SocialPub/PrivaPub/Federation/Inbox/Handlers/EmojiReactHandler.cs

using PrivaPub.Domain.Social;
using PrivaPub.Models.User;
using PrivaPub.StaticServices;

using System.Text.Json.Nodes;

using static PrivaPub.Federation.Objects.ActivityJson;

namespace PrivaPub.Federation.Inbox.Handlers
{
	public class EmojiReactHandler : IActivityHandler
	{
		readonly DbEntities _dbEntities;
		readonly IReactions _reactions;

		public EmojiReactHandler(DbEntities dbEntities, IReactions reactions)
		{
			_dbEntities = dbEntities;
			_reactions = reactions;
		}

		public string Type => "EmojiReact";

		public async Task Handle(JsonNode activity, ForeignAvatar actor, CancellationToken token)
		{
			var objectUri = Id(activity["object"]);
			var post = objectUri == default
				? default
				: await _dbEntities.Posts.Match(p => p.ObjectURI == objectUri && !p.DeletedAt.HasValue && p.ReblogOfPostId == null).ExecuteFirstAsync(token);
			if (post == default)
			{
				Arrival.Drop("unknown-object");
				return;
			}
			Arrival.About(post.ObjectType ?? "Note", post.Visibility, post.CreationDate);
			await _reactions.Receive(post, actor, Value(activity, "content"), activity["tag"], Id(activity), token);
		}
	}
}