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package se.leap.bitmaskclient;
import android.content.res.AssetManager;
import com.pedrogomez.renderers.AdapteeCollection;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
/**
* Created by parmegv on 4/12/14.
*/
public class ProviderManager implements AdapteeCollection<Provider> {
private AssetManager assetsManager;
private File externalFilesDir;
private Set<Provider> defaultProviders;
private Set<Provider> customProviders;
private static ProviderManager instance;
final private static String URLS = "urls";
public static ProviderManager getInstance(AssetManager assetsManager, File externalFilesDir) {
if (instance == null)
instance = new ProviderManager(assetsManager, externalFilesDir);
return instance;
}
private ProviderManager(AssetManager assetManager, File externalFilesDir) {
this.assetsManager = assetManager;
addDefaultProviders(assetManager);
addCustomProviders(externalFilesDir);
}
private void addDefaultProviders(AssetManager assets_manager) {
try {
defaultProviders = providersFromAssets(URLS, assets_manager.list(URLS));
} catch (IOException e) {
e.printStackTrace();
}
}
private Set<Provider> providersFromAssets(String directory, String[] relativeFilePaths) {
Set<Provider> providers = new HashSet<>();
for (String file : relativeFilePaths) {
String mainUrl = null;
String certificate = null;
String providerDefinition = null;
try {
String provider = file.substring(0, file.length() - ".url".length());
InputStream provider_file = assetsManager.open(directory + "/" + file);
mainUrl = extractMainUrlFromInputStream(provider_file);
certificate = ConfigHelper.loadInputStreamAsString(assetsManager.open(provider + ".pem"));
providerDefinition = ConfigHelper.loadInputStreamAsString(assetsManager.open(provider + ".json"));
} catch (IOException e) {
e.printStackTrace();
}
try {
providers.add(new Provider(new URL(mainUrl), certificate, providerDefinition));
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
return providers;
}
private void addCustomProviders(File externalFilesDir) {
this.externalFilesDir = externalFilesDir;
customProviders = externalFilesDir != null && externalFilesDir.isDirectory() ?
providersFromFiles(externalFilesDir.list()) :
new HashSet<Provider>();
}
private Set<Provider> providersFromFiles(String[] files) {
Set<Provider> providers = new HashSet<>();
try {
for (String file : files) {
String mainUrl = extractMainUrlFromInputStream(new FileInputStream(externalFilesDir.getAbsolutePath() + "/" + file));
providers.add(new Provider(new URL(mainUrl)));
}
} catch (MalformedURLException | FileNotFoundException e) {
e.printStackTrace();
}
return providers;
}
private String extractMainUrlFromInputStream(InputStream inputStream) {
String mainUrl = "";
JSONObject fileContents = inputStreamToJson(inputStream);
if (fileContents != null)
mainUrl = fileContents.optString(Provider.MAIN_URL);
return mainUrl;
}
private JSONObject inputStreamToJson(InputStream inputStream) {
JSONObject json = null;
try {
byte[] bytes = new byte[inputStream.available()];
if (inputStream.read(bytes) > 0)
json = new JSONObject(new String(bytes));
inputStream.reset();
} catch (IOException | JSONException e) {
e.printStackTrace();
}
return json;
}
public List<Provider> providers() {
List<Provider> allProviders = new ArrayList<>();
allProviders.addAll(defaultProviders);
if(customProviders != null)
allProviders.addAll(customProviders);
allProviders.add(new Provider());
return allProviders;
}
@Override
public int size() {
return providers().size();
}
@Override
public Provider get(int index) {
Iterator<Provider> iterator = providers().iterator();
while (iterator.hasNext() && index > 0) {
iterator.next();
index--;
}
return iterator.next();
}
@Override
public boolean add(Provider element) {
return !defaultProviders.contains(element) || customProviders.add(element);
}
@Override
public boolean remove(Object element) {
return customProviders.remove(element);
}
@Override
public boolean addAll(Collection<? extends Provider> elements) {
return customProviders.addAll(elements);
}
@Override
public boolean removeAll(Collection<?> elements) {
if(!elements.getClass().equals(Provider.class))
return false;
return defaultProviders.removeAll(elements) || customProviders.removeAll(elements);
}
@Override
public void clear() {
defaultProviders.clear();
customProviders.clear();
}
void saveCustomProvidersToFile() {
try {
for (Provider provider : customProviders) {
File providerFile = new File(externalFilesDir, provider.getName() + ".json");
if (!providerFile.exists()) {
FileWriter writer = new FileWriter(providerFile);
writer.write(provider.toJson().toString());
writer.close();
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
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