/// <summary>
/// Returns whether or not the text is formatted as a command.
/// </summary>
/// <param name="text">The message text.</param>
/// <returns>Whether or not the text is formatted as a command.</returns>
public static bool IsCommand(string text)
{
if (text.Length <= CommandPrefix.Length)
{
return(false);
}
if (!text.ToLower().StartsWith(CommandPrefix.ToLower()))
{
return(false);
}
return(true);
}
/// <summary>
/// Handles a command issued via a Discord message. This does not test if it is a command. Please test with <see cref="IsCommand(string)"/> before running this.
/// </summary>
/// <param name="originalMessage">The Discord message sent by the command.</param>
public static async Task HandleMessageCommand(DiscordMessage originalMessage)
{
DiscordUser author = originalMessage.Author;
BotContext commandContext = BotContextRegistry.GetContext(originalMessage.Channel.Guild);
XanBotLogger.WriteDebugLine("Executing command in bot context. Info:");
XanBotLogger.WriteLine(commandContext.ToConsoleString(), isDebugModeOnly: true);
XanBotMember member = XanBotMember.GetMemberFromUser(commandContext, author);
string text = originalMessage.Content;
if (text.ToLower().StartsWith(CommandPrefix.ToLower()))
{
text = text.Substring(CommandPrefix.Length);
}
while (AllowSpacesAfterPrefix && text.StartsWith(" "))
{
text = text.Substring(1);
}
string[] allArgs = ArgumentSplitter.SplitArgs(text);
string command = allArgs[0];
string[] args = new string[0];
if (allArgs.Length > 1)
{
args = allArgs.Skip(1).ToArray();
}
// Catch case: Prevent excessive command length.
if (command.Length > 32)
{
await ResponseUtil.RespondToAsync(originalMessage, "The command you input is too long.");
XanBotLogger.WriteLine(string.Format("§aUser \"§6{0}§a\" issued a command that was considered too long to parse.", member.FullName));
return;
}
// Catch case: Strip color formatting
command.Replace(XanBotLogger.COLOR_CODE_SYM.ToString(), "");
XanBotLogger.WriteDebugLine("Searching for command...");
Command execCommand = null;
string cmdLower = command.ToLower();
// Search the context FIRST. That ensures that context commands can override stock commands.
foreach (Command cmd in commandContext.Commands)
{
if (cmd.Name.ToLower() == cmdLower)
{
execCommand = cmd;
XanBotLogger.WriteDebugLine($"Found command [{cmd.Name}] in context.");
break;
}
else
{
if (cmd.AlternateNames != null)
{
foreach (string altName in cmd.AlternateNames)
{
if (altName.ToLower() == cmdLower)
{
execCommand = cmd;
break;
}
}
}
}
}
if (execCommand == null)
{
foreach (Command cmd in Commands)
{
if (cmd.Name.ToLower() == command.ToLower())
{
execCommand = cmd;
XanBotLogger.WriteDebugLine($"Found command [{cmd.Name}] globally.");
break;
}
}
}
if (execCommand != null)
{
UsagePermissionPacket usagePerms = execCommand.CanUseCommand(member);
if (usagePerms.CanUse)
{
if (execCommand.CanUseCommandInThisChannel(member, originalMessage.Channel, out DiscordChannel optimalTargetChannel))
{
try
{
string allArgsText = "";
if (args.Length > 0)
{
allArgsText = text.Substring(command.Length + 1);
}
originalMessage.Channel.TriggerTypingAsync().GetAwaiter().GetResult();
await execCommand.ExecuteCommandAsync(commandContext, member, originalMessage, args, allArgsText);
XanBotLogger.WriteLine(string.Format("§aUser \"§6{0}§a\" issued command \"§6{1}§a\" with args {2}", member.FullName, command, ArrayToText(args)));
}
catch (CommandException commandErr)
{
string message = string.Format("§cFailed to issue command `{0}`: §1{1}", commandErr.Command.Name, commandErr.Message);
await ResponseUtil.RespondToAsync(originalMessage, message);
XanBotLogger.WriteLine(string.Format("§aUser \"§6{0}§a\" attempted to issue command \"§6{1}§a\" but it failed. The command gave the reason: §2{2}", member.FullName, commandErr.Command.Name, commandErr.Message));
}
catch (ArchonCommandException commandErr)
{
string message = string.Format("§cFailed to issue Archon Command `{0}`: §1{1}", commandErr.Command.Name, commandErr.Message);
await ResponseUtil.RespondToAsync(originalMessage, message);
XanBotLogger.WriteLine(string.Format("§aUser \"§6{0}§a\" attempted to issue Archon Command \"§6{1}§a\" but it failed. The command gave the reason: §2{2}", member.FullName, commandErr.Command.Name, commandErr.Message));
}
catch (TaskCanceledException taskCancel)
{
XanBotLogger.WriteException(taskCancel);
}
}
else
{
string message = string.Format($"You can't use this command here. Go to <#{optimalTargetChannel.Id}> instead.");
await ResponseUtil.RespondToAsync(originalMessage, message);
}
}
else
{
//string message = string.Format("You are not authorized to use `{0}`. It is only available to permission level `{1}` and above (You are at `{2}`)", execCommand.Name, execCommand.RequiredPermissionLevel, member.PermissionLevel);
await ResponseUtil.RespondToAsync(originalMessage, usagePerms.ErrorMessage);
XanBotLogger.WriteLine(string.Format("§aUser \"§6{0}§a\" attempted to issue command \"§6{1}§a\" but it failed because they don't have a high enough permission level or because the command's CanUseCommand method returned false.", member.FullName, execCommand.Name));
}
}
else
{
await ResponseUtil.RespondToAsync(originalMessage, "The command `" + command + "` does not exist.");
XanBotLogger.WriteLine(string.Format("§aUser \"§6{0}§a\" attempted to issue command \"§6{1}§a\" but it failed because it doesn't exist.", member.FullName, command));
}
}