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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.focus.settings
import androidx.lifecycle.Observer
import androidx.appcompat.app.AppCompatActivity
import mozilla.components.support.base.observer.Consumable
import org.mozilla.focus.ScreenController
import org.mozilla.focus.session.SessionRestorer
import org.mozilla.focus.utils.LiveDataEvent
/** An observer for when the user clears their browsing data. See [UserClearDataEvent] for details. */
class UserClearDataEventObserver(
private val activity: AppCompatActivity,
private val sessionRestorer: SessionRestorer
) : Observer<Consumable<LiveDataEvent>> {
override fun onChanged(event: Consumable<LiveDataEvent>?) {
event?.consume {
sessionRestorer.clearData()
// The global WebView state has been destroyed by Settings but we must still clean up
// local WebView state. The browserFragment's initial state is that there is 1) no page
// loaded and 2) there is no back stack. However, this is impossible to replicate in an
// existing BrowserFragment: loading a blank page will add a page to the back stack. As
// such, our only option is to remove and recreate the BrowserFragment. This is more correct
// because it creates a new session too.
ScreenController.recreateBrowserScreen(activity.supportFragmentManager)
true
}
}
}