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38 lines
1.5 KiB
Kotlin
38 lines
1.5 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.bindings
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import kotlinx.coroutines.flow.Flow
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import kotlinx.coroutines.flow.collectLatest
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import kotlinx.coroutines.flow.distinctUntilChangedBy
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import mozilla.components.browser.state.selector.selectedTab
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import mozilla.components.browser.state.state.BrowserState
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import mozilla.components.browser.state.store.BrowserStore
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import mozilla.components.lib.state.helpers.AbstractBinding
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import org.mozilla.fenix.components.AppStore
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import org.mozilla.fenix.components.appstate.AppAction
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/**
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* Binding to update the [AppStore] based on changes to [BrowserState].
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*/
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class BrowserStoreBinding(
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browserStore: BrowserStore,
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private val appStore: AppStore,
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) : AbstractBinding<BrowserState>(browserStore) {
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override suspend fun onState(flow: Flow<BrowserState>) {
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// Update the AppStore with the latest selected tab
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flow.distinctUntilChangedBy { it.selectedTabId }
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.collectLatest { state ->
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state.selectedTab?.let { tab ->
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// Ignore re-observations due to lifecycle events, or other pieces of state like
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// [mode] may get overwritten
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if (appStore.state.selectedTabId != tab.id) {
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appStore.dispatch(AppAction.SelectedTabChanged(tab))
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}
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}
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}
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}
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}
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