internal async Task HandleOnReactionAdded(
Cacheable <IUserMessage, ulong> cachedMessage, ISocketMessageChannel messageChannel, SocketReaction reaction)
{
// TODO: Combine checks for reaction add/remove handler into one method
if (!cachedMessage.HasValue || reaction.UserId == this.Client.CurrentUser.Id)
{
// Ignore the bot's own additions.
return;
}
if (!(reaction.Channel is IGuildChannel guildChannel))
{
// Only listen to guild reacts.
this.Logger.Verbose("Reaction addition ignored because it wasn't on a guild channel");
return;
}
if (!(reaction.User.IsSpecified && reaction.User.Value is IGuildUser guildUser))
{
this.Logger.Verbose("Reaction addition ignored because it wasn't by a guild user");
return;
}
IUserMessage message = cachedMessage.Value;
Player player = null;
bool playerAdded = false;
string errorMessage = null;
bool attempt = this
.GetTournamentsManager(guildChannel.Guild)
.TryReadWriteActionOnCurrentTournament(currentTournament =>
{
player = this.GetPlayerFromReactionEventOrNull(
currentTournament, guildUser, message.Id, reaction.Emote.Name, out errorMessage);
if (player == null)
{
// TODO: we may want to remove the reaction if it's on our team-join messages.
this.Logger.Verbose(
"Reaction addition ignored because it wasn't by a player. Message: {errorMessage}",
errorMessage);
return;
}
// Because player equality/hashing is only based on the ID, we can check if the player is in the set with
// the new instance.
playerAdded = currentTournament.TryAddPlayer(player);
});
if (!(attempt && playerAdded) && errorMessage != null)
{
// TODO: We should remove the reaction they gave instead of this one (this may also require the manage
// emojis permission?). This would also require a map from userIds/Players to emojis in the tournament
// state. The Reactions collection doesn't have information on who added it, and iterating through each
// emoji to see if the user was there would be slow.
Task deleteReactionTask = message.RemoveReactionAsync(
reaction.Emote, guildUser, RequestOptionsSettings.Default);
Task sendMessageTask = guildUser.SendMessageAsync(errorMessage);
await Task.WhenAll(deleteReactionTask, sendMessageTask);
this.Logger.Verbose("Reaction removed. Message: {errorMessage}", errorMessage);
return;
}
else if (player != null)
{
this.Logger.Debug("Player {id} joined team {name}", player.Id, player.Team.Name);
await guildUser.SendMessageAsync(BotStrings.YouHaveJoinedTeam(player.Team.Name));
}
}
