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package se.leap.bitmaskclient.providersetup;
/**
* Copyright (c) 2023 LEAP Encryption Access Project and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import android.os.Bundle;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import se.leap.bitmaskclient.base.utils.HandlerProvider;
import se.leap.bitmaskclient.base.utils.HandlerProvider.HandlerInterface;
import se.leap.bitmaskclient.tor.TorStatusObservable;
/**
* This Observable tracks the progress of a started provider bootstrapping attempt.
* Each required API call us taken into account as well as the state of tor's bootstrapping in case
* it is used for censorship circumvention.
*/
public class ProviderSetupObservable {
private static final String TAG = ProviderSetupObservable.class.getSimpleName();
private int progress = 0;
private boolean canceled = false;
public static final int DOWNLOADED_PROVIDER_JSON = 20;
public static final int DOWNLOADED_CA_CERT = 40;
public static final int DOWNLOADED_EIP_SERVICE_JSON = 60;
public static final int DOWNLOADED_GEOIP_JSON = 80;
public static final int DOWNLOADED_VPN_CERTIFICATE = 100;
private static ProviderSetupObservable instance;
private final PropertyChangeSupport changeSupport;
public static final String PROPERTY_CHANGE = "ProviderSetupObservable";
private final HandlerInterface handler;
private long lastUpdate = 0;
private int resultCode = 0;
private Bundle resultData;
private ProviderSetupObservable() {
handler = HandlerProvider.get();
changeSupport = new PropertyChangeSupport(this);
resultData = new Bundle();
}
public void addObserver(PropertyChangeListener propertyChangeListener) {
changeSupport.addPropertyChangeListener(propertyChangeListener);
}
public void deleteObserver(PropertyChangeListener propertyChangeListener) {
changeSupport.removePropertyChangeListener(propertyChangeListener);
}
public static ProviderSetupObservable getInstance() {
if (instance == null) {
instance = new ProviderSetupObservable();
}
return instance;
}
public static void storeLastResult(int resultCode, Bundle resultData) {
if (getInstance().canceled) {
return;
}
getInstance().resultCode = resultCode;
getInstance().resultData = resultData;
}
public static void updateProgress(int progress) {
if (getInstance().canceled) {
return;
}
long now = System.currentTimeMillis();
getInstance().handler.postDelayed(() -> {
if (TorStatusObservable.isRunning()) {
getInstance().progress = (TorStatusObservable.getBootstrapProgress() + progress) / 2;
} else {
getInstance().progress = progress;
}
getInstance().changeSupport.firePropertyChange(PROPERTY_CHANGE, null, getInstance());
}, now - getInstance().lastUpdate < 500L ? 500L : 0L);
getInstance().lastUpdate = System.currentTimeMillis() + 500;
}
public static void updateTorSetupProgress() {
if (!TorStatusObservable.isRunning() || getInstance().canceled) {
return;
}
long now = System.currentTimeMillis();
getInstance().handler.postDelayed(() -> {
getInstance().progress = (TorStatusObservable.getBootstrapProgress()) / 2;
getInstance().changeSupport.firePropertyChange(PROPERTY_CHANGE, null, getInstance());
}, now - getInstance().lastUpdate < 500L ? 500L : 0);
getInstance().lastUpdate = System.currentTimeMillis() + 500;
}
public static int getProgress() {
return getInstance().progress;
}
public static boolean isSetupRunning() {
return getInstance().progress > 0;
}
public static void reset() {
getInstance().progress = 0;
getInstance().resultCode = 0;
getInstance().resultData = new Bundle();
getInstance().changeSupport.firePropertyChange(PROPERTY_CHANGE, null, getInstance());
}
public static void cancel() {
getInstance().canceled = true;
reset();
}
public static boolean isCanceled() {
return getInstance().canceled;
}
public static void startSetup() {
getInstance().canceled = false;
getInstance().resultCode = 0;
getInstance().progress = 1;
getInstance().resultData = new Bundle();
}
public static int getResultCode() {
return getInstance().resultCode;
}
public static Bundle getResultData() {
return getInstance().resultData;
}
}
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