package org.apache.archiva.redback.rest.services;
   /*
    * 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.
   */
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.lang.StringUtils;
  import org.apache.archiva.redback.rest.api.services.RedbackServiceException;
  import org.apache.archiva.redback.rest.api.services.UtilServices;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.PostConstruct;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Map;
  import java.util.Properties;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   * @author Olivier Lamy
   * @since 1.4
   */
  @Service( "utilServices#rest" )
  public class DefaultUtilServices
      implements UtilServices
  {
  
      private Logger log = LoggerFactory.getLogger( getClass() );
  
      private Map<String, String> cachei18n = new ConcurrentHashMap<String, String>();
  
      @PostConstruct
      public void init()
          throws RedbackServiceException
      {
  
          // preload i18n en and fr
          getI18nProperties( "en" );
          getI18nProperties( "fr" );
      }
  
      public String getI18nResources( String locale )
          throws RedbackServiceException
      {
          String cachedi18n = cachei18n.get( StringUtils.isEmpty( locale ) ? "en" : StringUtils.lowerCase( locale ) );
          if ( cachedi18n != null )
          {
              return cachedi18n;
          }
  
          Properties properties = new Properties();
  
          // load redback user api messages
          try
          {
  
              // load default first then requested locale
              loadResource( properties, "org/apache/archiva/redback/users/messages", null );
              loadResource( properties, "org/apache/archiva/redback/users/messages", locale );
  
          }
          catch ( IOException e )
          {
              log.warn( "skip error loading properties {}", "org/apache/archiva/redback/users/messages" );
          }
  
          try
          {
  
              // load default first then requested locale
              loadResource( properties, "org/apache/archiva/redback/i18n/default", null );
              loadResource( properties, "org/apache/archiva/redback/i18n/default", locale );
  
          }
          catch ( IOException e )
          {
              log.warn( "skip error loading properties {}", "org/apache/archiva/redback/i18n/default" );
          }
  
          StringBuilder output = new StringBuilder();
  
          for ( Map.Entry<Object, Object> entry : properties.entrySet() )
         {
             output.append( (String) entry.getKey() ).append( '=' ).append( (String) entry.getValue() );
             output.append( '\n' );
         }
 
         cachei18n.put( StringUtils.isEmpty( locale ) ? "en" : StringUtils.lowerCase( locale ), output.toString() );
 
         return output.toString();
     }
 
     public Properties getI18nProperties( String locale )
         throws RedbackServiceException
     {
         try
         {
             Properties properties = new Properties();
             // load default first then requested locale
             loadResource( properties, "org/apache/archiva/redback/users/messages", null );
             loadResource( properties, "org/apache/archiva/redback/users/messages", locale );
 
             loadResource( properties, "org/apache/archiva/redback/i18n/default", null );
             loadResource( properties, "org/apache/archiva/redback/i18n/default", locale );
             return properties;
         }
         catch ( IOException e )
         {
             throw new RedbackServiceException( e.getMessage() );
         }
     }
 
     private void loadResource( final Properties finalProperties, String resourceName, String locale )
         throws IOException
     {
         InputStream is = null;
         Properties properties = new Properties();
         try
         {
             if ( StringUtils.isNotEmpty( locale ) )
             {
                 resourceName = resourceName + "_" + locale;
             }
             resourceName = resourceName + ".properties";
             is = Thread.currentThread().getContextClassLoader().getResourceAsStream( resourceName );
             if ( is != null )
             {
                 properties.load( is );
                 finalProperties.putAll( properties );
             }
             else
             {
                 if ( !StringUtils.equalsIgnoreCase( locale, "en" ) )
                 {
                     log.info( "cannot load resource {}", resourceName );
                 }
             }
         }
         finally
         {
             IOUtils.closeQuietly( is );
         }
 
     }
 
 
 }