HopFrame/src/HopFrame.Web/Pages/Administration/AdminPageList.razor

@page "/administration/{url}"
@layout AdminLayout
@rendermode InteractiveServer

@using System.ComponentModel
@using BlazorStrap
@using Microsoft.AspNetCore.Components.Web
@using HopFrame.Web.Admin.Models
@using HopFrame.Web.Admin.Providers
@using HopFrame.Web.Pages.Administration.Layout
@using static Microsoft.AspNetCore.Components.Web.RenderMode
@using HopFrame.Web.Components.Administration
@using BlazorStrap.V5
@using CurrieTechnologies.Razor.SweetAlert2
@using HopFrame.Database.Repositories
@using HopFrame.Security.Claims
@using HopFrame.Web.Admin
@using HopFrame.Web.Components

<PageTitle>@_pageData.Title</PageTitle>
<AuthorizedView Permission="@_pageData.Permissions.Read" RedirectIfUnauthorized="@GenerateRedirectString()" />

<AdminPageModal ReloadDelegate="Reload" @ref="_modal"/>

<div class="title">
    <h3>
        @_pageData.Title administration
        <span class="reload" @onclick="Reload">
            <HopIconDisplay Type="HopIconDisplay.HopIcon.Reload"/>
        </span>
    </h3>

    <div class="d-flex" role="search" id="search">
        <input class="form-control me-2 input-dark" type="search" placeholder="Search" aria-label="Search" @oninput="TriggerSearch">
    </div>
    <AuthorizedView Permission="@_pageData.Permissions.Create">
        <BSButton IsSubmit="false" Color="BSColor.Success" @onclick="Create">Add Entry</BSButton>
    </AuthorizedView>
</div>

<BSTable IsStriped="true" IsHoverable="true" IsDark="true" Color="BSColor.Dark">
    <BSTHead>
        <BSTR>
            @foreach (var prop in GetListingProperties()) {
                <BSTD>
                    @if (prop.Sortable) {
                        <span class="sorter" @onclick="() => OrderBy(prop.Name)">@prop.DisplayName</span>
                        @if (_currentSortProperty == prop.Name) {
                            <HopIconDisplay Type="_currentSortDirection == ListSortDirection.Descending ? HopIconDisplay.HopIcon.ArrowDown : HopIconDisplay.HopIcon.ArrowUp"/>
                        }
                    }
                    else {
                        @prop.DisplayName
                    }
                </BSTD>
            }
            
            @if (_hasEditPermission || _hasDeletePermission) {
                <BSTD>Actions</BSTD>
            }
        </BSTR>
    </BSTHead>

    <BSTBody>
        @foreach (var entry in _displayedModels) {
            <BSTR>
                @foreach (var prop in GetListingProperties()) {
                    @if (prop.Bold) {
                        <BSTD Class="bold">
                            @GetPrintableValue(entry, prop)
                        </BSTD>
                    }
                    else {
                        <BSTD>
                            @GetPrintableValue(entry, prop)
                        </BSTD>
                    }
                }

                @if (_hasEditPermission || _hasDeletePermission) {
                    <BSTD>
                        <BSButtonGroup>
                            @if (_hasEditPermission) {
                                <BSButton Color="BSColor.Warning" OnClick="() => Edit(entry)">Edit</BSButton>
                            }

                            @if (_hasDeletePermission) {
                                <BSButton Color="BSColor.Danger" OnClick="() => Delete(entry)">Delete</BSButton>
                            }
                        </BSButtonGroup>
                    </BSTD>
                }
            </BSTR>
        }
    </BSTBody>
</BSTable>

<style>
    .bold {
        font-weight: bold;
    }
</style>

@inject IAdminPagesProvider Pages
@inject IServiceProvider Provider
@inject ITokenContext Auth
@inject IPermissionRepository Permissions
@inject SweetAlertService Alerts
@inject NavigationManager Navigator

@code {
    [Parameter]
    public string Url { get; set; }

    private AdminPage _pageData;
    private IModelProvider _modelProvider;
    private IEnumerable<object> _modelBuffer;
    private AdminPageModal _modal;

    private bool _hasEditPermission;
    private bool _hasDeletePermission;

    private string _currentSortProperty;
    private ListSortDirection _currentSortDirection;
    private DateTime _lastSearch;
    private IList<object> _displayedModels;

    protected override async Task OnInitializedAsync() {
        _pageData = Pages.LoadAdminPage(Url);

        if (_pageData is null) {
            Navigator.NavigateTo("/administration", true);
            return;
        }

