Add Freenet plugin and WoT subprojects

[fwot.git] / wot / src / main / java / net / pterodactylus / freenet / wot / IdentityLoader.java

diff --git a/wot/src/main/java/net/pterodactylus/freenet/wot/IdentityLoader.java b/wot/src/main/java/net/pterodactylus/freenet/wot/IdentityLoader.java
new file mode 100644 (file)
index 0000000..5e64a6a
--- /dev/null
+++ b/wot/src/main/java/net/pterodactylus/freenet/wot/IdentityLoader.java
@@ -0,0 +1,81 @@
+/*
+ * Sone - IdentityLoader.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.freenet.wot;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import net.pterodactylus.freenet.plugin.PluginException;
+
+import com.google.common.base.Optional;
+import com.google.inject.Inject;
+
+/**
+ * Loads {@link OwnIdentity}s and the {@link Identity}s they trust.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class IdentityLoader {
+
+       private final WebOfTrustConnector webOfTrustConnector;
+       private final Optional<Context> context;
+
+       public IdentityLoader(WebOfTrustConnector webOfTrustConnector) {
+               this(webOfTrustConnector, Optional.<Context>absent());
+       }
+
+       @Inject
+       public IdentityLoader(WebOfTrustConnector webOfTrustConnector, Optional<Context> context) {
+               this.webOfTrustConnector = webOfTrustConnector;
+               this.context = context;
+       }
+
+       public Map<OwnIdentity, Collection<Identity>> loadIdentities() throws PluginException {
+               Collection<OwnIdentity> currentOwnIdentities = webOfTrustConnector.loadAllOwnIdentities();
+               return loadTrustedIdentitiesForOwnIdentities(currentOwnIdentities);
+       }
+
+       private Map<OwnIdentity, Collection<Identity>> loadTrustedIdentitiesForOwnIdentities(
+                       Collection<OwnIdentity> ownIdentities) throws PluginException {
+               Map<OwnIdentity, Collection<Identity>> currentIdentities = new HashMap<>();
+
+               for (OwnIdentity ownIdentity : ownIdentities) {
+                       if (identityDoesNotHaveTheCorrectContext(ownIdentity)) {
+                               currentIdentities.put(ownIdentity, Collections.<Identity>emptySet());
+                               continue;
+                       }
+
+                       Set<Identity> trustedIdentities = loadTrustedIdentities(ownIdentity);
+                       currentIdentities.put(ownIdentity, trustedIdentities);
+               }
+
+               return currentIdentities;
+       }
+
+       private boolean identityDoesNotHaveTheCorrectContext(OwnIdentity ownIdentity) {
+               return context.isPresent() && !ownIdentity.hasContext(context.transform(Context::getContext).get());
+       }
+
+       private Set<Identity> loadTrustedIdentities(OwnIdentity ownIdentity) throws PluginException {
+               return webOfTrustConnector.loadTrustedIdentities(ownIdentity, context.transform(Context::getContext));
+       }
+
+}