def getIds(self, redisConn, lat, lon, radius, store = False ):
res = None
for r in self.resolutions:
if r >= radius:
res = r
break
if not res:
logging.warn("Radius too big for available resolutions")
return []
closest = set()
if radius > 0 and radius <= self.RES_128KM:
bitres = self.BIT_RESOLUTIONS[res]
cell = self.getGeocell(lat, lon, bitres)
closest.add(self.getKey(res, cell))
p = Point(lat, lon)
with TimeSampler(None, 'collecting cells'):
for bearing in (0, 45, 90, 135, 180, 225, 270, 315):
dest = p.destination(bearing, math.sqrt(2 * (radius**2)) if bearing % 90 else radius)
cell = self.getGeocell(dest.latitude, dest.longitude, self.BIT_RESOLUTIONS[res])
closest.add(self.getKey(res, cell))
tmpKey = 'box:%s:%s,%s' % (self.className, lat,lon)
if not store:
redisConn.zunionstore(tmpKey, list(closest))
return redisConn.zrevrange(tmpKey, 0, -1, withscores=True)
else:
return list(closest)
return [] if not store else None
