81 lines
2.4 KiB
Dart
81 lines
2.4 KiB
Dart
import 'dart:convert';
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import 'package:http/http.dart' as http;
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/// Result of a registration API call.
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class RegistrationResult {
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final bool success;
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final bool isDuplicate;
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final String? errorMessage;
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final Map<String, dynamic>? duplicateInfo;
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RegistrationResult({
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required this.success,
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this.isDuplicate = false,
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this.errorMessage,
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this.duplicateInfo,
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});
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factory RegistrationResult.ok() =>
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RegistrationResult(success: true);
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factory RegistrationResult.duplicate(Map<String, dynamic> info) =>
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RegistrationResult(success: false, isDuplicate: true, duplicateInfo: info);
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factory RegistrationResult.error(String message) =>
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RegistrationResult(success: false, errorMessage: message);
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}
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class ApiService {
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final http.Client _client;
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final Duration timeout;
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ApiService({http.Client? client, this.timeout = const Duration(seconds: 5)})
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: _client = client ?? http.Client();
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/// Submit a shelf registration (上架登记).
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Future<RegistrationResult> registerLocation({
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required String baseUrl,
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required String zongpaiNo,
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required String locationCode,
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}) async {
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final uri = Uri.parse('$baseUrl/CargoTrace/location');
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try {
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final response = await _client
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.post(
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uri,
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headers: {'Content-Type': 'application/json'},
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body: jsonEncode({
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'zongpai_no': zongpaiNo,
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'location_code': locationCode,
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}),
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)
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.timeout(timeout);
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switch (response.statusCode) {
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case 200:
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return RegistrationResult.ok();
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case 409:
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final body = jsonDecode(response.body) as Map<String, dynamic>;
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return RegistrationResult.duplicate(body);
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default:
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final body = jsonDecode(response.body) as Map<String, dynamic>;
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final msg = body['error'] ?? body['message'] ?? 'Unknown error (${response.statusCode})';
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return RegistrationResult.error(msg.toString());
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}
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} catch (e) {
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return RegistrationResult.error('网络异常，请检查网络连接');
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}
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}
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/// Test connectivity by making a HEAD request to the base URL.
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Future<bool> testConnection(String baseUrl) async {
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try {
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final uri = Uri.parse(baseUrl);
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final response = await _client.head(uri).timeout(timeout);
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return response.statusCode < 500;
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} catch (_) {
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return false;
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}
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}
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}
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