♻️ Extract handler for sone-locked notification

[Sone.git] / src / main / kotlin / net / pterodactylus / sone / web / notification / SoneLockedHandler.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/web/notification/SoneLockedHandler.kt b/src/main/kotlin/net/pterodactylus/sone/web/notification/SoneLockedHandler.kt
new file mode 100644 (file)
index 0000000..8bfbda4
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/web/notification/SoneLockedHandler.kt
@@ -0,0 +1,61 @@
+/**
+ * Sone - SoneLockedHandler.kt - Copyright © 2019 David ‘Bombe’ 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.web.notification
+
+import com.google.common.eventbus.*
+import net.pterodactylus.sone.core.event.*
+import net.pterodactylus.sone.data.*
+import net.pterodactylus.sone.notify.*
+import net.pterodactylus.util.notify.*
+import java.util.concurrent.*
+import java.util.concurrent.atomic.*
+
+/**
+ * Handler for [SoneLockedEvent]s and [SoneUnlockedEvent]s that can schedule notifications after
+ * a certain timeout.
+ */
+class SoneLockedHandler(private val notificationManager: NotificationManager, private val notification: ListNotification<Sone>, private val executor: ScheduledExecutorService) {
+
+       private val future: AtomicReference<ScheduledFuture<*>> = AtomicReference()
+
+       @Subscribe
+       fun soneLocked(soneLockedEvent: SoneLockedEvent) {
+               synchronized(future) {
+                       future.get()?.also { cancelPreviousFuture(it, soneLockedEvent.sone) }
+                       future.set(executor.schedule(showNotification(soneLockedEvent.sone), 5, TimeUnit.MINUTES))
+               }
+       }
+
+       @Subscribe
+       fun soneUnlocked(soneUnlockedEvent: SoneUnlockedEvent) {
+               synchronized(future) {
+                       future.get()?.also { cancelPreviousFuture(it, soneUnlockedEvent.sone) }
+               }
+       }
+
+       private fun cancelPreviousFuture(future: ScheduledFuture<*>, sone: Sone) {
+               notification.remove(sone)
+               future.cancel(true)
+       }
+
+       private fun showNotification(sone: Sone): () -> Unit = {
+               notification.add(sone)
+               notificationManager.addNotification(notification)
+       }
+
+}