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/**
* Copyright (c) 2013 - 2019 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/>.
*/
package se.leap.bitmaskclient.eip;
import android.content.Context;
import android.content.SharedPreferences;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import se.leap.bitmaskclient.Provider;
import se.leap.bitmaskclient.utils.PreferenceHelper;
import static se.leap.bitmaskclient.Constants.GATEWAYS;
import static se.leap.bitmaskclient.Constants.PROVIDER_PRIVATE_KEY;
import static se.leap.bitmaskclient.Constants.PROVIDER_VPN_CERTIFICATE;
/**
* @author parmegv
*/
public class GatewaysManager {
private static final String TAG = GatewaysManager.class.getSimpleName();
private SharedPreferences preferences;
private LinkedHashMap<String, Gateway> gateways = new LinkedHashMap<>();
private Type listType = new TypeToken<ArrayList<Gateway>>() {}.getType();
GatewaysManager(SharedPreferences preferences) {
this.preferences = preferences;
}
/**
* select closest Gateway
* @return the n closest Gateway
*/
public Gateway select(int nClosest) {
GatewaySelector gatewaySelector = new GatewaySelector(new ArrayList<>(gateways.values()));
return gatewaySelector.select(nClosest);
}
/**
* check if there are no gateways defined
* @return true if no gateways defined else false
*/
public boolean isEmpty() {
return gateways.isEmpty();
}
/**
* @return number of gateways defined in the GatewaysManager
*/
public int size() {
return gateways.size();
}
@Override
public String toString() {
return new Gson().toJson(gateways, listType);
}
/**
* parse gateways from eipDefinition
* @param eipDefinition eipServiceJson
*/
void fromEipServiceJson(JSONObject eipDefinition) {
try {
JSONArray gatewaysDefined = eipDefinition.getJSONArray(GATEWAYS);
for (int i = 0; i < gatewaysDefined.length(); i++) {
JSONObject gw = gatewaysDefined.getJSONObject(i);
JSONObject secrets = secretsConfiguration();
Gateway aux = new Gateway(eipDefinition, secrets, gw);
if (gateways.get(aux.getRemoteIP()) == null) {
addGateway(aux);
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private JSONObject secretsConfiguration() {
JSONObject result = new JSONObject();
try {
result.put(Provider.CA_CERT, preferences.getString(Provider.CA_CERT, ""));
result.put(PROVIDER_PRIVATE_KEY, preferences.getString(PROVIDER_PRIVATE_KEY, ""));
result.put(PROVIDER_VPN_CERTIFICATE, preferences.getString(PROVIDER_VPN_CERTIFICATE, ""));
} catch (JSONException e) {
e.printStackTrace();
}
return result;
}
void clearGateways() {
gateways.clear();
}
private void addGateway(Gateway gateway) {
gateways.put(gateway.getRemoteIP(), gateway);
}
/**
* read EipServiceJson from preferences and set gateways
*/
void configureFromPreferences() {
fromEipServiceJson(
PreferenceHelper.getEipDefinitionFromPreferences(preferences)
);
}
}
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