class Router(object):
def __init__(self):
self.mongodb_database_connection = MongodbDatabaseConnection(host=mongodb_host, port=mongodb_port)
log(module_name='Router', log_type='DEBUG', log_message='mongodb_database_connection: established')
def get_bus_stop(self, name=None, provided_point=None, longitude=None, latitude=None):
"""
Get a bus_stop_document.
:param name: string
:param provided_point: Point
:param longitude: float
:param latitude: float
:return: bus_stop: bus_stop_document
"""
bus_stop = None
if name is not None:
bus_stop = self.mongodb_database_connection.find_bus_stop_document(name=name)
elif provided_point is not None:
bus_stop_documents = self.mongodb_database_connection.find_bus_stop_documents()
bus_stop = self.get_bus_stop_closest_to_point(
bus_stop_documents=bus_stop_documents,
provided_point=provided_point
)
elif longitude is not None and latitude is not None:
point = Point(longitude=longitude, latitude=latitude)
bus_stop_documents = self.mongodb_database_connection.find_bus_stop_documents()
bus_stop = self.get_bus_stop_closest_to_point(
bus_stop_documents=bus_stop_documents,
provided_point=point
)
else:
pass
return bus_stop
@staticmethod
def get_bus_stop_closest_to_point(bus_stop_documents, provided_point):
"""
Get the bus stop which is closest to a geographic point.
:param bus_stop_documents: [bus_stop_document]
:param provided_point: Point
:return closest_bus_stop: bus_stop_document
"""
minimum_distance = float('Inf')
closest_bus_stop = None
for bus_stop_document in bus_stop_documents:
bus_stop_document_point = bus_stop_document.get('point')
current_distance = distance(
point_one=provided_point,
longitude_two=bus_stop_document_point.get('longitude'),
latitude_two=bus_stop_document_point.get('latitude')
)
if current_distance == 0:
closest_bus_stop = bus_stop_document
break
elif current_distance < minimum_distance:
minimum_distance = current_distance
closest_bus_stop = bus_stop_document
else:
pass
return closest_bus_stop
def get_bus_stops(self, names):
"""
Get multiple bus_stop_documents.
:param names: [string]
:return: bus_stops: [bus_stop_document]
"""
bus_stops = []
# for name in names:
# bus_stop = self.get_bus_stop(name=name)
# bus_stops.append(bus_stop)
bus_stop_documents = self.mongodb_database_connection.find_bus_stop_documents(names=names)
bus_stop_documents_dictionary = {}
for bus_stop_document in bus_stop_documents:
bus_stop_document_name = bus_stop_document.get('name')
bus_stop_documents_dictionary[bus_stop_document_name] = bus_stop_document
for name in names:
bus_stop_document = bus_stop_documents_dictionary.get(name)
bus_stops.append(bus_stop_document)
return bus_stops
def get_bus_stops_dictionary(self):
"""
Retrieve a dictionary containing all the documents of the BusStops collection.
:return: bus_stops_dictionary: {name -> {'_id', 'osm_id', 'name', 'point': {'longitude', 'latitude'}}}
"""
bus_stops_dictionary = self.mongodb_database_connection.find_bus_stop_documents(in_dictionary=True)
return bus_stops_dictionary
def get_bus_stops_list(self):
"""
Retrieve a list containing all the documents of the BusStops collection.
:return: bus_stops_list: [{'_id', 'osm_id', 'name', 'point': {'longitude', 'latitude'}}]
"""
bus_stops_list = self.mongodb_database_connection.find_bus_stop_documents()
return bus_stops_list
def get_edges_dictionary(self):
"""
Retrieve a dictionary containing all the documents of the Edges collection.
:return: {starting_node_osm_id -> [{'_id', 'starting_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'ending_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'max_speed', 'road_type', 'way_id', 'traffic_density'}]}
"""
edges_dictionary = self.mongodb_database_connection.find_edge_documents(in_dictionary=True)
return edges_dictionary
def get_edges_list(self):
"""
Retrieve a list containing all the documents of the Edges collection.
