Initial commit

flutter_app/lib/services/api_client.dart

@@ -0,0 +1,71 @@
+import "dart:convert";
+import "package:http/http.dart" as http;
+import "../config/api_config.dart";
+
+class ApiClient {
+  final http.Client _client;
+
+  ApiClient({http.Client? client}) : _client = client ?? http.Client();
+
+  Uri _uri(String path, [Map<String, dynamic>? query]) {
+    return Uri.parse(ApiConfig.baseUrl).replace(
+      path: path,
+      queryParameters: query?.map((key, value) => MapEntry(key, "$value")),
+    );
+  }
+
+  Future<List<dynamic>> getList(
+    String path, {
+    Map<String, dynamic>? query,
+  }) async {
+    final response = await _client.get(_uri(path, query));
+    _ensureSuccess(response);
+    return jsonDecode(response.body) as List<dynamic>;
+  }
+
+  Future<Map<String, dynamic>> getMap(
+    String path, {
+    Map<String, dynamic>? query,
+  }) async {
+    final response = await _client.get(_uri(path, query));
+    _ensureSuccess(response);
+    return jsonDecode(response.body) as Map<String, dynamic>;
+  }
+
+  Future<Map<String, dynamic>> post(
+    String path,
+    Map<String, dynamic> body,
+  ) async {
+    final response = await _client.post(
+      _uri(path),
+      headers: {"Content-Type": "application/json"},
+      body: jsonEncode(body),
+    );
+    _ensureSuccess(response);
+    return jsonDecode(response.body) as Map<String, dynamic>;
+  }
+
+  Future<Map<String, dynamic>> put(
+    String path,
+    Map<String, dynamic> body,
+  ) async {
+    final response = await _client.put(
+      _uri(path),
+      headers: {"Content-Type": "application/json"},
+      body: jsonEncode(body),
+    );
+    _ensureSuccess(response);
+    return jsonDecode(response.body) as Map<String, dynamic>;
+  }
+
+  Future<void> delete(String path) async {
+    final response = await _client.delete(_uri(path));
+    _ensureSuccess(response);
+  }
+
+  void _ensureSuccess(http.Response response) {
+    if (response.statusCode < 200 || response.statusCode >= 300) {
+      throw Exception("Request failed: ${response.statusCode}");
+    }
+  }
+}