TourIAm/TIAMSharedUI/Shared/Components/Grids/TiamGrid.cs

using System.ComponentModel;
using AyCode.Core.Helpers;
using AyCode.Interfaces.Entities;
using AyCode.Services.SignalRs;
using AyCode.Utils.Extensions;
using DevExpress.Blazor;
using DevExpress.Blazor.Internal;
using DevExpress.Blazor.Navigation.Internal;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Forms;
using TIAMWebApp.Shared.Application.Services;
using TIAMWebApp.Shared.Application.Utility;

namespace TIAMSharedUI.Shared.Components.Grids
{
    public class TiamGrid<TDataItem> : DxGrid where TDataItem : class, IEntityGuid
    {
        protected bool IsFirstInitializeParameters;
        private IList<TDataItem>? _dataSource;
        private string _gridLogName;

        public TiamGrid() : base()
        { }

        [Parameter] public LoggerClient Logger { get; set; }
        [Parameter] public string GridName { get; set; }
        [Parameter] public AcSignalRClientBase SignalRClient { get; set; }

        [Parameter] public int GetAllMessageTag { get; set; }
        [Parameter] public int GetItemMessageTag { get; set; }
        [Parameter] public int AddMessageTag { get; set; }
        [Parameter] public int UpdateMessageTag { get; set; }
        [Parameter] public int RemoveMessageTag { get; set; }

        protected new EventCallback<GridDataItemDeletingEventArgs> DataItemDeleting { get; set; }
        [Parameter] public EventCallback<GridDataItemDeletingEventArgs> OnDataItemDeleting{ get; set; }

        protected new EventCallback<GridEditModelSavingEventArgs> EditModelSaving { get; set; }
        [Parameter] public EventCallback<GridEditModelSavingEventArgs> OnDataItemSaving { get; set; }

        [Parameter] public EventCallback<IList<TDataItem>> OnDataSourceChanged { get; set; }
        [Parameter] public EventCallback<TDataItem> OnDataItemChanging { get; set; }
        [Parameter] public EventCallback<TDataItem> OnDataItemChanged { get; set; }

        [Parameter]
        [DefaultValue(null)]
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Usage", "BL0007:Component parameters should be auto properties", Justification = "<Pending>")]
        public IList<TDataItem>? DataSource
        {
            get
            {
                if (_dataSource == null && Data != null)
                {
                    Logger.Error($"{_gridLogName} Use the DataSource parameter instead of Data!");
                    throw new NullReferenceException($"{_gridLogName} Use the DataSource parameter instead of Data!");
                }

                return _dataSource;
            }
            set
            {
                _dataSource = value;
                Data = _dataSource;

                OnDataSourceChanged.InvokeAsync(_dataSource);
            }
        }

        protected override void OnInitialized()
        {
            if (Logger == null)
                throw new NullReferenceException($"[{GetType().Name}] Logger == null");

            if (SignalRClient == null)
                Logger.Error($"[{GetType().Name}] SignalRClient == null");

            base.OnInitialized();
        }

        protected override async Task OnAfterRenderAsync(bool firstRender)
        {
            await base.OnAfterRenderAsync(firstRender);

            if (firstRender && DataSource == null) RefreshDataSourceAsync().Forget();
        }

        public Task AddDataItem(TDataItem dataItem) => PostDataToServerAsync(dataItem, AddMessageTag);
        public Task UpdateDataItem(TDataItem dataItem) => PostDataToServerAsync(dataItem, UpdateMessageTag);
        public Task RemoveDataItem(TDataItem dataItem) => PostDataToServerAsync(dataItem, RemoveMessageTag);

        public Task RemoveDataItem(Guid id)
        {
            var dataItem = _dataSource.FirstOrDefault(x => x.Id == id);

            return dataItem == null ? Task.CompletedTask : RemoveDataItem(dataItem);
        }

        private async Task OnItemSaving(GridEditModelSavingEventArgs e)
        {
            var dataItem = (e.EditModel as TDataItem)!;

            var logText = e.IsNew ? "add" : "update";
            Logger.Info($"{_gridLogName} OnItemSaving {logText}; Id: {dataItem.Id}");

