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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
package org.mozilla.tv.firefox.session
import mozilla.components.browser.session.Session
import mozilla.components.browser.session.SessionManager
/**
* A facade to simplify the process of observing [Session]s and sending their information to a [SessionRepo].
*
* Whenever [Session]s are added or removed, this adds/removes a session observer.
*
* Whenever [Session]s change, this prompts the [SessionRepo] to update.
*/
class SessionObserverHelper private constructor(sessionRepo: SessionRepo) {
companion object {
fun attach(sessionRepo: SessionRepo, sessionManager: SessionManager) {
val updater = SessionObserverHelper(sessionRepo)
sessionManager.selectedSession?.register(updater.sessionObserver)
sessionManager.register(updater.sessionManagerObserver)
}
}
// Any time the observed session changes, force the repo to update
private val sessionObserver = object : Session.Observer {
override fun onUrlChanged(session: Session, url: String) {
sessionRepo.update()
}
override fun onDesktopModeChanged(session: Session, enabled: Boolean) {
sessionRepo.update()
}
override fun onLoadingStateChanged(session: Session, loading: Boolean) {
sessionRepo.update()
}
override fun onNavigationStateChanged(session: Session, canGoBack: Boolean, canGoForward: Boolean) {
sessionRepo.update()
}
}
// Any time a new session is created, add a sessionObserver to it.
// When a session is removed, remove the sessionObserver.
val sessionManagerObserver = object : SessionManager.Observer {
override fun onSessionSelected(session: Session) {
session.register(sessionObserver)
sessionRepo.update()
}
override fun onSessionRemoved(session: Session) {
session.unregister(sessionObserver)
}
}
}