VCardManager.java 8.54 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
/**
 * $RCSfile$
 * $Revision: 1651 $
 * $Date: 2005-07-20 00:20:39 -0300 (Wed, 20 Jul 2005) $
 *
 * Copyright (C) 2004 Jive Software. All rights reserved.
 *
 * This software is published under the terms of the GNU Public License (GPL),
 * a copy of which is included in this distribution.
 */

package org.jivesoftware.wildfire.vcard;

import org.dom4j.Element;
import org.jivesoftware.util.*;
16
import org.jivesoftware.wildfire.XMPPServer;
17 18
import org.jivesoftware.wildfire.container.BasicModule;
import org.jivesoftware.wildfire.disco.ServerFeaturesProvider;
19
import org.jivesoftware.wildfire.event.UserEventAdapter;
20 21
import org.jivesoftware.wildfire.event.UserEventDispatcher;
import org.jivesoftware.wildfire.user.User;
22

23 24
import java.util.ArrayList;
import java.util.Iterator;
25
import java.util.Map;
26
import java.util.StringTokenizer;
27 28 29 30 31 32

/**
 * Manages VCard information for users.
 *
 * @author Matt Tucker
 */
33
public class VCardManager extends BasicModule implements ServerFeaturesProvider {
34

35 36
    private VCardProvider provider;
    private static VCardManager instance;
37

38 39
    private Cache<String, Element> vcardCache;
    private EventHandler eventHandler;
40 41 42 43 44 45 46 47 48 49 50 51 52 53

    public static VCardManager getInstance() {
        return instance;
    }

    /**
     * Returns the currently-installed VCardProvider. <b>Warning:</b> in virtually all
     * cases the vcard provider should not be used directly. Instead, the appropriate
     * methods in VCardManager should be called. Direct access to the vcard provider is
     * only provided for special-case logic.
     *
     * @return the current VCardProvider.
     */
    public static VCardProvider getProvider() {
54
        return instance.provider;
55 56
    }

57 58
    public VCardManager() {
        super("VCard Manager");
59
        String cacheName = "VCard";
60 61
        vcardCache = CacheManager.initializeCache(cacheName, "vcardCache", 512 * 1024);
        this.eventHandler = new EventHandler();
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
    }

    /**
     * Returns the user's vCard information for a given vcard property name. If the property
     * has no defined text then an empty string will be returned. However, if the property
     * does not exist then a <tt>null</tt> value will be answered. Advanced user systems can
     * use vCard information to link to user directory information or store other relevant
     * user information.</p>
     * Note that many elements in the vCard may have the same path so the returned value in that
     * case will be the first found element. For instance, "ADR:STREET" may be present in
     * many addresses of the user. Use {@link #getVCard(String)} to get the whole vCard of
     * the user.
     *
     * @param username The username of the user to return his vCard property.
     * @param name     The name of the vcard property to retrieve encoded with ':' to denote
     *                 the path.
     * @return The vCard value found
     */
    public String getVCardProperty(String username, String name) {
        String answer = null;
        Element vCardElement = getOrLoadVCard(username);
        if (vCardElement != null) {
            // A vCard was found for this user so now look for the correct element
            Element subElement = null;
            StringTokenizer tokenizer = new StringTokenizer(name, ":");
            while (tokenizer.hasMoreTokens()) {
                String tok = tokenizer.nextToken();
                if (subElement == null) {
                    subElement = vCardElement.element(tok);
                }
                else {
                    subElement = subElement.element(tok);
                }
                if (subElement == null) {
                    break;
                }
            }
            if (subElement != null) {
                answer = subElement.getTextTrim();
            }
        }
        return answer;
    }

    /**
     * Sets the user's vCard information. The new vCard information will be persistent. Advanced
     * user systems can use vCard information to link to user directory information or store
     * other relevant user information.
     *
     * @param username     The username of the user to set his new vCard.
     * @param vCardElement The DOM element sent by the user as his new vcard.
     * @throws Exception if an error occured while storing the new vCard.
     */
    public void setVCard(String username, Element vCardElement) throws Exception {
        if (provider.isReadOnly()) {
            throw new UnsupportedOperationException("VCard provider is read-only.");
        }
        Element oldVCard = getOrLoadVCard(username);
        // See if we need to update the vCard or insert a new one.
        if (oldVCard != null) {
            // Only update the vCard in the database if the vCard has changed.
            if (!oldVCard.equals(vCardElement)) {
                try {
                    provider.updateVCard(username, vCardElement);
                }
                catch (NotFoundException e) {
                    Log.warn("Tried to update a vCard that does not exist", e);
                    provider.createVCard(username, vCardElement);
                }
            }
        }
        else {
            try {
                provider.createVCard(username, vCardElement);
            }
            catch (AlreadyExistsException e) {
                Log.warn("Tried to create a vCard when one already exist", e);
                provider.updateVCard(username, vCardElement);
            }
        }
        vcardCache.put(username, vCardElement);
    }

    /**
     * Deletes the user's vCard from the user account.
     *
     * @param username The username of the user to delete his vCard.
149 150
     * @throws UnsupportedOperationException If the provider is read-only and the data cannot be deleted, this exception
     *                                       is thrown
151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
     */
    public void deleteVCard(String username) {
        if (provider.isReadOnly()) {
            throw new UnsupportedOperationException("VCard provider is read-only.");
        }
        Element oldVCard = getOrLoadVCard(username);
        if (oldVCard != null) {
            vcardCache.remove(username);
            // Delete the property from the DB if it was present in memory
            provider.deleteVCard(username);
        }
    }

    /**
     * Returns the vCard of a given user or null if none was defined before. Changes to the
     * returned vCard will not be stored in the database. Use the returned vCard as a
     * read-only vCard.
     *
     * @return the vCard of a given user.
     */
    public Element getVCard(String username) {
        Element vCardElement = getOrLoadVCard(username);
        return vCardElement == null ? null : vCardElement.createCopy();
    }

    private Element getOrLoadVCard(String username) {
177
        Element vCardElement = vcardCache.get(username);
178 179 180 181 182 183 184 185
        if (vCardElement == null) {
            vCardElement = provider.loadVCard(username);
            if (vCardElement != null) {
                vcardCache.put(username, vCardElement);
            }
        }
        return vCardElement;
    }
186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215

    public void initialize(XMPPServer server) {
        instance = this;

        // Load a VCard provider.
        String className = JiveGlobals.getXMLProperty("provider.vcard.className",
                DefaultVCardProvider.class.getName());
        try {
            Class c = ClassUtils.forName(className);
            provider = (VCardProvider) c.newInstance();
        }
        catch (Exception e) {
            Log.error("Error loading vcard provider: " + className, e);
            provider = new DefaultVCardProvider();
        }
    }

    public void start() {
        // Add this module as a user event listener so we can delete
        // all user properties when a user is deleted
        if (!provider.isReadOnly()) {
            UserEventDispatcher.addListener(eventHandler);
        }
    }

    public void stop() {
        // Remove this module as a user event listener
        UserEventDispatcher.removeListener(eventHandler);
    }

216 217 218 219 220 221
    public Iterator<String> getFeatures() {
        ArrayList<String> features = new ArrayList<String>();
        features.add("vcard-temp");
        return features.iterator();
    }

222 223 224 225 226 227 228
    private class EventHandler extends UserEventAdapter {
        public void userDeleting(User user, Map params) {
            try {
                deleteVCard(user.getUsername());
            } catch (UnsupportedOperationException ue) { /* Do Nothing */ }
        }
    }
229
}