openchain-sdk-yxl-wx-request/lib/common/type.js

openchain sd YxL wx request

'use strict';

const type = exports;

/**
 * 类型检查工具函数
 */

// 基础类型检查
type.undefined = function(value) {
  return typeof value === 'undefined';
};

type.string = function(value) {
  return typeof value === 'string';
};

type.number = function(value) {
  return typeof value === 'number' && !isNaN(value);
};

type.boolean = function(value) {
  return typeof value === 'boolean';
};

type.array = function(value) {
  return Array.isArray(value);
};

type.object = function(value) {
  return value !== null && typeof value === 'object' && !Array.isArray(value);
};

type.function = function(value) {
  return typeof value === 'function';
};

type.numeric = function(value) {
  return !isNaN(parseFloat(value)) && isFinite(value);
};

// 特殊类型检查
type.buffer = function(value) {
  return Buffer.isBuffer(value);
};

type.date = function(value) {
  return value instanceof Date;
};

type.error = function(value) {
  return value instanceof Error;
};

type.promise = function(value) {
  return value && typeof value.then === 'function';
};

// 空值检查
type.empty = function(value) {
  if (type.array(value)) return value.length === 0;
  if (type.object(value)) return Object.keys(value).length === 0;
  if (type.string(value)) return value.trim().length === 0;
  return !value;
};