pc_nuxt/app/composables/useUser.js

/**
 * 用户状态管理 composable
 *
 * 管理：token、用户信息、登录状态、登录弹窗显隐
 * Token 持久化：Cookie（SSR 安全，Nuxt useCookie 自动同步服务端/客户端）
 */
export function useUser() {
  const token = useCookie('token', {
    maxAge: 7 * 24 * 3600,
    path: '/',
  })

  const userInfo = useState('userInfo', () => ({
    user_id: null,
    user_name: '',
    avatar: '',
    nickname: '',
    open_id: '',
    vip_type: 0,
    balance: 0,
  }))

  const isLogin = computed(() => !!token.value && !!userInfo.value.user_id)

  // 登录弹窗全局状态（任何组件都可以触发）
  const showLogin = useState('showLogin', () => false)

  /**
   * 设置登录态
   */
  function setLogin(data) {
    token.value = data.token
    userInfo.value = {
      user_id: data.user_id,
      user_name: data.user_name || data.nickname || '',
      avatar: data.avatar || '',
      nickname: data.nickname || data.user_name || '',
      open_id: data.open_id || '',
      vip_type: data.vip_type || 0,
      balance: data.balance || 0,
    }
    // 同步写入 open_id Cookie（供 useApi 读取 uid）
    if (data.open_id) {
      const openIdCookie = useCookie('open_id', { path: '/' })
      openIdCookie.value = data.open_id
    }
  }

  /**
   * 退出登录
   */
  function logout() {
    token.value = null
    userInfo.value = {
      user_id: null,
      user_name: '',
      avatar: '',
      nickname: '',
      open_id: '',
      vip_type: 0,
      balance: 0,
    }
    // 清除 open_id Cookie
    const openIdCookie = useCookie('open_id', { path: '/' })
    openIdCookie.value = null
  }

  /**
   * 刷新用户信息
   */
  async function refreshUserInfo() {
    if (!token.value) return
    try {
      const { post } = useApi()
      const res = await post('/user/getuserinfo')
      if (res.code === 0 && res.data) {
        userInfo.value = {
          ...userInfo.value,
          ...res.data,
        }
      }
    } catch (e) {
      // 获取失败不中断
    }
  }

  /**
   * 初始化：如果有 token 但无 userInfo，自动刷新
   */
  async function init() {
    if (token.value && !userInfo.value.user_id) {
      await refreshUserInfo()
    }
  }

  /**
   * 处理 1009 鉴权失效（由 useApi 调用）
   */
  function handleAuthError() {
    if (import.meta.client) {
      logout()
      showLogin.value = true
    }
  }

  // 客户端初始化
  if (import.meta.client) {
    init()
  }

  return {
    token,
    userInfo,
    isLogin,
    showLogin,
    setLogin,
    logout,
    refreshUserInfo,
    handleAuthError,
    init,
  }
}