# All files / src/wx-mini replace.ts

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     import { options as sdkOptions, setTraceId } from '../core/options'
    import { ReplaceHandler, subscribeEvent, triggerHandlers } from '../common/subscribe'
    import { getTimestamp, replaceOld, throttle } from '../utils/helpers'
    import { HandleWxAppEvents, HandleWxPageEvents } from './handleWxEvents'
    import { WxAppEvents, WxPageEvents, WxRouteEvents, WxEvents, HTTP_CODE, EVENTTYPES, HTTPTYPE, BREADCRUMBTYPES, voidFun } from '../common/constant'
    import { getFlag, setFlag, variableTypeDetection } from '@/utils'
    import { MITOHttp } from '@/types/common'
    import { transportData } from '@/core'
    import { EMethods } from '@/types'
    import { getCurrentRoute, getNavigateBackTargetUrl } from './utils'
    import { ELinstenerTypes } from './constant'
    import { MiniRoute } from './types'

    function isFilterHttpUrl(url: string) {
      return sdkOptions.filterXhrUrlRegExp && sdkOptions.filterXhrUrlRegExp.test(url)
    }

    function replace(type: WxEvents | EVENTTYPES) {
      switch (type) {
        case EVENTTYPES.CONSOLE:
          replaceConsole()
          break
        case EVENTTYPES.XHR:
          replaceNetwork()
          break
        case EVENTTYPES.MINI_ROUTE:
          replaceRoute()
        default:
          break
      }
    }

    export function addReplaceHandler(handler: ReplaceHandler) {
      subscribeEvent(handler)
      replace(handler.type as WxEvents)
    }

    export function replaceApp() {
      if (App) {
        const originApp = App
        App = function (appOptions: WechatMiniprogram.App.Option) {
          const methods = [
            WxAppEvents.AppOnLaunch,
            WxAppEvents.AppOnShow,
            WxAppEvents.AppOnError,
            WxAppEvents.AppOnUnhandledRejection,
            WxAppEvents.AppOnPageNotFound,
            WxAppEvents.AppOnHide
          ]
          methods.forEach((method) => {
            if (getFlag(method)) return
            addReplaceHandler({
              callback: (data) => HandleWxAppEvents[method.replace('AppOn', 'on')](data),
              type: method
            })
            replaceOld(
              appOptions,
              method.replace('AppOn', 'on'),
              function (originMethod: voidFun) {
                return function (...args: any): void {
                  triggerHandlers.apply(null, [method, ...args])
                  if (originMethod) {
                    originMethod.apply(this, args)
                  }
                }
              },
              true
            )
          })
          return originApp(appOptions)
        } as WechatMiniprogram.App.Constructor
      }
    }

    export function replacePage() {
      if (!Page) {
        return
      }
      const originPage = Page
      Page = function (pageOptions): WechatMiniprogram.Page.Constructor {
        const methods = [
          WxPageEvents.PageOnShow,
          WxPageEvents.PageOnHide,
          WxPageEvents.PageOnShareAppMessage,
          WxPageEvents.PageOnShareTimeline,
          WxPageEvents.PageOnTabItemTap
        ]
        methods.forEach((method) => {
          if (getFlag(method)) return
          addReplaceHandler({
            callback: (data) => HandleWxPageEvents[method.replace('PageOn', 'on')](data),
            type: method
          })
          replaceOld(
            pageOptions,
            method.replace('PageOn', 'on'),
            function (originMethod: (args: any) => void) {
              return function (...args: any[]): void {
                triggerHandlers.apply(null, [method, ...args])
                if (originMethod) {
                  originMethod.apply(this, args)
                }
              }
            },
            true
          )
        })
        function isNotAction(method) {
          // 如果是method中处理过的方法，则不是处理用户手势行为的方法
          return methods.find((m) => m.replace('PageOn', 'on') === method)
        }
        addReplaceHandler({
          callback: (data) => HandleWxPageEvents.onAction(data),
          type: EVENTTYPES.DOM
        })
        function gestureTrigger(e) {
          e.mitoProcessed = true // 给事件对象增加特殊的标记，避免被无限透传
          triggerHandlers(EVENTTYPES.DOM, e)
        }
        const throttleGesturetrigger = throttle(gestureTrigger, 500)
        const linstenerTypes = [ELinstenerTypes.Touchmove, ELinstenerTypes.Tap]
        Object.keys(pageOptions).forEach((m) => {
          if ('function' !== typeof pageOptions[m] || isNotAction(m)) {
            return
          }
          replaceOld(
            pageOptions,
            m,
            function (originMethod: (args: any) => void) {
              return function (...args: any): void {
                const e = args[0]
                if (e && e.type && e.currentTarget && !e.mitoProcessed) {
                  if (linstenerTypes.indexOf(e.type)) {
                    throttleGesturetrigger(e)
                  }
                }
                originMethod.apply(this, args)
              }
            },
            true
          )
        })
        return originPage.call(this, pageOptions)
      }
    }

    function replaceConsole() {
      if (console && variableTypeDetection.isObject(console)) {
        const logType = ['log', 'debug', 'info', 'warn', 'error', 'assert']
        logType.forEach(function (level: string): void {
          if (!(level in console)) return
          replaceOld(console, level, function (originalConsole): Function {
            return function (...args: any[]): void {
              if (originalConsole) {
                triggerHandlers(EVENTTYPES.CONSOLE, { args, level })
                originalConsole.apply(console, args)
              }
            }
          })
        })
      }
    }

