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import { BASE_URL, API_PREFIX, ERROR_MESSAGES } from './config'
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import * as auth from './auth'
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// 业务错误对象（携带 code，页面可按 code 定制处理）
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export class ApiError extends Error {
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code: number
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details?: string[]
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constructor(code: number, msg: string, details?: string[]) {
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super(msg)
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this.code = code
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this.details = details
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}
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}
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export interface RequestOptions {
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url: string
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method?: 'GET' | 'POST' | 'PUT' | 'DELETE'
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data?: any
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header?: Record<string, any>
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auth?: boolean // 默认 true，需要鉴权
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showError?: boolean // 默认 true，业务错误自动 toast
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}
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// 登录失效 / 账号禁用后的跳转处理（由 app.ts 注入，避免循环依赖）
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let onAuthExpired: (() => void) | null = null
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export function setAuthExpiredHandler(handler: () => void): void {
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onAuthExpired = handler
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}
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// 单例刷新锁，避免并发请求同时刷新
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let refreshingPromise: Promise<boolean> | null = null
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function doRefresh(): Promise<boolean> {
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if (!refreshingPromise) {
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refreshingPromise = new Promise<boolean>((resolve) => {
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const refreshToken = auth.getRefreshToken()
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const accessToken = auth.getAccessToken()
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if (!refreshToken || !accessToken) {
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resolve(false)
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return
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}
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wx.request({
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url: `${BASE_URL}${API_PREFIX}/user/refresh-token`,
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method: 'POST',
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header: { 'Content-Type': 'application/json' },
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data: { refresh_token: refreshToken, access_token: accessToken },
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success: (res) => {
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const body = res.data as { code: number; data?: LoginTokenResponse }
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if (body && body.code === 0 && body.data) {
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auth.setTokens({
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accessToken: body.data.access_token,
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refreshToken: body.data.refresh_token,
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expireTime: body.data.expire_time,
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})
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resolve(true)
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} else {
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resolve(false)
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}
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},
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fail: () => resolve(false),
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})
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}).finally(() => {
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refreshingPromise = null
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})
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}
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return refreshingPromise
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}
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interface LoginTokenResponse {
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access_token: string
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refresh_token: string
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expire_time: number
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}
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function showToast(title: string): void {
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wx.showToast({ title, icon: 'none', duration: 2000 })
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}
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function redirectToLogin(): void {
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if (onAuthExpired) {
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onAuthExpired()
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} else {
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wx.reLaunch({ url: '/pages/login/login' })
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}
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}
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export function request<T = any>(options: RequestOptions): Promise<T> {
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const {
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url,
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method = 'GET',
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data,
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header = {},
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auth: needAuth = true,
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showError = true,
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} = options
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const fullUrl = url.startsWith('http') ? url : `${BASE_URL}${API_PREFIX}${url}`
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return new Promise<T>((resolve, reject) => {
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const doCall = (): void => {
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const finalHeader: Record<string, any> = {
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'Content-Type': 'application/json',
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...header,
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}
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if (needAuth) {
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const token = auth.getAccessToken()
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if (token) finalHeader['Authorization'] = `Bearer ${token}`
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}
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wx.request({
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url: fullUrl,
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method,
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data,
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header: finalHeader,
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success: (res) => {
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const body = res.data as { code: number; msg: string; data?: T; details?: string[] }
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// 网络层异常：响应体无 code
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if (!body || typeof body.code !== 'number') {
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if (showError) showToast('网络异常，请稍后重试')
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reject(new Error('network error'))
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return
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}
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const code = body.code
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// 成功
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if (code === 0) {
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resolve(body.data as T)
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return
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}
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// Token 失效：尝试刷新后重试一次
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if (
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needAuth &&
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(code === 11001 || code === 11002 || code === 11004 || res.statusCode === 401)
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) {
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doRefresh().then((ok) => {
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if (ok) {
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doCall()
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} else {
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auth.clearTokens()
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redirectToLogin()
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if (showError) showToast('登录已过期，请重新登录')
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reject(new ApiError(code, body.msg || '登录已过期'))
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}
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})
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return
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}
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// 账号禁用（HTTP 200，需单独处理）
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if (code === 21001) {
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auth.clearTokens()
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redirectToLogin()
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if (showError) showToast(ERROR_MESSAGES[21001] || '账号已被禁用')
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reject(new ApiError(code, body.msg || '账号已被禁用'))
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return
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}
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// 其余业务错误
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if (showError) {
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const msg =
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(body.details && body.details[0]) || ERROR_MESSAGES[code] || body.msg || '请求失败'
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showToast(msg)
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}
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reject(new ApiError(code, body.msg || '请求失败', body.details))
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},
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fail: () => {
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if (showError) showToast('网络异常，请检查网络后重试')
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reject(new Error('request fail'))
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},
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})
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}
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doCall()
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})
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}
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// 文件上传（multipart，字段名 file）
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export function uploadFile<T = any>(filePath: string, name = 'file', url = '/clothes/upload'): Promise<T> {
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const token = auth.getAccessToken()
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const header: Record<string, any> = {}
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if (token) header['Authorization'] = `Bearer ${token}`
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return new Promise<T>((resolve, reject) => {
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wx.uploadFile({
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url: url.startsWith('http') ? url : `${BASE_URL}${API_PREFIX}${url}`,
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filePath,
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name,
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header,
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success: (res) => {
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let body: { code: number; msg: string; data?: T; details?: string[] } | null = null
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try {
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body = JSON.parse(res.data)
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} catch (e) {
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body = null
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}
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if (body && typeof body.code === 'number') {
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if (body.code === 0) {
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resolve(body.data as T)
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} else {
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const msg =
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(body.details && body.details[0]) || ERROR_MESSAGES[body.code] || body.msg || '上传失败'
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showToast(msg)
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reject(new ApiError(body.code, body.msg || '上传失败', body.details))
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}
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} else {
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showToast('上传失败，请稍后重试')
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reject(new Error('upload fail'))
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}
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},
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fail: () => {
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showToast('上传失败，请检查网络后重试')
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reject(new Error('upload fail'))
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},
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})
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})
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}
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