tangheem/lib/ui/screens/pdf_viewer_screen.dart

import 'dart:async';
import 'dart:io';
import 'dart:ui';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:shared_storage/shared_storage.dart';
import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
import 'package:tangheem/api/tangheem_user_api_client.dart';
import 'package:tangheem/app_state/app_state.dart';
import 'package:tangheem/classes/colors.dart';
import 'package:tangheem/classes/consts.dart';
import 'package:tangheem/classes/utils.dart';
import 'package:tangheem/extensions/int_extensions.dart';
import 'package:tangheem/extensions/string_extensions.dart';
import 'package:tangheem/extensions/widget_extensions.dart';
import 'package:tangheem/models/content_info_model.dart';
import 'package:tangheem/ui/misc/no_data_ui.dart';
import 'package:tangheem/widgets/new/CommonHeader.dart';

class PdfListScreen extends StatefulWidget {
  static const String routeName = "/tangheem_pdf";

  PdfListScreen({Key key}) : super(key: key);

  @override
  _PdfListScreenState createState() {
    return _PdfListScreenState();
  }
}

class _PdfListScreenState extends State<PdfListScreen> {
  List<ContentInfoDataModel> contentList;
  List<ContentInfoDataModel> haqooqAlMosasa;

  @override
  void initState() {
    super.initState();
    haqooqAlMosasa = AppState().haqooqAlMosasa;
    getPdfs();
  }

  void getPdfs() async {
    Utils.showLoading(context);
    try {
      List<ContentInfoModel> responseList = await Future.wait([TangheemUserApiClient().getContentInfo(8), if (haqooqAlMosasa == null) TangheemUserApiClient().getContentInfo(1)]);
      contentList = responseList[0].data ?? [];
      if (haqooqAlMosasa == null) {
        haqooqAlMosasa = responseList[1].data ?? [];
        AppState().haqooqAlMosasa = haqooqAlMosasa;
      }
    } catch (ex) {
      contentList = [];
      haqooqAlMosasa = [];
      if (mounted) Utils.handleException(ex, null);
    } finally {
      Utils.hideLoading(context);
    }
    setState(() {});
  }

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

  void startFileDownload(String url, String fileName) async {
    try {
      Utils.showLoading(context);
      String path = await Utils.getStoragePath(fileName);
      Utils.downloadFile(ApiConsts.baseUrl + url, path, onResponse: (isSuccess) {
        Utils.hideLoading(context);
        if (isSuccess) {
          Utils.showToast("تم حفظ الملف بنجاح");
        } else {
          Utils.showToast("فشل حفظ الملف ، حاول مرة أخرى");
        }
      });
    } catch (ex) {
      print(ex);
      Utils.hideLoading(context);
    }
  }

  Future<bool> _requestStoragePermission() async {
    Map<Permission, PermissionStatus> statuses = await [Permission.storage].request();
    return statuses[Permission.storage].isGranted;
  }

  @override
  Widget build(BuildContext context) {
    bool isPortrait = MediaQuery.of(context).orientation == Orientation.portrait;

    Widget _header = SizedBox(height: isPortrait ? null : double.infinity, width: double.infinity, child: CommonHeader("التصفح والتحميل", "assets/icons/new/pdf_bg.jpg", Color(0xffAE8646)));

    Widget _dataListView = contentList?.isEmpty ?? true
        ? NoDataUI()
        : ListView.separated(
            physics: isPortrait ? const NeverScrollableScrollPhysics() : const AlwaysScrollableScrollPhysics(),
            shrinkWrap: isPortrait,
            padding: EdgeInsets.only(left: isPortrait ? 35 : 0, right: isPortrait ? 35 : 24, top: 35, bottom: 0),
            itemCount: contentList.length,
            separatorBuilder: (context, index) {
              return Divider(color: Color(0xffC7C7C7), height: 1, thickness: 1).paddingOnly(top: 14, bottom: 14);
            },
            itemBuilder: (context, index) {
              return SizedBox(
                height: 50,
                child: Row(
                  children: [
                    SvgPicture.asset(
                      "assets/icons/new/download_pdf.svg",
                      width: 44,
                      height: 50,
                    ).onPress(() async {
                      if (Platform.isAndroid && (await DeviceInfoPlugin().androidInfo).version.sdkInt > 29) {
                        savePdfToAboveAndroid32(contentList[index].exposeFilePath, contentList[index].fileName);
                      } else {
                        if (await _requestStoragePermission()) {
                          startFileDownload(contentList[index].exposeFilePath, contentList[index].fileName);
                        } else {
                          Utils.showToast("يجب أن تعطي الإذن للتنزيل.");
                        }
                      }
                    }),
                    7.width,
                    ClipRRect(
                      borderRadius: BorderRadius.circular(7),
                      child: Container(
                        height: 50,
                        alignment: Alignment.centerRight,
                        decoration: BoxDecoration(
                          color: Colors.white,
                        ),
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
                          children: [
                            Container(
                              width: 44,
                              height: 50,
                              alignment: Alignment.center,
                              decoration: BoxDecoration(
                                color: ColorConsts.darkText,
                              ),
                              child: Column(
                                mainAxisSize: MainAxisSize.min,
                                children: [
                                  Icon(Icons.zoom_out_map_rounded, color: Colors.white),
                                  "تصفع".toText(10),
                                ],
                              ),
                            ),
                            Directionality(
                              textDirection: TextDirection.rtl,
                              child: (contentList[index].fileName?.trim() ?? "").toText(18, color: ColorConsts.darkText).paddingOnly(left: 12, right: 12),
                            ).expanded,
                          ],
                        ),
                      ),
                    ).onPress(() {
                      Navigator.pushNamed(context, PdfViewerScreen.routeName, arguments: contentList[index]);
                    }).expanded,
                  ],
                ),
              );
            },
          );

