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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.adservices.ui.settings.viewmodels;
import android.app.Application;
import androidx.annotation.NonNull;
import androidx.annotation.VisibleForTesting;
import androidx.lifecycle.AndroidViewModel;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import com.android.adservices.service.consent.ConsentManager;
import com.android.adservices.ui.settings.fragments.AdServicesSettingsAppsFragment;
import com.android.adservices.ui.settings.fragments.AdServicesSettingsMainFragment;
import com.android.adservices.ui.settings.fragments.AdServicesSettingsTopicsFragment;
import com.android.settingslib.widget.MainSwitchBar;
/**
* View model for the main view of the AdServices Settings App. This view model is responsible
* for serving consent to the main view, and interacting with the {@link ConsentManager} that
* persists the user consent data in a storage.
*/
public class MainViewModel extends AndroidViewModel {
private final MutableLiveData<MainViewModelUiEvent> mEventTrigger = new MutableLiveData<>();
private final MutableLiveData<Boolean> mAdServicesConsent;
private final ConsentManager mConsentManager;
/** UI event triggered by view model */
public enum MainViewModelUiEvent {
SWITCH_ON_PRIVACY_SANDBOX_BETA,
SWITCH_OFF_PRIVACY_SANDBOX_BETA,
DISPLAY_TOPICS_FRAGMENT,
DISPLAY_APPS_FRAGMENT,
}
public MainViewModel(@NonNull Application application) {
this(application, ConsentManager.getInstance(application));
}
@VisibleForTesting
public MainViewModel(@NonNull Application application, ConsentManager consentManager) {
super(application);
mConsentManager = consentManager;
mAdServicesConsent = new MutableLiveData<>(getConsentFromConsentManager());
}
/**
* Provides {@link AdServicesApiConsent} displayed in {@link AdServicesSettingsMainFragment}
* as a Switch value.
*
* @return {@link mAdServicesConsent} indicates if user has consented to PP API usage.
*/
public MutableLiveData<Boolean> getConsent() {
return mAdServicesConsent;
}
/**
* Sets the user consent for PP APIs.
*
* @param newConsentValue the new value that user consent should be set to for PP APIs.
*/
public void setConsent(Boolean newConsentValue) {
if (newConsentValue) {
mConsentManager.enable(getApplication());
} else {
mConsentManager.disable(getApplication());
}
mAdServicesConsent.postValue(getConsentFromConsentManager());
}
/** Returns an observable but immutable event enum representing an view action on UI. */
public LiveData<MainViewModelUiEvent> getUiEvents() {
return mEventTrigger;
}
/**
* Sets the UI Event as handled so the action will not be handled again if activity is
* recreated.
*/
public void uiEventHandled() {
mEventTrigger.postValue(null);
}
/** Triggers {@link AdServicesSettingsTopicsFragment}. */
public void topicsButtonClickHandler() {
mEventTrigger.postValue(MainViewModelUiEvent.DISPLAY_TOPICS_FRAGMENT);
}
/** Triggers {@link AdServicesSettingsAppsFragment}. */
public void appsButtonClickHandler() {
mEventTrigger.postValue(MainViewModelUiEvent.DISPLAY_APPS_FRAGMENT);
}
/**
* Triggers opt out process for Privacy Sandbox. Also reverts the switch state, since
* confirmation dialog will handle switch change.
*/
public void consentSwitchClickHandler(MainSwitchBar mainSwitchBar) {
if (mainSwitchBar.isChecked()) {
mainSwitchBar.setChecked(false);
mEventTrigger.postValue(MainViewModelUiEvent.SWITCH_ON_PRIVACY_SANDBOX_BETA);
} else {
mainSwitchBar.setChecked(true);
mEventTrigger.postValue(MainViewModelUiEvent.SWITCH_OFF_PRIVACY_SANDBOX_BETA);
}
}
private boolean getConsentFromConsentManager() {
return mConsentManager.getConsent().isGiven();
}
}
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