/*
    * Copyright (c) 2002-2022, City of Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.portal.service.file;
  
  import fr.paris.lutece.portal.service.spring.SpringContextService;
  import fr.paris.lutece.portal.service.util.AppException;
  import java.util.List;
  
  /**
   *
   * @author SLE
   */
  public class FileService
  {
  
      // parameters
      public static final String PARAMETER_FILE_ID = "file_id";
      public static final String PARAMETER_RESOURCE_ID = "resource_id";
      public static final String PARAMETER_RESOURCE_TYPE = "resource_type";
      public static final String PARAMETER_VALIDITY_TIME = "validity_time";
      public static final String PARAMETER_DATA = "data";
      public static final String PARAMETER_BO = "is_bo";
      public static final String PARAMETER_PROVIDER = "provider";
  
      // constants
      public static final String PERMISSION_VIEW = "VIEW";
  
      // messages
      private static final String MSG_NO_FILE_SERVICE = "No file service Available";
  
      private IFileStoreServiceProvider _currentFileStoreServiceProvider;
      private static FileService/file/FileService.html#FileService">FileService _instance = new FileService( );
  
      /**
       * init
       */
      private FileService( )
      {
          _currentFileStoreServiceProvider = getDefaultServiceProvider( );
      }
  
      /**
       * getter
       * 
       * @return the instance
       */
      public static FileService getInstance( )
      {
          return _instance;
      }
      
  
      /**
       * health check 
       * 
       * @return true if available
       */
      public boolean healthCheck( )
      {
          return _currentFileStoreServiceProvider.healthCheck( );
      }
  
  
      /**
       * get the current FileStoreService provider
       * 
       * @return the current FileStoreService provider
       */
     public IFileStoreServiceProvider getFileStoreServiceProvider( )
     {
         return _currentFileStoreServiceProvider;
     }
 
     /**
      * get the FileStoreService provider
      * 
      * @param strFileStoreServiceProviderName
      * @return the current FileStoreService provider
      */
     public IFileStoreServiceProvider getFileStoreServiceProvider( String strFileStoreServiceProviderName )
     {
     	List<IFileStoreServiceProvider> fileStoreServiceProviderList = SpringContextService.getBeansOfType( IFileStoreServiceProvider.class );
 
         // search file service
         if ( !fileStoreServiceProviderList.isEmpty( ) )
         {
             for ( IFileStoreServiceProvider fss : fileStoreServiceProviderList )
             {
                 if ( strFileStoreServiceProviderName.equals( fss.getName( ) ) )
                 {
                       return fss;
                 }
             }
         }
 
         // otherwise
         throw new AppException( MSG_NO_FILE_SERVICE );
     }
 
     /**
      * get the current FileStoreService provider
      * 
      * @param strFileStoreServiceProviderName
      */
     public void setFileStoreServiceProvider( String strFileStoreServiceProviderName )
     {
         List<IFileStoreServiceProvider> fileStoreServiceProviderList = SpringContextService.getBeansOfType( IFileStoreServiceProvider.class );
 
         // search file service
         if ( !fileStoreServiceProviderList.isEmpty( ) )
         {
             for ( IFileStoreServiceProvider fss : fileStoreServiceProviderList )
             {
                 if ( strFileStoreServiceProviderName.equals( fss.getName( ) ) )
                 {
                     _currentFileStoreServiceProvider = fss;
                     return;
                 }
             }
         }
 
         // otherwise
         throw new AppException( MSG_NO_FILE_SERVICE );
     }
 
     /**
      * get default File Store Service Provider
      * 
      * @return the provider
      */
     private IFileStoreServiceProvider getDefaultServiceProvider( )
     {
         List<IFileStoreServiceProvider> fileStoreServiceProviderList = SpringContextService.getBeansOfType( IFileStoreServiceProvider.class );
 
         // search default file service
         if ( !fileStoreServiceProviderList.isEmpty( ) )
         {
             for ( IFileStoreServiceProvider fss : fileStoreServiceProviderList )
             {
                 if ( fss.isDefault( ) )
                 {
                     return fss;
                 }
             }
 
             // return the first one otherwise
             return fileStoreServiceProviderList.get( 0 ) ;
         }
 
         // otherwise
         throw new AppException( MSG_NO_FILE_SERVICE );
     }
 }