zkxw/mobile-oa-h5/src/utils/host-file-preview-nav.js

/**
 * 微信 web-view → 小程序附件预览/下载页
 * 对齐 OA 打印 PDF 的宿主跳转；避免 H5 window.open 在鸿蒙 ArkWeb 静默失败。
 */

import {
  getOaPrintHostApis,
  isWeChatMiniWebView,
  printNavLog
} from '../oa/print/oa-pdf-preview-nav.js'

const OPEN_DOCUMENT_EXTS = new Set([
  'pdf',
  'doc',
  'docx',
  'xls',
  'xlsx',
  'ppt',
  'pptx'
])

export function fileExtension(fileName) {
  const match = String(fileName || '')
    .trim()
    .toLowerCase()
    .match(/\.([a-z0-9]+)$/)
  return match ? match[1] : ''
}

/** openDocument 支持的类型；其它扩展返回空串 */
export function openDocumentFileType(fileName) {
  const ext = fileExtension(fileName)
  return OPEN_DOCUMENT_EXTS.has(ext) ? ext : ''
}

/** query 只用 ASCII 名，避免 navigateTo 被中文撑爆；扩展名保留供宿主识别类型 */
export function asciiHostFileName(fileName) {
  const ext = fileExtension(fileName) || 'bin'
  return `file.${ext}`
}

/**
 * @returns {{ path: string, queryLen: number, fileUrlLen: number, name: string, fileType: string }}
 */
export function buildHostFilePreviewPath({ fileUrl, fileName } = {}) {
  const key = String(fileUrl || '').trim()
  const name = asciiHostFileName(fileName)
  const fileType = openDocumentFileType(name)
  const q =
    'fileUrl=' +
    encodeURIComponent(key) +
    '&f=' +
    encodeURIComponent(key) +
    '&n=' +
    encodeURIComponent(name)
  const path = '/pages/oa/file-preview/index?' + q
  return {
    path,
    queryLen: q.length,
    fileUrlLen: key.length,
    name,
    fileType
  }
}

/**
 * @returns {Promise<{ ok: boolean, via?: string, path?: string, message?: string, assumed?: boolean }>}
 */
export function navigateToHostFilePreview({ fileUrl, fileName } = {}, deps = {}) {
  const { path, queryLen, fileUrlLen, name, fileType } = buildHostFilePreviewPath({
    fileUrl,
    fileName
  })
  const win =
    deps.window !== undefined
      ? deps.window
      : typeof window !== 'undefined'
        ? window
        : undefined
  const log = deps.log || printNavLog
  const { wxApi, uniApi } = getOaPrintHostApis(win)

  log('file-preview navigate start', {
    fileUrlLen,
    queryLen,
    pathLen: path.length,
    name,
    fileType,
    fileUrlPreview: String(fileUrl || '').slice(0, 120),
    hasWindowWx: !!(win && win.wx),
    hasWxMiniNavigate: !!(wxApi && wxApi.miniProgram && wxApi.miniProgram.navigateTo),
    hasUniWebViewNavigate: !!(uniApi && uniApi.webView && uniApi.webView.navigateTo),
    __wxjs_environment: win && win.__wxjs_environment
  })

  if (!String(fileUrl || '').trim()) {
    log('file-preview navigate abort: empty fileUrl')
    return Promise.resolve({ ok: false, message: '缺少 fileUrl' })
  }

  if (path.length > 900) {
    log('file-preview warn path long', { pathLen: path.length })
  }

  const invokeNavigate = (label, navigateFn) =>
    new Promise((resolve) => {
      if (typeof navigateFn !== 'function') {
        resolve(null)
        return
      }
      let settled = false
      const done = (result) => {
        if (settled) return
        settled = true
        resolve(result)
      }
      try {
        navigateFn({
          url: path,
          success: (res) => {
            log(label + ' success', res)
            done({ ok: true, via: label, path })
          },
          fail: (err) => {
            log(label + ' fail', err)
            done({
              ok: false,
              via: label,
              path,
              message: (err && (err.errMsg || err.message)) || 'navigateTo fail'
            })
          }
        })
        setTimeout(() => {
          if (!settled) {
            log(label + ' no-callback → assume ok', { pathLen: path.length })
            done({ ok: true, via: label, path, assumed: true })
          }
        }, 80)
      } catch (e) {
        log(label + ' throw', String(e && e.message ? e.message : e))
        done({
          ok: false,
          via: label,
          path,
          message: String(e && e.message ? e.message : e)
        })
      }
    })

  return invokeNavigate(
    'wx.miniProgram.navigateTo',
    wxApi && wxApi.miniProgram && wxApi.miniProgram.navigateTo
      ? wxApi.miniProgram.navigateTo.bind(wxApi.miniProgram)
      : null
  ).then((wxRes) => {
    if (wxRes && wxRes.ok) return wxRes
    if (wxRes && wxRes.ok === false) {
      log('file-preview wx failed, try uni', wxRes.message)
    }
    return invokeNavigate(
      'uni.webView.navigateTo',
      uniApi && uniApi.webView && uniApi.webView.navigateTo
        ? uniApi.webView.navigateTo.bind(uniApi.webView)
        : null
    ).then((uniRes) => {
      if (uniRes) return uniRes
      if (wxRes) return wxRes
      log('file-preview navigate unavailable')
      return {
        ok: false,
        message: '无法跳转附件预览页：未找到 wx/uni navigateTo'
      }
    })
  })
}

export { isWeChatMiniWebView }