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package io.dico.dicore.command.predef;
import io.dico.dicore.command.*;
import io.dico.dicore.command.annotation.Range;
import io.dico.dicore.command.parameter.ArgumentBuffer;
import io.dico.dicore.command.parameter.Parameter;
import io.dico.dicore.command.parameter.type.NumberParameterType;
import org.bukkit.command.CommandSender;
/**
* The help command
*/
public class HelpCommand extends PredefinedCommand<HelpCommand> {
private static final Parameter<Integer, Range.Memory> pageParameter;
public static final HelpCommand INSTANCE;
private HelpCommand(boolean modifiable) {
super(modifiable);
getParameterList().addParameter(pageParameter);
getParameterList().setRequiredCount(0);
setDescription("Shows this help page");
}
@Override
protected HelpCommand newModifiableInstance() {
return new HelpCommand(true);
}
@Override
public String execute(CommandSender sender, ExecutionContext context) throws CommandException {
ICommandAddress target = context.getAddress();
if (context.getAddress().getCommand() == this) {
target = target.getParent();
}
context.getAddress().getChatHandler().sendHelpMessage(sender, context, target, context.<Integer>get("page") - 1);
return null;
}
public static void registerAsChild(ICommandAddress address) {
registerAsChild(address, "help");
}
public static void registerAsChild(ICommandAddress address, String main, String... aliases) {
((ModifiableCommandAddress) address).addChild(new ChildCommandAddress(INSTANCE, main, aliases));
}
static {
pageParameter = new Parameter<>("page", "the page number",
new NumberParameterType<Integer>(Integer.TYPE) {
@Override
protected Integer parse(String input) throws NumberFormatException {
return Integer.parseInt(input);
}
@Override
protected Integer select(Number number) {
return number.intValue();
}
@Override
public Integer parseForContext(Parameter<Integer, Range.Memory> parameter, ExecutionContext context, ArgumentBuffer buffer) throws CommandException {
if (context.getAddress().getCommand() == null || context.getAddress().getCommand().getClass() != HelpCommand.class) {
// An address was executed with its help command as target
buffer.next();
return 1;
}
return parse(parameter, context.getSender(), buffer);
}
},
new Range.Memory(1, Integer.MAX_VALUE, 1));
INSTANCE = new HelpCommand(false);
}
}
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