Change-Id: Icfa79eac6f7327c365f79fd7d15dfa1f8c77184ddt/nav-safe-args-android-dependency
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/*
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* Copyright 2024 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.ui.interests2pane
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import androidx.lifecycle.SavedStateHandle
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import androidx.lifecycle.ViewModel
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import androidx.navigation.toRoute
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import com.google.samples.apps.nowinandroid.feature.interests.navigation.InterestsDestination
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import com.google.samples.apps.nowinandroid.feature.interests.navigation.TOPIC_ID_KEY
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import dagger.hilt.android.lifecycle.HiltViewModel
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import kotlinx.coroutines.flow.StateFlow
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import javax.inject.Inject
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const val TOPIC_ID_KEY = "selectedTopicId"
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@HiltViewModel
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class Interests2PaneViewModel @Inject constructor(
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private val savedStateHandle: SavedStateHandle,
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) : ViewModel() {
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val destination = savedStateHandle.toRoute<InterestsDestination>()
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val selectedTopicId: StateFlow<String?> = savedStateHandle.getStateFlow(
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key = TOPIC_ID_KEY,
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initialValue = destination.initialTopicId,
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)
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fun onTopicClick(topicId: String?) {
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savedStateHandle[TOPIC_ID_KEY] = topicId
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}
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}
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