etape3

swiftyCompanion/swifty_companion/lib/services/intra_user_service.dart

@@ -0,0 +1,69 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:http/http.dart' as http;
+
+import '../config/intra_config.dart';
+import 'intra_api_exception.dart';
+import 'intra_auth_service.dart';
+
+class IntraUserService {
+  IntraUserService._();
+  static final IntraUserService instance = IntraUserService._();
+
+  final IntraAuthService _auth = IntraAuthService.instance;
+
+  /// Recherche par login — réutilise le token OAuth (pas de nouvel OAuth).
+  Future<Map<String, dynamic>> fetchUserByLogin(String login) async {
+    final trimmed = login.trim();
+    if (trimmed.isEmpty) {
+      throw const IntraApiErrorException('Saisis un login');
+    }
+    if (!_auth.isAuthenticated) {
+      throw const IntraNotAuthenticatedException();
+    }
+
+    final uri = Uri.parse('${IntraConfig.apiBaseUrl}/users').replace(
+      queryParameters: {'filter[login]': trimmed},
+    );
+
+    try {
+      final response = await http.get(uri, headers: _auth.authHeaders());
+      return _parseUserListResponse(response, trimmed);
+    } on IntraApiException {
+      rethrow;
+    } on SocketException {
+      throw const IntraNetworkException();
+    } on http.ClientException {
+      throw const IntraNetworkException();
+    }
+  }
+
+  Map<String, dynamic> _parseUserListResponse(
+    http.Response response,
+    String login,
+  ) {
+    if (response.statusCode == 401) {
+      throw const IntraUnauthorizedException();
+    }
+    if (response.statusCode != 200) {
+      throw IntraApiErrorException(
+        'Erreur API (${response.statusCode})',
+      );
+    }
+
+    final decoded = jsonDecode(response.body);
+    if (decoded is! List) {
+      throw IntraApiErrorException('Réponse API inattendue');
+    }
+    if (decoded.isEmpty) {
+      throw const IntraUserNotFoundException();
+    }
+
+    final user = decoded.first;
+    if (user is! Map<String, dynamic>) {
+      throw IntraApiErrorException('Réponse API inattendue');
+    }
+    return user;
+  }
+}