/**
* Copyright (C) 2016 eBusiness Information
*
* This file is part of OSM Contributor.
*
* OSM Contributor 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.
*
* OSM Contributor 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 OSM Contributor. If not, see <http://www.gnu.org/licenses/>.
*/
package io.jawg.osmcontributor.rest;
import org.greenrobot.eventbus.EventBus;
import javax.inject.Inject;
import io.jawg.osmcontributor.rest.events.error.ServerNotAvailableEvent;
import io.jawg.osmcontributor.rest.events.error.SyncUnauthorizedEvent;
import io.jawg.osmcontributor.rest.events.error.TooManyRequestsEvent;
import retrofit.RetrofitError;
import timber.log.Timber;
public class OSMProxy {
private EventBus eventBus;
@Inject
public OSMProxy(EventBus eventBus) {
this.eventBus = eventBus;
}
public interface NetworkAction<T> {
T proceed();
}
public interface Result<T> {
boolean isSuccess();
T getResult();
RetrofitError getRetrofitError();
}
public class Success<T> implements Result<T> {
final T result;
public Success(T result) {
this.result = result;
}
@Override
public boolean isSuccess() {
return true;
}
@Override
public T getResult() {
return result;
}
@Override
public RetrofitError getRetrofitError() {
return null;
}
}
public class Failure<T> implements Result<T> {
final RetrofitError retrofitError;
public Failure(RetrofitError retrofitError) {
this.retrofitError = retrofitError;
}
public RetrofitError getRetrofitError() {
return retrofitError;
}
@Override
public boolean isSuccess() {
return false;
}
@Override
public T getResult() {
throw new IllegalStateException();
}
}
public <NA> Result<NA> proceed(NetworkAction<NA> action) throws RetrofitError {
try {
return new Success<>(action.proceed());
} catch (RetrofitError e) {
if (e.getKind() == RetrofitError.Kind.NETWORK) {
Timber.e(e, "Retrofit error, connection lost");
return new Failure<>(e);
} else if (e.getResponse() != null) {
switch (e.getResponse().getStatus()) {
case 401:
Timber.e(e, "Retrofit error, user unauthorized");
eventBus.post(new SyncUnauthorizedEvent());
return new Failure<>(null);
case 503:
Timber.e(e, "Retrofit error, server not available");
eventBus.post(new ServerNotAvailableEvent());
return new Failure<>(null);
case 429:
Timber.e(e, "Retrofit error, Too Many Requests");
eventBus.post(new TooManyRequestsEvent());
return new Failure<>(null);
}
}
return new Failure<>(e);
}
}
}