H5：utils

const camelizeReg = /-(\w)/g
const kebabCaseReg = /([A-Z])/g

/**
 * kebab转小驼峰
 */
export function camelize(str: string): string {
  return str.replace(camelizeReg, (_, c) => c.toUpperCase())
}

/**
 * 小驼峰字符串转kebab
 */
export function kebabCase(str: string): string {
  return str.replace(kebabCaseReg, '-$1').toLocaleLowerCase().replace(/^-/, '')
}

/**
 * 判断某个字符串是否为正确的数字格式
 */
export function isNumeric(val: string): boolean {
  return /^\d+(\.\d+)?$/.test(val)
}

/**
 * 判断是否为开发环境
 */
export const isDev = process.env.NODE_ENV === 'development'

/**
 * 判断是否在浏览器里
 */
export const inBrowser = typeof window !== 'undefined'

/**
 * 判断是否为Android系统
 */
export function isAndroid(): boolean {
  return inBrowser ? /android/.test(navigator.userAgent.toLowerCase()) : false
}

/**
 * 判断是否为iOS系统
 */
export function isIOS(): boolean {
  return inBrowser ? /ios|iphone|ipad|ipod/.test(navigator.userAgent.toLowerCase()) : false
}

/**
 * 判断是否定义了: 非null并且非undefined
 */
export function isDef<T>(val: T): val is NonNullable<T> {
  return val !== undefined && val !== null
}

/**
 * 判断是否为函数
 */
export function isFunction(val: unknown): val is Function {
  return typeof val === 'function'
}

/**
 * 判断是否为非null的object
 * @param val 
 * @returns 
 */
export function isObject(val: unknown): val is Record<any, any> {
  return val !== null && typeof val === 'object'
}

/**
 * 判断是否为promise
 */
export function isPromise<T = any>(val: unknown): val is Promise<T> {
  return isObject(val) && isFunction(val.then) && isFunction(val.catch)
}