ErsatzTV/ErsatzTV/Shared/MediaCardPager.razor

@using System.Globalization
<div style="display: flex; flex-direction: row; margin-bottom: auto; margin-top: auto; width: 100%" class="ml-6 mr-6">
    @if (IsSelectMode())
    {
        <div style="align-items: center; display: flex; width: 100%;">
            <div style="flex: 1;">
                <MudText Typo="Typo.h6" Color="Color.Primary">@SelectionLabel()</MudText>
            </div>
            <div style="margin-left: auto" class="d-none d-md-flex">
                <MudButton Variant="Variant.Filled"
                           Color="Color.Primary"
                           StartIcon="@Icons.Material.Filled.Add"
                           OnClick="@(_ => AddSelectionToCollection())">
                    Add To Collection
                </MudButton>
                <MudButton Class="ml-3"
                           Variant="Variant.Filled"
                           Color="Color.Primary"
                           StartIcon="@Icons.Material.Filled.PlaylistAdd"
                           OnClick="@(_ => AddSelectionToPlaylist())">
                    Add To Playlist
                </MudButton>
                <MudButton Class="ml-3"
                           Variant="Variant.Filled"
                           Color="Color.Secondary"
                           StartIcon="@Icons.Material.Filled.Check"
                           OnClick="@(_ => ClearSelection())">
                    Clear Selection
                </MudButton>
            </div>
            <div style="align-items: center; display: flex; margin-left: auto;" class="d-md-none">
                <div class="flex-grow-1"></div>
                <MudMenu Icon="@Icons.Material.Filled.MoreVert">
                    <MudMenuItem Icon="@Icons.Material.Filled.Add" Label="Add To Collection" OnClick="@AddSelectionToCollection"/>
                    <MudMenuItem Icon="@Icons.Material.Filled.PlaylistAdd" Label="Add To Playlist" OnClick="AddSelectionToPlaylist"/>
                    <MudMenuItem Icon="@Icons.Material.Filled.Check" Label="Clear Selection" OnClick="ClearSelection"/>
                </MudMenu>
            </div>
        </div>
    }
    else
    {
        <div style="align-items: center; display: flex; width: 100%">
            <div style="flex: 1">
                <MudText Class="d-none d-md-flex">@Query</MudText>
            </div>
            <div style="display: flex; justify-content: center;">
                <MudPaper Style="align-items: center; display: flex; justify-content: center;">
                    <MudIconButton Icon="@Icons.Material.Outlined.ChevronLeft"
                                   OnClick="@PrevPage"
                                   Disabled="@(PageNumber <= 1)">
                    </MudIconButton>
                    <MudText Style="flex-grow: 1"
                             Align="Align.Center">
                        @PaddedString(Math.Min((PageNumber - 1) * PageSize + 1, TotalCount), TotalCount) - @PaddedString(Math.Min(TotalCount, PageNumber * PageSize), TotalCount) of @TotalCount
                    </MudText>
                    <MudIconButton Icon="@Icons.Material.Outlined.ChevronRight"
                                   OnClick="@NextPage" Disabled="@(PageNumber * PageSize >= TotalCount)">
                    </MudIconButton>
                </MudPaper>
            </div>
            <div style="flex: 1; display: flex; justify-content: flex-end;">
                @if (SelectAllOnPage is not null)
                {
                    <MudButton Variant="Variant.Filled"
                               Color="Color.Primary"
                               Disabled="@(CanSelectAllOnPage?.Invoke() != true)"
                               StartIcon="@Icons.Material.Filled.SelectAll"
                               OnClick="@(_ => SelectAllOnPage())">
                        Select All
                    </MudButton>
                }
            </div>
        </div>
    }
</div>

@code {

    [Parameter]
    public string Query { get; set; }

    [Parameter]
    public int PageNumber { get; set; }

    [Parameter]
    public int PageSize { get; set; }

    [Parameter]
    public int TotalCount { get; set; }

    [Parameter]
    public EventCallback PrevPage { get; set; }

    [Parameter]
    public EventCallback NextPage { get; set; }

    [Parameter]
    public Func<bool> IsSelectMode { get; set; }

    [Parameter]
    public Func<string> SelectionLabel { get; set; }

    [Parameter]
    public Func<Task> AddSelectionToCollection { get; set; }

    [Parameter]
    public Func<Task> AddSelectionToPlaylist { get; set; }

    [Parameter]
    public Action ClearSelection { get; set; }

    [Parameter]
    public Func<bool> CanSelectAllOnPage { get; set; }

    [Parameter]
    public Action SelectAllOnPage { get; set; }

    private static MarkupString PaddedString(int value, int maximum)
    {
        int length = maximum.ToString(CultureInfo.InvariantCulture).Length;
        return (MarkupString)value.ToString(CultureInfo.InvariantCulture).PadLeft(length, ' ').Replace(" ", "&nbsp;");
    }

}