class MarkerView(object):
'''
static method MarkersUtils to manipulate markers
'''
def __init__(self):
self.marker = Marker
self.utils = Utils()
@staticmethod
def _parse_google_maps_bounds(bounds):
'''
parses the bound string and produces a list of the
type [s, w, n, e]
:param bounds: bounds as string from google map
getBounds method
'''
characters_to_remove = ['(', ')', ' ']
for c in characters_to_remove:
bounds = bounds.replace(c, '')
return map(float, bounds.split(','))
@staticmethod
def _parse_location(markers):
'''
converts point-based marker location into dict with lat, lon keys
:param markers: markers objects to be parsed. Note that the
dict markers is mutated within the method
'''
for marker in markers:
_location = marker['location']
marker['location'] = {'lat': _location.x, 'lon': _location.y}
@staticmethod
def _parse_markers_object(markers_object):
'''
parse markers objects to a list of dictionaries
:param markers_object: list of markers object from db
'''
markers = map(model_to_dict, markers_object)
return markers
def get_markers_from_db(self, bounds):
'''
get markers from db based on bounds
:param bounds: bounds as string from google map
getBounds method
'''
bounds_points = self._parse_google_maps_bounds(bounds)
polygon = self.utils.generate_bounds_polygon(bounds_points)
markers_object = self.utils.get_markers_within(polygon)
markers = self._parse_markers_object(markers_object)
self._parse_location(markers)
return markers
def __init__(self):
self.marker = Marker
self.utils = Utils()
