/*
    * 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.app.web.api.admin.log;
  
  import static org.codelibs.fess.app.web.admin.log.AdminLogAction.getLogFileItems;
  import static org.codelibs.fess.app.web.admin.log.AdminLogAction.isLogFilename;
  
  import java.io.InputStream;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.Base64;
  import java.util.List;
  import java.util.Map;
  
  import org.codelibs.core.lang.StringUtil;
  import org.codelibs.fess.app.web.api.ApiResult;
  import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
  import org.lastaflute.web.Execute;
  import org.lastaflute.web.response.JsonResponse;
  import org.lastaflute.web.response.StreamResponse;
  
  /**
   * @author Keiichi Watanabe
   */
  public class ApiAdminLogAction extends FessApiAdminAction {
  
      // ===================================================================================
      //                                                                      Search Execute
      //                                                                      ==============
  
      // GET /api/admin/log/files
      @Execute
      public JsonResponse<ApiResult> files() {
          final List<Map<String, Object>> list = getLogFileItems();
          return asJson(new ApiResult.ApiLogFilesResponse().files(list).total(list.size()).status(ApiResult.Status.OK).result());
      }
  
      // GET /api/admin/log/file/{id}
      @Execute
      public StreamResponse get$file(final String id) {
          final String filename = new String(Base64.getDecoder().decode(id), StandardCharsets.UTF_8).replace("..", "").replaceAll("\\s", "");
          final String logFilePath = systemHelper.getLogFilePath();
          if (StringUtil.isNotBlank(logFilePath) && isLogFilename(filename)) {
              final Path path = Paths.get(logFilePath, filename);
              return asStream(filename).contentTypeOctetStream().stream(out -> {
                  try (InputStream in = Files.newInputStream(path)) {
                      out.write(in);
                  }
              });
          }
          return StreamResponse.asEmptyBody();
      }
  }