feat: enhance map functionality by adding URL state management and event handling for view changes

src/app/projects/[id]/page.js

@@ -400,12 +400,12 @@ export default async function ProjectViewPage({ params }) {
 				<div className="mb-8">
 					{" "}
 					<Card>
-						<CardHeader>
-							<div className="flex items-center justify-between">
+						<CardHeader>							<div className="flex items-center justify-between">
 								<h2 className="text-xl font-semibold text-gray-900">
 									Project Location
 								</h2>
-								<Link href="/projects/map">
+								{project.coordinates && (
+									<Link href={`/projects/map?lat=${project.coordinates.split(',')[0].trim()}&lng=${project.coordinates.split(',')[1].trim()}&zoom=16`}>
 										<Button variant="outline" size="sm">
 											<svg
 												className="w-4 h-4 mr-2"
@@ -423,6 +423,7 @@ export default async function ProjectViewPage({ params }) {
 											View on Full Map
 										</Button>
 									</Link>
+								)}
 							</div>
 						</CardHeader>
 						<CardContent>

src/app/projects/map/page.js

@@ -3,6 +3,7 @@
 import React, { useEffect, useState } from "react";
 import Link from "next/link";
 import dynamic from "next/dynamic";
+import { useSearchParams, useRouter } from "next/navigation";
 import Button from "@/components/ui/Button";
 
 // Dynamically import the map component to avoid SSR issues
@@ -16,9 +17,12 @@ const DynamicMap = dynamic(() => import("@/components/ui/LeafletMap"), {
 });
 
 export default function ProjectsMapPage() {
+	const searchParams = useSearchParams();
+	const router = useRouter();
 	const [projects, setProjects] = useState([]);
 	const [loading, setLoading] = useState(true);
 	const [mapCenter, setMapCenter] = useState([50.0614, 19.9366]); // Default to Krakow, Poland
+	const [mapZoom, setMapZoom] = useState(10); // Default zoom level
 	const [statusFilters, setStatusFilters] = useState({
 		registered: true,
 		in_progress_design: true,
@@ -64,7 +68,6 @@ export default function ProjectsMapPage() {
 			  );
 		setStatusFilters(newState);
 	};
-
 	// Toggle status filter
 	const toggleStatusFilter = (status) => {
 		setStatusFilters((prev) => ({
@@ -72,8 +75,49 @@ export default function ProjectsMapPage() {
 			[status]: !prev[status],
 		}));
 	};
-	// Hide navigation and ensure full-screen layout
+	// Update URL with current map state (debounced to avoid too many updates)
+	const updateURL = (center, zoom) => {
+		const params = new URLSearchParams();
+		params.set('lat', center[0].toFixed(6));
+		params.set('lng', center[1].toFixed(6));
+		params.set('zoom', zoom.toString());
+		
+		// Use replace to avoid cluttering browser history
+		router.replace(`/projects/map?${params.toString()}`, { scroll: false });
+	};
+
+	// Handle map view changes with debouncing
+	const handleMapViewChange = (center, zoom) => {
+		setMapCenter(center);
+		setMapZoom(zoom);
+		
+		// Debounce URL updates to avoid too many history entries
+		clearTimeout(window.mapUpdateTimeout);
+		window.mapUpdateTimeout = setTimeout(() => {
+			updateURL(center, zoom);
+		}, 500); // Wait 500ms after the last move to update URL
+	};// Hide navigation and ensure full-screen layout
 	useEffect(() => {
+		// Check for URL parameters for coordinates and zoom
+		const lat = searchParams.get('lat');
+		const lng = searchParams.get('lng');
+		const zoom = searchParams.get('zoom');
+
+		if (lat && lng) {
+			const latitude = parseFloat(lat);
+			const longitude = parseFloat(lng);
+			if (!isNaN(latitude) && !isNaN(longitude)) {
+				setMapCenter([latitude, longitude]);
+			}
+		}
+
+		if (zoom) {
+			const zoomLevel = parseInt(zoom);
+			if (!isNaN(zoomLevel) && zoomLevel >= 1 && zoomLevel <= 20) {
+				setMapZoom(zoomLevel);
+			}
+		}
+
 		// Hide navigation bar for full-screen experience
 		const nav = document.querySelector("nav");
 		if (nav) {
@@ -83,7 +127,6 @@ export default function ProjectsMapPage() {
 		// Prevent scrolling on body
 		document.body.style.overflow = "hidden";
 		document.documentElement.style.overflow = "hidden";
-
 		// Cleanup when leaving page
 		return () => {
 			if (nav) {
@@ -91,15 +134,24 @@ export default function ProjectsMapPage() {
 			}
 			document.body.style.overflow = "";
 			document.documentElement.style.overflow = "";
-		};
-	}, []);
 			
