prs/prs.mobile.new/PRS.Mobile/CustomControls/PDFViewer/PDFList.xaml.cs

using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using InABox.Mobile;
using Xamarin.Essentials;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using XF.Material.Forms.UI.Dialogs;
using Document = InABox.Core.Document;
using PRSSecurity = InABox.Core.Security;

namespace PRS.Mobile
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class PDFList
    {
        
        public IList<IDocumentShell> Documents { get; set; }
        
        public bool AllowUpload { get; set; }
        public bool AllowPrintShare { get; set; }
        public bool AllowView { get; set; }
        public bool AllowDelete { get; set; }

        public PDFList()
        {
            InitializeComponent();
        }

        protected override void OnAppearing()
        {
            _documents.ItemsSource = Documents;
            _upload.IsVisible = AllowUpload;
            base.OnAppearing();
            
        }
        
        // private DocShell AssignIcon(DocShell shell)
        // {
        //     if (shell.FileName.ToLower().EndsWith("pdf"))
        //         shell.ImageSource = "pdficon;
        //     else if (shell.FileName.ToLower().EndsWith("docx") || shell.FileName.ToLower().EndsWith("doc"))
        //         shell.ImageSource = "worddoc;
        //     else if (shell.FileName.ToLower().EndsWith("png") || shell.FileName.ToLower().EndsWith("jpg"))
        //         shell.ImageSource = "productimage;
        //     return shell;
        // }
        
        private async void Upload_Clicked(object sender, EventArgs e)
        {
            // var result = await FilePicker.PickAsync(new PickOptions { FileTypes = FilePickerFileType.Pdf });
            // if (result != null)
            // {
            //     using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Saving"))
            //     {
            //         string fileName = $"File Name: {result.FileName}";
            //         var stream = await result.OpenReadAsync();
            //         var memoryStream = new MemoryStream();
            //         stream.CopyTo(memoryStream);
            //         var data = memoryStream.ToArray();
            //         var doc = new Document { FileName = fileName, Data = data };
            //         new Client<Document>().Save(doc, "Uploaded from mobile device");
            //         pDFShells.Add(new DocShell { FileName = fileName, DocID = doc.ID });
            //         pdfListView.ItemsSource = null;
            //         pdfListView.ItemsSource = pDFShells;
            //         SaveEntityDoc(doc.ID);
            //     }
            // }
        }

        // private void SaveEntityDoc(Guid docID)
        // {
        //     if (Entity is EmployeeQualification)
        //     {
        //         EmployeeQualificationDocument empDoc = new EmployeeQualificationDocument();
        //         empDoc.DocumentLink.ID = docID;
        //         empDoc.EntityLink.ID = Entity.ID;
        //         new Client<EmployeeQualificationDocument>().Save(empDoc, "Upload from mobile device");
        //     }
        //     if (Entity is Notification)
        //     {
        //         NotificationDocument notificationDoc = new NotificationDocument();
        //         notificationDoc.DocumentLink.ID = docID;
        //         notificationDoc.EntityLink.ID = Entity.ID;
        //         new Client<NotificationDocument>().Save(notificationDoc, "Upload from mobile device");
        //     }
        // }

        // private async void List_Tapped(object sender, EventArgs e)
        // {
        //     DocShell shell = pdfListView.SelectedItem as DocShell;
        //     if (!bAllowView)
        //     {
        //         DisplayAlert("Alert", "Opening is not allowed from this module", "OK");
        //         return;
        //     }
        //
        //     if (bAllowDelete)
        //     {
        //         string chosenOption = await DisplayActionSheet("Choose an option", "Cancel", null, "View", "Delete File");
        //         switch (chosenOption)
        //         {
        //             case "Cancel":
        //                 return;
        //             default:
        //                 return;
        //             case "View":
        //                 OpenDocViewer(shell);
        //                 break;
        //             case "Delete File":
        //                 ConfirmDelete(shell);
        //                 break;
        //         }
        //     }
        //     else
        //     {
        //         OpenDocViewer(shell);
        //     }
        // }
        //
        // private async void ConfirmDelete(DocShell shell)
        // {
        //     string chosenOption = await DisplayActionSheet("Confirm Delete?", "Cancel", null, "Yes", "No");
        //     switch (chosenOption)
        //     {
        //         case "Cancel":
        //             return;
        //         default:
        //             return;
        //         case "No":
        //             return;
        //         case "Yes":
        //             using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Working"))
        //             {
        //                 pDFShells.Remove(shell);
        //                 pdfListView.ItemsSource = null;
        //                 pdfListView.ItemsSource = pDFShells;
        //                 Document document = new Document { ID = shell.DocID };
        //                 DeleteEntityDocument(shell.DocID);
        //                 new Client<Document>().Delete(document, "Deleted from mobile device");
        //             }
        //             break;
        //     }
        // }
        //
        // void DeleteEntityDocument(Guid id)
        // {
        //     if (Entity is EmployeeQualification)
        //     {
        //         CoreTable table = new Client<EmployeeQualificationDocument>().Query(new Filter<EmployeeQualificationDocument>(x => x.DocumentLink.ID).IsEqualTo(id),
        //             new Columns<EmployeeQualificationDocument>(x => x.ID));
        //         EmployeeQualificationDocument empDoc = new EmployeeQualificationDocument();
        //         empDoc.ID = Guid.Parse(table.Rows.First().Values[0].ToString());
        //         new Client<EmployeeQualificationDocument>().Delete(empDoc, "Deleted from mobile device");
        //     }
        // }

