wot/src/main/java/net/pterodactylus/freenet/wot/IdentityLoader.java

   1 /*
   2  * Sone - IdentityLoader.java - Copyright © 2013 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.freenet.wot;
  19
  20 import java.util.Collection;
  21 import java.util.Collections;
  22 import java.util.HashMap;
  23 import java.util.Map;
  24 import java.util.Set;
  25
  26 import net.pterodactylus.freenet.plugin.PluginException;
  27
  28 import com.google.common.base.Optional;
  29 import com.google.inject.Inject;
  30
  31 /**
  32  * Loads {@link OwnIdentity}s and the {@link Identity}s they trust.
  33  *
  34  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  35  */
  36 public class IdentityLoader {
  37
  38         private final WebOfTrustConnector webOfTrustConnector;
  39         private final Optional<Context> context;
  40
  41         public IdentityLoader(WebOfTrustConnector webOfTrustConnector) {
  42                 this(webOfTrustConnector, Optional.<Context>absent());
  43         }
  44
  45         @Inject
  46         public IdentityLoader(WebOfTrustConnector webOfTrustConnector, Optional<Context> context) {
  47                 this.webOfTrustConnector = webOfTrustConnector;
  48                 this.context = context;
  49         }
  50
  51         public Map<OwnIdentity, Collection<Identity>> loadIdentities() throws PluginException {
  52                 Collection<OwnIdentity> currentOwnIdentities = webOfTrustConnector.loadAllOwnIdentities();
  53                 return loadTrustedIdentitiesForOwnIdentities(currentOwnIdentities);
  54         }
  55
  56         private Map<OwnIdentity, Collection<Identity>> loadTrustedIdentitiesForOwnIdentities(
  57                         Collection<OwnIdentity> ownIdentities) throws PluginException {
  58                 Map<OwnIdentity, Collection<Identity>> currentIdentities = new HashMap<>();
  59
  60                 for (OwnIdentity ownIdentity : ownIdentities) {
  61                         if (identityDoesNotHaveTheCorrectContext(ownIdentity)) {
  62                                 currentIdentities.put(ownIdentity, Collections.<Identity>emptySet());
  63                                 continue;
  64                         }
  65
  66                         Set<Identity> trustedIdentities = loadTrustedIdentities(ownIdentity);
  67                         currentIdentities.put(ownIdentity, trustedIdentities);
  68                 }
  69
  70                 return currentIdentities;
  71         }
  72
  73         private boolean identityDoesNotHaveTheCorrectContext(OwnIdentity ownIdentity) {
  74                 return context.isPresent() && !ownIdentity.hasContext(context.transform(Context::getContext).get());
  75         }
  76
  77         private Set<Identity> loadTrustedIdentities(OwnIdentity ownIdentity) throws PluginException {
  78                 return webOfTrustConnector.loadTrustedIdentities(ownIdentity, context.transform(Context::getContext));
  79         }
  80
  81 }