/*
 * Copyright © 2019 collin (1634753825@qq.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.github.smart.cloud.starter.log4j2.plugin;

import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.pattern.ConverterKeys;
import org.apache.logging.log4j.core.pattern.LogEventPatternConverter;
import org.apache.logging.log4j.core.pattern.PatternConverter;
import org.apache.logging.log4j.message.Message;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.apache.logging.log4j.util.PerformanceSensitive;
import io.github.smart.cloud.mask.util.MaskUtil;

/**
 * 自定义log4j2模式匹配符
 *
 * @author collin
 * @date 2021-10-30
 */
@Plugin(name = "MaskMessagePatternConverter", category = PatternConverter.CATEGORY)
@ConverterKeys({"mm"})
@PerformanceSensitive("allocation")
public class MaskMessagePatternConverter extends LogEventPatternConverter {

    private MaskMessagePatternConverter() {
        super("Mmessage", "mmessage");
    }

    /**
     * Obtains an instance of pattern converter.
     *
     * @param config  The Configuration.
     * @param options options, may be null.
     * @return instance of pattern converter.
     */
    public static MaskMessagePatternConverter newInstance(final Configuration config, final String[] options) {
        return new MaskMessagePatternConverter();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void format(final LogEvent event, final StringBuilder toAppendTo) {
        Message message = event.getMessage();
        // 参数脱敏处理
        Object[] params = message.getParameters();
        if (params != null && params.length > 0) {
            for (int i = 0; i < params.length; i++) {
                params[i] = MaskUtil.mask(params[i]);
            }
        }
        toAppendTo.append(ParameterizedMessage.format(message.getFormat(), params));
    }

}