+			// Clear any pending URL updates
+			if (window.mapUpdateTimeout) {
+				clearTimeout(window.mapUpdateTimeout);
+			}
+		};
+	}, [searchParams]);
 	useEffect(() => {
 		fetch("/api/projects")
 			.then((res) => res.json())
 			.then((data) => {
 				setProjects(data);
 
+				// Only calculate center based on projects if no URL parameters are provided
+				const lat = searchParams.get('lat');
+				const lng = searchParams.get('lng');
+				
+				if (!lat || !lng) {
 					// Calculate center based on projects with coordinates
 					const projectsWithCoords = data.filter((p) => p.coordinates);
 					if (projectsWithCoords.length > 0) {
@@ -121,6 +173,7 @@ export default function ProjectsMapPage() {
 
 						setMapCenter([avgLat, avgLng]);
 					}
+				}
 
 				setLoading(false);
 			})
@@ -128,7 +181,7 @@ export default function ProjectsMapPage() {
 				console.error("Error fetching projects:", error);
 				setLoading(false);
 			});
-	}, []);
+	}, [searchParams]);
 	// Convert projects to map markers with filtering
 	const markers = projects
 		.filter((project) => project.coordinates)
@@ -506,14 +559,14 @@ export default function ProjectsMapPage() {
 						</div>
 					</div>
 				</div>
-			) : (
-				<div className="absolute inset-0">
+			) : (				<div className="absolute inset-0">
 					<DynamicMap
 						center={mapCenter}
-						zoom={10}
+						zoom={mapZoom}
 						markers={markers}
 						showLayerControl={true}
 						defaultLayer="Polish Geoportal Orthophoto"
+						onViewChange={handleMapViewChange}
 					/>
 				</div>
 			)}

src/components/ui/LeafletMap.js

@@ -6,6 +6,7 @@ import {
 	Marker,
 	Popup,
 	LayersControl,
+	useMapEvents,
 } from "react-leaflet";
 import "leaflet/dist/leaflet.css";
 import { useEffect } from "react";
@@ -43,23 +44,44 @@ const createColoredMarkerIcon = (color) => {
 			popupAnchor: [1, -34],
 			shadowSize: [41, 41],
 		});
-	}
-	return null;
+	}	return null;
 };
 
+// Component to handle map events
+function MapEventHandler({ onViewChange }) {
+	const map = useMapEvents({
+		moveend: () => {
+			if (onViewChange) {
+				const center = map.getCenter();
+				const zoom = map.getZoom();
+				onViewChange([center.lat, center.lng], zoom);
+			}
+		},
+		zoomend: () => {
+			if (onViewChange) {
+				const center = map.getCenter();
+				const zoom = map.getZoom();
+				onViewChange([center.lat, center.lng], zoom);
+			}
+		},
+	});
+
+	return null;
+}
+
 export default function EnhancedLeafletMap({
 	center,
 	zoom = 13,
 	markers = [],
 	showLayerControl = true,
 	defaultLayer = "OpenStreetMap",
+	onViewChange,
 }) {
 	useEffect(() => {
 		fixLeafletIcons();
 	}, []);
 
 	const { BaseLayer } = LayersControl;
-
 	return (
 		<MapContainer
 			center={center}
@@ -67,6 +89,9 @@ export default function EnhancedLeafletMap({
 			style={{ height: "100%", width: "100%" }}
 			scrollWheelZoom={true}
 		>
+			{/* Handle map view changes */}
+			{onViewChange && <MapEventHandler onViewChange={onViewChange} />}
+			
 			{showLayerControl ? (
 				<LayersControl position="topright">
 					{mapLayers.base.map((layer, index) => (