content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.ambari.server.stack;
  
  import java.io.File;
  import java.io.FileNotFoundException;
  import java.io.FileReader;
  import java.io.IOException;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.state.ThemeInfo;
  import org.apache.ambari.server.state.theme.Theme;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.fasterxml.jackson.databind.ObjectMapper;
  
  public class ThemeModule extends BaseModule<ThemeModule, ThemeInfo> implements Validable {
  
    private static final Logger LOG = LoggerFactory.getLogger(ThemeModule.class);
    private static final ObjectMapper mapper = new ObjectMapper();
  
    public static final String THEME_KEY = "Theme";
  
    private ThemeInfo moduleInfo;
    private boolean valid = true;
    private Set<String> errors = new HashSet<>();
  
    public ThemeModule(File themeFile) {
      this(themeFile, new ThemeInfo());
    }
  
    public ThemeModule(File themeFile, ThemeInfo moduleInfo) {
      this.moduleInfo = moduleInfo;
      if (!moduleInfo.isDeleted() && themeFile != null) {
        LOG.debug("Looking for theme in {}", themeFile.getAbsolutePath());
        FileReader reader = null;
        try {
          reader = new FileReader(themeFile);
        } catch (FileNotFoundException e) {
          LOG.error("Theme file not found");
        }
        try {
          Theme theme = mapper.readValue(reader, Theme.class);
          Map<String, Theme> map = new HashMap<>();
          map.put(THEME_KEY, theme);
          moduleInfo.setThemeMap(map);
          LOG.debug("Loaded theme: {}", moduleInfo);
        } catch (IOException e) {
          LOG.error("Unable to parse theme file ", e);
          setValid(false);
          addError("Unable to parse theme file " + themeFile);
        }
      }
    }
  
    public ThemeModule(ThemeInfo moduleInfo) {
      this.moduleInfo = moduleInfo;
    }
  
    @Override
    public void resolve(ThemeModule parent, Map<String, StackModule> allStacks,
  		  Map<String, ServiceModule> commonServices, Map<String, ExtensionModule> extensions) throws AmbariException {
      ThemeInfo parentModuleInfo = parent.getModuleInfo();
  
      if (parent.getModuleInfo() != null && !moduleInfo.isDeleted()) {
        if (moduleInfo.getThemeMap() == null || moduleInfo.getThemeMap().isEmpty()) {
          moduleInfo.setThemeMap(parentModuleInfo.getThemeMap());
        } else if(parentModuleInfo.getThemeMap() != null && !parentModuleInfo.getThemeMap().isEmpty()) {
          Theme childTheme = moduleInfo.getThemeMap().get(THEME_KEY);
          Theme parentTheme = parentModuleInfo.getThemeMap().get(THEME_KEY);
          childTheme.mergeWithParent(parentTheme);
        }
      }
    }
  
    @Override
    public ThemeInfo getModuleInfo() {
      return moduleInfo;
    }
  
    @Override
    public boolean isDeleted() {
      return false;
    }
  
    @Override
    public String getId() {
      return moduleInfo.getFileName();
    }
  
    @Override
    public boolean isValid() {
      return valid;
    }
  
    @Override
    public void setValid(boolean valid) {
      this.valid = valid;
    }
  
    @Override
    public void addError(String error) {
      errors.add(error);
    }
  
    @Override
    public void addErrors(Collection<String> errors) {
      this.errors.addAll(errors);
    }
  
    @Override
    public Collection<String> getErrors() {
      return errors;
    }
  }
  