/// <summary>
/// <para>Called by the <c>ReadCommand</c> method when it deems a message suitable for parsing.</para>
/// <para>Uses the parsing rules as defined by classes that use the <c>VerbAttribute</c> with the <c>IDiscordAction</c> interface.</para>
/// <para>If a parse is successful then the <c>PerformAction</c> method of the parsed verb class is called.</para>
/// </summary>
/// <param name="messageSentToBot">The message which is currently sending a command to the bot.</param>
protected virtual void Parse(SocketMessage messageSentToBot)
{
ParserResult <object> parseResult;
string interceptedOutput;
m_errorStream.GetStringBuilder().Clear();
var commandLineArgs = FunctionalExtras.CommandLineToArgs(messageSentToBot.ToString()).Skip(1);
parseResult = m_commandParser.ParseArguments(commandLineArgs, m_commands.ToArray());
interceptedOutput = m_errorStream.GetStringBuilder().ToString();
parseResult.MapResult(
(IDiscordAction opt) => Task.Run(() => opt.PerformAction(messageSentToBot, m_client)),
errs => Task.Run(() => HandleErrors(errs, interceptedOutput, messageSentToBot))
);
}
/// <summary>
/// <para>Creates an instance of the discord bot class. Will search the calling assembly for all <c>VerbAttributes</c> and apply them to its command parsing rules..</para>
/// </summary>
/// <param name="loginToken">The client secret discord uses to login.</param>
public DiscordBotBase(string loginToken)
{
m_loginToken = loginToken;
m_errorStream = new StringWriter();
//We gather everything with the VerbAttribute, which will be used as the parsing rules.
var commandList = FunctionalExtras.GetTypesWithAttribute(typeof(VerbAttribute), Assembly.GetEntryAssembly());
if (commandList.Count() < 1)
{
commandList = new Type[] { typeof(ExampleVerb) };
}
m_commands = commandList;
m_commandParser = new Parser(settings =>
{
settings.HelpWriter = m_errorStream;
});
}