private void doGetAction(JsonValues values, PrintWriter writer) {
DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
Gson gson = new Gson();
String log = new String();
Filter keyFilter =
new FilterPredicate("random", FilterOperator.GREATER_THAN_OR_EQUAL, getRandomLong());
// TODO: fix filtering of expansions
/*
TreeSet<String> missingExpansions= new TreeSet<String>();
for (Expansion expansion : values.expansions) {
if (expansion.present == false) {
Filter filter = new FilterPredicate(expansion.name,
FilterOperator.NOT_EQUAL,
true);
keyFilter = CompositeFilterOperator.and(keyFilter, filter);
missingExpansions.add(expansion.name);
}
}
writer.println(keyFilter.toString());
*/
Query q = new Query("Record").setFilter(keyFilter).addSort("random", SortDirection.ASCENDING);
/*
q.addSort("random", SortDirection.ASCENDING);
for (String missingExpansion : missingExpansions) {
q.addSort(missingExpansion, SortDirection.ASCENDING);
}
*/
PreparedQuery pq = datastore.prepare(q);
Iterator<Entity> entityIterator = pq.asIterable().iterator();
if (entityIterator.hasNext() == false) {
q = new Query("Record").addSort("random", SortDirection.ASCENDING);
pq = datastore.prepare(q);
entityIterator = pq.asIterable().iterator();
if (entityIterator.hasNext() == false) {
throw new RuntimeException("no data in datastore");
}
}
Entity record = entityIterator.next();
JsonValues resultValues = entityToJsonValues(record);
resultValues.debug = log;
String result = gson.toJson(resultValues);
writer.println(result);
}
private JsonValues entityToJsonValues(Entity entity) {
Gson gson = new Gson();
JsonValues values = new JsonValues();
values.deck = gson.fromJson(entity.getKey().getName(), Deck.class);
long total = 0;
long count = 0;
for (long rating = 1; rating <= 5; rating++) {
long ratingCount = 0;
String ratingKey = getRatingKey(rating);
if (entity.hasProperty(ratingKey)) {
ratingCount = (long) entity.getProperty(ratingKey);
}
count += ratingCount;
total += ratingCount * rating;
}
values.rating = ((double) total) / count;
return values;
}