social-media/backend/src/Web/Features/Contents/Handlers/RemoveReaction.cs

using Hutopy.Web.Features.Contents.Data;

namespace Hutopy.Web.Features.Contents.Handlers;

[PublicAPI]
public sealed class RemoveReactionRequest
{
    public required Guid ContentId { get; set; }
    public required Guid UserId { get; set; }
}

[PublicAPI]
public class RemoveReaction(
    ContentDbContext context)
    : Endpoint<RemoveReactionRequest>
{
    public override void Configure()
    {
        Post("/api/content/reaction/remove");
        Options(o => o.WithTags("Contents"));
    }

    public override async Task HandleAsync(
        RemoveReactionRequest req,
        CancellationToken ct)
    {
        var content = await context.Contents
            .SingleAsync(x => x.Id == req.ContentId, ct);

        var reaction = content.Reactions.Single(x => x.UserId == req.UserId);
  
        content.Reactions.Remove(reaction);
   
        await context.SaveChangesAsync(ct);
    }
}