cloudsolutions-atoms/lib/views/widgets/images/files_list.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:open_file/open_file.dart';
import 'package:test_sa/extensions/int_extensions.dart';
import 'package:test_sa/extensions/widget_extensions.dart';
import 'package:test_sa/views/app_style/sizing.dart';
import 'package:test_sa/views/widgets/buttons/app_back_button.dart';
import 'package:test_sa/views/widgets/loaders/image_loader.dart';
import 'package:url_launcher/url_launcher.dart';

import 'image_item.dart';
import 'images_viewer.dart';

class FilesList extends StatelessWidget {
  final List<String> images;
  final EdgeInsets padding;

  const FilesList({Key key, this.images, this.padding}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return GridView.builder(
      padding: const EdgeInsets.only(top: 16, bottom: 16),
      physics: const NeverScrollableScrollPhysics(),
      shrinkWrap: true,
      gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 6, mainAxisSpacing: 8, crossAxisSpacing: 8),
      itemCount: images?.length ?? 0,
      itemBuilder: (context, itemIndex) {
        if (images[itemIndex] == null || !images[itemIndex].contains(".")) {
          return Text("Bad\nFile");
        }
        var isImage = images[itemIndex].split(".").last.toLowerCase() == "png" || images[itemIndex].split(".").last.toLowerCase() == "jpg" || images[itemIndex].split(".").last.toLowerCase() == "jpeg";
        var isPdf = images[itemIndex].split(".").last.toLowerCase() == "pdf";
        var isExcel = images[itemIndex].split(".").last.toLowerCase() == "xlsx";

        return Container(
          decoration: ShapeDecoration(
            color: Colors.white,
            shape: RoundedRectangleBorder(
              side: const BorderSide(width: 1, color: Color(0xFFEAF1F4)),
              borderRadius: BorderRadius.circular(8),
            ),
          ),
          child: ClipRRect(
            borderRadius: BorderRadius.circular(8),
            child: (isImage
                ? (_isLocalUrl(images[itemIndex])
                    ? Image.file(File(images[itemIndex]))
                    : ImageLoader(
                        url: images[itemIndex],
                        boxFit: BoxFit.cover,
                        height: 48,
                        width: 48,
                      ))
                : Image.asset("assets/images/${isPdf ? "pdf" : isExcel ? "excel" : "doc"}.png")),
          ),
        ).onPress(() async {
          if (isImage) {
            Navigator.of(context).push(
              MaterialPageRoute(
                builder: (_) => Scaffold(
                  body: SafeArea(
                    child: Stack(
                      children: [
                        InteractiveViewer(child: Image(image: (_isLocalUrl(images[itemIndex]) ? FileImage(File(images[itemIndex])) : NetworkImage(images[itemIndex])))).center,
                        const ABackButton(),
                      ],
                    ),
                  ),
                ),
              ),
            );
          } else if (_isLocalUrl(images[itemIndex])) {
            OpenFile.open(images[itemIndex]);
          } else {
            try {
              if (!await launchUrl(Uri.parse(images[itemIndex]), mode: LaunchMode.externalApplication)) {
                Fluttertoast.showToast(msg: "UnExpected Error with file.");
                throw Exception('Could not launch ');
              }
            } catch (ex) {
              Fluttertoast.showToast(msg: "No Viewer found.");
            }
          }
        });
      },
    );

    return ListView.separated(
        padding: padding ?? EdgeInsets.symmetric(horizontal: 32 * AppStyle.getScaleFactor(context)),
        scrollDirection: Axis.horizontal,
        itemCount: images?.length ?? 0,
        separatorBuilder: (context, itemIndex) => 8.width,
        itemBuilder: (context, itemIndex) {
          if (images[itemIndex] == null || !images[itemIndex].contains(".")) {
            return Text("Bad\nFile");
          }
          var isImage =
              images[itemIndex].split(".").last.toLowerCase() == "png" || images[itemIndex].split(".").last.toLowerCase() == "jpg" || images[itemIndex].split(".").last.toLowerCase() == "jpeg";
          var isPdf = images[itemIndex].split(".").last.toLowerCase() == "pdf";
          var isExcel = images[itemIndex].split(".").last.toLowerCase() == "xlsx";

          return (isImage
                  ? (_isLocalUrl(images[itemIndex])
                      ? Image.file(File(images[itemIndex]))
                      : ImageLoader(
                          url: images[itemIndex],
                          boxFit: BoxFit.cover,
                        ))
                  : Image.asset("assets/images/${isPdf ? "pdf" : isExcel ? "excel" : "doc"}.png"))
              .onPress(() async {
            if (isImage) {
              Navigator.of(context).push(
                MaterialPageRoute(
                  builder: (_) => Scaffold(
                    body: SafeArea(
                      child: Stack(
                        children: [
                          InteractiveViewer(child: Image(image: (_isLocalUrl(images[itemIndex]) ? FileImage(File(images[itemIndex])) : NetworkImage(images[itemIndex])))).center,
                          const ABackButton(),
                        ],
                      ),
                    ),
                  ),
                ),
              );
            } else if (_isLocalUrl(images[itemIndex])) {
              OpenFile.open(images[itemIndex]);
            } else {
              try {
                if (!await launchUrl(Uri.parse(images[itemIndex]), mode: LaunchMode.externalApplication)) {
                  Fluttertoast.showToast(msg: "UnExpected Error with file.");
                  throw Exception('Could not launch ');
                }
              } catch (ex) {
                Fluttertoast.showToast(msg: "No Viewer found.");
              }
            }
          });
        });
  }

  bool _isLocalUrl(String url) {
    if (url?.isEmpty != false) return false;
    return url.startsWith("/") || url.startsWith("file://") || url.substring(1).startsWith(':\\');
  }
}