trackoffical_app/lib/service/image.dart

import 'dart:typed_data';
import 'package:dio/dio.dart';
import 'package:get/get.dart';
import 'package:trackoffical_app/service/api.dart';
import '../logger.dart';
import '../model/cache_image.dart';
import '../model/m_net_image.dart';
import 'database.dart';
import '../appcore/ffi.dart' as ffi;


extension NetImageExtension on MNetImage{

  Future<Uint8List> loadMemory({ProgressCallback? onReceiveProgress}) async{
    if(md5.isEmpty){
      return Uint8List(0);
    }

    if (data != null){
      return data!;
    }
    final db = Get.find<DatabaseService>();
    CacheImage? dbImage;

    final md5Hex = this.md5Hex;
    if(md5Hex != null){
      try{
        dbImage = await db.getImage(md5Hex);
      }catch(e){
        warn('加载缓存图片失败:', e);
      }
    }

    if (dbImage != null){
      data = Uint8List.fromList(dbImage.image);
      timestamp = dbImage.timestamp;
      ext=dbImage.ext??'';
      nonce=Uint8List.fromList(dbImage.nonce);
      onReceiveProgress?.call(1, 1);
    }else{
      if(url.isEmpty){
        final image = await ApiService.to.getBinByMd5(md5, onReceiveProgress??(a, b){});
        ext=image.ext;
        data = image.data;
        nonce=image.nonce;
      }else{
        final r = await Dio()
            .get<Uint8List>(
            url,
            options: Options(responseType: ResponseType.bytes), //设置接收类型为二进制数组
            onReceiveProgress: onReceiveProgress
        );
        if (r.data != null){
          data = r.data;
        }else{
          data = Uint8List(0);
        }
      }
      if(data?.isNotEmpty==true){
        if(md5Hex!= null){
          db.saveImage(this);
        }
      }
    }

    if(nonce.isNotEmpty && data!.isNotEmpty){
      debug('解密地图');
      data=await ffi.Crypto(bridge: ffi.api).decrypt(nonce: nonce, data: data!);
      info('解密成功');
    }

    return data!;
  }
}