:return: edges_list: [{'_id', 'starting_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'ending_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'max_speed', 'road_type', 'way_id', 'traffic_density'}]
"""
edges_list = self.mongodb_database_connection.find_edge_documents()
return edges_list
def get_points_dictionary(self):
"""
Retrieve a dictionary containing all the documents of the Points collection.
:return points_dictionary: {osm_id -> {'_id', 'osm_id', 'point': {'longitude', 'latitude'}}}
"""
points_dictionary = self.mongodb_database_connection.find_point_documents(in_dictionary=True)
return points_dictionary
def get_route_between_two_bus_stops(self, starting_bus_stop=None, ending_bus_stop=None,
starting_bus_stop_name=None, ending_bus_stop_name=None,
edges_dictionary=None):
"""
Identify the less time-consuming route between two bus_stops.
:param starting_bus_stop: bus_stop_document
:param ending_bus_stop: bus_stop_document
:param starting_bus_stop_name: string
:param ending_bus_stop_name: string
:param edges_dictionary: {starting_node_osm_id -> [edge_document]}
:return response: get_route_between_two_bus_stops
"""
if starting_bus_stop is None and starting_bus_stop_name is not None:
starting_bus_stop = self.get_bus_stop(name=starting_bus_stop_name)
if ending_bus_stop is None and ending_bus_stop_name is not None:
ending_bus_stop = self.get_bus_stop(name=ending_bus_stop_name)
if edges_dictionary is None:
edges_dictionary = self.get_edges_dictionary()
route = identify_path_with_lowest_cost(
start=starting_bus_stop,
end=ending_bus_stop,
edges_dictionary=edges_dictionary
)
response = {
'starting_bus_stop': starting_bus_stop,
'ending_bus_stop': ending_bus_stop,
'route': route
}
return response
def get_route_between_multiple_bus_stops(self, bus_stops=None, bus_stop_names=None):
"""
Identify the less time-consuming route between multiple bus_stops.
:param bus_stops: [bus_stop_document]
:param bus_stop_names: string
:return response: get_route_between_multiple_bus_stops
"""
response = []
edges_dictionary = self.get_edges_dictionary()
if bus_stops is None and bus_stop_names is not None:
bus_stops = self.get_bus_stops(names=bus_stop_names)
for i in range(0, len(bus_stops) - 1):
starting_bus_stop = bus_stops[i]
ending_bus_stop = bus_stops[i + 1]
intermediate_route = self.get_route_between_two_bus_stops(
starting_bus_stop=starting_bus_stop,
ending_bus_stop=ending_bus_stop,
edges_dictionary=edges_dictionary
)
response.append(intermediate_route)
return response
def get_waypoints_between_two_bus_stops(self, starting_bus_stop=None, ending_bus_stop=None,
starting_bus_stop_name=None, ending_bus_stop_name=None):
"""
Identify all possible route connections between two bus_stops.
:param starting_bus_stop: bus_stop_document
:param ending_bus_stop: bus_stop_document
:param starting_bus_stop_name: string
:param ending_bus_stop_name: string
:return response: get_waypoints_between_two_bus_stops
"""
if starting_bus_stop is None and starting_bus_stop_name is not None:
starting_bus_stop = self.get_bus_stop(name=starting_bus_stop_name)
if ending_bus_stop is None and ending_bus_stop_name is not None:
ending_bus_stop = self.get_bus_stop(name=ending_bus_stop_name)
edges_dictionary = self.get_edges_dictionary()
waypoints = identify_all_paths(
starting_node_osm_id=starting_bus_stop.get('osm_id'),
ending_node_osm_id=ending_bus_stop.get('osm_id'),
edges_dictionary=edges_dictionary
)
response = {
'starting_bus_stop': starting_bus_stop,
'ending_bus_stop': ending_bus_stop,
'waypoints': waypoints
}
return response
def get_waypoints_between_multiple_bus_stops(self, bus_stops=None, bus_stop_names=None):
"""
Identify all possible route connections between multiple bus_stops.
