Frontend/sublet map

backend/market/models.py

@@ -1,6 +1,8 @@
 import hashlib
+import hmac
 import math
 
+from django.conf import settings
 from django.contrib.auth.models import AbstractUser
 from django.core.exceptions import ValidationError
 from django.core.validators import MinValueValidator
@@ -146,7 +148,11 @@ def _calculate_approximate_location(self, latitude, longitude):
 
         lat_str = f"{float(latitude):.9f}"
         lon_str = f"{float(longitude):.9f}"
-        seed = hashlib.md5(f"{lat_str}{lon_str}".encode()).hexdigest()
+        seed = hmac.new(
+            settings.SECRET_KEY.encode(),
+            f"{lat_str}{lon_str}".encode(),
+            hashlib.sha256,
+        ).hexdigest()
 
         offset_factor = int(seed[:8], 16) / 0xFFFFFFFF
 

backend/market/serializers.py

@@ -104,17 +104,26 @@ class SubletDataSerializer(ModelSerializer):
 
     class Meta:
         model = Sublet
-        fields = ["street_address", "beds", "baths", "start_date", "end_date",
-            "latitude", "longitude"]
+        fields = [
+            "street_address",
+            "beds",
+            "baths",
+            "start_date",
+            "end_date",
+            "latitude",
+            "longitude",
+        ]
 
     def get_latitude(self, obj):
-        if obj.approximate_location is not None:
-            return float(obj.approximate_location[0])
+        approx_lat, _ = obj.approximate_location
+        if approx_lat is not None:
+            return float(approx_lat)
         return None
 
     def get_longitude(self, obj):
-        if obj.approximate_location is not None:
-            return float(obj.approximate_location[1])
+        _, approx_lon = obj.approximate_location
+        if approx_lon is not None:
+            return float(approx_lon)
         return None
 
 # Unified serializer for all listing types (Items and Sublets); used for CRUD operations

frontend/components/listings/detail/ListingDetail.tsx

@@ -9,6 +9,7 @@ import { ListingImageGallery } from "@/components/listings/detail/ListingImageGa
 import { ListingInfo } from "@/components/listings/detail/ListingInfo";
 import { UserCard } from "@/components/listings/detail/UserCard";
 import { BackButton } from "@/components/listings/detail/BackButton";
+import { SubletMap } from "@/components/listings/detail/SubletMap";
 
 interface Props {
   listing: Item | Sublet;
@@ -55,6 +56,11 @@ export const ListingDetail = ({ listing, initialIsFavorited }: Props) => {
     toggleFavoriteMutation.mutate(!isFavorited);
   };
 
+  const subletCoords =
+    listingType === "sublet" ? listing.additional_data : null;
+  const hasLocation =
+    subletCoords?.latitude != null && subletCoords?.longitude != null;
+
   return (
     <div className="mx-auto flex w-full max-w-[96rem] flex-col p-8 px-4 sm:px-12">
       <div className="mb-4 flex items-center justify-between">
@@ -83,6 +89,20 @@ export const ListingDetail = ({ listing, initialIsFavorited }: Props) => {
             {...listing.additional_data}
           />
           <UserCard user={listing.seller} label={listingOwnerLabel} />
+          {hasLocation && (
+            <div className="space-y-3">
+              <div>
+                <h2 className="text-lg font-semibold">{"Where you'll be living"}</h2>
+                <p className="text-sm text-gray-500">
+                  Approximate location shown. The exact location will be shared once you connect with the owner.
+                </p>
+                </div>
+              <SubletMap
+                latitude={subletCoords.latitude!}
+                longitude={subletCoords.longitude!}
+              />
+            </div>
+          )}
           <ListingActions
             listingId={listing.id}
             listingPrice={listing.price}

frontend/components/listings/detail/SubletMap.tsx

@@ -0,0 +1,18 @@
+"use client";
+
+import dynamic from "next/dynamic";
+
+interface Props {
+  latitude: number;
+  longitude: number;
+}
+
+const LazyMap = dynamic(
+  () =>
+    import("@/components/listings/detail/SubletMapContent").then((m) => m.SubletMapContent),
+  { ssr: false },
+);
+
+export const SubletMap = ({ latitude, longitude }: Props) => {
+  return <LazyMap latitude={latitude} longitude={longitude} />;
+};

frontend/components/listings/detail/SubletMapContent.tsx

@@ -0,0 +1,37 @@
+"use client";
+
+import "leaflet/dist/leaflet.css";
+import { MapContainer, TileLayer, Circle } from "react-leaflet";
+
+interface Props {
+  latitude: number;
+  longitude: number;
+}
+
+const CIRCLE_RADIUS_METERS = 200;
+
+export const SubletMapContent = ({ latitude, longitude }: Props) => {
+  return (
+    <MapContainer
+      center={[latitude, longitude]}
+      zoom={15}
+      scrollWheelZoom={false}
+      className="z-0 h-72 w-full rounded-lg sm:h-80"
+    >
+      <TileLayer
+        attribution='&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
+        url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
+      />
+      <Circle
+        center={[latitude, longitude]}
+        radius={CIRCLE_RADIUS_METERS}
+        pathOptions={{
+          color: "#3b82f6",
+          fillColor: "#3b82f6",
+          fillOpacity: 0.2,
+          weight: 2,
+        }}
+      />
+    </MapContainer>
+  );
+};

frontend/lib/constants.ts

@@ -11,6 +11,7 @@ export const BASE_URL =
 
 export const API_BASE_URL =
   process.env.NODE_ENV === "production" ? "REPLACE WITH PROD API URL" : "http://backend:8000"; // can't be localhost because server fetch happens in container
+
 
 export const PLATFORM_URL = process.env.PLATFORM_URL;
 export const CLIENT_ID = process.env.CLIENT_ID;

frontend/lib/types.ts

@@ -40,12 +40,12 @@ export type ItemAdditionalData = {
 
 export type SubletAdditionalData = {
   street_address: string;
-  latitude: number;
-  longitude: number;
   beds: number;
   baths: number;
   start_date: string;
   end_date: string;
+  latitude: number;
+  longitude: number;
 };
 
 // ------------------------------------------------------------

frontend/package.json

@@ -28,6 +28,7 @@
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",
     "jose": "^3.20.4",
+    "leaflet": "^1.9.4",
     "lucide-react": "^0.546.0",
     "next": "15.5.4",
     "next-themes": "^0.4.6",
@@ -36,13 +37,15 @@
     "react-dom": "19.1.0",
     "react-hook-form": "^7.69.0",
     "react-intersection-observer": "^9.16.0",
+    "react-leaflet": "^5.0.0",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.3.1",
     "zod": "^4.2.1"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3",
     "@tailwindcss/postcss": "^4",
+    "@types/leaflet": "^1.9.21",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",