ECommerce.Module/Components/Shared/MultiLangInput.razor

@using System.Globalization

<div class="space-y-2">
    <div>DEBUG: ActiveCulture=@ActiveCulture, HideTabs=@HideTabs, IsTextArea=@IsTextArea</div>
    <div class="relative">
        @if (IsTextArea)
        {
            <textarea value="@CurrentValue" @oninput="OnInput" class="textarea textarea-bordered w-full h-24"
                placeholder="@(Placeholder)"></textarea>
        }
        else
        {
            <input type="text" value="@CurrentValue" @oninput="OnInput" class="input input-bordered w-full"
                placeholder="@(Placeholder)" />
        }
    </div>
</div>

@code {
    [Parameter] public Dictionary<string, string> Value { get; set; } = new();
    [Parameter] public EventCallback<Dictionary<string, string>> ValueChanged { get; set; }
    [Parameter] public string Placeholder { get; set; } = "";
    [Parameter] public bool IsTextArea { get; set; } = false;

    [Parameter] public string ActiveCulture { get; set; } = "en";
    [Parameter] public EventCallback<string> ActiveCultureChanged { get; set; }
    [Parameter] public bool HideTabs { get; set; } = false;

    private static readonly Dictionary<string, string> SupportedCultures = new()
    {
        { "en", "English" },
        { "ar", "العربية" },
        { "es", "Español" },
        { "de", "Deutsch" }
    };

    protected override void OnInitialized()
    {
        if (string.IsNullOrEmpty(ActiveCulture))
        {
            var current = CultureInfo.CurrentUICulture.TwoLetterISOLanguageName;
            if (SupportedCultures.ContainsKey(current))
            {
                ActiveCulture = current;
            }
        }
    }

    private string CurrentValue => Value != null && Value.TryGetValue(ActiveCulture, out var v) ? v : "";

    private void OnInput(ChangeEventArgs e)
    {
        var value = e.Value?.ToString() ?? "";
        if (Value == null) Value = new();
        Value[ActiveCulture] = value;
        ValueChanged.InvokeAsync(Value);
    }

    private async Task SelectCulture(string culture)
    {
        ActiveCulture = culture;
        await ActiveCultureChanged.InvokeAsync(culture);
    }
}