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

   1 /*
   2  * Sone - IdentityAccessor.java - Copyright © 2010–2016 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.Set;
  21
  22 import net.pterodactylus.sone.core.Core;
  23 import net.pterodactylus.sone.freenet.wot.Identity;
  24 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  25 import net.pterodactylus.util.template.Accessor;
  26 import net.pterodactylus.util.template.ReflectionAccessor;
  27 import net.pterodactylus.util.template.TemplateContext;
  28
  29 /**
  30  * {@link Accessor} implementation that adds a “uniqueNickname” member to an
  31  * {@link Identity}.
  32  *
  33  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  34  */
  35 public class IdentityAccessor extends ReflectionAccessor {
  36
  37         /** The core. */
  38         private final Core core;
  39
  40         /**
  41          * Creates a new identity accessor.
  42          *
  43          * @param core
  44          *            The core
  45          */
  46         public IdentityAccessor(Core core) {
  47                 this.core = core;
  48         }
  49
  50         /**
  51          * {@inheritDoc}
  52          */
  53         @Override
  54         public Object get(TemplateContext templateContext, Object object, String member) {
  55                 Identity identity = (Identity) object;
  56                 if ("uniqueNickname".equals(member)) {
  57                         int minLength = -1;
  58                         boolean found;
  59                         Set<OwnIdentity> ownIdentities = core.getIdentityManager().getAllOwnIdentities();
  60                         do {
  61                                 boolean unique = true;
  62                                 String abbreviatedWantedNickname = getAbbreviatedNickname(identity, ++minLength);
  63                                 for (Identity ownIdentity : ownIdentities) {
  64                                         if (ownIdentity.equals(identity)) {
  65                                                 continue;
  66                                         }
  67                                         String abbreviatedNickname = getAbbreviatedNickname(ownIdentity, minLength);
  68                                         if (abbreviatedNickname.equals(abbreviatedWantedNickname)) {
  69                                                 unique = false;
  70                                                 break;
  71                                         }
  72                                 }
  73                                 found = unique;
  74                         } while (!found && (minLength < 43));
  75                         return getAbbreviatedNickname(identity, minLength);
  76                 }
  77                 return super.get(templateContext, object, member);
  78         }
  79
  80         //
  81         // PRIVATE METHODS
  82         //
  83
  84         /**
  85          * Returns the nickname of the given identity, optionally appending the
  86          * first characters of the ID to it.
  87          *
  88          * @param identity
  89          *            The identity
  90          * @param length
  91          *            The number of characters from the beginning of the ID to
  92          *            append to the nickname
  93          * @return The nickname with optional ID appendage
  94          */
  95         private static String getAbbreviatedNickname(Identity identity, int length) {
  96                 return identity.getNickname() + ((length > 0) ? "@" + identity.getId().substring(0, length) : "");
  97         }
  98
  99 }