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package com.juick.command;
import com.juick.User;
import com.juick.server.protocol.ProtocolListener;
import lombok.Getter;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import javax.annotation.PostConstruct;
/**
* @author ma1uta
*/
@Component
@Getter
public class ShowHelp implements Command, ApplicationContextAware {
private static final Pattern PATTERN = Pattern.compile("^help$", Pattern.CASE_INSENSITIVE);
private ApplicationContext applicationContext;
private String help;
@PostConstruct
public void init() {
help = getApplicationContext().getBeansOfType(Command.class).values().stream().map(Command::help).sorted()
.collect(Collectors.joining("\n"));
}
@Override
public Pattern pattern() {
return PATTERN;
}
@Override
public String help() {
return "HELP - returns this help message.";
}
@Override
public String execute(User sender, ProtocolListener protocolListener, String command) {
return getHelp();
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
}
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