ingo@2: package de.intevation.flys.client.server;
ingo@2: 
ingo@25: import javax.xml.xpath.XPathConstants;
ingo@25: 
ingo@25: import org.w3c.dom.Document;
ingo@25: import org.w3c.dom.Node;
ingo@25: import org.w3c.dom.NodeList;
ingo@25: 
ingo@1367: import org.apache.log4j.Logger;
ingo@1367: 
ingo@2: import com.google.gwt.user.server.rpc.RemoteServiceServlet;
ingo@2: 
ingo@25: import de.intevation.artifacts.common.ArtifactNamespaceContext;
ingo@25: import de.intevation.artifacts.common.utils.XMLUtils;
ingo@25: 
ingo@25: import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
ingo@25: import de.intevation.artifacts.httpclient.http.HttpClient;
ingo@25: import de.intevation.artifacts.httpclient.http.HttpClientImpl;
ingo@2: 
ingo@2: import de.intevation.flys.client.client.services.UserService;
ingo@217: import de.intevation.flys.client.shared.exceptions.AuthenticationException;
ingo@25: import de.intevation.flys.client.shared.model.DefaultUser;
ingo@25: import de.intevation.flys.client.shared.model.User;
ingo@2: 
ingo@2: 
ingo@2: /**
ingo@2:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@2:  */
ingo@2: public class UserServiceImpl
ingo@2: extends      RemoteServiceServlet
ingo@2: implements   UserService
ingo@2: {
ingo@1367:     private static final Logger logger = Logger.getLogger(UserServiceImpl.class);
ingo@1367: 
ingo@1367: 
ingo@217:     public static final String ERROR_NO_SUCH_USER = "error_no_such_user";
ingo@217: 
ingo@229:     public User getCurrentUser(String serverUrl, String locale)
ingo@217:     throws AuthenticationException
ingo@217:     {
ingo@25:         HttpClient client = new HttpClientImpl(serverUrl);
ingo@25: 
ingo@25:         try {
ingo@25:             Document users = (Document) client.listUsers();
ingo@25: 
ingo@25:             String XPATH_USERS = "/art:users/art:user";
ingo@25: 
ingo@25:             NodeList theUsers = (NodeList) XMLUtils.xpath(
ingo@25:                 users,
ingo@25:                 XPATH_USERS,
ingo@25:                 XPathConstants.NODESET,
ingo@25:                 ArtifactNamespaceContext.INSTANCE);
ingo@25: 
ingo@25:             if (theUsers != null && theUsers.getLength() > 0) {
ingo@25:                 Node user = theUsers.item(0);
ingo@25: 
ingo@25:                 String uuid = XMLUtils.xpathString(
ingo@25:                     user, "@art:uuid", ArtifactNamespaceContext.INSTANCE);
ingo@25:                 String name = XMLUtils.xpathString(
ingo@25:                     user, "@art:name", ArtifactNamespaceContext.INSTANCE);
ingo@25: 
ingo@25:                 return new DefaultUser(uuid, name);
ingo@25:             }
ingo@25:         }
ingo@25:         catch (ConnectionException ce) {
ingo@1367:             logger.error(ce, ce);
ingo@25:         }
ingo@25: 
ingo@1367:         logger.error("No users existing in the server.");
ingo@217:         throw new AuthenticationException(ERROR_NO_SUCH_USER);
ingo@2:     }
ingo@2: }
ingo@2: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :