@toosick/amazon-mws/lib/AmazonMwsMethod.basic.js

Amazon MWS API wrapper

'use strict';

var _ = require('lodash');

module.exports = {

    setMetadata: function (id, key, value, auth, cb) {
        var self = this;
        var data = key;
        var isObject = _.isPlainObject(key);
        // We assume null for an empty object
        var isNull = data === null || (isObject && !Object.keys(data).length);

        // Allow optional passing of auth & cb:
        if ((isNull || isObject) && typeof value === 'string') {
            auth = value;
        } else if (typeof auth !== 'string') {
            if (!cb && typeof auth === 'function') {
                cb = auth;
            }
            auth = null;
        }

        var urlData = this.createUrlData();
        var path = this.createFullPath('/' + id, urlData);

        return this.wrapTimeout(new Promise(function (resolve, reject) {
            if (isNull) {
                // Reset metadata:
                sendMetadata(null, auth);
            } else if (!isObject) {
                // Set individual metadata property:
                var metadata = {};
                metadata[key] = value;
                sendMetadata(metadata, auth);
            } else {
                // Set entire metadata object after resetting it:
                this._request('POST', path, {
                    metadata: null
                }, auth, {}, function (err) {
                    if (err) {
                        return reject(err);
                    }
                    sendMetadata(data, auth);
                });
            }

            function sendMetadata(metadata, auth) {
                self._request('POST', path, {
                    metadata: metadata
                }, auth, {}, function (err, response) {
                    if (err) {
                        reject(err);
                    } else {
                        resolve(response.metadata);
                    }
                });
            }
        }.bind(this)), cb);
    },

    getMetadata: function (id, auth, cb) {
        if (!cb && typeof auth === 'function') {
            cb = auth;
            auth = null;
        }

        var urlData = this.createUrlData();
        var path = this.createFullPath('/' + id, urlData);

        return this.wrapTimeout(new Promise(function (resolve, reject) {
            this._request('GET', path, {}, auth, {}, function (err, response) {
                if (err) {
                    reject(err);
                } else {
                    resolve(response.metadata);
                }
            });
        }.bind(this)), cb);
    }

};