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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.fenix.bindings
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.collectLatest
import kotlinx.coroutines.flow.distinctUntilChangedBy
import mozilla.components.browser.state.selector.selectedTab
import mozilla.components.browser.state.state.BrowserState
import mozilla.components.browser.state.store.BrowserStore
import mozilla.components.lib.state.helpers.AbstractBinding
import org.mozilla.fenix.components.AppStore
import org.mozilla.fenix.components.appstate.AppAction
/**
* Binding to update the [AppStore] based on changes to [BrowserState].
*/
class BrowserStoreBinding(
browserStore: BrowserStore,
private val appStore: AppStore,
) : AbstractBinding<BrowserState>(browserStore) {
override suspend fun onState(flow: Flow<BrowserState>) {
// Update the AppStore with the latest selected tab
flow.distinctUntilChangedBy { it.selectedTabId }
.collectLatest { state ->
state.selectedTab?.let { tab ->
// Ignore re-observations due to lifecycle events, or other pieces of state like
// [mode] may get overwritten
if (appStore.state.selectedTabId != tab.id) {
appStore.dispatch(AppAction.SelectedTabChanged(tab))
}
}
}
}
}