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[Sone.git] / src / main / kotlin / net / pterodactylus / sone / freenet / wot / IdentityChangeEventSender.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityChangeEventSender.kt b/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityChangeEventSender.kt
new file mode 100644 (file)
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+++ b/src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityChangeEventSender.kt
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+/*
+ * 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]!!)
+                       }
+
+}