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package de.pixart.messenger.services;
import androidx.annotation.NonNull;
import android.util.Log;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.jetbrains.annotations.NotNull;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import de.pixart.messenger.Config;
import de.pixart.messenger.http.HttpConnectionManager;
import de.pixart.messenger.http.services.MuclumbusService;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class ChannelDiscoveryService {
private final XmppConnectionService service;
private MuclumbusService muclumbusService;
private final Cache<String, List<MuclumbusService.Room>> cache;
ChannelDiscoveryService(XmppConnectionService service) {
this.service = service;
this.cache = CacheBuilder.newBuilder().expireAfterWrite(5, TimeUnit.MINUTES).build();
}
void initializeMuclumbusService() {
final OkHttpClient.Builder builder = new OkHttpClient.Builder();
if (service.useTorToConnect()) {
try {
builder.proxy(HttpConnectionManager.getProxy());
} catch (IOException e) {
throw new RuntimeException("Unable to use Tor proxy", e);
}
}
builder.networkInterceptors().add(new UserAgentInterceptor(service.getIqGenerator().getUserAgent()));
Retrofit retrofit = new Retrofit.Builder()
.client(builder.build())
.baseUrl(Config.CHANNEL_DISCOVERY)
.addConverterFactory(GsonConverterFactory.create())
.callbackExecutor(Executors.newSingleThreadExecutor())
.build();
this.muclumbusService = retrofit.create(MuclumbusService.class);
}
void discover(String query, OnChannelSearchResultsFound onChannelSearchResultsFound) {
final boolean all = query == null || query.trim().isEmpty();
List<MuclumbusService.Room> result = cache.getIfPresent(all ? "" : query);
if (result != null) {
onChannelSearchResultsFound.onChannelSearchResultsFound(result);
return;
}
if (all) {
discoverChannels(onChannelSearchResultsFound);
} else {
discoverChannels(query, onChannelSearchResultsFound);
}
}
private void discoverChannels(OnChannelSearchResultsFound listener) {
Call<MuclumbusService.Rooms> call = muclumbusService.getRooms(1);
try {
call.enqueue(new Callback<MuclumbusService.Rooms>() {
@Override
public void onResponse(@NonNull Call<MuclumbusService.Rooms> call, @NonNull Response<MuclumbusService.Rooms> response) {
final MuclumbusService.Rooms body = response.body();
if (body == null) {
listener.onChannelSearchResultsFound(Collections.emptyList());
logError(response);
return;
}
cache.put("", body.items);
listener.onChannelSearchResultsFound(body.items);
}
@Override
public void onFailure(@NonNull Call<MuclumbusService.Rooms> call, @NonNull Throwable throwable) {
Log.d(Config.LOGTAG, "Unable to query muclumbus on " + Config.CHANNEL_DISCOVERY, throwable);
listener.onChannelSearchResultsFound(Collections.emptyList());
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
private void discoverChannels(final String query, OnChannelSearchResultsFound listener) {
MuclumbusService.SearchRequest searchRequest = new MuclumbusService.SearchRequest(query);
Call<MuclumbusService.SearchResult> searchResultCall = muclumbusService.search(searchRequest);
searchResultCall.enqueue(new Callback<MuclumbusService.SearchResult>() {
@Override
public void onResponse(@NonNull Call<MuclumbusService.SearchResult> call, @NonNull Response<MuclumbusService.SearchResult> response) {
final MuclumbusService.SearchResult body = response.body();
if (body == null) {
listener.onChannelSearchResultsFound(Collections.emptyList());
logError(response);
return;
}
cache.put(query, body.result.items);
listener.onChannelSearchResultsFound(body.result.items);
}
@Override
public void onFailure(@NonNull Call<MuclumbusService.SearchResult> call, @NonNull Throwable throwable) {
Log.d(Config.LOGTAG, "Unable to query muclumbus on " + Config.CHANNEL_DISCOVERY, throwable);
listener.onChannelSearchResultsFound(Collections.emptyList());
}
});
}
private static void logError(final Response response) {
final ResponseBody errorBody = response.errorBody();
Log.d(Config.LOGTAG, "code from muclumbus=" + response.code());
if (errorBody == null) {
return;
}
try {
Log.d(Config.LOGTAG, "error body=" + errorBody.string());
} catch (IOException e) {
//ignored
}
}
public interface OnChannelSearchResultsFound {
void onChannelSearchResultsFound(List<MuclumbusService.Room> results);
}
private class UserAgentInterceptor implements Interceptor {
private final String userAgent;
UserAgentInterceptor(String userAgent) {
this.userAgent = userAgent;
}
@NotNull
@Override
public okhttp3.Response intercept(Chain chain) throws IOException {
Request originalRequest = chain.request();
Request requestWithUserAgent = originalRequest.newBuilder()
.header("User-Agent", userAgent)
.build();
return chain.proceed(requestWithUserAgent);
}
}
}
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