RackPeek/Shared.Rcl/Components/MarkdownEditor.razor

<div class="border border-zinc-800 rounded p-4 bg-zinc-900"
     data-testid="@BaseTestId">

    @if (ShowActionButtons)
    {
        <div class="flex justify-end gap-3 mb-2 text-xs"
             data-testid="@($"{BaseTestId}-actions")">

            <button class="text-emerald-400 hover:text-emerald-300 transition"
                    data-testid="@($"{BaseTestId}-save")"
                    @onclick="HandleSave">
                Save
            </button>

            <button class="text-zinc-500 hover:text-zinc-300 transition"
                    data-testid="@($"{BaseTestId}-cancel")"
                    @onclick="HandleCancel">
                Cancel
            </button>
        </div>
    }

    <textarea
        class="w-full h-64 bg-zinc-950 text-zinc-200 border border-zinc-700 rounded p-3 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-emerald-500"
        data-testid="@($"{BaseTestId}-textarea")"
        @bind="_text"
        @bind:event="oninput"
        @bind:after="NotifyChanged">
    </textarea>

</div>

@code {
    [Parameter] public string? Value { get; set; }
    [Parameter] public EventCallback<string?> ValueChanged { get; set; }

    [Parameter] public bool ShowActionButtons { get; set; } = true;

    [Parameter] public EventCallback OnSave { get; set; }
    [Parameter] public EventCallback OnCancel { get; set; }

    [Parameter] public string? TestIdPrefix { get; set; }

    private string BaseTestId =>
        string.IsNullOrWhiteSpace(TestIdPrefix)
            ? "markdown-editor"
            : $"{TestIdPrefix}-markdown-editor";

    private string? _text;

    protected override void OnParametersSet()
    {
        _text = Value;
    }

    Task NotifyChanged()
    {
        return ValueChanged.InvokeAsync(_text);
    }

    async Task HandleSave()
    {
        if (OnSave.HasDelegate)
            await OnSave.InvokeAsync();
    }

    async Task HandleCancel()
    {
        if (OnCancel.HasDelegate)
            await OnCancel.InvokeAsync();
    }

}