        _currentSortProperty = _pageData.DefaultSortPropertyName;
        _currentSortDirection = _pageData.DefaultSortDirection;
        
        if (_pageData.RepositoryProvider is null)
            throw new ArgumentException($"AdminPage '{_pageData.Title}' does not specify a model repository!'");
        _modelProvider = _pageData.LoadModelProvider(Provider);

        _hasEditPermission = _pageData.Permissions.Update is null || await Permissions.HasPermission(Auth.User, _pageData.Permissions.Update);
        _hasDeletePermission = _pageData.Permissions.Delete is null || await Permissions.HasPermission(Auth.User, _pageData.Permissions.Delete);
        
        await Reload();
    }

    private IList<AdminPageProperty> GetListingProperties() {
        return _pageData.Properties
            .Where(p => p.Ignore == false)
            .Where(p => p.DisplayInListing)
            .ToList();
    }

    private async Task Reload() {
        _modelBuffer = await _modelProvider.ReadAllO();
        _displayedModels = _modelBuffer.ToList();
        
        _currentSortDirection = _pageData.DefaultSortDirection;
        OrderBy(_pageData.DefaultSortPropertyName, false);
        StateHasChanged();
    }

    private void OrderBy(string property, bool changeDir = true) {
        if (_currentSortProperty == property && changeDir)
            _currentSortDirection = (ListSortDirection)(((int)_currentSortDirection + 1) % 2);
        if (_currentSortProperty != property)
            _currentSortDirection = ListSortDirection.Ascending;
        
        var prop = GetListingProperties()
            .SingleOrDefault(p => p.Name == property);
        var comparer = Comparer<object>.Create((x, y) => {
            if (prop?.Type == typeof(DateTime)) {
                DateTime dateX = (DateTime) x.GetType().GetProperty(prop.Name)?.GetValue(x)!;
                DateTime dateY = (DateTime) y.GetType().GetProperty(prop.Name)?.GetValue(y)!;

                return DateTime.Compare(dateX, dateY);
            }

            var propX = GetPrintableValue(x, prop);
            var propY = GetPrintableValue(y, prop);

            return String.CompareOrdinal(propX, propY);
        });

        _displayedModels = _currentSortDirection == ListSortDirection.Ascending ? _displayedModels.Order(comparer).ToList() : _displayedModels.OrderDescending(comparer).ToList();
        
        _currentSortProperty = property;
    }

    private void TriggerSearch(ChangeEventArgs e) {
        var search = ((string)e.Value)?.Trim();
        Search(search);
    }

    private async void Search(string search) {
        _lastSearch = DateTime.Now;
        await Task.Delay(500);
        var timeSinceLastKeyPress = DateTime.Now - _lastSearch;
        if (timeSinceLastKeyPress < TimeSpan.FromMilliseconds(500)) return;

        if (string.IsNullOrWhiteSpace(search)) {
            _displayedModels = _modelBuffer.ToList();
        }
        else {
            var props = GetListingProperties();

            _displayedModels = _modelBuffer
                .Where(model => props.Any(prop => GetPrintableValue(model, prop).Contains(search)))
                .ToList();
        }
        
        OrderBy(_currentSortProperty, false);
        StateHasChanged();
    }

    private string GetPrintableValue(object element, AdminPageProperty prop) {
        return _modal?.MapPropertyValue(prop.GetValue(element), prop);
    }

    private async void Create() {
        await _modal.Show(_pageData);
    }

    private async void Edit(object entry) {
        await _modal.Show(_pageData, entry);
    }

    private async void Delete(object entry) {
        var result = await Alerts.FireAsync(new SweetAlertOptions {
            Title = "Are you sure?",
            Text = "You won't be able to revert this!",
            Icon = SweetAlertIcon.Warning,
            ConfirmButtonText = "Yes",
            ShowCancelButton = true,
            ShowConfirmButton = true
        });

        if (result.IsConfirmed) {
            await _modelProvider.DeleteO(entry);
            await Reload();
            
            await Alerts.FireAsync(new SweetAlertOptions {
                Title = "Deleted!",
                Icon = SweetAlertIcon.Success,
                Timer = 1500,
                ShowConfirmButton = false
            });
        }
    }

    private string GenerateRedirectString() {
        return "/administration/login?redirect=" + _pageData?.Url;
    }
}