1 /*
2  * Copyright 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.wallpaper.picker.common.preview.data.repository
18 
19 import com.android.wallpaper.picker.data.WallpaperModel
20 import javax.inject.Inject
21 import javax.inject.Singleton
22 import kotlinx.coroutines.flow.MutableStateFlow
23 import kotlinx.coroutines.flow.StateFlow
24 import kotlinx.coroutines.flow.asStateFlow
25 
26 /**
27  * This application-scoped repository class enables the [WallpaperModel] used for preview to be
28  * shared across activities. It needs to be cleaned up appropriately when it is no longer needed.
29  */
30 @Singleton
31 class PersistentWallpaperModelRepository @Inject constructor() {
32     /** This [WallpaperModel] represents the current selected wallpaper */
33     private val _wallpaperModel = MutableStateFlow<WallpaperModel?>(null)
34     val wallpaperModel: StateFlow<WallpaperModel?> = _wallpaperModel.asStateFlow()
35 
setWallpaperModelnull36     fun setWallpaperModel(wallpaperModel: WallpaperModel) {
37         _wallpaperModel.value = wallpaperModel
38     }
39 
cleanupnull40     fun cleanup() {
41         _wallpaperModel.value = null
42     }
43 }
44