feat: add multi-source breed encyclopedia and two-hour refresh sessions

pets-fe/app.js

@@ -1,15 +1,26 @@
 App({
-  globalData: { token: "", user: null },
+  globalData: { token: "", user: null, expiresAt: 0 },
   onLaunch() {
     this.globalData.token = wx.getStorageSync("pet_token") || "";
+    this.globalData.expiresAt = Number(wx.getStorageSync("pet_token_expires_at")) || 0;
     // Start immediately; pages await the same promise and display failures themselves.
     this.login().catch(() => {});
   },
   async login() {
     if (this.loginPromise) return this.loginPromise;
-    if (this.globalData.token) return this.globalData.token;
+    if (this.globalData.token && (!this.globalData.expiresAt || this.globalData.expiresAt > Date.now() / 1000 + 60)) return this.globalData.token;
     this.loginPromise = (async () => {
       const { request } = require("./utils/api");
+      const refreshToken = wx.getStorageSync("pet_refresh_token");
+      if (refreshToken) {
+        try {
+          const pair = await request("/auth/refresh", "POST", { refresh_token: refreshToken }, false);
+          return this.saveSession(pair);
+        } catch (error) {
+          if (error.status !== 401 && error.status !== 403) throw error;
+          wx.removeStorageSync("pet_refresh_token");
+        }
+      }
       const { code } = await new Promise((resolve, reject) =>
         wx.login({
           timeout: 10000,
@@ -19,16 +30,20 @@ App({
       );
       if (!code) throw new Error("微信登录未取得凭证，请重新连接");
       const data = await request("/auth/login", "POST", { code }, false);
-      if (!data || typeof data.token !== "string" || !data.token) {
-        throw new Error("登录未完成，请重新连接");
-      }
-      this.globalData.token = data.token;
       this.globalData.user = data.user;
-      wx.setStorageSync("pet_token", data.token);
-      return data.token;
+      return this.saveSession(data);
     })().finally(() => {
       this.loginPromise = null;
     });
     return this.loginPromise;
   },
+  saveSession(data) {
+    if (!data || typeof data.token !== "string" || !data.token) throw new Error("登录未完成，请重新连接");
+    this.globalData.token = data.token;
+    this.globalData.expiresAt = Number(data.expires_at) || 0;
+    wx.setStorageSync("pet_token", data.token);
+    wx.setStorageSync("pet_token_expires_at", this.globalData.expiresAt);
+    if (data.refresh_token) wx.setStorageSync("pet_refresh_token", data.refresh_token);
+    return data.token;
+  },
 });