        void OpenDocViewer(DocShell shell)
        {
            shell.FileName = shell.FileName.ToLower();
            if (shell.FileName.EndsWith("pdf"))
            {
                if (Device.RuntimePlatform.Equals(Device.Android) && PRSSecurity.IsAllowed<CanOpenMobileNativePDFViewer>())
                    OpenNativeViewer(shell);
                else
                {
                    PDFViewer viewer = new PDFViewer(shell.DocID) { AllowPrintShare = this.AllowPrintShare };
                    Navigation.PushAsync(viewer);
                }
            }
            else if (shell.FileName.EndsWith("docx") || shell.FileName.EndsWith("doc"))
            {
                CoreTable table = new Client<Document>().Query(new Filter<Document>(x => x.ID).IsEqualTo(shell.DocID),
                    new Columns<Document>(ColumnTypeFlags.None).Add(x => x.Data));
                Document doc = table.Rows.First().ToObject<Document>();
                MemoryStream memoryStream = new MemoryStream(doc.Data);
                DisplayAlert("Error", "Word documents not available at this time", "OK");
            }
            else if (shell.FileName.EndsWith("png") || shell.FileName.EndsWith("jpg") || shell.FileName.EndsWith("jpeg"))
            {
                CoreTable table = new Client<Document>().Query(new Filter<Document>(x => x.ID).IsEqualTo(shell.DocID),
                        new Columns<Document>(ColumnTypeFlags.None).Add(x => x.Data));
                Document doc = table.Rows.First().ToObject<Document>();
                ImageSource src = ImageSource.FromStream(() => new MemoryStream(doc.Data));
                ImageViewerPage viewer = new ImageViewerPage(src, null);
                Navigation.PushAsync(viewer);
            }
        }

        private async void OpenNativeViewer(DocShell shell)
        {
            CoreTable table = new Client<Document>().Query(new Filter<Document>(x => x.ID).IsEqualTo(shell.DocID));
            Document doc = table.Rows.First().ToObject<Document>();

            var filePath = Path.Combine(FileSystem.AppDataDirectory, doc.FileName);

            File.WriteAllBytes(filePath, doc.Data);

            await Launcher.OpenAsync(new OpenFileRequest
            {
                File = new ReadOnlyFile(filePath)
            });
        }
        
        private async void PDF_Clicked(object sender, EventArgs e)
        {
            await MaterialDialog.Instance.AlertAsync("Not Implemented Yet!");
        }

    }

    public class DocShell
    {
        public string FileName { get; set; }
        public Guid DocID { get; set; }
        public ImageSource ImageSource { get; set; }
        public double FirstRowHeight { get; set; }
        public string Type { get; set; }
        public double ImageHeightRequest { get; set; }
        public double ImageWidthRequest { get; set; }
        public double ColumnWidth { get; set; }
        public double ImageRow { get; set; }
        public double ImageRowSpan { get; set; }
        public byte[] ThumbNail { get; set; }
        public double TypeColumn { get; set; }
        public double TypeColumnSpan { get; set; }
        public string FileDetails { get; set; }
        public bool ExpandVisible { get; set; }
        public DocShell()
        {
            FileName = "";
            DocID = Guid.Empty;
            ImageSource = "";
            FirstRowHeight = 0;
            Type = "";
            ImageHeightRequest = 30;
            ImageWidthRequest = 30;
            ColumnWidth = 40;
            ImageRow = 1;
            ImageRowSpan = 1;
            TypeColumn = 0;
            TypeColumnSpan = 2;
            FileDetails = "";
            ExpandVisible = false;
        }
    }
}