Client/lib/screen/pages/files/fileElement.dart

import 'dart:developer';
import 'dart:io';

import 'package:better_open_file/better_open_file.dart';
import 'package:filesize/filesize.dart';
import 'package:flowder/flowder.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:jiffy/jiffy.dart';
import 'package:marianum_mobile/api/marianumcloud/webdav/queries/listFiles/cacheableFile.dart';
import 'package:marianum_mobile/screen/pages/files/files.dart';
import 'package:marianum_mobile/widget/confirmDialog.dart';
import 'package:marianum_mobile/widget/unimplementedDialog.dart';
import 'package:path_provider/path_provider.dart';

import '../../../api/marianumcloud/webdav/webdavApi.dart';

class FileElement extends StatefulWidget {
  final CacheableFile file;
  final List<String> path;
  final void Function() refetch;
  const FileElement(this.file, this.path, this.refetch, {Key? key}) : super(key: key);

  static Future<DownloaderCore> download(String remotePath, String name, Function(double) onProgress, Function(OpenResult) onDone) async {
    Directory paths = await getApplicationDocumentsDirectory();

    String local = paths.path + Platform.pathSeparator + name;

    DownloaderUtils options = DownloaderUtils(
      progressCallback: (current, total) {
        final progress = (current / total) * 100;
        onProgress(progress);
      },
      file: File(local),
      progress: ProgressImplementation(),
      deleteOnCancel: true,
      onDone: () {
        Future<OpenResult> result = OpenFile.open(local);

        result.then((value) => {
          onDone(value)
        });
      },
    );

    return await Flowder.download(
      "${await WebdavApi.webdavConnectString}$remotePath",
      options,
    );
  }

  @override
  State<FileElement> createState() => _FileElementState();
}

class _FileElementState extends State<FileElement> {
  double percent = 0;
  Future<DownloaderCore>? downloadCore;

  Widget getSubtitle() {
    if(widget.file.currentlyDownloading) {
      return Row(
        children: [
          Container(
            margin: const EdgeInsets.only(right: 10),
            child: const Text("Download:"),
          ),
          Expanded(
            child: LinearProgressIndicator(value: percent/100),
          ),
          Container(
            margin: const EdgeInsets.only(left: 10),
            child: Text("${percent.round()}%"),
          ),
        ],
      );
    }
    return widget.file.isDirectory ? Text("geändert ${Jiffy.parseFromDateTime(widget.file.modifiedAt ?? DateTime.now()).fromNow()}") : Text("${filesize(widget.file.size)}, ${Jiffy.parseFromDateTime(widget.file.modifiedAt ?? DateTime.now()).fromNow()}");
  }

  @override
  Widget build(BuildContext context) {
    return ListTile(
      leading: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [Icon(widget.file.isDirectory ? Icons.folder_outlined : Icons.description_outlined)],
      ),
      title: Text(widget.file.name),
      subtitle: getSubtitle(),
      trailing: Icon(widget.file.isDirectory ? Icons.arrow_right : null),
      onTap: () {
        if(widget.file.isDirectory) {
          Navigator.of(context).push(MaterialPageRoute(
            builder: (context) {
              return Files(widget.path.toList()..add(widget.file.name));
            },
          ));
        } else {
          if(widget.file.currentlyDownloading) {
            showDialog(context: context, builder: (context) {
              return AlertDialog(
                title: const Text("Download abbrechen?"),
                content: const Text("Möchtest du den Download abbrechen?"),
                actions: [
                  TextButton(onPressed: () {
                    Navigator.of(context).pop();
                  }, child: const Text("Nein")),
                  TextButton(onPressed: () {
                    downloadCore?.then((value) {
                      if(!value.isCancelled) value.cancel();
                      Navigator.of(context).pop();
                    });
                    setState(() {
                      widget.file.currentlyDownloading = false;
                      percent = 0;
                      downloadCore = null;
                    });
                  }, child: const Text("Ja, Abbrechen"))
                ],
              );
            });

            return;
          }

          setState(() {
            widget.file.currentlyDownloading = true;
          });

          log("Download: ${widget.file.path} to ${widget.file.name}");

          downloadCore = FileElement.download(widget.file.path, widget.file.name, (progress) {
            setState(() => percent = progress);
          }, (result) {
            if(result.type != ResultType.done) {
              showDialog(context: context, builder: (context) {
                return AlertDialog(
                  title: const Text("Download"),
                  content: Text(result.message),
                );
              });
            }

            setState(() {
              widget.file.currentlyDownloading = false;
              percent = 0;
            });
          });

        }
      },
      onLongPress: () {
        showDialog(context: context, builder: (context) {
          return SimpleDialog(
            children: [
              ListTile(
                leading: const Icon(Icons.delete_outline),
                title: const Text("Löschen"),
                onTap: () {
                  Navigator.of(context).pop();
                  showDialog(context: context, builder: (context) => ConfirmDialog(
                    title: "Element löschen?",
                    content: "Das Element wird unwiederruflich gelöscht.",
                    onConfirm: () {
                      WebdavApi.webdav
                          .then((value) => value.delete(widget.file.path))
                          .then((value) => widget.refetch());
                    }
                  ));
                },
              ),
              ListTile(
                leading: const Icon(Icons.share_outlined),
                title: const Text("Teilen"),
                onTap: () {
                  Navigator.of(context).pop();
                  UnimplementedDialog.show(context);
                },
              )
            ],
          );
        });
      },
    );
  }
}