            await OnDataItemSaving.InvokeAsync(e);

            if (e.Cancel)
            {
                Logger.Debug($"{_gridLogName} OnItemSaving {logText} canceled; Id: {dataItem.Id}");
                return;
            }

            if (e.IsNew) await AddDataItem(dataItem);
            else await UpdateDataItem(dataItem);
        }

        private async Task OnItemDeleting(GridDataItemDeletingEventArgs e)
        {
            Logger.Info($"{_gridLogName} OnItemDeleting");

            await OnDataItemDeleting.InvokeAsync(e);

            if (e.Cancel)
            {
                Logger.Debug($"{_gridLogName} OnItemDeleting canceled");
                return;
            }
            
            var dataItem = (e.DataItem as TDataItem)!;
            await RemoveDataItem(dataItem);
        }

        public virtual Task RefreshDataSourceAsync()
        {
            if (GetAllMessageTag == 0) return Task.CompletedTask;

            Logger.Info($"{_gridLogName} UpdateAllDataAsync called");

            return SignalRClient.GetAllAsync<IList<TDataItem>>(GetAllMessageTag, response =>
            {
                if (response.Status == SignalResponseStatus.Error)
                    return;

                BeginUpdate();
                DataSource = response.ResponseData ?? [];
                EndUpdate();

                InvokeAsync(StateHasChanged).Forget();
            });
        }

        protected virtual async Task PostDataToServerAsync(TDataItem dataItem, int messageTag, bool isDelete = false)
        {
            await OnDataItemChanging.InvokeAsync(dataItem);

            if (messageTag == 0) return;

            Logger.Info($"{_gridLogName} PostDataToServerAsync called; transferId " + dataItem.Id);

            if (dataItem.Id.IsNullOrEmpty()) dataItem.Id = Guid.NewGuid();

            RefreshDataItem(dataItem, isDelete); //egyből látszódik a változás a grid-ben, nem csak a callback lefutásakor! felhasználóbarátabb... - J.

            SignalRClient.PostDataAsync(messageTag, dataItem, async repsonse =>
            {
                if (repsonse.Status != SignalResponseStatus.Success || repsonse.ResponseData == null || !RefreshDataItem(repsonse.ResponseData, isDelete))
                {
                    RefreshDataSourceAsync().Forget();
                    return;
                }

                await OnDataItemChanged.InvokeAsync(dataItem);
                InvokeAsync(StateHasChanged).Forget();
            }).Forget();

            //transfer = await devAdminSignalClient.PostDataAsync(SignalRTags.UpdateTransferAsync, transfer);
        }

        protected virtual bool RefreshDataItem(TDataItem dataItem, bool isDelete)
        {
            if (dataItem.Id.IsNullOrEmpty())
            {
                Logger.Error($"{_gridLogName} dataItem.Id.IsNullOrEmpty()");
                return false;
            }

            var transferIndex = _dataSource.FindIndex(x => x.Id == dataItem.Id);

            if (isDelete && transferIndex > -1) _dataSource.RemoveAt(transferIndex);
            else
            {
                if (transferIndex > -1) _dataSource[transferIndex] = dataItem;
                else _dataSource.Add(dataItem);
            }

            return true;
        }

        protected override Task SetParametersAsyncCore(ParameterView parameters)
        {
            if (!IsFirstInitializeParameters)
            {
                base.DataItemDeleting = EventCallback.Factory.Create<GridDataItemDeletingEventArgs>(this, OnItemDeleting);
                base.EditModelSaving = EventCallback.Factory.Create<GridEditModelSavingEventArgs>(this, OnItemSaving);
                
                //ShowFilterRow = true;
                //PageSize = 4;
                //ShowGroupPanel = true;
                //AllowSort = false;

                IsFirstInitializeParameters = true;
            }

            return base.SetParametersAsyncCore(parameters);
        }

        protected override void OnParametersSet()
        {
            base.OnParametersSet();

            if (GridName.IsNullOrWhiteSpace()) GridName = $"{typeof(TDataItem).Name}Grid";

            _gridLogName = $"[{GridName}]";

        }
    }
}