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48 lines
1.9 KiB
Kotlin
48 lines
1.9 KiB
Kotlin
3 years ago
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/* 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.home.sessioncontrol
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import kotlinx.coroutines.ExperimentalCoroutinesApi
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import kotlinx.coroutines.flow.Flow
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import kotlinx.coroutines.flow.collect
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import kotlinx.coroutines.flow.map
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import mozilla.components.browser.state.selector.normalTabs
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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 mozilla.components.support.ktx.kotlinx.coroutines.flow.ifChanged
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import org.mozilla.fenix.home.HomeFragmentAction
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import org.mozilla.fenix.home.HomeFragmentStore
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/**
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* View-bound feature that dispatches recent tab changes to the [HomeFragmentStore] when the
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* [BrowserStore] is updated.
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*/
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@OptIn(ExperimentalCoroutinesApi::class)
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class RecentTabsListFeature(
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private val browserStore: BrowserStore,
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private val homeStore: HomeFragmentStore
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) : AbstractBinding<BrowserState>(browserStore) {
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override suspend fun onState(flow: Flow<BrowserState>) {
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flow.map { it.selectedTabId }
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.ifChanged()
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.collect { selectedTabId ->
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// Attempt to get the selected normal tab since here may not be a selected tab or
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// the selected tab may be a private tab.
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val selectedTab = browserStore.state.normalTabs.firstOrNull {
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it.id == selectedTabId
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}
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val recentTabsList = if (selectedTab != null) {
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listOf(selectedTab)
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} else {
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emptyList()
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}
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homeStore.dispatch(HomeFragmentAction.RecentTabsChange(recentTabsList))
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}
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}
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}
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