:param bus_stops: [bus_stop_document]
:param bus_stop_names: string
:return response: get_waypoints_between_multiple_bus_stops
"""
response = []
if bus_stops is None and bus_stop_names is not None:
bus_stops = self.get_bus_stops(names=bus_stop_names)
edges_dictionary = self.get_edges_dictionary()
for i in range(0, len(bus_stops) - 1):
starting_bus_stop = bus_stops[i]
ending_bus_stop = bus_stops[i + 1]
waypoints = identify_all_paths(
starting_node_osm_id=starting_bus_stop.get('osm_id'),
ending_node_osm_id=ending_bus_stop.get('osm_id'),
edges_dictionary=edges_dictionary
)
intermediate_response = {
'starting_bus_stop': starting_bus_stop,
'ending_bus_stop': ending_bus_stop,
'waypoints': waypoints
}
response.append(intermediate_response)
return response
class TrafficDataParser(object):
def __init__(self):
self.mongodb_database_connection = MongodbDatabaseConnection(host=mongodb_host, port=mongodb_port)
self.edge_documents = []
self.traffic_event_documents = []
self.minimum_latitude = float('inf')
self.maximum_latitude = float('-inf')
self.minimum_longitude = float('inf')
self.maximum_longitude = float('-inf')
log(module_name='traffic_data_parser', log_type='DEBUG',
log_message='mongodb_database_connection: established')
def check_borders_of_traffic_event_document(self, traffic_event_document):
"""
Check if a traffic_event_document corresponds to the operation area, by comparing their borders.
If yes, then return True. Otherwise, False.
:param traffic_event_document: traffic_event_document
:return: included_in_borders: bool
"""
included_in_borders = True
traffic_event_point_document = traffic_event_document.get('point')
traffic_event_longitude = traffic_event_point_document.get('longitude')
traffic_event_latitude = traffic_event_point_document.get('latitude')
if (traffic_event_longitude < self.minimum_longitude or traffic_event_longitude > self.maximum_longitude or
traffic_event_latitude < self.minimum_latitude or traffic_event_latitude > self.maximum_latitude):
included_in_borders = False
return included_in_borders
@staticmethod
def estimate_traffic_density_value(event_level):
"""
Estimate the traffic_density_value based on the event_level.
:param event_level: int
:return: traffic_density_value: float
"""
if event_level == 1:
traffic_density_value = 0.2
elif event_level == 2:
traffic_density_value = 0.4
elif event_level == 3:
traffic_density_value = 0.6
elif event_level == 4:
traffic_density_value = 0.8
else:
traffic_density_value = 0.0
return traffic_density_value
def get_borders_of_operation_area(self):
"""
Get the minimum and maximum values for longitude and latitude of the operation area.
:return: borders: {'minimum_latitude', 'maximum_latitude', 'minimum_longitude', 'maximum_longitude'}
"""
if len(self.edge_documents) == 0:
self.retrieve_edge_documents()
self.set_borders_of_operation_area()
borders = {
'minimum_latitude': self.minimum_latitude,
'maximum_latitude': self.maximum_latitude,
'minimum_longitude': self.minimum_longitude,
'maximum_longitude': self.maximum_longitude
}
return borders
@staticmethod
def get_edge_document_with_minimum_distance(traffic_event_document, edge_documents):
"""
Get the edge_document which corresponds to the nearest point of a traffic_event.