    Widget _aboutView = Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        "حقوق الموسوعة".toText(isPortrait ? 13 : 16, color: ColorConsts.greyLightColor),
        for (ContentInfoDataModel text in haqooqAlMosasa) text.content.toText(13, color: ColorConsts.greyLightColor, textAlign: TextAlign.center)
      ],
    );
    return SizedBox(
      height: double.infinity,
      child: isPortrait
          ? SingleChildScrollView(
              physics: const AlwaysScrollableScrollPhysics(),
              padding: EdgeInsets.only(bottom: 140),
              child: Column(
                children: [
                  _header,
                  contentList == null ? SizedBox() : _dataListView,
                  if ((haqooqAlMosasa?.length ?? 0) > 0) _aboutView.paddingOnly(left: 35, right: 35, top: 35),
                ],
              ),
            )
          : Row(
              children: [
                Expanded(child: ((haqooqAlMosasa?.length ?? 0) > 0) ? _aboutView.paddingOnly(left: 35, right: isPortrait ? 35 : 24, top: isPortrait ? 35 : 24) : SizedBox(), flex: 3),
                Expanded(child: contentList == null ? SizedBox() : _dataListView, flex: 3),
                Expanded(child: _header, flex: 4),
              ],
            ),
    );
  }

  void savePdfToAboveAndroid32(String pathUrl, String fileName) async {
    List<UriPermission> _persistedPermissionUris = await persistedUriPermissions();
    if (_persistedPermissionUris.isNotEmpty) {
      UriPermission permissionUri = _persistedPermissionUris.first;
      startFileDownloadAboveAndroid32(pathUrl, fileName, permissionUri.uri);
    } else {
      Uri selectedDocumentUris = await openDocumentTree();
      if (selectedDocumentUris == null) return;
      savePdfToAboveAndroid32(pathUrl, fileName);
    }
  }

  void startFileDownloadAboveAndroid32(String url, String fileName, Uri persistentUri) async {
    try {
      Utils.showLoading(context);
      //String path = await Utils.getStoragePath(fileName);
      Utils.downloadFileAboveAndroid32(ApiConsts.baseUrl + url, "path", onResponse: (bytes) async {
        Utils.hideLoading(context);
        if (bytes.isNotEmpty) {
          final documentFile = await persistentUri.toDocumentFile();
          final child = await documentFile?.child(fileName);
          if (child == null) {
            documentFile?.createFileAsBytes(
              mimeType: 'application/pdf ',
              bytes: bytes,
              displayName: fileName,
            );
          } else {
            documentFile?.writeToFileAsBytes(
              bytes: bytes,
              mode: FileMode.write,
            );
          }

          Utils.showToast("تم حفظ الملف بنجاح");
        } else {
          Utils.showToast("فشل حفظ الملف ، حاول مرة أخرى");
        }
      });
    } catch (ex) {
      print(ex);
      Utils.hideLoading(context);
    }
  }
}

class PdfViewerScreen extends StatelessWidget {
  static const String routeName = "/tangheem_pdf_view";
  final ContentInfoDataModel pdfDetail;

  PdfViewerScreen(this.pdfDetail, {Key key}) : super(key: key);

  final GlobalKey<SfPdfViewerState> _pdfViewerKey = GlobalKey();

  @override
  Widget build(BuildContext context) {
    return SfPdfViewer.network(
      ApiConsts.baseUrl + pdfDetail.exposeFilePath,
      key: _pdfViewerKey,
      canShowScrollHead: false,
      enableTextSelection: false,
      enableDocumentLinkAnnotation: false,
      canShowPaginationDialog: false,
      canShowScrollStatus: false,
      pageSpacing: 0,
      // pageLayoutMode:PdfPageLayoutMode.single
    );
  }
}