mymuseum-visitapp/lib/Components/cached_custom_resource.dart

import 'dart:io';
import 'dart:typed_data';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter_pdfview/flutter_pdfview.dart';
import 'package:manager_api_new/api.dart';
import 'package:mymuseum_visitapp/Components/audio_player.dart';
import 'package:mymuseum_visitapp/Components/video_viewer.dart';
import 'package:mymuseum_visitapp/Components/video_viewer_youtube.dart';
import 'package:mymuseum_visitapp/Models/visitContext.dart';
import 'package:mymuseum_visitapp/app_context.dart';
import 'package:path_provider/path_provider.dart';
import 'package:provider/provider.dart';
class CachedCustomResource extends StatelessWidget {
  final ResourceDTO resourceDTO;
  final bool isAuto;
  final bool webView;
  final BoxFit fit;

  CachedCustomResource({
    required this.resourceDTO,
    required this.isAuto,
    required this.webView,
    this.fit = BoxFit.cover,
  });

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

    Color primaryColor = Color(int.parse(visitAppContext.configuration!.primaryColor!.split('(0x')[1].split(')')[0], radix: 16));

    if(resourceDTO.type == ResourceType.ImageUrl || resourceDTO.type == ResourceType.VideoUrl)
    {
      // Image Url or Video Url don't care, just get resource
      if(resourceDTO.type == ResourceType.ImageUrl) {
        return CachedNetworkImage(
          imageUrl:  resourceDTO.url!,
          fit: BoxFit.fill,
          progressIndicatorBuilder: (context, url, downloadProgress) =>
              CircularProgressIndicator(value: downloadProgress.progress, color: primaryColor),
          errorWidget: (context, url, error) => Icon(Icons.error),
        );
      } else {
        if(resourceDTO.url == null) {
          return const Center(child: Text("Error loading video"));
        } else {
          return VideoViewerYoutube(videoUrl: resourceDTO.url!, isAuto: isAuto, webView: webView);
        }
      }
    } else {
      // Check if exist on local storage, if no, just show it via url
      print("Check local storage in cached custom resource");
      return FutureBuilder<File?>(
        future: _checkIfLocalResourceExists(visitAppContext),
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            // Loader ou indicateur de chargement pendant la vérification
            return const CircularProgressIndicator();
          } else if (snapshot.hasError || snapshot.data == null) {
            // Si la ressource locale n'existe pas ou s'il y a une erreur

            switch(resourceDTO.type) {
              case ResourceType.Image :
                return CachedNetworkImage(
                  imageUrl: resourceDTO.url!,
                  fit: fit,
                  placeholder: (context, url) => const CircularProgressIndicator(),
                  errorWidget: (context, url, error) => const Icon(Icons.error),
                );
              case ResourceType.Video :
                return VideoViewer(file: null, videoUrl: resourceDTO.url!);
              case ResourceType.Audio :
                return AudioPlayerFloatingContainer(file: null, audioBytes: null, resourceURl: resourceDTO.url!, isAuto: isAuto);
              case ResourceType.Pdf :
                // PDFView ne lit qu'un fichier local : il faut télécharger d'abord.
                return _RemotePdfView(url: resourceDTO.url!, progressColor: primaryColor);
              default:
                return const Text("Not supported type");
            }
          } else {

            switch(resourceDTO.type) {
              case ResourceType.Image :
                return Image.file(
                  snapshot.data!,
                  fit: fit,
                );
              case ResourceType.Video :
                return VideoViewer(file: snapshot.data!, videoUrl: resourceDTO.url!);
              case ResourceType.Audio :
                return AudioPlayerFloatingContainer(file: snapshot.data!, audioBytes: null, resourceURl: resourceDTO.url!, isAuto: isAuto);
              case ResourceType.Pdf :
                // Déjà téléchargé par la configuration hors ligne : lecture directe.
                return PDFView(filePath: snapshot.data!.path);
              default:
                return const Text("Not supported type");
            }
            // Utilisation de l'image locale

          }
        },
      );
    }
  }

  Future<File?> _checkIfLocalResourceExists(VisitAppContext visitAppContext) async {
    try {
      Directory? appDocumentsDirectory = Platform.isIOS ? await getApplicationDocumentsDirectory() : await getDownloadsDirectory();
      String localPath = appDocumentsDirectory!.path;
      Directory configurationDirectory = Directory('$localPath/${visitAppContext.configuration!.id}');
      List<FileSystemEntity> fileList = configurationDirectory.listSync();

      if(fileList.any((fileL) => fileL.uri.pathSegments.last.contains(resourceDTO.id!))) {
        File file = File(fileList.firstWhere((fileL) => fileL.uri.pathSegments.last.contains(resourceDTO.id!)).path);
        return file;
      }
    } catch(e) {
      print("ERROR _checkIfLocalResourceExists CachedCustomResource");
      print(e);
    }

    return null;
  }

  Future<String> get localPath async {
    Directory? appDocumentsDirectory = Platform.isIOS ? await getApplicationDocumentsDirectory() : await getDownloadsDirectory();
    return appDocumentsDirectory!.path;
  }
}

/// Affiche un PDF distant. `PDFView` n'accepte qu'un chemin de fichier, donc le
/// document est d'abord écrit dans le dossier documents — même approche que
/// `PDFPage`, à laquelle ce widget évite de renvoyer pour un simple média d'étape.
class _RemotePdfView extends StatefulWidget {
  final String url;
  final Color progressColor;

  const _RemotePdfView({required this.url, required this.progressColor});

  @override
  State<_RemotePdfView> createState() => _RemotePdfViewState();
}

class _RemotePdfViewState extends State<_RemotePdfView> {
  late final Future<File> _file = _download();

  Future<File> _download() async {
    final request = await HttpClient().getUrl(Uri.parse(widget.url));
    final response = await request.close();
    final bytes = await consolidateHttpClientResponseBytes(response);
    final directory = await getApplicationDocumentsDirectory();
    final filename = widget.url.substring(widget.url.lastIndexOf("/") + 1);
    final file = File("${directory.path}/$filename");
    return file.writeAsBytes(bytes, flush: true);
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<File>(
      future: _file,
      builder: (context, snapshot) {
        if (snapshot.hasError) {
          return const Center(child: Text("Error loading PDF"));
        }
        if (snapshot.data == null) {
          return Center(
              child: CircularProgressIndicator(color: widget.progressColor));
        }
        return PDFView(filePath: snapshot.data!.path);
      },
    );
  }
}