:param traffic_event_document: traffic_event_document
:param edge_documents: [edge_document]
:return:
"""
edge_document_with_minimum_distance = None
minimum_distance = float('Inf')
traffic_event_point_document = traffic_event_document.get('point')
traffic_event_longitude = traffic_event_point_document.get('longitude')
traffic_event_latitude = traffic_event_point_document.get('latitude')
traffic_event_point = Point(
longitude=traffic_event_longitude,
latitude=traffic_event_latitude
)
for edge_document in edge_documents:
starting_node = edge_document.get('starting_node')
starting_node_point_document = starting_node.get('point')
starting_node_point = Point(
longitude=starting_node_point_document.get('longitude'),
latitude=starting_node_point_document.get('latitude')
)
ending_node = edge_document.get('ending_node')
ending_node_point_document = ending_node.get('point')
ending_node_point = Point(
longitude=ending_node_point_document.get('longitude'),
latitude=ending_node_point_document.get('latitude')
)
distance_of_starting_node = distance(
point_one=traffic_event_point,
point_two=starting_node_point
)
distance_of_ending_node = distance(
point_one=traffic_event_point,
point_two=ending_node_point
)
distance_of_edge_document = distance_of_starting_node + distance_of_ending_node
if distance_of_edge_document < minimum_distance:
edge_document_with_minimum_distance = edge_document
minimum_distance = distance_of_edge_document
return edge_document_with_minimum_distance
def retrieve_edge_documents(self):
self.edge_documents = self.mongodb_database_connection.find_edge_documents()
def retrieve_traffic_event_documents(self):
self.traffic_event_documents = self.mongodb_database_connection.find_traffic_event_documents()
def set_borders_of_operation_area(self):
"""
Set the minimum and maximum values for longitude and latitude of the operation area.
:return: None
"""
for edge_document in self.edge_documents:
starting_node = edge_document.get('starting_node')
starting_node_point_document = starting_node.get('point')
starting_node_longitude = starting_node_point_document.get('longitude')
starting_node_latitude = starting_node_point_document.get('latitude')
if starting_node_longitude < self.minimum_longitude:
self.minimum_longitude = starting_node_longitude
if starting_node_longitude > self.maximum_longitude:
self.maximum_longitude = starting_node_longitude
if starting_node_latitude < self.minimum_latitude:
self.minimum_latitude = starting_node_latitude
if starting_node_latitude > self.maximum_latitude:
self.maximum_latitude = starting_node_latitude
ending_node = edge_document.get('ending_node')
ending_node_point_document = ending_node.get('point')
ending_node_longitude = ending_node_point_document.get('longitude')
ending_node_latitude = ending_node_point_document.get('latitude')
if ending_node_longitude < self.minimum_longitude:
self.minimum_longitude = ending_node_longitude
if ending_node_longitude > self.maximum_longitude:
self.maximum_longitude = ending_node_longitude
if ending_node_latitude < self.minimum_latitude:
self.minimum_latitude = ending_node_latitude
if ending_node_latitude > self.maximum_latitude:
self.maximum_latitude = ending_node_latitude
def update_traffic_data(self):
"""
:return: None
"""
self.retrieve_edge_documents()
self.retrieve_traffic_event_documents()
self.set_borders_of_operation_area()
for traffic_event_document in self.traffic_event_documents:
if self.check_borders_of_traffic_event_document(traffic_event_document=traffic_event_document):
edge_document_with_minimum_distance = self.get_edge_document_with_minimum_distance(
traffic_event_document=traffic_event_document,
edge_documents=self.edge_documents
)
traffic_density_value = self.estimate_traffic_density_value(
event_level=traffic_event_document.get('event_level')
)
self.mongodb_database_connection.update_traffic_density(
edge_object_id=edge_document_with_minimum_distance.get('_id'),
new_traffic_density_value=traffic_density_value
)
else:
print 'traffic_event_document: out_of_borders -', traffic_event_document
class TrafficDataParser(object):
def __init__(self):
self.mongodb_database_connection = MongodbDatabaseConnection(host=mongodb_host, port=mongodb_port)
self.edge_documents = []
self.traffic_event_documents = []
self.minimum_longitude = float("inf")
self.maximum_longitude = float("-inf")
self.minimum_latitude = float("inf")
self.maximum_latitude = float("-inf")
log(module_name="traffic_data_parser", log_type="DEBUG", log_message="mongodb_database_connection: established")
def check_borders_of_traffic_event_document(self, traffic_event_document):
"""
Check if a traffic_event_document corresponds to the operation area, by comparing their borders.
