1 /*
2  * Copyright (C) 2023 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.customization.picker.color.domain.interactor
18 
19 import com.android.customization.picker.color.data.repository.ColorPickerRepository
20 import com.android.customization.picker.color.shared.model.ColorOptionModel
21 import javax.inject.Inject
22 import javax.inject.Singleton
23 import kotlinx.coroutines.flow.MutableStateFlow
24 import kotlinx.coroutines.flow.asStateFlow
25 import kotlinx.coroutines.flow.onEach
26 
27 /** Single entry-point for all application state and business logic related to system color. */
28 @Singleton
29 class ColorPickerInteractor
30 @Inject
31 constructor(
32     private val repository: ColorPickerRepository,
33     private val snapshotRestorer: ColorPickerSnapshotRestorer,
34 ) {
35     val isApplyingSystemColor = repository.isApplyingSystemColor
36 
37     /**
38      * The newly selected color option for overwriting the current active option during an
39      * optimistic update, the value is set to null when update completes
40      */
41     private val _selectingColorOption = MutableStateFlow<ColorOptionModel?>(null)
42     val selectingColorOption = _selectingColorOption.asStateFlow()
43 
44     /** List of wallpaper and preset color options on the device, categorized by Color Type */
45     val colorOptions =
<lambda>null46         repository.colorOptions.onEach {
47             // Reset optimistic update value when colorOptions updates
48             _selectingColorOption.value = null
49         }
50 
selectnull51     suspend fun select(colorOptionModel: ColorOptionModel) {
52         _selectingColorOption.value = colorOptionModel
53         try {
54             // Do not reset optimistic update selection on selection success because UI color is not
55             // actually updated until the picker restarts. Wait to do so when updated color options
56             // become available
57             repository.select(colorOptionModel)
58             snapshotRestorer.storeSnapshot(colorOptionModel)
59         } catch (e: Exception) {
60             _selectingColorOption.value = null
61         }
62     }
63 }
64