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package se.leap.bitmaskclient.providersetup;
import static se.leap.bitmaskclient.base.models.Constants.EXT_JSON;
import static se.leap.bitmaskclient.base.models.Constants.EXT_PEM;
import static se.leap.bitmaskclient.base.models.Constants.URLS;
import static se.leap.bitmaskclient.base.models.Provider.GEOIP_URL;
import static se.leap.bitmaskclient.base.models.Provider.MAIN_URL;
import static se.leap.bitmaskclient.base.models.Provider.MOTD_URL;
import static se.leap.bitmaskclient.base.models.Provider.PROVIDER_API_IP;
import static se.leap.bitmaskclient.base.models.Provider.PROVIDER_IP;
import static se.leap.bitmaskclient.base.utils.InputStreamHelper.inputStreamToJson;
import static se.leap.bitmaskclient.base.utils.InputStreamHelper.loadInputStreamAsString;
import android.content.res.AssetManager;
import androidx.annotation.VisibleForTesting;
import org.json.JSONObject;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import se.leap.bitmaskclient.base.models.Provider;
import se.leap.bitmaskclient.base.utils.PreferenceHelper;
/**
* Created by parmegv on 4/12/14.
*/
public class ProviderManager {
private final AssetManager assetsManager;
private Set<Provider> defaultProviders;
// key: MainURL String, value: Provider
private HashMap<String, Provider> customProviders;
private Set<String> defaultProviderURLs;
private static ProviderManager instance;
private boolean addDummyEntry = false;
public static ProviderManager getInstance(AssetManager assetsManager) {
if (instance == null)
instance = new ProviderManager(assetsManager);
return instance;
}
@VisibleForTesting
static void reset() {
instance = null;
}
public void setAddDummyEntry(boolean addDummyEntry) {
this.addDummyEntry = addDummyEntry;
}
private ProviderManager(AssetManager assetManager) {
this.assetsManager = assetManager;
addDefaultProviders(assetManager);
addCustomProviders();
}
private void addDefaultProviders(AssetManager assetManager) {
try {
defaultProviders = providersFromAssets(URLS, assetManager.list(URLS));
defaultProviderURLs = getProviderUrlSetFromProviderSet(defaultProviders);
} catch (IOException e) {
e.printStackTrace();
}
}
private Set<String> getProviderUrlSetFromProviderSet(Set<Provider> providers) {
HashSet<String> providerUrls = new HashSet<>();
for (Provider provider : providers) {
providerUrls.add(provider.getMainUrl().toString());
}
return providerUrls;
}
private Set<Provider> providersFromAssets(String directory, String[] relativeFilePaths) {
Set<Provider> providers = new HashSet<>();
for (String file : relativeFilePaths) {
String mainUrl = null;
String providerIp = null;
String providerApiIp = null;
String certificate = null;
String providerDefinition = null;
String geoipUrl = null;
String motdUrl = null;
try {
String provider = file.substring(0, file.length() - ".url".length());
InputStream providerFile = assetsManager.open(directory + "/" + file);
JSONObject providerConfig = inputStreamToJson(providerFile);
if (providerConfig != null) {
mainUrl = providerConfig.optString(MAIN_URL);
providerIp = providerConfig.optString(PROVIDER_IP);
providerApiIp = providerConfig.optString(PROVIDER_API_IP);
geoipUrl = providerConfig.optString(GEOIP_URL);
motdUrl = providerConfig.optString(MOTD_URL);
}
certificate = loadInputStreamAsString(assetsManager.open(provider + EXT_PEM));
providerDefinition = loadInputStreamAsString(assetsManager.open(provider + EXT_JSON));
} catch (IOException e) {
e.printStackTrace();
}
providers.add(new Provider(mainUrl, geoipUrl, motdUrl, providerIp, providerApiIp, certificate, providerDefinition));
}
return providers;
}
private void addCustomProviders() {
customProviders = PreferenceHelper.getCustomProviders();
}
public List<Provider> providers() {
return providers(addDummyEntry);
}
private List<Provider> providers(boolean addEmptyProvider) {
List<Provider> allProviders = new ArrayList<>();
allProviders.addAll(defaultProviders);
if(customProviders != null)
allProviders.addAll(customProviders.values());
if (addEmptyProvider) {
//add an option to add a custom provider
allProviders.add(new Provider());
}
return allProviders;
}
public int size() {
return providers().size();
}
public Provider get(int index) {
Iterator<Provider> iterator = providers().iterator();
while (iterator.hasNext() && index > 0) {
iterator.next();
index--;
}
return iterator.next();
}
public boolean add(Provider element) {
boolean addElement = element != null &&
!defaultProviderURLs.contains(element.getMainUrlString()) &&
!customProviders.containsKey(element.getMainUrlString());
if (addElement) {
customProviders.put(element.getMainUrlString(), element);
return true;
}
return false;
}
public boolean remove(Object element) {
return element instanceof Provider &&
customProviders.remove(((Provider) element).getMainUrlString()) != null;
}
public boolean addAll(Collection<? extends Provider> elements) {
Iterator iterator = elements.iterator();
boolean addedAll = true;
while (iterator.hasNext()) {
Provider p = (Provider) iterator.next();
boolean containsKey = customProviders.containsKey(p.getMainUrlString());
if (!containsKey) {
customProviders.put(p.getMainUrlString(), p);
}
addedAll = !containsKey && addedAll;
}
return addedAll;
}
public boolean removeAll(Collection<?> elements) {
Iterator iterator = elements.iterator();
boolean removedAll = true;
while (iterator.hasNext()) {
removedAll = remove(iterator.next()) && removedAll;
}
return removedAll;
}
public void clear() {
defaultProviders.clear();
customProviders.clear();
defaultProviderURLs.clear();
}
public void saveCustomProviders() {
PreferenceHelper.setCustomProviders(new HashSet<>(customProviders.values()));
}
}
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