If yes, then return True. Otherwise, False.
traffic_event_document: {
'_id', 'event_id', 'event_type', 'event_level', 'point': {'longitude', 'latitude'}, 'datetime'
}
:param traffic_event_document: traffic_event_document
:return: included_in_borders: bool
"""
included_in_borders = True
traffic_event_point_document = traffic_event_document.get("point")
traffic_event_longitude = traffic_event_point_document.get("longitude")
traffic_event_latitude = traffic_event_point_document.get("latitude")
if (
traffic_event_longitude < self.minimum_longitude
or traffic_event_longitude > self.maximum_longitude
or traffic_event_latitude < self.minimum_latitude
or traffic_event_latitude > self.maximum_latitude
):
included_in_borders = False
return included_in_borders
@staticmethod
def estimate_traffic_density_value(event_level):
"""
Estimate the traffic_density_value based on the event_level.
:param event_level: int
:return: traffic_density_value: float
"""
if event_level == 1:
traffic_density_value = 0.2
elif event_level == 2:
traffic_density_value = 0.4
elif event_level == 3:
traffic_density_value = 0.6
elif event_level == 4:
traffic_density_value = 0.8
else:
traffic_density_value = 0.0
return traffic_density_value
@staticmethod
def get_edge_document_with_minimum_distance(traffic_event_document, edge_documents):
"""
Get the edge_document which corresponds to the nearest point of a traffic_event.
edge_document: {
'_id', 'starting_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'ending_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'max_speed', 'road_type', 'way_id', 'traffic_density'
}
traffic_event_document: {
'_id', 'event_id', 'event_type', 'event_level', 'point': {'longitude', 'latitude'}, 'datetime'
}
:param traffic_event_document: traffic_event_document
:param edge_documents: [edge_document]
:return:
"""
edge_document_with_minimum_distance = None
minimum_distance = float("Inf")
traffic_event_point_document = traffic_event_document.get("point")
traffic_event_longitude = traffic_event_point_document.get("longitude")
traffic_event_latitude = traffic_event_point_document.get("latitude")
traffic_event_point = Point(longitude=traffic_event_longitude, latitude=traffic_event_latitude)
for edge_document in edge_documents:
starting_node = edge_document.get("starting_node")
starting_node_point_document = starting_node.get("point")
starting_node_point = Point(
longitude=starting_node_point_document.get("longitude"),
latitude=starting_node_point_document.get("latitude"),
)
ending_node = edge_document.get("ending_node")
ending_node_point_document = ending_node.get("point")
ending_node_point = Point(
longitude=ending_node_point_document.get("longitude"),
latitude=ending_node_point_document.get("latitude"),
)
distance_of_starting_node = distance(point_one=traffic_event_point, point_two=starting_node_point)
distance_of_ending_node = distance(point_one=traffic_event_point, point_two=ending_node_point)
distance_of_edge_document = distance_of_starting_node + distance_of_ending_node
if distance_of_edge_document < minimum_distance:
edge_document_with_minimum_distance = edge_document
minimum_distance = distance_of_edge_document
return edge_document_with_minimum_distance
def set_borders_of_operation_area(self, edge_documents):
"""
Set the minimum and maximum values for longitude and latitude of the operation area.
