@page "/beitraege/{Slug}"
@using System.Globalization
@using Elternbeirat.Web.Services
@inject PostService PostService

@if (_post is null)
{
    <PageTitle>Nicht gefunden</PageTitle>
}
else
{
    <PageTitle>@_post.Title</PageTitle>
    <article>
        <p class="post-meta">
            <a href="/beitraege">&larr; Alle Beiträge</a>
            <time datetime="@_post.Date.ToString("yyyy-MM-dd")">
                @_post.Date.ToString("d. MMMM yyyy", _german)
            </time>
        </p>
        @((MarkupString)_post.ContentHtml)
    </article>
}

@code {
    private static readonly CultureInfo _german = CultureInfo.GetCultureInfo("de-DE");

    [Parameter]
    public string Slug { get; set; } = "";

    private Post? _post;

    protected override void OnParametersSet()
    {
        _post = PostService.Find(Slug);

        // Unknown slug -> 404, so UseStatusCodePagesWithReExecute serves the
        // /not-found page instead of an empty 200 response.
        if (_post is null && HttpContext is not null)
        {
            HttpContext.Response.StatusCode = StatusCodes.Status404NotFound;
        }
    }

    [CascadingParameter]
    private HttpContext? HttpContext { get; set; }
}