wechat-api/lib/api_shop_stock.js

'use strict';

// 库存管理接口
var util = require('./util');
var wrapper = util.wrapper;
var postJSON = util.postJSON;

/**
 * 增加库存
 * 详细请看：<http://mp.weixin.qq.com/wiki/8/703923b7349a607f13fb3100163837f0.html>
 * Examples:
 * ```
 * api.updateStock(10, productId, sku, callback); // 增加10件库存
 * api.updateStock(-10, productId, sku, callback); // 减少10件库存
 * ```
 * Callback:
 *
 * - `err`, 调用失败时得到的异常
 * - `result`, 调用正常时得到的对象
 *
 * Result:
 * ```
 * {
 *  "errcode": 0,
 *  "errmsg": "success"
 * }
 * ```
 * @param {Number} number 增加或者删除的数量
 * @param {String} productId 商品ID
 * @param {String} sku SKU信息
 * @param {Function} callback 回调函数
 */
exports.updateStock = function (number, productId, sku, callback) {
  this.preRequest(this._updateStock, arguments);
};

/*!
 * 更新商品库存的未封装版本
 */
exports._updateStock = function (number, productId, sku, callback) {
  var url;
  if (number > 0) {
    url = this.endpoint + '/merchant/stock/add?access_token=' + this.token.accessToken;
  } else {
    url = this.endpoint + '/merchant/stock/reduce?access_token=' + this.token.accessToken;
  }
  var data = {
    'product_id': productId,
    'sku_info': sku,
    'quantity': Math.abs(number)
  };
  this.request(url, postJSON(data), wrapper(callback));
};