Log.java

package arc.util;

import java.io.PrintWriter;
import java.io.StringWriter;

public class Log{
    private static final Object[] empty = {};

    public static boolean useColors = true;
    public static LogLevel level = LogLevel.info;
    public static LogHandler logger = new DefaultLogHandler();
    public static LogFormatter formatter = new DefaultLogFormatter();

    public static void log(LogLevel level, String text, Object... args){
        if(Log.level.ordinal() > level.ordinal()) return;
        logger.log(level, format(text, args));
    }

    public static void debug(String text, Object... args){
        log(LogLevel.debug, text, args);
    }
    
    public static void debug(Object object){
        debug(String.valueOf(object), empty);
    }

    public static void infoList(Object... args){
        if(level.ordinal() > LogLevel.info.ordinal()) return;
        StringBuilder build = new StringBuilder();
        for(Object o : args){
            build.append(o);
            build.append(" ");
        }
        info(build.toString());
    }

    public static void infoTag(String tag, String text){
        log(LogLevel.info, "[" + tag + "] " + text);
    }

    public static void info(String text, Object... args){
        log(LogLevel.info, text, args);
    }

    public static void info(Object object){
        info(String.valueOf(object), empty);
    }

    public static void warn(String text, Object... args){
        log(LogLevel.warn, text, args);
    }

    public static void errTag(String tag, String text){
        log(LogLevel.err, "[" + tag + "] " + text);
    }

    public static void err(String text, Object... args){
        log(LogLevel.err, text, args);
    }

    public static void err(Throwable th){
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        th.printStackTrace(pw);
        err(sw.toString());
    }

    public static void err(String text, Throwable th){
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        th.printStackTrace(pw);
        err(text + ": " + sw);
    }

    public static String format(String text, Object... args){
        return formatColors(text, useColors, args);
    }

    public static String formatColors(String text, boolean useColors, Object... args){
        return formatter.format(text, useColors, args);
    }

    /** @deprecated Use {@link ColorCodes#apply(String, boolean)} instead. */
    @Deprecated
    public static String removeColors(String text){
        return ColorCodes.apply(text, false);
    }

    /** @deprecated Use {@link ColorCodes#apply(String)} instead. */
    @Deprecated
    public static String addColors(String text){
        return ColorCodes.apply(text, true);
    }

    public enum LogLevel{
        debug,
        info,
        warn,
        err,
        none
    }

    public interface LogFormatter{
        String format(String text, boolean useColors, Object... args);
    }
    
    public interface LogHandler{
        void log(LogLevel level, String text);
    }
    

    public static class DefaultLogFormatter implements LogFormatter{
        @Override
        public String format(String text, boolean useColors, Object... args){
            return ColorCodes.apply(Strings.format(text, args), useColors);
        }
    }

    public static class DefaultLogHandler implements LogHandler{
        @Override
        public void log(LogLevel level, String text){
            System.out.println(format((
                level == LogLevel.debug ? "&lc&fb" :
                level == LogLevel.info ? "&fb" :
                level == LogLevel.warn ? "&ly&fb" :
                level == LogLevel.err ? "&lr&fb" :
                "") + text + "&fr"));
        }
    }

    public static class NoopLogHandler implements LogHandler{
        @Override public void log(LogLevel level, String text){}
    }
}