 = _interopRequireDefault(_requestPromise);

var _ProductSearchFormat = require('./Helpers/ProductSearchFormat');

var _ProductSearchFormat2 = _interopRequireDefault(_ProductSearchFormat);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var TescoAPI = function () {
	function TescoAPI(key) {
		_classCallCheck(this, TescoAPI);

		if (!key) throw new Error('You need to provide an API key. Go to https://devportal.tescolabs.com/ and grab one.');

		this.baseURL = 'https://dev.tescolabs.com';
		this.request = {
			uri: this.baseURL,
			json: true,
			resolveWithFullResponse: true,
			headers: {
				'Ocp-Apim-Subscription-Key': key
			},
			qs: {
				query: String,
				offset: Number,
				limit: Number
			}
		};
	}

	_createClass(TescoAPI, [{
		key: 'search',
		value: function search(query, props, cb) {

			if (!query) throw new Error('You must pass a query string parameter.');

			// At this moment in time, the API only accepts a subscription
			// to the Grocery Product Search API.
			// This will need case switching/split in to modules to in
			// order to define what the URL will be.
			this.request.uri = this.baseURL + '/grocery/products/';
			this.request.qs.query = query;

			// If nothing is passed to the props object, we still need to
			// set them in order to return data.
			if (!props.limit) props.limit = 10;
			if (!props.offset) props.offset = 0;

			// Merge the request query string with the props.
			Object.assign(this.request.qs, props);

			var res = void 0,
			    err = void 0;

			// Send request.
			(0, _requestPromise2.default)(this.request).then(function (response) {

				var Products = response.body.uk.ghs.products;

				// Build pagination URL's.
				var Pagination = {};
				var URI = response.request.uri;

				Pagination.next = URI.protocol + '//' + URI.host + '/?query=' + query + '&offset=' + (props.offset + 1) + '&limit=' + props.limit;
				Pagination.previous = URI.protocol + '//' + URI.host + '/?query=' + query + '&offset=' + (props.offset > 0 ? props.offset - 1 : props.offset) + '&limit=' + props.limit;

				// Set Pagination inside response.
				Products.pagination = Pagination;

				// Format that lovely data.
				res = new _ProductSearchFormat2.default(Products);
			}).catch(function (error) {
				return err = error;
			}).then(function () {
				return cb(err, res);
			});
		}
	}]);

	return TescoAPI;
}();

exports.default = TescoAPI;