tablet-app/lib/Services/downloadService.dart

import 'dart:convert';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:manager_api/api.dart';
import 'package:provider/provider.dart';
import 'package:tablet_app/Models/tabletContext.dart';
import 'package:tablet_app/app_context.dart';
import 'package:flutter/foundation.dart';
import 'package:http/http.dart' as http;
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';

class DownloadConfigurationWidget extends StatefulWidget {
  DownloadConfigurationWidget();

  @override
  State<DownloadConfigurationWidget> createState() => _DownloadConfigurationWidgetState();
}

class _DownloadConfigurationWidgetState extends State<DownloadConfigurationWidget> {
  int? nbrResources;
  ValueNotifier<int> currentResourceIndex = ValueNotifier<int>(0);

  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    super.dispose();
  }

  Future<bool> download(BuildContext buildContext, TabletAppContext tabletAppContext) async {
    bool isAllLanguages = true;

    ExportConfigurationDTO? exportConfigurationDTO;
    try{
      print(tabletAppContext.configuration!.id!);
      print("essai");

      // Retrieve all url from resource to download (get all resource from configuration en somme)
      exportConfigurationDTO = await tabletAppContext.clientAPI!.configurationApi!.configurationExport(tabletAppContext.configuration!.id!);
    } catch(e) {
      print("Erreur lors du téléchargement de la configuration et de ses ressources !");
      print(e);
      return false;
    }

    print("COUCUO heeere");
    print(exportConfigurationDTO);
    print(exportConfigurationDTO.resources!.length);

    exportConfigurationDTO.resources!.forEach((element) {
      print(element.id);
      print(element.label);
    });


    if(exportConfigurationDTO != null && exportConfigurationDTO.resources != null && exportConfigurationDTO.resources!.isNotEmpty) {
      nbrResources = exportConfigurationDTO.resources!.where((resource) => resource.type != ResourceType.ImageUrl && resource.type != ResourceType.VideoUrl && resource.url != null).length;

      print("i'm here");
      print(nbrResources);
      Directory? appDocumentsDirectory = await getDownloadsDirectory();
      String localPath = appDocumentsDirectory!.path;

      print(localPath);

      Map<Permission, PermissionStatus> statuses = await [
        Permission.storage,
      ].request();

      print(statuses[Permission.storage]);
      print(statuses);

      if(statuses[Permission.storage] == PermissionStatus.granted) {

        try{
          Directory directory = Directory('$localPath');
          List<FileSystemEntity> allConfigurations = directory.listSync();

          for (var file in allConfigurations) {
            print('file.uri.pathSegments');
            print(file.uri.pathSegments);
            print('file.uri.pathSegments.last');
            print(file.uri.pathSegments.last);
          }

          Directory configurationDirectory = Directory('$localPath/${tabletAppContext.configuration!.id}');

          if(!allConfigurations.any((configurationDirectory) => configurationDirectory.uri.pathSegments.any((element) => element == tabletAppContext.configuration!.id))) {
            // create directory
            configurationDirectory.createSync(recursive: true);
            print('Répertoire créé avec succès.');
          } else {
            print('EXISTE D2J0 NIGAUD.');
          }

          List<FileSystemEntity> fileList = configurationDirectory.listSync();

          print("HERE LIST in directory");

          for (var file in fileList) {
            print(file.uri.pathSegments.last);
          }

          // foreach ou on va tout télécharger - avec un joli etape 0 / length - on peut rendre tout lent on s'en fou ça ne ce fait qu'une fois
          exportConfigurationDTO.resources!.forEach((resource) async {

            if(fileList.any((fileL) => fileL.uri.pathSegments.last.contains(resource.id!))) {
              print("Already exist TRIPLE NIGAUD!");
              currentResourceIndex.value++;
            } else {
              if(resource.type != ResourceType.ImageUrl && resource.type != ResourceType.VideoUrl && resource.url != null) {
                bool success = await downloadResource(tabletAppContext, resource, localPath);

                if (success) {
                  currentResourceIndex.value++;
                }
              }
            }
          });
        } catch(e) {
          print("ERRORRRR");
          print(e);
          return false;
        }
      } else {
        return false;
      }
    }

    // Puis après faudra changer tous les appels à une resourceUrl avec un get local de la resource
    return true;
  }

  @override
  Widget build(BuildContext context) {
    final appContext = Provider.of<AppContext>(context);
    TabletAppContext tabletAppContext = appContext.getContext();
    Size size = MediaQuery.of(context).size;

    return Column(
      children: [
        FutureBuilder(future: download(context, tabletAppContext), builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            // Loader ou indicateur de chargement pendant la vérification
            return Center(child: CircularProgressIndicator());
          } else {
            return Text("Mise à jour finie");
          }
        }),
        ValueListenableBuilder<int>(
            valueListenable: currentResourceIndex,
            builder: (context, value, _) {
              return Center(
                child: Text(
                  value.toString()+'/'+nbrResources.toString(),
                  style: TextStyle(fontSize: 15, fontWeight: FontWeight.w500),
                ),
              );
            }
        ),
      ],
    );
  }
}

Future<bool> downloadResource(TabletAppContext tabletAppContext, ResourceDTO resourceDTO, String localPath) async {
  try {
    // Téléchargement de la ressource depuis l'URL
    http.Response response = await http.get(Uri.parse(resourceDTO.url!));

    if (response.statusCode == 200) {
      // Vérification de l'en-tête Content-Type
      String contentType = response.headers["content-type"] ?? "";

      // Déduction de l'extension en fonction du Content-Type
      String extension = _getExtensionFromContentType(contentType);

      print("LOCAL PATTH");
      print(localPath);

      File file = File('$localPath/${tabletAppContext.configuration!.id}/${resourceDTO.id}.$extension');

      // Écriture du contenu téléchargé dans le fichier local
      await file.writeAsBytes(response.bodyBytes);

      return true;
    } else {
      print("Échec du téléchargement de la ressource - ${response.statusCode}");
      return false;
    }
  } catch (e) {
    print("Erreur lors du téléchargement de la ressource !");
    print(e);
    return false;
  }
}

String _getExtensionFromContentType(String contentType) {
  Map<String, String> contentTypeToExtension = {
    "image/jpeg": "jpg",
    "image/jpg": "jpg",
    "image/png": "png",
    "image/gif": "gif",
    "audio/mp3": "mp3",
    "video/mp4": "mp4",
    "video/webm": "webm",
    "video/avi": "avi",
    "video/quicktime": "mov",
    "application/pdf": "pdf",
    "application/json": "json"
  };

  return contentTypeToExtension[contentType] ?? "unknown";
}