    // wx network
    export function replaceNetwork() {
      const hookMethods = ['request', 'downloadFile', 'uploadFile']
      hookMethods.forEach((hook) => {
        const originRequest = wx[hook]
        Object.defineProperty(wx, hook, {
          writable: true,
          enumerable: true,
          configurable: true,
          value: function (...args: any[]) {
            const options: WechatMiniprogram.RequestOption | WechatMiniprogram.DownloadFileOption | WechatMiniprogram.UploadFileOption = args[0]
            let method: string
            if ((options as WechatMiniprogram.RequestOption).method) {
              method = (options as WechatMiniprogram.RequestOption).method
            } else if (hook === 'downloadFile') {
              method = EMethods.Get
            } else {
              method = EMethods.Post
            }
            const { url, header } = options
            if ((method === EMethods.Post && transportData.isSdkTransportUrl(url)) || isFilterHttpUrl(url)) {
              return originRequest.call(this, options)
            }
            let reqData
            if (hook === 'request') {
              reqData = (options as WechatMiniprogram.RequestOption).data
            } else if (hook === 'downloadFile') {
              reqData = {
                filePath: (options as WechatMiniprogram.DownloadFileOption).filePath
              }
            } else {
              // uploadFile
              reqData = {
                filePath: (options as WechatMiniprogram.UploadFileOption).filePath,
                name: (options as WechatMiniprogram.UploadFileOption).name
              }
            }
            const data: MITOHttp = {
              type: HTTPTYPE.XHR,
              method,
              url,
              reqData,
              sTime: getTimestamp()
            }
            setTraceId(url, (headerFieldName, traceId) => {
              data.traceId = traceId
              header[headerFieldName] = traceId
            })
            function setRequestHeader(key: string, value: string) {
              header[key] = value
            }
            sdkOptions.beforeAppAjaxSend && sdkOptions.beforeAppAjaxSend({ method, url }, { setRequestHeader })

            const successHandler:
              | WechatMiniprogram.RequestSuccessCallback
              | WechatMiniprogram.DownloadFileSuccessCallback
              | WechatMiniprogram.UploadFileFailCallback = function (res) {
              const endTime = getTimestamp()
              data.responseText = (variableTypeDetection.isString(res.data) || variableTypeDetection.isObject(res.data)) && res.data
              data.elapsedTime = endTime - data.sTime
              data.status = res.statusCode
              data.errMsg = res.errMsg

              triggerHandlers(EVENTTYPES.XHR, data)
              if (typeof options.success === 'function') {
                return options.success(res)
              }
            }
            const failHandler:
              | WechatMiniprogram.RequestFailCallback
              | WechatMiniprogram.DownloadFileFailCallback
              | WechatMiniprogram.UploadFileFailCallback = function (err) {
              // 系统和网络层面的失败
              const endTime = getTimestamp()
              data.elapsedTime = endTime - data.sTime
              data.errMsg = err.errMsg

              triggerHandlers(EVENTTYPES.XHR, data)
              if (typeof options.fail === 'function') {
                return options.fail(err)
              }
            }
            const actOptions = {
              ...options,
              success: successHandler,
              fail: failHandler
            }

            return originRequest.call(this, actOptions)
          }
        })
      })
    }

    // wx Route
    export function replaceRoute() {
      const methods = [WxRouteEvents.SwitchTab, WxRouteEvents.ReLaunch, WxRouteEvents.RedirectTo, WxRouteEvents.NavigateTo, WxRouteEvents.NavigateBack]
      methods.forEach((method) => {
        const originMethod = wx[method] as Function
        Object.defineProperty(wx, method, {
          writable: true,
          enumerable: true,
          configurable: true,
          value: function (
            options:
              | WechatMiniprogram.SwitchTabOption
              | WechatMiniprogram.ReLaunchOption
              | WechatMiniprogram.RedirectToOption
              | WechatMiniprogram.NavigateToOption
              | WechatMiniprogram.NavigateBackOption
          ) {
            let toUrl
            if (method === WxRouteEvents.NavigateBack) {
              toUrl = getNavigateBackTargetUrl((options as WechatMiniprogram.NavigateBackOption).delta)
            } else {
              toUrl = (options as WechatMiniprogram.SwitchTabOption).url
            }
            const data = {
              from: getCurrentRoute(),
              to: toUrl
            }
            triggerHandlers(EVENTTYPES.MINI_ROUTE, data)
            // 如果complete||success||fail一个都没有，则原方法返回promise，此时sdk也不需要处理
            if (
              variableTypeDetection.isFunction(options.complete) ||
              variableTypeDetection.isFunction(options.success) ||
              variableTypeDetection.isFunction(options.fail)
            ) {
              const failHandler:
                | WechatMiniprogram.SwitchTabFailCallback
                | WechatMiniprogram.ReLaunchFailCallback
                | WechatMiniprogram.RedirectToFailCallback
                | WechatMiniprogram.NavigateToFailCallback
                | WechatMiniprogram.NavigateBackFailCallback = function (res) {
                const failData: MiniRoute = {
                  ...data,
                  isFail: true,
                  message: res.errMsg
                }
                triggerHandlers(EVENTTYPES.MINI_ROUTE, failData)
                if (variableTypeDetection.isFunction(options.fail)) {
                  return options.fail(res)
                }
              }
              options.fail = failHandler
            }
            return originMethod.call(this, options)
          }
        })
      })
    }