public async Task SendMessageAndWaitAsync(ICommandContext context, IPaginatedMessage message)
{
PaginatedMessageInfo info = await SendMessageAndReturnInfoAsync(context, message);
if (info != null)
{
// Block until we get a reaction.
info.Waiter = new ManualResetEvent(false);
info.Waiter.WaitOne();
}
}
private async Task ReactionChangedAsync(Cacheable <IUserMessage, ulong> cached, ISocketMessageChannel channel, SocketReaction reaction, bool added)
{
// If this reaction wasn't performed on a paginated message, quit.
if (!paginatedMessages.ContainsKey(reaction.MessageId))
{
return;
}
// If the reaction was added by the bot, quit.
if (reaction.UserId == client.CurrentUser.Id)
{
return;
}
// Get the paginated message.
PaginatedMessageInfo messageInfo = paginatedMessages[reaction.MessageId];
if (!messageInfo.Message.Enabled)
{
return;
}
// Ignore the reaction if it's not from the sender and we only accept reactions from the sender.
if (messageInfo.Message.Restricted && reaction.UserId != messageInfo.Context.User.Id)
{
return;
}
string emoji = reaction.Emote.Name;
Messaging.IMessage currentPage = messageInfo.Message.CurrentPage;
await messageInfo.Message.HandleReactionAsync(new PaginatedMessageReactionArgs(messageInfo.Message, emoji, added));
if (currentPage != messageInfo.Message.CurrentPage)
{
await cached.DownloadAsync().Result.ModifyAsync(msg => {
msg.Content = messageInfo.Message.CurrentPage.Text;
msg.Embed = messageInfo.Message.CurrentPage.Embed.ToDiscordEmbed();
});
}
// If the message was blocking, unblock it.
messageInfo.Waiter?.Set();
}
private async Task <PaginatedMessageInfo> SendMessageAndReturnInfoAsync(ICommandContext context, IPaginatedMessage message)
{
if (message != null && message.Count() > 0)
{
IUserMessage sentMessage = await context.Channel.SendMessageAsync(message.CurrentPage?.Text, false, message.CurrentPage?.Embed?.ToDiscordEmbed());
if (paginatedMessages.Count() >= MaxPaginatedMessages)
{
// Remove the oldest message.
ulong oldestMessageId = paginatedMessages.Keys.Min();
if (paginatedMessages.TryRemove(oldestMessageId, out PaginatedMessageInfo removedInfo))
{
// Unblock the message (if it was blocking).
removedInfo.Waiter?.Set();
removedInfo.Waiter?.Dispose();
// Remove reactions that were added by the bot.
await removedInfo.SentMessage.RemoveReactionsAsync(client.CurrentUser,
removedInfo.Message.Reactions.Select(r => new Emoji(r)).ToArray());
}
}
PaginatedMessageInfo info = new PaginatedMessageInfo {
SentMessage = sentMessage,
Context = context,
Message = message
};
if (paginatedMessages.TryAdd(sentMessage.Id, info))
{
// Add the reactions to the message after we add it to the dictionary.
// This ensures that the service is ready to respond to reactions as soon as they are added.
foreach (string reaction in message.Reactions)
{
await sentMessage.AddReactionAsync(new Emoji(reaction));
}
return(info);
}
}
return(null);
}