src/main/kotlin/net/pterodactylus/sone/freenet/wot/IdentityChangeEventSender.kt

   1 /*
   2  * Sone - IdentityChangeEventSender.kt - Copyright © 2013–2019 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.freenet.wot
  19
  20 import com.google.common.eventbus.*
  21 import net.pterodactylus.sone.freenet.wot.event.*
  22
  23 /**
  24  * Detects changes in [Identity]s trusted by multiple [OwnIdentity]s.
  25  *
  26  * @see IdentityChangeDetector
  27  */
  28 class IdentityChangeEventSender(private val eventBus: EventBus, private val oldIdentities: Map<OwnIdentity, Collection<Identity>>) {
  29
  30         fun detectChanges(identities: Map<OwnIdentity, Collection<Identity>>) {
  31                 val identityChangeDetector = IdentityChangeDetector(oldIdentities.keys)
  32                 identityChangeDetector.onNewIdentity = addNewOwnIdentityAndItsTrustedIdentities(identities)
  33                 identityChangeDetector.onRemovedIdentity = removeOwnIdentityAndItsTrustedIdentities(oldIdentities)
  34                 identityChangeDetector.onUnchangedIdentity = detectChangesInTrustedIdentities(identities, oldIdentities)
  35                 identityChangeDetector.detectChanges(identities.keys)
  36         }
  37
  38         private fun addNewOwnIdentityAndItsTrustedIdentities(newIdentities: Map<OwnIdentity, Collection<Identity>>) =
  39                         { identity: Identity ->
  40                                 eventBus.post(OwnIdentityAddedEvent(identity as OwnIdentity))
  41                                 newIdentities[identity]
  42                                                 ?.map { IdentityAddedEvent(identity, it) }
  43                                                 ?.forEach(eventBus::post) ?: Unit
  44                         }
  45
  46         private fun removeOwnIdentityAndItsTrustedIdentities(oldIdentities: Map<OwnIdentity, Collection<Identity>>) =
  47                         { identity: Identity ->
  48                                 eventBus.post(OwnIdentityRemovedEvent(identity as OwnIdentity))
  49                                 oldIdentities[identity]
  50                                                 ?.map { IdentityRemovedEvent(identity, it) }
  51                                                 ?.forEach(eventBus::post) ?: Unit
  52                         }
  53
  54         private fun detectChangesInTrustedIdentities(newIdentities: Map<OwnIdentity, Collection<Identity>>, oldIdentities: Map<OwnIdentity, Collection<Identity>>) =
  55                         { ownIdentity: Identity ->
  56                                 val identityChangeDetector = IdentityChangeDetector(oldIdentities[ownIdentity as OwnIdentity]!!)
  57                                 identityChangeDetector.onNewIdentity = { eventBus.post(IdentityAddedEvent(ownIdentity, it)) }
  58                                 identityChangeDetector.onRemovedIdentity = { eventBus.post(IdentityRemovedEvent(ownIdentity, it)) }
  59                                 identityChangeDetector.onChangedIdentity = { eventBus.post(IdentityUpdatedEvent(ownIdentity, it)) }
  60                                 identityChangeDetector.detectChanges(newIdentities[ownIdentity]!!)
  61                         }
  62
  63 }