--- /dev/null
+/*
+ * Sone - IdentityChangeEventSender.java - Copyright © 2013–2019 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.sone.freenet.wot
+
+import com.google.common.eventbus.*
+import net.pterodactylus.sone.freenet.wot.event.*
+
+/**
+ * Detects changes in [Identity]s trusted by multiple [OwnIdentity]s.
+ *
+ * @see IdentityChangeDetector
+ */
+class IdentityChangeEventSender(private val eventBus: EventBus, private val oldIdentities: Map<OwnIdentity, Collection<Identity>>) {
+
+ fun detectChanges(identities: Map<OwnIdentity, Collection<Identity>>) {
+ val identityChangeDetector = IdentityChangeDetector(oldIdentities.keys)
+ identityChangeDetector.onNewIdentity = addNewOwnIdentityAndItsTrustedIdentities(identities)
+ identityChangeDetector.onRemovedIdentity = removeOwnIdentityAndItsTrustedIdentities(oldIdentities)
+ identityChangeDetector.onUnchangedIdentity = detectChangesInTrustedIdentities(identities, oldIdentities)
+ identityChangeDetector.detectChanges(identities.keys)
+ }
+
+ private fun addNewOwnIdentityAndItsTrustedIdentities(newIdentities: Map<OwnIdentity, Collection<Identity>>) =
+ { identity: Identity ->
+ eventBus.post(OwnIdentityAddedEvent(identity as OwnIdentity))
+ newIdentities[identity]
+ ?.map { IdentityAddedEvent(identity, it) }
+ ?.forEach(eventBus::post) ?: Unit
+ }
+
+ private fun removeOwnIdentityAndItsTrustedIdentities(oldIdentities: Map<OwnIdentity, Collection<Identity>>) =
+ { identity: Identity ->
+ eventBus.post(OwnIdentityRemovedEvent(identity as OwnIdentity))
+ oldIdentities[identity]
+ ?.map { IdentityRemovedEvent(identity, it) }
+ ?.forEach(eventBus::post) ?: Unit
+ }
+
+ private fun detectChangesInTrustedIdentities(newIdentities: Map<OwnIdentity, Collection<Identity>>, oldIdentities: Map<OwnIdentity, Collection<Identity>>) =
+ { ownIdentity: Identity ->
+ val identityChangeDetector = IdentityChangeDetector(oldIdentities[ownIdentity as OwnIdentity]!!)
+ identityChangeDetector.onNewIdentity = { eventBus.post(IdentityAddedEvent(ownIdentity, it)) }
+ identityChangeDetector.onRemovedIdentity = { eventBus.post(IdentityRemovedEvent(ownIdentity, it)) }
+ identityChangeDetector.onChangedIdentity = { eventBus.post(IdentityUpdatedEvent(ownIdentity, it)) }
+ identityChangeDetector.detectChanges(newIdentities[ownIdentity]!!)
+ }
+
+}