59 lines
1.9 KiB
Kotlin
59 lines
1.9 KiB
Kotlin
package org.moire.ultrasonic.util
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import android.os.Bundle
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import android.support.v4.media.session.MediaSessionCompat
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import android.view.KeyEvent
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/**
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* This class distributes MediaSession related events to its subscribers.
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* It is a primitive implementation of a pub-sub event bus
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*/
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class MediaSessionEventDistributor {
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var eventListenerList: MutableList<MediaSessionEventListener> =
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listOf<MediaSessionEventListener>().toMutableList()
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var cachedToken: MediaSessionCompat.Token? = null
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fun subscribe(listener: MediaSessionEventListener) {
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eventListenerList.add(listener)
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synchronized(this) {
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if (cachedToken != null)
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listener.onMediaSessionTokenCreated(cachedToken!!)
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}
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}
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fun unsubscribe(listener: MediaSessionEventListener) {
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eventListenerList.remove(listener)
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}
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fun releaseCachedMediaSessionToken() {
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synchronized(this) {
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cachedToken = null
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}
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}
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fun raiseMediaSessionTokenCreatedEvent(token: MediaSessionCompat.Token) {
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synchronized(this) {
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cachedToken = token
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eventListenerList.forEach { listener -> listener.onMediaSessionTokenCreated(token) }
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}
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}
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fun raisePlayFromMediaIdRequestedEvent(mediaId: String?, extras: Bundle?) {
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eventListenerList.forEach { listener -> listener.onPlayFromMediaIdRequested(mediaId, extras) }
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}
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fun raisePlayFromSearchRequestedEvent(query: String?, extras: Bundle?) {
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eventListenerList.forEach { listener -> listener.onPlayFromSearchRequested(query, extras) }
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}
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fun raiseSkipToQueueItemRequestedEvent(id: Long) {
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eventListenerList.forEach { listener -> listener.onSkipToQueueItemRequested(id) }
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}
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fun raiseMediaButtonEvent(keyEvent: KeyEvent?) {
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eventListenerList.forEach { listener -> listener.onMediaButtonEvent(keyEvent) }
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}
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}
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