ingo@137: /*
ingo@137:  * Copyright (c) 2011 by Intevation GmbH
ingo@137:  *
ingo@137:  * This program is free software under the LGPL (>=v2.1)
ingo@137:  * Read the file LGPL.txt coming with the software for details
ingo@137:  * or visit http://www.gnu.org/licenses/ if it does not exist.
ingo@137:  */
teichmann@475: package org.dive4elements.artifactdatabase.rest;
ingo@137: 
teichmann@475: import org.dive4elements.artifacts.ArtifactDatabase;
teichmann@475: import org.dive4elements.artifacts.ArtifactDatabaseException;
ingo@137: 
teichmann@475: import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
teichmann@475: import org.dive4elements.artifacts.common.utils.XMLUtils;
ingo@137: 
ingo@137: import java.io.IOException;
ingo@137: 
tom@570: import org.apache.logging.log4j.Logger;
tom@570: import org.apache.logging.log4j.LogManager;
ingo@137: 
ingo@137: import org.restlet.data.MediaType;
ingo@137: import org.restlet.data.Status;
ingo@137: import org.restlet.ext.xml.DomRepresentation;
ingo@137: import org.restlet.representation.EmptyRepresentation;
ingo@137: import org.restlet.representation.Representation;
ingo@137: import org.restlet.Request;
ingo@137: import org.restlet.Response;
ingo@137: 
ingo@137: import org.w3c.dom.Document;
ingo@137: 
ingo@137: /**
ingo@137:  * A resource that handles actions to a specific user.
ingo@137:  *
ingo@137:  * @author <a href="mailto:ingo.weinzierl@intevation">Ingo Weinzierl</a>
ingo@137:  */
ingo@137: public class UserResource
ingo@137: extends      BaseResource
ingo@137: {
felix@395:     /** The logger that is used in this class. */
tom@570:     private static Logger logger = LogManager.getLogger(UserResource.class);
ingo@137: 
felix@395:     /** server URL where to reach the resource. */
ingo@137:     public static final String PATH = "/user/{uuid}";
ingo@137: 
ingo@137:     /**
ingo@137:      * XPath to figure out the type of action (feed, advance) via the
ingo@137:      * incoming POST request.
ingo@137:      */
ingo@137:     public static final String XPATH_ACTION = "/art:action/art:type/@name";
ingo@137: 
felix@395:     /** Error message if no action was given. */
ingo@137:     public static final String NO_ACTION_MSG = "no action given";
ingo@137: 
felix@395:     /** Error message if a unknown action was given. */
ingo@137:     public static final String NO_SUCH_ACTION_MSG = "no such action";
ingo@137: 
felix@395:     /** Action name for deleting users. */
ingo@137:     public static final String ACTION_DELETE = "delete";
ingo@137: 
ingo@137: 
ingo@137:     @Override
ingo@137:     protected Representation innerPost(Representation requestRepr) {
ingo@137:         Document inputDocument = null;
ingo@137: 
ingo@137:         try {
ingo@137:             DomRepresentation input = new DomRepresentation(requestRepr);
ingo@137:             input.setNamespaceAware(true);
ingo@137:             inputDocument = input.getDocument();
ingo@137:         }
ingo@137:         catch (IOException ioe) {
ingo@137:             logger.error(ioe.getMessage());
ingo@137:             Response response = getResponse();
ingo@137:             response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, ioe);
ingo@137:             return new EmptyRepresentation();
ingo@137:         }
ingo@137: 
ingo@137:         String action = XMLUtils.xpathString(
ingo@137:             inputDocument,
ingo@137:             XPATH_ACTION,
ingo@137:             ArtifactNamespaceContext.INSTANCE);
ingo@137: 
ingo@137:         if (action == null || action.length() == 0) {
ingo@137:             Response response = getResponse();
ingo@137:             response.setStatus(
ingo@137:                 Status.CLIENT_ERROR_BAD_REQUEST, NO_ACTION_MSG);
ingo@137:             return new EmptyRepresentation();
ingo@137:         }
ingo@137: 
ingo@137:         Request request = getRequest();
ingo@137: 
ingo@137:         String identifier = (String)request.getAttributes().get("uuid");
ingo@137: 
ingo@137:         ArtifactDatabase db = getArtifactDatabase();
ingo@137: 
ingo@137:         return dispatch(identifier, action, inputDocument, db);
ingo@137:     }
ingo@137: 
ingo@137:     /**
ingo@137:      * Method to figure out which POST action (feed or advance) was
ingo@137:      * triggered and perform this operation on the artifact specified
ingo@137:      * by 'identifier' and found in the artifact database 'db'
ingo@137:      * @param identifier The identifier of the artifact.
ingo@137:      * @param action The action to be performed.
ingo@137:      * @param source The input document to further parameterize the
ingo@137:      * operation.
ingo@137:      * @param db The artifact database where to find the artifact.
ingo@137:      * @return The representation produced by the performed action.
ingo@137:      */
ingo@137:     protected Representation dispatch(
ingo@137:         String           identifier,
ingo@137:         String           action,
ingo@137:         Document         source,
ingo@137:         ArtifactDatabase db)
ingo@137:     {
ingo@137:         Document out = null;
ingo@137: 
ingo@137:         logger.info("Action: " + action + " | User: " + identifier);
ingo@137: 
ingo@137:         try {
ingo@137:             if (action.equals(ACTION_DELETE)) {
ingo@137:                 out = db.deleteUser(identifier, getCallMeta());
ingo@137:             }
ingo@137:             else {
ingo@137:                 throw new ArtifactDatabaseException(NO_SUCH_ACTION_MSG);
ingo@137:             }
ingo@137:         }
ingo@137:         catch (ArtifactDatabaseException adbe) {
ingo@137:             logger.warn(adbe.getLocalizedMessage(), adbe);
ingo@137:             Response response = getResponse();
ingo@137:             response.setStatus(
ingo@137:                 Status.CLIENT_ERROR_BAD_REQUEST, adbe.getMessage());
ingo@137:             return new EmptyRepresentation();
ingo@137:         }
ingo@137: 
ingo@137:         return new DomRepresentation(MediaType.APPLICATION_XML, out);
ingo@137:     }
ingo@137: }
ingo@137: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :