feat: add authorization!

app/store/auth.js

@@ -0,0 +1,32 @@
+"use client";
+import { create } from "zustand";
+import { getJWT, setJWT, removeJWT, fetchDataViaGet } from "@/app/api/utils";
+
+export const useUserStore = create((set, get) => ({
+  isAuth: false,
+  user: null,
+  token: null,
+
+  login: (user, token) => {
+    set({ isAuth: true, user, token });
+  },
+  logout: () => {
+    set({ isAuth: false, user: null, token: null });
+    removeJWT();
+  },
+  checkAuth: async () => {
+    const jwt = getJWT();
+    if (jwt) {
+      const data = await fetchDataViaGet(
+        `/api/profile/${jwt.user_id}?token=${jwt.jwt}`
+      );
+      if (data && data.is_my_profile) {
+        get().login(data, jwt.user_id, jwt.jwt);
+      } else {
+        get().logout();
+      }
+    } else {
+      get().logout();
+    }
+  },
+}));