public JSONObject filterPlacesRandomly(
JSONObject placesJSONObject, int finalPlacesNumberPerRequest, List<String> place_ids) {
JSONObject initialJSON = (JSONObject) placesJSONObject.clone();
JSONObject finalJSONObject = new JSONObject();
int numberFields = placesJSONObject.size();
int remainingPlaces = finalPlacesNumberPerRequest;
int keywordsProcessed = 0;
Set<String> keywords = initialJSON.keySet();
for (String keyword : keywords) {
JSONArray placesForKeyword = (JSONArray) initialJSON.get(keyword);
JSONArray finalPlacesForKeyword = new JSONArray();
int placesForKeywordSize = placesForKeyword.size();
int maxPlacesToKeepInFinalJSON = remainingPlaces / (numberFields - keywordsProcessed);
int placesToKeepInFinalJSON = Math.min(maxPlacesToKeepInFinalJSON, placesForKeywordSize);
remainingPlaces -= placesToKeepInFinalJSON;
for (int i = 0; i < placesToKeepInFinalJSON; i++) {
int remainingPlacesInJSONArray = placesForKeyword.size();
int randomElementPosInArray = (new Random()).nextInt(remainingPlacesInJSONArray);
JSONObject temp = (JSONObject) placesForKeyword.remove(randomElementPosInArray);
place_ids.add((String) temp.get("place_id"));
finalPlacesForKeyword.add(temp);
}
finalJSONObject.put(keyword, finalPlacesForKeyword);
keywordsProcessed++;
}
return finalJSONObject;
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
JSONParser parser = new JSONParser();
String originalRouteJsonString = request.getParameter("originalroutejsontext");
JSONObject originalRouteJsonObject = (JSONObject) parser.parse(originalRouteJsonString);
JSONObject routes = (JSONObject) ((JSONArray) originalRouteJsonObject.get("routes")).get(0);
JSONArray legs = (JSONArray) routes.get("legs");
JSONArray steps = (JSONArray) ((JSONObject) legs.get(0)).get("steps");
String routeID = request.getParameter("routeid");
// System.out.println("Route steps loaded in a JSONArray...size is " + steps.size());
List<Double> stepLats = new ArrayList<Double>();
List<Double> stepLngs = new ArrayList<Double>();
for (int i = 0; i < steps.size(); i++) {
JSONObject temp = (JSONObject) ((JSONObject) steps.get(i)).get("end_location");
// System.out.println("Lat of end_location of step " + i + " " + temp.get("lat"));
stepLats.add(Double.parseDouble(temp.get("lat").toString()));
stepLngs.add(Double.parseDouble(temp.get("lng").toString()));
}
// System.out.println("All steps set with size " + stepLngs.size() + " and " +
// stepLats.size());
// System.out.println("Skipping route boxer...");
// RouteBoxer routeBoxer = new RouteBoxer(stepLats, stepLngs,
// Double.parseDouble(request.getParameter("radius")));
// if(routeBoxer.getFlag())
// throw new RuntimeException("Could not create boxes for the route");
// List<Double> boxLats = routeBoxer.getLats();
// List<Double> boxLngs = routeBoxer.getLngs();
// System.out.println("Calculated boxes with number of lats " + boxLats.size() + " and number
// of lngs " + boxLngs.size());
double r = Double.parseDouble(request.getParameter("radius").toString());
int radius = r > RADIUS_TO_LOOK_FOR_PLACES ? RADIUS_TO_LOOK_FOR_PLACES : (int) r;
String[] types = request.getParameter("keywords").split(",");
System.out.println("Size of types is " + types.length);
JSONObject finalPlacesJSONObject = new JSONObject();
for (int j = 0; j < types.length; j++) {
JSONArray jsonArrayForType = new JSONArray();
for (int i = 0; i < stepLats.size(); i++) {
JSONObject placesAroundLocationJSONObject =
(JSONObject)
parser.parse(
GoogleMap.getPlacesAroundLocation(
stepLats.get(i), stepLngs.get(i), radius, types[j]));
JSONArray placesAroundLocationJSONArray =
(JSONArray) placesAroundLocationJSONObject.get("results");
if (!placesAroundLocationJSONArray.isEmpty()) {
jsonArrayForType.addAll(placesAroundLocationJSONArray);
}
}
finalPlacesJSONObject.put(types[j], jsonArrayForType);
}
List<String> place_ids = new ArrayList<String>();
finalPlacesJSONObject = removeDuplicatePlaces(finalPlacesJSONObject);
finalPlacesJSONObject =
filterPlacesRandomly(finalPlacesJSONObject, FINAL_PLACES_NUMBER_PER_REQUEST, place_ids);
// System.out.println("MAGIC " + place_ids.toString());
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
MemcacheService syncCache = MemcacheServiceFactory.getMemcacheService();
// add places as a property of original route entity
Entity originalRouteEntity =
datastore.get(KeyFactory.createKey("Route", Long.parseLong(routeID)));
Text placesJsonAsText = new Text(finalPlacesJSONObject.toJSONString());
originalRouteEntity.setProperty("placesJSON", placesJsonAsText);
datastore.put(originalRouteEntity);
// System.out.println("SUCCESS written places to datastore");
// add task for fetching place reviews to queue
QueueFactory.getDefaultQueue()
.add(
TaskOptions.Builder.withUrl("/waypointsreview")
.param("places", place_ids.toString()));
System.out.println("Task to get reviews added to queue");
// We cache the route entity
String cacheKey = "route-" + routeID;
syncCache.put(cacheKey, originalRouteEntity);
} catch (Exception e) {
System.out.println("ERROR " + e.getMessage());
e.printStackTrace();
}
}