prs/PRS.Avalonia/PRS.Avalonia/Modules/SubmitDocs/SubmitDocsEditorViewModel.cs

using CommunityToolkit.Mvvm.ComponentModel;
using InABox.Avalonia;
using InABox.Avalonia.Components;
using InABox.Avalonia.Platform;
using InABox.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PRS.Avalonia.Modules;

internal partial class SubmitDocsEditorViewModel : ModuleViewModel
{
    public override string Title => "Document Editor";

    [ObservableProperty]
    private DataEntryDocumentShell _dataEntryDocument = null!;

    [ObservableProperty]
    public DocumentShell? _document;

    [ObservableProperty]
    private DocumentModel? _documentModel;

    [ObservableProperty]
    private Func<byte[]>? _getImage;

    [ObservableProperty]
    private bool _imageChanged;

    public SubmitDocsEditorViewModel()
    {
        PrimaryMenu.Add(new AvaloniaMenuItem(Images.save, Save));
    }

    protected override Task OnActivated()
    {
        DocumentModel = new DocumentModel(DataAccess,
            () => new Filter<Document>(x => x.ID).IsEqualTo(DataEntryDocument.DocumentID),
            () => DefaultCacheFileName<DocumentShell>(DataEntryDocument.DocumentID));
        return Task.CompletedTask;
    }

    protected override async Task<TimeSpan> OnRefresh()
    {
        await DocumentModel!.RefreshAsync(false);

        Document = DocumentModel.FirstOrDefault();

        return TimeSpan.Zero;
    }

    public override bool OnBackButtonPressed()
    {
        DataEntryDocument.Cancel();
        return base.OnBackButtonPressed();
    }

    private async Task<bool> Save()
    {
        ProgressVisible = true;

        if (ImageChanged && GetImage is not null && Document is not null)
        {
            var imgData = GetImage();
            Document.Data = imgData;
            Document.CRC = CoreUtils.CalculateCRC(imgData);
            Document.TimeStamp = DateTime.Now;
            await DocumentModel!.SaveAsync("Updated from Mobile Device");

            DataEntryDocument.Thumbnail = PlatformTools.ImageTools.CreateThumbnail(imgData, 256, 256);
        }

        await DataEntryDocument.SaveAsync("Updated from Mobile Device");

        ProgressVisible = false;

        Navigation.Back();

        return true;
    }
}