/*
    * 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.tomcat.webresources;
  
  import java.util.jar.Attributes;
  import java.util.jar.JarFile;
  import java.util.jar.Manifest;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  import org.apache.catalina.Context;
  import org.apache.catalina.LifecycleException;
  import org.apache.catalina.WebResource;
  import org.apache.catalina.webresources.StandardRoot;
  
  public class FessWebResourceRoot extends StandardRoot {
      private static final Logger logger = Logger.getLogger(FessWebResourceRoot.class.getName());
  
      public FessWebResourceRoot(final Context context) {
          super(context);
      }
  
      @Override
      protected void processWebInfLib() throws LifecycleException {
          super.processWebInfLib();
  
          final WebResource[] possibleJars = listResources("/WEB-INF/plugin", false);
  
          for (final WebResource possibleJar : possibleJars) {
              if (possibleJar.isFile() && possibleJar.getName().endsWith(".jar")) {
                  try (final JarFile jarFile = new JarFile(possibleJar.getCanonicalPath())) {
                      final Manifest manifest = jarFile.getManifest();
                      if (manifest != null && manifest.getEntries() != null) {
                          final Attributes attributes = manifest.getMainAttributes();
                          if (attributes != null
                                  && (attributes.get("Fess-WebAppJar") != null || attributes.getValue("Fess-WebAppJar") != null)) {
                              createWebResourceSet(ResourceSetType.CLASSES_JAR, "/WEB-INF/classes", possibleJar.getURL(), "/");
                          }
                      }
                  } catch (final Exception e) {
                      logger.log(Level.WARNING, "Failed to read " + possibleJar, e);
                  }
              }
          }
      }
  }