# Copyright 2017 Google Inc. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import json from django.contrib.gis.geos import GEOSGeometry, Polygon from django.core.serializers import serialize from django.conf import settings from django.db import connection from django.http import HttpResponse from django.shortcuts import render from .models import Property def properties_geojson(request): """ Retrieves properties given the querystring params, and returns them as GeoJSON. """ ne = request.GET["ne"].split(",") sw = request.GET["sw"].split(",") lookup = { "point__contained": Polygon.from_bbox((sw[1], sw[0], ne[1], ne[0])), "bedrooms__gte": request.GET["min-bedrooms"], "bedrooms__lte": request.GET["max-bedrooms"], "bathrooms__gte": request.GET["min-bathrooms"], "car_spaces__gte": request.GET["min-car-spaces"], "property_type__in": request.GET["property-types"].split(",") } if request.GET["nearest-school"] != "1": lookup["nearest_school_distance__lt"] = int(request.GET["nearest-school"]) - 1 if request.GET["nearest-train-station"] != "1": lookup["nearest_train_station_distance__lt"] = int(request.GET["nearest-train-station"]) - 1 properties = Property.objects.filter(**lookup) json = serialize("geojson", properties, geometry_field="point") return HttpResponse(json, content_type="application/json") def properties_map(request): """ Index page for the app, with map + form for filtering properties. """ # Get the center of all properties, for centering the map. if Property.objects.exists(): cursor = connection.cursor() cursor.execute("SELECT ST_AsText(st_centroid(st_union(point))) FROM realty_property") center = dict(zip(("lng", "lat"), GEOSGeometry(cursor.fetchone()[0]).get_coords())) else: # Default, when no properties exist. center = {"lat": -33.864869, "lng": 151.1959212} context = { "center": json.dumps(center), "title": "Property Finder", "api_key": settings.GOOGLE_MAPS_API_WEB_KEY, "property_types": Property._meta.get_field("property_type").choices, "distance_range": (1, 21), } # Ranges for each of the slider fields. for field in ["bedrooms", "bathrooms", "car_spaces"]: choices = Property._meta.get_field("bedrooms").choices context[field + "_range"] = (choices[0][0], choices[-1][0]) return render(request, "map.html", context)