src/main/java/net/pterodactylus/sone/template/IdentityAccessor.java

   1 /*
   2  * Sone - IdentityAccessor.java - Copyright © 2010 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.template;
  19
  20 import java.util.Collections;
  21 import java.util.Set;
  22
  23 import net.pterodactylus.sone.core.Core;
  24 import net.pterodactylus.sone.freenet.wot.Identity;
  25 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  26 import net.pterodactylus.sone.freenet.wot.PluginException;
  27 import net.pterodactylus.util.template.Accessor;
  28 import net.pterodactylus.util.template.DataProvider;
  29 import net.pterodactylus.util.template.ReflectionAccessor;
  30
  31 /**
  32  * {@link Accessor} implementation that adds a “uniqueNickname” member to an
  33  * {@link Identity}.
  34  *
  35  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  36  */
  37 public class IdentityAccessor extends ReflectionAccessor {
  38
  39         /** The core. */
  40         private final Core core;
  41
  42         /**
  43          * Creates a new identity accessor.
  44          *
  45          * @param core
  46          *            The core
  47          */
  48         public IdentityAccessor(Core core) {
  49                 this.core = core;
  50         }
  51
  52         /**
  53          * {@inheritDoc}
  54          */
  55         @Override
  56         public Object get(DataProvider dataProvider, Object object, String member) {
  57                 Identity identity = (Identity) object;
  58                 if ("uniqueNickname".equals(member)) {
  59                         int minLength = -1;
  60                         boolean found = false;
  61                         Set<OwnIdentity> ownIdentities = null;
  62                         try {
  63                                 ownIdentities = core.getWebOfTrustConnector().loadAllOwnIdentities();
  64                         } catch (PluginException e) {
  65                                 ownIdentities = Collections.emptySet();
  66                         }
  67                         do {
  68                                 boolean unique = true;
  69                                 String abbreviatedWantedNickname = getAbbreviatedNickname(identity, ++minLength);
  70                                 for (Identity ownIdentity : ownIdentities) {
  71                                         if (ownIdentity.equals(identity)) {
  72                                                 continue;
  73                                         }
  74                                         String abbreviatedNickname = getAbbreviatedNickname(ownIdentity, minLength);
  75                                         if (abbreviatedNickname.equals(abbreviatedWantedNickname)) {
  76                                                 unique = false;
  77                                                 break;
  78                                         }
  79                                 }
  80                                 found = unique;
  81                         } while (!found && (minLength < 43));
  82                         return getAbbreviatedNickname(identity, minLength);
  83                 }
  84                 return super.get(dataProvider, object, member);
  85         }
  86
  87         //
  88         // PRIVATE METHODS
  89         //
  90
  91         /**
  92          * Returns the nickname of the given identity, optionally appending the
  93          * first characters of the ID to it.
  94          *
  95          * @param identity
  96          *            The identity
  97          * @param length
  98          *            The number of characters from the beginning of the ID to
  99          *            append to the nickname
 100          * @return The nickname with optional ID appendage
 101          */
 102         private String getAbbreviatedNickname(Identity identity, int length) {
 103                 return identity.getNickname() + ((length > 0) ? "@" + identity.getId().substring(0, length) : "");
 104         }
 105
 106 }