PluralKit/PluralKit.Bot/Utils/SentryUtils.cs

using System.Collections.Generic;

using Myriad.Extensions;
using Myriad.Gateway;

using Sentry;

namespace PluralKit.Bot
{
    public interface ISentryEnricher<T> where T: IGatewayEvent
    {
        void Enrich(Scope scope, Shard shard, T evt);
    }

    public class SentryEnricher:
        ISentryEnricher<MessageCreateEvent>,
        ISentryEnricher<MessageDeleteEvent>,
        ISentryEnricher<MessageUpdateEvent>,
        ISentryEnricher<MessageDeleteBulkEvent>,
        ISentryEnricher<MessageReactionAddEvent>
    {
        private readonly Bot _bot;

        public SentryEnricher(Bot bot)
        {
            _bot = bot;
        }
        
        // TODO: should this class take the Scope by dependency injection instead?
        // Would allow us to create a centralized "chain of handlers" where this class could just be registered as an entry in
        
        public void Enrich(Scope scope, Shard shard, MessageCreateEvent evt)
        {
            scope.AddBreadcrumb(evt.Content, "event.message", data: new Dictionary<string, string>
            {
                {"user", evt.Author.Id.ToString()},
                {"channel", evt.ChannelId.ToString()},
                {"guild", evt.GuildId.ToString()},
                {"message", evt.Id.ToString()},
            });
            scope.SetTag("shard", shard.ShardId.ToString());

            // Also report information about the bot's permissions in the channel
            // We get a lot of permission errors so this'll be useful for determining problems
            var perms = _bot.PermissionsIn(evt.ChannelId);
            scope.AddBreadcrumb(perms.ToPermissionString(), "permissions");
        }

        public void Enrich(Scope scope, Shard shard, MessageDeleteEvent evt)
        {
            scope.AddBreadcrumb("", "event.messageDelete",
                data: new Dictionary<string, string>()
                {
                    {"channel", evt.ChannelId.ToString()},
                    {"guild", evt.GuildId.ToString()},
                    {"message", evt.Id.ToString()},
                });
            scope.SetTag("shard", shard.ShardId.ToString());
        }

        public void Enrich(Scope scope, Shard shard, MessageUpdateEvent evt)
        {
            scope.AddBreadcrumb(evt.Content.Value ?? "<unknown>", "event.messageEdit",
                data: new Dictionary<string, string>()
                {
                    {"channel", evt.ChannelId.ToString()},
                    {"guild", evt.GuildId.Value.ToString()},
                    {"message", evt.Id.ToString()}
                });
            scope.SetTag("shard", shard.ShardId.ToString());
        }

        public void Enrich(Scope scope, Shard shard, MessageDeleteBulkEvent evt)
        {
            scope.AddBreadcrumb("", "event.messageDelete",
                data: new Dictionary<string, string>()
                {
                    {"channel", evt.ChannelId.ToString()},
                    {"guild", evt.GuildId.ToString()},
                    {"messages", string.Join(",", evt.Ids)},
                });
            scope.SetTag("shard", shard.ShardId.ToString());
        }

        public void Enrich(Scope scope, Shard shard, MessageReactionAddEvent evt)
        {
            scope.AddBreadcrumb("", "event.reaction",
                data: new Dictionary<string, string>()
                {
                    {"user", evt.UserId.ToString()},
                    {"channel", evt.ChannelId.ToString()},
                    {"guild", (evt.GuildId ?? 0).ToString()},
                    {"message", evt.MessageId.ToString()},
                    {"reaction", evt.Emoji.Name}
                });
            scope.SetTag("shard", shard.ShardId.ToString());
        }
    }
}