123 lines
4.2 KiB
Dart
123 lines
4.2 KiB
Dart
import 'package:dio/dio.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:path_provider/path_provider.dart';
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import '../core/network/api_env.dart';
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import '../core/network/api_exception.dart';
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import '../core/network/dio_client.dart';
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import '../models/photo.dart';
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final photoApiProvider = Provider<PhotoApi>((ref) => PhotoApi(ref.watch(dioProvider)));
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/// 照片存档接口。
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///
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/// App 拍完照把**原图**传上来；水印是本地合成的，和这里无关。
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/// 上传是「锦上添花」—— 失败了不该影响用户继续编辑和保存照片，
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/// 所以调用方要自己吞掉异常并给个「重试」入口。
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class PhotoApi {
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PhotoApi(this._dio);
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final Dio _dio;
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/// 上传一张照片，返回后端记录 id
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Future<int?> upload({
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required String filePath,
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double? latitude,
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double? longitude,
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String? address,
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String? weather,
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String? remark,
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DateTime? takenTime,
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}) async {
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try {
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final form = FormData.fromMap({
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'file': await MultipartFile.fromFile(
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filePath,
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filename: _fileName(filePath),
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),
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'latitude': ?latitude,
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'longitude': ?longitude,
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if (address != null && address.isNotEmpty) 'address': address,
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if (weather != null && weather.isNotEmpty) 'weather': weather,
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if (remark != null && remark.isNotEmpty) 'remark': remark,
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if (takenTime != null) 'takenTime': _formatTime(takenTime),
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});
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final res = await _dio.post<dynamic>(
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'/photos',
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data: form,
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// 原图可能有好几 MB，移动网络下给宽一点
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options: Options(receiveTimeout: const Duration(seconds: 60)),
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);
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final data = res.data;
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if (data is Map) {
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final id = data['id'];
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if (id is int) return id;
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}
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return null;
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} on DioException catch (e) {
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final err = e.error;
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throw err is ApiException ? err : ApiException(-1, '照片上传失败');
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}
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}
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/// 分页列表，最新的在前
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Future<PhotoPage> list({int page = 1, int size = 30}) async {
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try {
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final res = await _dio.get<dynamic>(
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'/photos',
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queryParameters: {'page': page, 'size': size},
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);
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final data = res.data;
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if (data is Map<String, dynamic>) return PhotoPage.fromJson(data);
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if (data is Map) return PhotoPage.fromJson(Map<String, dynamic>.from(data));
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return PhotoPage.empty;
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} on DioException catch (e) {
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final err = e.error;
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throw err is ApiException ? err : ApiException(-1, '照片列表加载失败');
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}
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}
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/// 把原图下载到临时文件，返回本地路径。
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///
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/// 「重新打水印」必须先有本地文件：编辑页要读它拿尺寸、显示预览、合成成品。
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/// 原图可能好几 MB，所以留了进度回调让界面能显示进度。
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///
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/// [url] 是后端给的相对地址（`/uploads/...`），这里用 [resolveAssetUrl]
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/// 补成绝对地址 —— `/uploads` 不在 `/api` 前缀下，不能直接丢给 dio。
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Future<String> downloadOriginal(
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String url, {
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void Function(int received, int total)? onProgress,
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}) async {
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try {
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final dir = await getTemporaryDirectory();
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final path = '${dir.path}/photo_${DateTime.now().millisecondsSinceEpoch}.jpg';
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await _dio.download(
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resolveAssetUrl(url),
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path,
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onReceiveProgress: onProgress,
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// 原图几 MB，移动网络下给宽一点
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options: Options(receiveTimeout: const Duration(seconds: 120)),
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);
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return path;
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} on DioException catch (e) {
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final err = e.error;
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throw err is ApiException ? err : ApiException(-1, '原图下载失败');
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}
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}
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/// 从路径里取个带扩展名的文件名，后端靠它判断文件类型
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static String _fileName(String path) {
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final normalized = path.replaceAll('\\', '/');
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final name = normalized.substring(normalized.lastIndexOf('/') + 1);
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return name.isEmpty ? 'photo.jpg' : name;
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}
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static String _formatTime(DateTime time) {
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String two(int n) => n.toString().padLeft(2, '0');
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return '${time.year}-${two(time.month)}-${two(time.day)} '
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'${two(time.hour)}:${two(time.minute)}:${two(time.second)}';
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}
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}
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