Cambios notables. Creadas interfaces para la tabla de capturing task

y la tabla de capturas.

Traslado todo lo relacionado a Geocoding a un servicio independiente
del capturer.

Replanteo totalmente el parseo del html, creando un objeto nuevo.

geocoder/geocoder.py

@@ -0,0 +1,94 @@
+import requests
+
+
+class GeocodingCache:
+
+    cache_max_size = 1000
+
+    def __init__(self):
+        self.geocoded_addresses = []
+
+    def address_in_cache(self, address):
+        """
+        Comprueba si la direccion ya esta en la cache
+        """
+        for geocoded_address in self.geocoded_addresses:
+            if geocoded_address['address'] == address:
+                return True
+        return False
+
+    def get_coordinates(self, address):
+        """
+        Recupera los datos asociados a la direccion
+        """
+        for geocoded_address in self.geocoded_addresses:
+            if geocoded_address['address'] == address:
+                return geocoded_address['latitude'], \
+                       geocoded_address['longitude'], \
+                       geocoded_address['precision']
+        return None
+
+    def add_address(self, address, latitude, longitude, precision):
+        """
+        Añade la direccion a la cache y le hace sitio si es necesario
+        """
+        if len(self.geocoded_addresses) >= cache_max_size:
+            self.geocoded_addresses.pop()
+
+        self.geocoded_addresses.insert(0, {'address': address,
+                                           'latitude': latitude,
+                                           'longitude': longitude,
+                                           'precision': precision})
+
+
+class GeocodingTask:
+
+    url = 'https://maps.googleapis.com/maps/api/geocode/json'
+
+    request_parameters = {'region': 'es',
+                          'key': 'AIzaSyCnKj0WnsxVZcaoxeAYkuRw3cKRNGiISYA'}
+
+    geocoding_status_success = ['OK']
+    geocoding_status_surrender = ['ZERO_RESULTS']
+    geocoding_status_retry = ['OVER_QUERY_LIMIT',
+                                   'REQUEST_DENIED',
+                                   'INVALID_REQUEST',
+                                   'UNKNOWN_ERROR']
+
+    def __init__(self, address):
+        request_paremeters['address'] = address
+
+    def geocode(self):
+        """
+        Lanza la peticion de gecoding al servicio de google
+        """
+        self.response = requests.get(url, request_parameters)
+        self.response_json = self.response.json()
+
+    def get_request_status(self):
+        """
+        Devuelve el status HTTP de la request
+        """
+        return self.response.status_code
+
+    def success_surrender_retry(self):
+        """
+        Devuelve el estado del resultado desde el punto de vista de Google
+        """
+        if self.response_json['status'] in geocoding_status_success:
+            return "Success"
+        elif self.response_json['status'] in geocoding_status_surrender:
+            return "Surrender"
+        else:
+            return "Retry"
+
+    def get_results(self):
+        """
+        Extrae los resultados del JSON de respuesta y los devuelve
+        """
+        results = {'latitude': self.response_json['results'][0]['geometry']['location']['lat'],
+                   'longitude': self.response_json['results'][0]['geometry']['location']['lon'],
+                   'precision': self.response_json['results'][0]['geometry']['location_type']}
+
+        return results
+