content: /*
   ===========================================================================
   Copyright (c) 2010 BrickRed Technologies Limited
  
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sub-license, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:
  
   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.
  
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   THE SOFTWARE.
   ===========================================================================
   */
  
  package org.brickred.socialauth.seam;
  
  import java.io.Serializable;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.util.List;
  
  import javax.faces.context.ExternalContext;
  import javax.faces.context.FacesContext;
  import javax.servlet.http.HttpServletRequest;
  
  import org.brickred.socialauth.AuthProvider;
  import org.brickred.socialauth.Contact;
  import org.brickred.socialauth.Profile;
  import org.brickred.socialauth.SocialAuthConfig;
  import org.brickred.socialauth.SocialAuthManager;
  import org.brickred.socialauth.util.SocialAuthUtil;
  import org.jboss.seam.ScopeType;
  import org.jboss.seam.annotations.Create;
  import org.jboss.seam.annotations.Install;
  import org.jboss.seam.annotations.Name;
  import org.jboss.seam.annotations.Scope;
  import org.jboss.seam.faces.FacesManager;
  import org.jboss.seam.faces.Redirect;
  import org.jboss.seam.log.LogProvider;
  import org.jboss.seam.log.Logging;
  
  /**
   * This is a JBoss Seam component that allows us to delegate authentication to
   * OpenID / oAuth providers like facebook, foursquare, google, hotmail,
   * linkedin,myspace, openid, twitter, yahoo. Apart from authentication, it also
   * allows us to obtain various details of the user, update status.
   * 
   * This can be inject this component into Seam beans or used directly. Please
   * note that : @Name("socialauth")
   */
  
  @Name("socialauth")
  @Install(precedence = Install.BUILT_IN)
  @Scope(ScopeType.SESSION)
  public class SocialAuth implements Serializable {
  	/**
  	 * Serial version UID generated by Eclipse
  	 */
  	private static final long serialVersionUID = 1789108831048043099L;
  
  	private transient LogProvider log = Logging
  			.getLogProvider(SocialAuth.class);
  
  	private String id;
  	private AuthProvider provider;
  	private String status;
  	private String viewUrl;
  
  	private SocialAuthManager manager;
  	private SocialAuthConfig config;
  
  	@Create
  	/**
  	 * Initializes the component
  	 */
  	public void init() {
  		id = null;
  		provider = null;
  		config = new SocialAuthConfig();
  		try {
  			config.load();
  			manager = new SocialAuthManager();
  			manager.setSocialAuthConfig(config);
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  
  	}
  
  	public String getId() {
  		return id;
  	}
  
  	/**
  	 * Sets the authentication provider. It is mandatory to do this before
  	 * calling login
  	 * 
  	 * @param id
  	 *            Can either have values facebook, foursquare, google, hotmail,
  	 *            linkedin, myspace, twitter, yahoo OR an OpenID URL
  	 */
  	public void setId(final String id) {
  		this.id = id;
  	}
  
  	/**
  	 * Sets the view URL to which the user will be redirected after
  	 * authentication
  	 * 
  	 * @param viewUrl
  	 *            Relative URL of the view, for example "/openid.xhtml"
  	 */
  	public void setViewUrl(final String viewUrl) {
  		this.viewUrl = viewUrl;
  	}
  
  	/**
  	 * Gets the relative URL of the view to which user will be redirected after
  	 * authentication
  	 * 
  	 * @return relative URL of the view
  	 */
  	public String getViewUrl() {
  		return viewUrl;
  	}
  
  	private String returnToUrl() throws MalformedURLException {
  		FacesContext context = FacesContext.getCurrentInstance();
  		HttpServletRequest request = (HttpServletRequest) context
  				.getExternalContext().getRequest();
  
  		URL returnToUrl;
  		if (request.getServerPort() == 80) {
  			returnToUrl = new URL("http", request.getServerName(), context
  					.getApplication().getViewHandler()
  					.getActionURL(context, viewUrl));
  		} else {
  			returnToUrl = new URL("http", request.getServerName(),
  					request.getServerPort(), context.getApplication()
  							.getViewHandler().getActionURL(context, viewUrl));
  
  		}
  		return returnToUrl.toExternalForm();
  	}
  
  	/**
  	 * This is the most important action. It redirects the browser to an
  	 * appropriate URL which will be used for authentication with the provider
  	 * you set using setId()
  	 * 
  	 * @throws Exception
  	 */
  	public void login() throws Exception {
  		String returnToUrl = returnToUrl();
  		String url = manager.getAuthenticationUrl(id, returnToUrl);
  		log.info("Redirecting to:" + url);
  
  		if (url != null) {
  			Redirect redirect = Redirect.instance();
  			redirect.captureCurrentView();
  
  			FacesManager.instance().redirectToExternalURL(url);
  		}
  	}
  
  	/**
  	 * Verifies the user when the external provider redirects back to our
  	 * application
  	 * 
  	 * @throws Exception
  	 */
  	public void connect() throws Exception {
  		log.info("Connecting Provider:" + id);
  		ExternalContext context = javax.faces.context.FacesContext
  				.getCurrentInstance().getExternalContext();
  		HttpServletRequest request = (HttpServletRequest) context.getRequest();
  
  		provider = manager.connect(SocialAuthUtil
  				.getRequestParametersMap(request));
  	}
  
  	/**
  	 * Reinitializes the bean
  	 */
  	public void logout() {
  		init();
  	}
  
  	/**
  	 * Returns the Profile information for the user.
  	 * 
  	 * @return Profile of the user
  	 */
  	public Profile getProfile() throws Exception {
  		return provider.getUserProfile();
  	}
  
  	/**
  	 * Status of the user to be updated on a provider like Facebook or Twitter.
  	 * Remember this will not give us the current status of the user
  	 * 
  	 * @return status message to be updated
  	 */
  	public String getStatus() {
  		return status;
  	}
  
  	/**
  	 * Status of the user to be updated on a provider like Facebook or Twitter.
  	 * To actually update the status, call updateStatus action.
  	 * 
  	 * @param status
  	 */
  	public void setStatus(final String status) {
  		this.status = status;
  	}
  
  	/**
  	 * Updates the status on the given provider. Exception will be thrown if the
  	 * provider does not provide this facility
  	 */
  	public void updateStatus() throws Exception {
  		provider.updateStatus(status);
  	}
  
  	/**
  	 * Gets the list of contacts available from the provider. This may be used
  	 * to import contacts of any user in your web application from your chosen
  	 * provider like Gmail, Yahoo or Hotmail
  	 * 
  	 * @return list of contacts
  	 */
  	public List<Contact> getContactList() throws Exception {
  		return provider.getContactList();
  	}
  
  	/**
  	 * Retrieves the user profile from the provider.
  	 * 
  	 * @return Profile object containing the profile information.
  	 */
  	public Profile getUserProfile() throws Exception {
  		return provider.getUserProfile();
  	}
  
  	/**
  	 * Returns the array list of connected providers ids.
  	 * 
  	 * @return the array list of connected providers ids
  	 */
  	public List<String> getConnectedProvidersIds() {
  		return manager.getConnectedProvidersIds();
  	}
  
  	/**
  	 * Returns the instance of socialauth manager.
  	 * 
  	 * @return the instance of socialauth manager.
  	 */
  	public SocialAuthManager getSocialAuthManager() {
  		return manager;
  	}
  }
  