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.systemui.bouncer.ui.viewmodel
18 
19 import com.android.systemui.bouncer.domain.interactor.BouncerInteractor
20 import kotlinx.coroutines.CoroutineScope
21 import kotlinx.coroutines.flow.MutableStateFlow
22 import kotlinx.coroutines.flow.StateFlow
23 import kotlinx.coroutines.flow.asStateFlow
24 import kotlinx.coroutines.launch
25 
26 /** Holds UI state and handles user input for the password bouncer UI. */
27 class PasswordBouncerViewModel(
28     private val applicationScope: CoroutineScope,
29     private val interactor: BouncerInteractor,
30     isInputEnabled: StateFlow<Boolean>,
31 ) :
32     AuthMethodBouncerViewModel(
33         isInputEnabled = isInputEnabled,
34     ) {
35 
36     private val _password = MutableStateFlow("")
37     /** The password entered so far. */
38     val password: StateFlow<String> = _password.asStateFlow()
39 
40     /** Notifies that the UI has been shown to the user. */
41     fun onShown() {
42         interactor.resetMessage()
43     }
44 
45     /** Notifies that the user has changed the password input. */
46     fun onPasswordInputChanged(password: String) {
47         if (this.password.value.isEmpty() && password.isNotEmpty()) {
48             interactor.clearMessage()
49         }
50 
51         _password.value = password
52     }
53 
54     /** Notifies that the user has pressed the key for attempting to authenticate the password. */
55     fun onAuthenticateKeyPressed() {
56         val password = _password.value.toCharArray().toList()
57         _password.value = ""
58 
59         applicationScope.launch {
60             if (interactor.authenticate(password) != true) {
61                 showFailureAnimation()
62             }
63         }
64     }
65 }
66