edge_document: {
'_id', 'starting_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'ending_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'max_speed', 'road_type', 'way_id', 'traffic_density'
}
:param edge_documents: [edge_document]
:return: None
"""
for edge_document in edge_documents:
starting_node = edge_document.get("starting_node")
starting_node_point_document = starting_node.get("point")
starting_node_longitude = starting_node_point_document.get("longitude")
starting_node_latitude = starting_node_point_document.get("latitude")
if starting_node_longitude < self.minimum_longitude:
self.minimum_longitude = starting_node_longitude
if starting_node_longitude > self.maximum_longitude:
self.maximum_longitude = starting_node_longitude
if starting_node_latitude < self.minimum_latitude:
self.minimum_latitude = starting_node_latitude
if starting_node_latitude > self.maximum_latitude:
self.maximum_latitude = starting_node_latitude
ending_node = edge_document.get("ending_node")
ending_node_point_document = ending_node.get("point")
ending_node_longitude = ending_node_point_document.get("longitude")
ending_node_latitude = ending_node_point_document.get("latitude")
if ending_node_longitude < self.minimum_longitude:
self.minimum_longitude = ending_node_longitude
if ending_node_longitude > self.maximum_longitude:
self.maximum_longitude = ending_node_longitude
if ending_node_latitude < self.minimum_latitude:
self.minimum_latitude = ending_node_latitude
if ending_node_latitude > self.maximum_latitude:
self.maximum_latitude = ending_node_latitude
def update_traffic_data(self):
"""
edge_document: {
'_id', 'starting_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'ending_node': {'osm_id', 'point': {'longitude', 'latitude'}},
'max_speed', 'road_type', 'way_id', 'traffic_density'
}
traffic_event_document: {
'_id', 'event_id', 'event_type', 'event_level', 'point': {'longitude', 'latitude'}, 'datetime'
}
:return: None
"""
self.edge_documents = self.mongodb_database_connection.find_edge_documents()
self.traffic_event_documents = self.mongodb_database_connection.find_traffic_event_documents()
self.set_borders_of_operation_area(edge_documents=self.edge_documents)
for traffic_event_document in self.traffic_event_documents:
if self.check_borders_of_traffic_event_document(traffic_event_document=traffic_event_document):
edge_document_with_minimum_distance = self.get_edge_document_with_minimum_distance(
traffic_event_document=traffic_event_document, edge_documents=self.edge_documents
)
traffic_density_value = self.estimate_traffic_density_value(
event_level=traffic_event_document.get("event_level")
)
self.mongodb_database_connection.update_traffic_density(
edge_object_id=edge_document_with_minimum_distance.get("_id"),
new_traffic_density_value=traffic_density_value,
)
else:
print "traffic_event_document: out_of_borders -", traffic_event_document
class TrafficDataParser(object):
def __init__(self):
self.mongodb_database_connection = MongodbDatabaseConnection(
host=mongodb_host, port=mongodb_port)
self.edge_documents = []
self.traffic_event_documents = []
self.minimum_latitude = float('inf')
self.maximum_latitude = float('-inf')
self.minimum_longitude = float('inf')
self.maximum_longitude = float('-inf')
log(module_name='traffic_data_parser',
log_type='DEBUG',
log_message='mongodb_database_connection: established')
def check_borders_of_traffic_event_document(self, traffic_event_document):
"""
Check if a traffic_event_document corresponds to the operation area, by comparing their borders.
If yes, then return True. Otherwise, False.
:param traffic_event_document: traffic_event_document
:return: included_in_borders: bool
"""
included_in_borders = True
traffic_event_point_document = traffic_event_document.get('point')
traffic_event_longitude = traffic_event_point_document.get('longitude')
traffic_event_latitude = traffic_event_point_document.get('latitude')
if (traffic_event_longitude < self.minimum_longitude
or traffic_event_longitude > self.maximum_longitude
or traffic_event_latitude < self.minimum_latitude
or traffic_event_latitude > self.maximum_latitude):
included_in_borders = False
return included_in_borders
@staticmethod
def estimate_traffic_density_value(event_level):
"""
Estimate the traffic_density_value based on the event_level.
:param event_level: int
:return: traffic_density_value: float
"""
if event_level == 1:
traffic_density_value = 0.2
elif event_level == 2:
traffic_density_value = 0.4
elif event_level == 3:
traffic_density_value = 0.6
elif event_level == 4:
traffic_density_value = 0.8
else:
traffic_density_value = 0.0
return traffic_density_value
def get_borders_of_operation_area(self):
"""
Get the minimum and maximum values for longitude and latitude of the operation area.
:return: borders: {'minimum_latitude', 'maximum_latitude', 'minimum_longitude', 'maximum_longitude'}
"""
if len(self.edge_documents) == 0:
self.retrieve_edge_documents()
self.set_borders_of_operation_area()
borders = {
'minimum_latitude': self.minimum_latitude,
'maximum_latitude': self.maximum_latitude,
'minimum_longitude': self.minimum_longitude,
'maximum_longitude': self.maximum_longitude
}
return borders
@staticmethod
def get_edge_document_with_minimum_distance(traffic_event_document,
edge_documents):
"""
Get the edge_document which corresponds to the nearest point of a traffic_event.
