Implement login, add useUser hook

hooks/useUser.ts

@@ -0,0 +1,35 @@
+import GetUserSchema from '@/services/user/schema/GetUserSchema';
+import APIResponseValidationSchema from '@/validation/APIResponseValidationSchema';
+import useSWR from 'swr';
+
+const useUser = () => {
+  const {
+    data: user,
+    error,
+    isLoading,
+  } = useSWR('/api/users/current', async (url) => {
+    const response = await fetch(url);
+
+    if (!response.ok) {
+      throw new Error(response.statusText);
+    }
+
+    const json = await response.json();
+
+    const parsed = APIResponseValidationSchema.safeParse(json);
+    if (!parsed.success) {
+      throw new Error(parsed.error.message);
+    }
+
+    const parsedPayload = GetUserSchema.safeParse(parsed.data.payload);
+    if (!parsedPayload.success) {
+      throw new Error(parsedPayload.error.message);
+    }
+
+    return parsedPayload.data;
+  });
+
+  return { user, isLoading, error: error as unknown };
+};
+
+export default useUser;