prs/PRS.Avalonia/PRS.Avalonia/Modules/MyTasks/TaskEditViewModel.cs

using Avalonia.Controls;
using Avalonia.Media;
using Comal.Classes;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using InABox.Avalonia;
using InABox.Avalonia.Components;
using InABox.Avalonia.Dialogs;
using InABox.Core;
using PRS.Avalonia.Components;
using PRS.Avalonia.DigitalForms;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PRS.Avalonia.Modules;

internal partial class TaskEditViewModel : ModuleViewModel
{
    public override string Title => "Task Details";

    [ObservableProperty] 
    private IKanbanShell _shell = null!;

    [ObservableProperty]
    private bool _canEditDescription;

    [ObservableProperty]
    private KanbanTypeModel _kanbanTypes;

    [ObservableProperty]
    private EmployeeModel _employees;

    [ObservableProperty]
    private KanbanDocumentModel _documents;

    [ObservableProperty]
    private KanbanFormModel _forms;

    [ObservableProperty]
    private DigitalFormModel _digitalForms;

    [ObservableProperty]
    private Func<Task>? _takePhotoAction;

    [ObservableProperty]
    private Func<Task>? _browseLibraryAction;

    [ObservableProperty]
    private int _selectedTab;

    private AvaloniaMenuItem SaveButton;
    private AvaloniaMenuItem AddNoteButton;
    private AvaloniaMenuItem ImageMenuButton;
    private AvaloniaMenuItem NewFormButton;

    public TaskEditViewModel()
    {
        SaveButton = new AvaloniaMenuItem(Images.save, Save) { IsVisible = false };
        AddNoteButton = new AvaloniaMenuItem(Images.plus, AddNote) { IsVisible = false };
        ImageMenuButton = new AvaloniaMenuItem(Images.plus, () =>
        {
            var menu = new CoreMenu<IImage>();
            menu.AddItem("Take Photo", TakePhoto);
            menu.AddItem("Browse Library", BrowseLibrary);
            return menu;
        }) { IsVisible = false };
        NewFormButton = new AvaloniaMenuItem(Images.plus, NewForm) { IsVisible = false };
        PrimaryMenu.Add(SaveButton);
        PrimaryMenu.Add(AddNoteButton);
        PrimaryMenu.Add(ImageMenuButton);
        PrimaryMenu.Add(NewFormButton);

        KanbanTypes = new KanbanTypeModel(DataAccess,
            () => new Filter<KanbanType>().All(),
            () => DefaultCacheFileName<KanbanTypeShell>());
        Employees = Repositories.Employees();
        Documents = new KanbanDocumentModel(DataAccess,
            () => new Filter<KanbanDocument>(x => x.EntityLink.ID).IsEqualTo(Shell?.ID ?? CoreUtils.FullGuid),
            () => DefaultCacheFileName<KanbanDocumentShell>(Shell?.ID));
        Forms = new KanbanFormModel(DataAccess,
            () => new Filter<KanbanForm>(x => x.Parent.ID).IsEqualTo(Shell?.ID ?? CoreUtils.FullGuid),
            () => DefaultCacheFileName<KanbanFormShell>(Shell?.ID));

        DigitalForms = Repositories.DigitalForms();
    }

    protected override async Task<TimeSpan> OnRefresh()
    {
        CanEditDescription = Shell.ManagerID == Repositories.Me.ID;
        await Task.WhenAll(
            Documents.RefreshAsync(true),
            Forms.RefreshAsync(true));
        return TimeSpan.Zero;
    }

    public override bool OnBackButtonPressed()
    {
        return ConfirmChanges(Shell);
    }

    partial void OnSelectedTabChanged(int value)
    {
        Changed();
    }

    private async Task<bool> TakePhoto()
    {
        if(TakePhotoAction is not null)
        {
            await TakePhotoAction();
        }
        return true;
    }

    private async Task<bool> BrowseLibrary()
    {
        if(BrowseLibraryAction is not null)
        {
            await BrowseLibraryAction();
        }
        return true;
    }

    private async Task<bool> NewForm()
    {
        var form = await FormsList.SelectForm<KanbanForm, Kanban, KanbanLink>(DigitalForms);
        if (form is null) return true;

        var kanbanForm = Forms.CreateItem();
        kanbanForm.FormID = form.ID;
        kanbanForm.FormCode = form.Code;
        kanbanForm.FormDescription = form.Description;
        kanbanForm.FormDescriptionExpression = form.DescriptionExpression;