:param traffic_event_document: traffic_event_document
:param edge_documents: [edge_document]
:return:
"""
edge_document_with_minimum_distance = None
minimum_distance = float('Inf')
traffic_event_point_document = traffic_event_document.get('point')
traffic_event_longitude = traffic_event_point_document.get('longitude')
traffic_event_latitude = traffic_event_point_document.get('latitude')
traffic_event_point = Point(longitude=traffic_event_longitude,
latitude=traffic_event_latitude)
for edge_document in edge_documents:
starting_node = edge_document.get('starting_node')
starting_node_point_document = starting_node.get('point')
starting_node_point = Point(
longitude=starting_node_point_document.get('longitude'),
latitude=starting_node_point_document.get('latitude'))
ending_node = edge_document.get('ending_node')
ending_node_point_document = ending_node.get('point')
ending_node_point = Point(
longitude=ending_node_point_document.get('longitude'),
latitude=ending_node_point_document.get('latitude'))
distance_of_starting_node = distance(point_one=traffic_event_point,
point_two=starting_node_point)
distance_of_ending_node = distance(point_one=traffic_event_point,
point_two=ending_node_point)
distance_of_edge_document = distance_of_starting_node + distance_of_ending_node
if distance_of_edge_document < minimum_distance:
edge_document_with_minimum_distance = edge_document
minimum_distance = distance_of_edge_document
return edge_document_with_minimum_distance
def retrieve_edge_documents(self):
self.edge_documents = self.mongodb_database_connection.find_edge_documents(
)
def retrieve_traffic_event_documents(self):
self.traffic_event_documents = self.mongodb_database_connection.find_traffic_event_documents(
)
def set_borders_of_operation_area(self):
"""
Set the minimum and maximum values for longitude and latitude of the operation area.
:return: None
"""
for edge_document in self.edge_documents:
starting_node = edge_document.get('starting_node')
starting_node_point_document = starting_node.get('point')
starting_node_longitude = starting_node_point_document.get(
'longitude')
starting_node_latitude = starting_node_point_document.get(
'latitude')
if starting_node_longitude < self.minimum_longitude:
self.minimum_longitude = starting_node_longitude
if starting_node_longitude > self.maximum_longitude:
self.maximum_longitude = starting_node_longitude
if starting_node_latitude < self.minimum_latitude:
self.minimum_latitude = starting_node_latitude
if starting_node_latitude > self.maximum_latitude:
self.maximum_latitude = starting_node_latitude
ending_node = edge_document.get('ending_node')
ending_node_point_document = ending_node.get('point')
ending_node_longitude = ending_node_point_document.get('longitude')
ending_node_latitude = ending_node_point_document.get('latitude')
if ending_node_longitude < self.minimum_longitude:
self.minimum_longitude = ending_node_longitude
if ending_node_longitude > self.maximum_longitude:
self.maximum_longitude = ending_node_longitude
if ending_node_latitude < self.minimum_latitude:
self.minimum_latitude = ending_node_latitude
if ending_node_latitude > self.maximum_latitude:
self.maximum_latitude = ending_node_latitude
def update_traffic_data(self):
"""
:return: None
"""
self.retrieve_edge_documents()
self.retrieve_traffic_event_documents()
self.set_borders_of_operation_area()
for traffic_event_document in self.traffic_event_documents:
if self.check_borders_of_traffic_event_document(
traffic_event_document=traffic_event_document):
edge_document_with_minimum_distance = self.get_edge_document_with_minimum_distance(
traffic_event_document=traffic_event_document,
edge_documents=self.edge_documents)
traffic_density_value = self.estimate_traffic_density_value(
event_level=traffic_event_document.get('event_level'))
self.mongodb_database_connection.update_traffic_density(
edge_object_id=edge_document_with_minimum_distance.get(
'_id'),
new_traffic_density_value=traffic_density_value)
else:
print 'traffic_event_document: out_of_borders -', traffic_event_document