private async Task HandleCommandAsync(SocketMessage messageParam)
{
// Don't process the command if it was a system message
if (!(messageParam is SocketUserMessage message))
{
return;
}
// Create a number to track where the prefix ends and the command begins
int argPos = 0;
// Determine if the message is a command based on the prefix and make sure no bots trigger commands
if (!(message.HasCharPrefix('+', ref argPos) ||
message.HasMentionPrefix(client.CurrentUser, ref argPos)) ||
message.Author.IsBot)
{
return;
}
// Create a WebSocket-based command context based on the message
var context = new BotCommandContext(client, message, bot);
// Execute the command with the command context we just
// created, along with the service provider for precondition checks.
// Keep in mind that result does not indicate a return value
// rather an object stating if the command executed successfully.
var result = await commands.ExecuteAsync(
context : context,
argPos : argPos,
services : null);
// Optionally, we may inform the user if the command fails
// to be executed; however, this may not always be desired,
// as it may clog up the request queue should a user spam a
// command.
if (!result.IsSuccess)
{
EmbedBuilder embed = new EmbedBuilder();
embed.WithColor(Color.Red);
switch (result.Error)
{
case CommandError.Exception when result is ExecuteResult eResult:
await ExceptionMessageHelper.HandleException(eResult.Exception, message.Channel);
return;
case CommandError.ParseFailed:
case CommandError.BadArgCount:
var c = commands.Search(context, argPos).Commands.FirstOrDefault().Command;
string name = c.Name;
var module = c.Module;
while (module != null)
{
if (!string.IsNullOrEmpty(module.Group))
{
name = module.Group + " " + name;
}
module = module.Parent;
}
embed.WithTitle("Incorrect Command Usage");
embed.WithDescription($"Error parsing command. Run `+help {name}` for more information.");
break;
case CommandError.UnmetPrecondition:
embed.WithTitle("Error Executing Command");
embed.WithDescription(result.ErrorReason == "" ? "You do not have permission to use this command here." : result.ErrorReason);
break;
case CommandError.UnknownCommand:
// Do nothing
return;
default:
embed.WithTitle("Error Executing Command");
embed.WithColor(Color.Red);
embed.WithDescription(result.ErrorReason);
break;
}
await context.Channel.SendMessageAsync(embed : embed.Build());
}
}