@Path("/events/{eventName}/icons/levels/{level}.png")
@GET
@Produces("image/png")
public Response getLevelIcon(
@PathParam("eventName") final String eventName, @PathParam("level") final String level) {
OperationResult<Event> eventResult = incogito.getEventByName(eventName);
if (!eventResult.isOk()) {
return toJsr311(eventResult);
}
Option<LevelId> levelOption = some(level).bind(Level.LevelId.valueOf);
if (!levelOption.isSome()) {
return toJsr311(OperationResult.<Object>notFound("Level '" + level + "' not known."));
}
Option<File> fileOption =
eventResult.value().levels.get(levelOption.some()).map(Level.iconFile_);
if (!fileOption.isSome()) {
return toJsr311(OperationResult.<Object>notFound("No icon for level '" + level + "'."));
}
// TODO: How about some caching here?
Option<byte[]> bytes =
join(
fileOption
.map(IO.<byte[]>runFileInputStream_().f(IO.ByteArrays.streamToByteArray))
.map(compose(P1.<Option<byte[]>>__1(), Callables.<byte[]>option())));
return toJsr311(fromOption(bytes, "Unable to read level file."), cacheForOneHourCacheControl);
}
public static <T> boolean contains(List<T> l, F<T, Boolean> f) {
Option<T> o = l.find(f);
return o.isSome();
}