        DigitalFormsHostViewModel<KanbanFormModel, KanbanFormShell, Kanban, KanbanLink, KanbanForm>.EditForm(Forms, kanbanForm, Shell.Entity);
        return true;
    }

    private void AddNote()
    {
        Navigation.Navigate<NotesPageViewModel>(model =>
        {
            model.Confirm = note =>
            {
                Shell.Notes = Shell.Notes.Append(note).ToArray();
                Changed();
            };
        });
    }

    private async Task<bool> SendEmail()
    {
        await MessageDialog.ShowMessage("Unimplemented");
        return true;
    }

    private async Task<bool> Save()
    {
        Shell.Save("Saved on Mobile Device");
        await Documents.RefreshAsync(false);
        Changed();
        return true;
    }

    public void Changed()
    {
        var changed = Shell.IsChanged();
        SaveButton.IsVisible = changed;
        AddNoteButton.IsVisible = SelectedTab == 1;
        ImageMenuButton.IsVisible = SelectedTab == 2;
        NewFormButton.IsVisible = SelectedTab == 3;
    }

    [RelayCommand]
    private async Task SelectJob()
    {
        var job = (await SelectionViewModel.ExecutePopup<JobShell>(model =>
        {
            model.Columns.BeginUpdate()
                .Add(new AvaloniaDataGridTextColumn<JobShell>
                {
                    Column = x => x.JobNumber,
                    Caption = "Number",
                    Width = GridLength.Auto
                })
                .Add(new AvaloniaDataGridTextColumn<JobShell>
                {
                    Column = x => x.Name,
                    Caption = "Name",
                    Width = GridLength.Star
                })
                .EndUpdate();
            model.AddFilters(Repositories.Jobs.AvailableFilters.Select(x => x.Name).NotNull());
        }, args =>
        {
            Repositories.Jobs.SelectFilter(args.Filter);
            return Repositories.Jobs.Refresh(args.Force);
        }))?.FirstOrDefault();
        if(job is not null)
        {
            Shell.JobID = job.ID;
            Shell.JobNumber = job.JobNumber;
            Shell.JobName = job.Name;
            Changed();
        }
    }

    [RelayCommand]
    private async Task SelectType()
    {
        var type = (await SelectionViewModel.ExecutePopup<KanbanTypeShell>(model =>
        {
            model.Columns.BeginUpdate()
                .Add(new AvaloniaDataGridTextColumn<KanbanTypeShell>
                {
                    Column = x => x.Description,
                    Caption = "Type",
                    Width = GridLength.Star
                })
                .EndUpdate();
        }, args =>
        {
            return KanbanTypes.Refresh(args.Force);
        }))?.FirstOrDefault();
        if(type is not null)
        {
            Shell.TypeID = type.ID;
            Shell.TypeName = type.Description;
            Changed();
        }
    }

    [RelayCommand]
    private async Task SelectEmployee()
    {
        var employee = (await SelectionViewModel.ExecutePopup<EmployeeShell>(model =>
        {
            model.Columns.BeginUpdate()
                .Add(new AvaloniaDataGridTextColumn<EmployeeShell>
                {
                    Column = x => x.Name,
                    Caption = "Employee",
                    Width = GridLength.Star
                })
                .EndUpdate();
        }, args =>
        {
            return Employees.Refresh(args.Force);
        }))?.FirstOrDefault();
        if(employee is not null)
        {
            Shell.EmployeeID = employee.ID;
            Shell.EmployeeName = employee.Name;
            Changed();
        }
    }

    [RelayCommand]
    private async Task ChangeStatus()
    {
        var status = (await SelectionViewModel.ExecutePopup<KanbanStatus>(model =>
        {
            model.Columns.BeginUpdate()
                .Add(new AvaloniaDataGridTextColumn<KanbanStatus>
                {
                    ColumnName = ".",
                    Caption = "Status",
                    Width = GridLength.Star
                })
                .EndUpdate();
        }, args =>
        {
            return Enum.GetValues<KanbanStatus>();
        }))?.FirstOrDefault();
        if(status is not null)
        {
            Shell.Status = status.Value;
            Changed();
        }
    }

    [RelayCommand]
    private void FormClicked(KanbanFormShell shell)
    {
        DigitalFormsHostViewModel<KanbanFormModel, KanbanFormShell, Kanban, KanbanLink, KanbanForm>.EditForm(Forms, shell, Shell.Entity);
    }
}