server logic frontend

mobile/lib/main.dart

@@ -16,6 +16,7 @@ void main() {
 }
 
 class MyApp extends StatelessWidget {
+  final apiUrl = "10.135.51.114:8080/api";
   const MyApp({super.key});
 
   @override

mobile/lib/repos/product.dart

@@ -1,10 +1,9 @@
-import 'dart:convert';
-
 import 'package:flutter/material.dart';
-import 'package:http/http.dart' as http;
 import 'package:mobile/models/coordinate.dart';
 import 'package:mobile/models/product.dart';
 import 'package:mobile/results.dart';
+import 'package:mobile/server/client.dart';
+import 'package:mobile/server/server.dart';
 
 class ProductRepo extends ChangeNotifier {
   int _nextId = 0;
@@ -141,7 +140,7 @@ class ProductRepo extends ChangeNotifier {
 }
 
 class ProductRepoByServer extends ChangeNotifier {
-  String apiUrl = "http://127.0.0.1:8080/products.json";
+  final client = BackendServer();
   List<Product> products = [];
   String query = "";
   ProductRepoByServer() {
@@ -149,12 +148,11 @@ class ProductRepoByServer extends ChangeNotifier {
   }
 
   Future<void> fetchProductsFromServer() async {
-    final res = await http.get(
+    final res = client.allProducts();
-      Uri.parse(apiUrl),
+    if (res is Error) {
-    );
+      return;
-    final productsJson = List<Map<String, dynamic>>.from(jsonDecode(res.body));
+    }
-    products =
+    products = (res as Success<List<Product>>).data;
-        productsJson.map(((product) => Product.fromJson(product))).toList();
     notifyListeners();
   }
 

mobile/lib/server/client.dart

@@ -0,0 +1,70 @@
+import 'dart:convert';
+
+import 'package:http/http.dart' as http;
+import 'package:mobile/models/product.dart';
+import 'package:mobile/server/server.dart';
+
+class BackendServer implements Server {
+  final _apiUrl = "10.135.51.114:8080/api";
+
+  Future<http.Response> _post(
+      {required String endpoint, required Map<String, dynamic> body}) async {
+    final encoded = json.encode(body);
+    return await http.post(
+      Uri.parse("$_apiUrl/$endpoint"),
+      body: encoded,
+      headers: {"Content-Type": "application/json"},
+    );
+  }
+
+  @override
+  Future<Response<List<Product>>> allProducts() async {
+    final res = await http
+        .get(
+          Uri.parse("$_apiUrl/products/all"),
+        )
+        .then((res) => json.decode(res.body));
+    if (res["ok"]) {
+      return Error(message: res["message"]);
+    } else {
+      return Success(
+          data: res.map(((product) => Product.fromJson(product))).toList());
+    }
+  }
+
+  @override
+  Future<Response<Null>> register(
+    String name,
+    String email,
+    String password,
+  ) async {
+    final res = await _post(
+      endpoint: "users/register",
+      body: {"name": name, "email": email, "password": password},
+    ).then((res) => json.decode(res.body));
+
+    if (res["ok"]) {
+      return Success(data: null);
+    } else {
+      return Error(message: res["message"]);
+    }
+  }
+
+  @override
+  Future<Response<Null>> login(
+    String name,
+    String email,
+    String password,
+  ) async {
+    final res = await _post(
+      endpoint: "auth/login",
+      body: {"email": email, "password": password},
+    ).then((res) => json.decode(res.body));
+
+    if (res["ok"]) {
+      return Success(data: null);
+    } else {
+      return Error(message: res["message"]);
+    }
+  }
+}

mobile/lib/server/server.dart

@@ -0,0 +1,29 @@
+import 'package:mobile/models/product.dart';
+
+abstract class Server {
+  Future<Response<List<Product>>> allProducts();
+
+  Future<Response<Null>> register(
+    String name,
+    String email,
+    String password,
+  );
+
+  Future<Response<Null>> login(
+    String name,
+    String email,
+    String password,
+  );
+}
+
+sealed class Response<Data> {}
+
+class Success<Data> extends Response<Data> {
+  Data data;
+  Success({required this.data});
+}
+
+class Error<Data> extends Response<Data> {
+  String message;
+  Error({required this.message});
+}