/*
    * Copyright 2012-2021 CodeLibs Project and the Others.
    *
    * 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 org.codelibs.fess.helper;
  
  import java.util.LinkedHashMap;
  import java.util.Map;
  
  import javax.annotation.PostConstruct;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.codelibs.core.lang.StringUtil;
  import org.codelibs.core.stream.StreamUtil;
  import org.codelibs.fess.util.ComponentUtil;
  
  public class FileTypeHelper {
      private static final Logger logger = LogManager.getLogger(FileTypeHelper.class);
  
      protected String defaultValue = "others";
  
      protected Map<String, String> mimetypeMap = new LinkedHashMap<>();
  
      @PostConstruct
      public void init() {
          StreamUtil.split(ComponentUtil.getFessConfig().getIndexFiletype(), "\n")
                  .of(stream -> stream.filter(StringUtil::isNotBlank).forEach(s -> {
                      final String[] values = StringUtils.split(s, "=", 2);
                      if (values.length == 2) {
                          mimetypeMap.put(values[0], values[1]);
                      }
                  }));
          if (logger.isDebugEnabled()) {
              logger.debug("loaded filetype: {}", mimetypeMap);
          }
      }
  
      public void add(final String mimetype, final String filetype) {
          mimetypeMap.put(mimetype, filetype);
      }
  
      public String get(final String mimetype) {
          final String filetype = mimetypeMap.get(mimetype);
          if (StringUtil.isBlank(filetype)) {
              return defaultValue;
          }
          return filetype;
      }
  
      public String getDefaultValue() {
          return defaultValue;
      }
  
      public void setDefaultValue(final String defaultValue) {
          this.defaultValue = defaultValue;
      }
  
      public String[] getTypes() {
          return mimetypeMap.values().stream().distinct().toArray(n -> new String[n]);
      }
  }