first steps for georestricted search results

products/utils.py

@@ -7,6 +7,8 @@ from django.contrib.postgres.search import SearchQuery, SearchRank, SearchVector
 from django.db.models import Max, Min
 from django.conf import settings
 from django.utils import timezone
+from django.contrib.gis.geos import Point
+from django.contrib.gis.measure import D
 
 import requests
 
@@ -124,7 +126,7 @@ def get_related_products(product):
     return total_results[:10]
 
 
-def ranked_product_search(keyword, shipping_cost=None, discount=None, category=None, tags=None, price_min=None,price_max=None):
+def ranked_product_search(keyword, shipping_cost=None, discount=None, category=None, tags=None, price_min=None,price_max=None, coordinates=None):
     """
     Ranked product search
 
@@ -134,6 +136,12 @@ def ranked_product_search(keyword, shipping_cost=None, discount=None, category=N
 
     allow filtering by:
     - shipping cost
+
+    Response includes:
+    - result_set
+    - min_price
+    - max_price
+    - georesult
     """
     vector = SearchVector('name') + SearchVector('description') + SearchVector('tags__label') + SearchVector('attributes__label') + SearchVector('category__label') + SearchVector('company__company_name')
     query = SearchQuery(keyword)
@@ -142,6 +150,24 @@ def ranked_product_search(keyword, shipping_cost=None, discount=None, category=N
         rank=SearchRank(vector, query)
     ).filter(rank__gt=0.05, active=True)
 
+    # geolocation filtering
+    if coordinates is not None:
+        point = Point(coordinates)
+        filtered_qs = products_qs.filter(geo__distance_lte=(point, D(km=10)))
+        georesult = '10k'
+        if filtered_qs.count() <= 10:
+            products_qs = products_qs.filter(geo__distance_lte=(point, D(km=50)))
+            georesult = '50k'
+        if filtered_qs.count() <= 10:
+            products_qs = products_qs.filter(geo__distance_lte=(point, D(km=200)))
+            georesult = '200k'
+        if filtered_qs.count > 10:
+            products_qs = filtered_qs
+        else:
+            georesult = None
+    else:
+        georesult = None
+
     # filter by category
     if category is not None:
         products_qs = products_qs.filter(category=category)
@@ -183,7 +209,7 @@ def ranked_product_search(keyword, shipping_cost=None, discount=None, category=N
     max_price = products_qs.aggregate(Max('price'))
 
 
-    return set(products_qs), min_price, max_price
+    return set(products_qs), min_price, max_price, georesult
 
 
 def product_loader(csv_reader, user, company=None):

products/views.py

@@ -19,6 +19,7 @@ from rest_framework.decorators import api_view, permission_classes, action
 from rest_framework.filters import OrderingFilter
 
 from django_filters.rest_framework import DjangoFilterBackend
+
 import requests
 
 from history.models import HistorySync
@@ -28,7 +29,7 @@ from products.models import Product, CategoryTag
 from products.serializers import ProductSerializer, TagFilterSerializer, SearchResultSerializer
 from companies.models import Company
 from stats.models import StatsLog
-from back_latienda.permissions import IsCreator, IsSiteAdmin, ReadOnly
+from back_latienda.permissions import IsCreator, IsSiteAdmin
 from .utils import extract_search_filters, ranked_product_search, product_loader, get_related_products
 from utils.tag_serializers import TaggitSerializer
 from utils.tag_filters import ProductTagFilter, ProductOrderFilter
@@ -125,8 +126,8 @@ def product_search(request):
 
     Params:
     - q: used for search [MANDATORY]
-    - limit: max number of returned instances [OPTIONAL]
-    - offset: where to start counting results [OPTIONAL]
+    - limit: max number of returned instances
+    - offset: where to start counting results
     - shipping_cost: true/false
     - discount: true/false
     - category: string
@@ -134,6 +135,7 @@ def product_search(request):
     - order: string (newest/oldest)
     - price_min: int
     - price_max: int
+    - geo: {'longitude': 23.23, 'latitude': 23432.23423}
 
     In the response:
     - filters
@@ -163,6 +165,11 @@ def product_search(request):
             discount = False
         else:
             discount = None
+    geo = request.GET.get('geo', None)
+    if geo is not None:
+        coordinates = (geo.get('longitude'), geo.get('latitude'))
+    else:
+        coordinates = None
     category = request.GET.get('category', None)
     tags = request.GET.get('tags', None)
     price_min = request.GET.get('price_min', None)
@@ -195,7 +202,7 @@ def product_search(request):
             # split query string into single words
             chunks = q.split(' ')
             for chunk in chunks:
-                product_set, min_price, max_price  = ranked_product_search(chunk, shipping_cost, discount, category, tags, price_min, price_max)
+                product_set, min_price, max_price, georesult  = ranked_product_search(chunk, shipping_cost, discount, category, tags, price_min, price_max, coordinates)
                 # update price values
                 if product_set:
                     if prices['min'] is None or min_price['price__min'] < prices['min']: