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[Sone.git] / 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 javax.inject.Inject;
23 import javax.inject.Singleton;
24
25 import net.pterodactylus.sone.core.Core;
26 import net.pterodactylus.sone.freenet.wot.Identity;
27 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
28 import net.pterodactylus.util.template.Accessor;
29 import net.pterodactylus.util.template.ReflectionAccessor;
30 import net.pterodactylus.util.template.TemplateContext;
31
32 /**
33  * {@link Accessor} implementation that adds a “uniqueNickname” member to an
34  * {@link Identity}.
35  *
36  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
37  */
38 @Singleton
39 public class IdentityAccessor extends ReflectionAccessor {
40
41         /** The core. */
42         private final Core core;
43
44         /**
45          * Creates a new identity accessor.
46          *
47          * @param core
48          *            The core
49          */
50         @Inject
51         public IdentityAccessor(Core core) {
52                 this.core = core;
53         }
54
55         /**
56          * {@inheritDoc}
57          */
58         @Override
59         public Object get(TemplateContext templateContext, Object object, String member) {
60                 Identity identity = (Identity) object;
61                 if ("uniqueNickname".equals(member)) {
62                         int minLength = -1;
63                         boolean found;
64                         Set<OwnIdentity> ownIdentities = core.getIdentityManager().getAllOwnIdentities();
65                         do {
66                                 boolean unique = true;
67                                 String abbreviatedWantedNickname = getAbbreviatedNickname(identity, ++minLength);
68                                 for (Identity ownIdentity : ownIdentities) {
69                                         if (ownIdentity.equals(identity)) {
70                                                 continue;
71                                         }
72                                         String abbreviatedNickname = getAbbreviatedNickname(ownIdentity, minLength);
73                                         if (abbreviatedNickname.equals(abbreviatedWantedNickname)) {
74                                                 unique = false;
75                                                 break;
76                                         }
77                                 }
78                                 found = unique;
79                         } while (!found && (minLength < 43));
80                         return getAbbreviatedNickname(identity, minLength);
81                 }
82                 return super.get(templateContext, object, member);
83         }
84
85         //
86         // PRIVATE METHODS
87         //
88
89         /**
90          * Returns the nickname of the given identity, optionally appending the
91          * first characters of the ID to it.
92          *
93          * @param identity
94          *            The identity
95          * @param length
96          *            The number of characters from the beginning of the ID to
97          *            append to the nickname
98          * @return The nickname with optional ID appendage
99          */
100         private static String getAbbreviatedNickname(Identity identity, int length) {
101                 return identity.getNickname() + ((length > 0) ? "@" + identity.getId().substring(0, length) : "");
102         }
103
104 }