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/*
* Copyright 2020 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.speedlimit;
import org.traccar.Context;
import org.traccar.helper.UnitsConverter;
import javax.json.JsonArray;
import javax.json.JsonObject;
import javax.ws.rs.client.AsyncInvoker;
import javax.ws.rs.client.InvocationCallback;
public class OverpassSpeedLimitProvider implements SpeedLimitProvider {
private final String url;
public OverpassSpeedLimitProvider(String url) {
this.url = url + "?data=[out:json];way[maxspeed](around:100.0,%f,%f);out%%20tags;";
}
private Double parseSpeed(String value) {
if (value.endsWith(" mph")) {
return UnitsConverter.knotsFromMph(Double.parseDouble(value.substring(0, value.length() - 4)));
} else if (value.endsWith(" knots")) {
return Double.parseDouble(value.substring(0, value.length() - 6));
} else if (value.matches("\\d+")) {
return UnitsConverter.knotsFromKph(Double.parseDouble(value));
} else {
return null;
}
}
@Override
public void getSpeedLimit(double latitude, double longitude, SpeedLimitProviderCallback callback) {
String formattedUrl = String.format(url, latitude, longitude);
AsyncInvoker invoker = Context.getClient().target(formattedUrl).request().async();
invoker.get(new InvocationCallback<JsonObject>() {
@Override
public void completed(JsonObject json) {
JsonArray elements = json.getJsonArray("elements");
if (!elements.isEmpty()) {
Double maxSpeed = parseSpeed(
elements.getJsonObject(0).getJsonObject("tags").getString("maxspeed"));
if (maxSpeed != null) {
callback.onSuccess(maxSpeed);
} else {
callback.onFailure(new SpeedLimitException("Parsing failed"));
}
} else {
callback.onFailure(new SpeedLimitException("Not found"));
}
}
@Override
public void failed(Throwable throwable) {
callback.onFailure(throwable);
}
});
}
}
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