package org.springframework.security.oauth.examples.sparklr.impl;
   
   import java.io.IOException;
   import java.io.InputStream;
   import java.net.URL;
   import java.util.ArrayList;
   import java.util.Collection;
   import java.util.List;
   
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.context.SecurityContextHolder;
  import org.springframework.security.core.userdetails.UserDetails;
  import org.springframework.security.oauth.examples.sparklr.PhotoInfo;
  import org.springframework.security.oauth.examples.sparklr.PhotoService;
  
  /**
   * Basic implementation for the photo service.
   * 
   * @author Ryan Heaton
   */
  public class PhotoServiceImpl implements PhotoService {
  
  	private List<PhotoInfo> photos;
  
  	public Collection<PhotoInfo> getPhotosForCurrentUser(String username) {
  
  		ArrayList<PhotoInfo> infos = new ArrayList<PhotoInfo>();
  		for (PhotoInfo info : getPhotos()) {
  			if (username.equals(info.getUserId())) {
  				infos.add(info);
  			}
  		}
  		return infos;
  
  	}
  
  	public InputStream loadPhoto(String id) {
  		Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
  		if (authentication.getPrincipal() instanceof UserDetails) {
  			UserDetails details = (UserDetails) authentication.getPrincipal();
  			String username = details.getUsername();
  			for (PhotoInfo photoInfo : getPhotos()) {
  				if (id.equals(photoInfo.getId()) && username.equals(photoInfo.getUserId())) {
  					URL resourceURL = getClass().getResource(photoInfo.getResourceURL());
  					if (resourceURL != null) {
  						try {
  							return resourceURL.openStream();
  						} catch (IOException e) {
  							// fall through...
  						}
  					}
  				}
  			}
  		}
  		return null;
  	}
  
  	public List<PhotoInfo> getPhotos() {
  		return photos;
  	}
  
  	public void setPhotos(List<PhotoInfo> photos) {
  		this.photos = photos;
  	}
  }