def remove_from_geotree_by_key_name(cls, key_name, coord, gt_key_name=None, max_z=None):
"""this method removes mentionings of a point from geotree
coord is GeoPtProperty
the points itself is not changed (it may not even exist in datastore)
"""
#delete from native tile
if not gt_key_name:
gt_key_name = cls._GEO_TREE_KEY
if not max_z:
max_z = get_max_z(gt_key_name)
tile_str = tile_tuple_to_str(lat_lon_to_tile(coord.lat, coord.lon, max_z))
tile_key_name = '%s,%s' % (tile_str,gt_key_name)
logging.debug(tile_key_name)
t = Tile.get_by_key_name(tile_key_name)
points = json.loads(t.points_native)
for i in range(len(points)):
if points[i]['key_name'] == key_name:
del(points[i])
break
t.points_native = json.dumps(points)
t.put()
#mark this tile updated and update all tiles
gt = cls.get_by_key_name(gt_key_name)
tiles_updated = sorted_tiles_set(gt.tiles_updated)
tiles_updated.insert(tile_key_name)
gt.tiles_updated = list(tiles_updated)
#decrease points count
gt.number_points -= 1
gt.put()
gt.update_tiles()
def remove_point_by_key_name(cls, key_name, gt_key_name=None, max_z=None):
#delete from native tile
if not gt_key_name:
gt_key_name = cls._GEO_TREE_KEY
if not max_z:
max_z = get_max_z(gt_key_name)
p = Point.get_by_key_name(key_name)
tile_str = tile_tuple_to_str(lat_lon_to_tile(p.coord.lat, p.coord.lon, max_z))
tile_key_name = '%s,%s' % (tile_str,gt_key_name)
t = Tile.get_by_key_name(tile_key_name)
points = json.loads(t.points_native)
for i in range(len(points)):
if points[i]['key_name'] == key_name:
del(points[i])
break
t.points_native = json.dumps(points)
t.put()
#mark this tile updated and update all tiles
gt = cls.get_by_key_name(gt_key_name)
tiles_updated = sorted_tiles_set(gt.tiles_updated)
tiles_updated.insert(tile_key_name)
gt.tiles_updated = list(tiles_updated)
#decrease points count
gt.number_points -= 1
gt.put()
gt.update_tiles()
#delete point
p.delete()
def test_lat_lon_to_tile(self):
"""testing convertion of a point to tile
to come up with test cases refer to
http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/"""
lat = 48
lon = 37.7
z = 10
tile_calculated = geomath.lat_lon_to_tile(lat,lon,z)
tile_known = (619,355,10)
# make sure the tiles are the same
self.assertEqual(tile_calculated,tile_known)
def test_lat_lon_to_tile(self):
"""testing convertion of a point to tile
to come up with test cases refer to
http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/"""
lat = 48
lon = 37.7
z = 10
tile_calculated = geomath.lat_lon_to_tile(lat, lon, z)
tile_known = (619, 355, 10)
# make sure the tiles are the same
self.assertEqual(tile_calculated, tile_known)
def insert_to_tile(self, gt_key_name=None, max_z=None):
if not gt_key_name:
gt_key_name = GeoTree._GEO_TREE_KEY
if not max_z:
max_z = get_max_z(gt_key_name)
x,y,z = lat_lon_to_tile(self.coord.lat, self.coord.lon, max_z)
tile_key_name = '%d,%d,%d,%s' % (x,y,z,gt_key_name)
t = Tile.get_by_key_name(tile_key_name)
if not t:
t = Tile(x=x, y=y, z=z, key_name=tile_key_name, gt_key_name=gt_key_name)
point_dict = {'key_name':self.key().name(),'importance':self.importance,'coord':(self.coord.lat,self.coord.lon),'name':self.name}
if t.points_native:
# use sorted list because this is used during merging of tiles
points_native = sorted_points_list(json.loads(t.points_native))
points_native.insert(point_dict)
t.points_native = json.dumps(points_native)
else:
points_native = [point_dict]
t.points_native = json.dumps(points_native)
t.put()
return tile_key_name
def update_importance(self, importance_new, gt_key_name=None, max_z=None):
"""updates importance of the point and the maximum zoom tile, other tiles are not updated"""
if not gt_key_name:
gt_key_name = GeoTree._GEO_TREE_KEY
if not max_z:
max_z = get_max_z(gt_key_name)
self.importance = importance_new
self.put()
x,y,z = lat_lon_to_tile(self.coord.lat, self.coord.lon, max_z)
tile_key_name = '%d,%d,%d,%s' % (x,y,z,gt_key_name)
t = Tile.get_by_key_name(tile_key_name)
if t:
if t.points_native:
points_native = json.loads(t.points_native)
self_key_name = self.key().name()
for p in points_native:
if p['key_name'] == self_key_name:
p['importance'] = importance_new
t.points_native = json.dumps(sorted_points_list(points_native))
break
t.put()
GeoTree.mark_tile_updated(tile_key_name, gt_key_name)
