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package io.irain.reactor.logging.utils;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.spi.ILoggingEvent;
import net.logstash.logback.composite.ContextJsonProvider;
import net.logstash.logback.composite.GlobalCustomFieldsJsonProvider;
import net.logstash.logback.composite.loggingevent.*;
import net.logstash.logback.stacktrace.ShortenedThrowableConverter;

/**
 * LogStash 工具
 *
 * @author youta
 */
public class LogStashUtil {

    /**
     * 获取 jsonProviders
     * @param context logger context
     * @param customFields 自定义字段
     * @return LoggingEventJsonProviders
     */
    public static LoggingEventJsonProviders jsonProviders(LoggerContext context,
                                                          String customFields) {
        final LoggingEventJsonProviders jsonProviders = new LoggingEventJsonProviders();
        jsonProviders.addArguments(new ArgumentsJsonProvider());
        jsonProviders.addContext(new ContextJsonProvider<>());
        jsonProviders.addGlobalCustomFields(customFieldsJsonProvider(customFields));
        jsonProviders.addLogLevel(new LogLevelJsonProvider());
        jsonProviders.addLoggerName(loggerNameJsonProvider());
        jsonProviders.addMdc(new MdcJsonProvider());
        jsonProviders.addMessage(new MessageJsonProvider());
        jsonProviders.addPattern(new LoggingEventPatternJsonProvider());
        jsonProviders.addStackTrace(stackTraceJsonProvider());
        jsonProviders.addThreadName(new LoggingEventThreadNameJsonProvider());
        jsonProviders.addTimestamp(timestampJsonProvider());
        jsonProviders.setContext(context);
        return jsonProviders;
    }

    private static GlobalCustomFieldsJsonProvider customFieldsJsonProvider(String customFields) {
        final GlobalCustomFieldsJsonProvider customFieldsJsonProvider = new GlobalCustomFieldsJsonProvider<>();
        customFieldsJsonProvider.setCustomFields(customFields);
        return customFieldsJsonProvider;
    }

    private static LoggerNameJsonProvider loggerNameJsonProvider() {
        final LoggerNameJsonProvider loggerNameJsonProvider = new LoggerNameJsonProvider();
        loggerNameJsonProvider.setShortenedLoggerNameLength(20);
        return loggerNameJsonProvider;
    }

    /**
     * 获取 stackTraceJsonProvider
     * @return StackTraceJsonProvider
     */
    private static StackTraceJsonProvider stackTraceJsonProvider() {
        final StackTraceJsonProvider stackTraceJsonProvider = new StackTraceJsonProvider();
        stackTraceJsonProvider.setThrowableConverter(throwableConverter());
        return stackTraceJsonProvider;
    }

    /**
     * 获取 throwableConverter
     * @return ShortenedThrowableConverter
     */
    public static ShortenedThrowableConverter throwableConverter() {
        final ShortenedThrowableConverter throwableConverter = new ShortenedThrowableConverter();
        throwableConverter.setRootCauseFirst(true);
        return throwableConverter;
    }

    /**
     * 获取 timestampJsonProvider
     * @return LoggingEventFormattedTimestampJsonProvider
     */
    private static LoggingEventFormattedTimestampJsonProvider timestampJsonProvider() {
        final LoggingEventFormattedTimestampJsonProvider timestampJsonProvider = new LoggingEventFormattedTimestampJsonProvider();
        timestampJsonProvider.setTimeZone("UTC");
        return timestampJsonProvider;
    }

}