Synnefo

/*

 * Copyright 2008, 2009 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * GSS is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package gr.ebs.gss.server.rest;

import gr.ebs.gss.client.exceptions.ObjectNotFoundException;

import gr.ebs.gss.client.exceptions.RpcException;

import gr.ebs.gss.server.domain.User;

import gr.ebs.gss.server.domain.dto.FileHeaderDTO;

import gr.ebs.gss.server.domain.dto.FolderDTO;

import gr.ebs.gss.server.domain.dto.UserDTO;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

/**

 * A class that handles operations on the 'others' namespace.

 *

 * @author past

 */

public class OthersHandler extends RequestHandler {

        /**

         * The logger.

         */

        private static Log logger = LogFactory.getLog(OthersHandler.class);

        /**

     * Serve the 'others' namespace for the user.

     *

     * @param req The servlet request we are processing

     * @param resp The servlet response we are processing

     * @throws IOException if an input/output error occurs

         */

        void serveOthers(HttpServletRequest req, HttpServletResponse resp) throws IOException {

            String parentUrl = getContextPath(req, true);

        String path = getInnerPath(req, PATH_OTHERS);

                if (path.equals(""))

                        path = "/";

            User user = getUser(req);

            User owner = getOwner(req);

            if (!owner.equals(user)) {

                    resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED);

                    return;

            }

            if (path.equals("/"))

                        try {

                            // Request to retrieve the other users who have shared resources to this user

                        JSONArray json = new JSONArray();

                        List<UserDTO> others = getService().getUsersSharingFoldersForUser(owner.getId());

                            for (UserDTO u: others) {

                                    JSONObject j = new JSONObject();

                                    j.put("username", u.getUsername()).

                                            put("uri", parentUrl + u.getUsername());

                                    json.put(j);

                            }

                    sendJson(req, resp, json.toString());

                    } catch (ObjectNotFoundException e) {

                            logger.error("User not found", e);

                            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

                            return;

                    } catch (RpcException e) {

                            logger.error("", e);

                            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

                            return;

                        } catch (JSONException e) {

                                logger.error("", e);

                                resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

                                return;

                        }

                else

                        try {

                            // Request to retrieve the files and folders shared by the other user

                            // Chop any trailing slash

                        path = path.endsWith("/")? path.substring(0, path.length()-1): path;

                        // Chop any leading slash

                        path = path.startsWith("/")? path.substring(1): path;

                        User other = getService().findUser(path);

                        JSONObject json = new JSONObject();

                                List<JSONObject> subfolders = new ArrayList<JSONObject>();

                        List<FolderDTO> folders = getService().getSharedRootFolders(other.getId(), owner.getId());

                        for (FolderDTO f: folders) {

                                JSONObject j = new JSONObject();

                                j.put("name", f.getName()).

                                        put("uri", getApiRoot() + f.getURI());

                                    subfolders.add(j);

                        }

                            json.put("folders", subfolders);

                        List<JSONObject> files = new ArrayList<JSONObject>();

                        List<FileHeaderDTO> fileHeaders = getService().getSharedFiles(other.getId(), owner.getId());

                        for (FileHeaderDTO f: fileHeaders) {

                                JSONObject j = new JSONObject();

                                    j.put("name", f.getName()).

                                            put("owner", f.getOwner().getUsername()).

                                            put("deleted", f.isDeleted()).

                                            put("version", f.getVersion()).

                                            put("size", f.getFileSize()).

                                            put("content", f.getMimeType()).

                                            put("creationDate", f.getAuditInfo().getCreationDate().getTime()).

                                            put("modificationDate", f.getAuditInfo().getModificationDate().getTime()).

                                            put("path", f.getFolder().getPath()).

                                        put("uri", getApiRoot() + f.getURI());

                                files.add(j);

                        }

                        json.put("files", files);

                    sendJson(req, resp, json.toString());

                    } catch (ObjectNotFoundException e) {

                            logger.error("User not found", e);

                            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

                            return;

                    } catch (RpcException e) {

                            logger.error("", e);

                            resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

                            return;

                        } catch (JSONException e) {

                                logger.error("", e);

                                resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

                                return;

                        }

                   resp.setHeader("Expires", "-1");

        }

}