add spot clustering

assets/css/app.css

@@ -36,3 +36,81 @@ body.home-page main > div {
     max-width: none;
     height: 100%;
 }
+
+/* Marker cluster styles */
+.marker-cluster-small {
+    background-color: rgba(16, 185, 129, 0.8);
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+}
+.marker-cluster-small div {
+    background-color: rgba(16, 185, 129, 0.9);
+    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.3);
+}
+
+.marker-cluster-medium {
+    background-color: rgba(59, 130, 246, 0.8);
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+}
+.marker-cluster-medium div {
+    background-color: rgba(59, 130, 246, 0.9);
+    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.3);
+}
+
+.marker-cluster-large {
+    background-color: rgba(239, 68, 68, 0.8);
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+}
+.marker-cluster-large div {
+    background-color: rgba(239, 68, 68, 0.9);
+    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.3);
+}
+
+/* Custom cluster icon styles */
+.marker-cluster {
+    background-clip: padding-box;
+    border-radius: 50%;
+    border: 2px solid rgba(255, 255, 255, 0.8);
+}
+.marker-cluster div {
+    width: 30px;
+    height: 30px;
+    margin-left: 5px;
+    margin-top: 5px;
+    text-align: center;
+    border-radius: 50%;
+    font:
+        13px "Helvetica Neue",
+        Arial,
+        Helvetica,
+        sans-serif;
+    color: white;
+    font-weight: bold;
+    line-height: 30px;
+    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
+}
+.marker-cluster span {
+    line-height: 30px;
+}
+
+/* Cluster animations */
+.leaflet-cluster-anim .leaflet-marker-icon,
+.leaflet-cluster-anim .leaflet-marker-shadow {
+    transition:
+        transform 0.3s ease-out,
+        opacity 0.3s ease-out;
+}
+
+/* Hover effect for clusters */
+.marker-cluster:hover {
+    transform: scale(1.1);
+    z-index: 1000 !important;
+}
+
+/* APRS marker styles */
+.aprs-marker {
+    transition: transform 0.2s ease-out;
+}
+.aprs-marker:hover {
+    transform: scale(1.2);
+    z-index: 1000 !important;
+}

assets/js/app.js

@@ -40,6 +40,52 @@ Hooks.APRSMap = {
       maxZoom: 19,
     }).addTo(map);
 
+    // Check if MarkerCluster plugin is available
+    if (typeof L.markerClusterGroup === "function") {
+      // Create marker cluster group
+      this.markerClusterGroup = L.markerClusterGroup({
+        chunkedLoading: true,
+        maxClusterRadius: function (zoom) {
+          // Adjust cluster radius based on zoom level
+          // Tighter clustering when zoomed out, looser when zoomed in
+          if (zoom <= 5) return 120;
+          if (zoom <= 8) return 80;
+          if (zoom <= 11) return 60;
+          if (zoom <= 14) return 40;
+          return 20;
+        },
+        spiderfyOnMaxZoom: true,
+        showCoverageOnHover: true,
+        zoomToBoundsOnClick: true,
+        removeOutsideVisibleBounds: true,
+        animate: true,
+        animateAddingMarkers: true,
+        disableClusteringAtZoom: 16,
+        iconCreateFunction: function (cluster) {
+          const childCount = cluster.getChildCount();
+          let c = " marker-cluster-";
+          if (childCount < 10) {
+            c += "small";
+          } else if (childCount < 100) {
+            c += "medium";
+          } else {
+            c += "large";
+          }
+          return new L.DivIcon({
+            html: "<div><span>" + childCount + "</span></div>",
+            className: "marker-cluster" + c,
+            iconSize: new L.Point(40, 40),
+          });
+        },
+      });
+
+      // Add cluster group to map
+      map.addLayer(this.markerClusterGroup);
+    } else {
+      console.warn("Leaflet MarkerCluster plugin not loaded, falling back to regular markers");
+      this.markerClusterGroup = null;
+    }
+
     // Store markers to avoid duplicates
     this.markers = new Map();
     this.packetCount = 0;
@@ -88,10 +134,15 @@ Hooks.APRSMap = {
   },
 
   clearAllMarkers() {
-    // Remove all markers from the map
-    this.markers.forEach((marker) => {
-      this.map.removeLayer(marker);
-    });
+    // Remove all markers from the cluster group or map
+    if (this.markerClusterGroup) {
+      this.markerClusterGroup.clearLayers();
+    } else {
+      // Fallback: remove markers directly from map
+      this.markers.forEach((marker) => {
+        this.map.removeLayer(marker);
+      });
+    }
     this.markers.clear();
     this.packetCount = 0;
     const counterElement = document.getElementById("packet-count");
@@ -101,31 +152,25 @@ Hooks.APRSMap = {
   },
 
   removeMarkersOutsideBounds(bounds) {
-    // Remove markers that are outside the current bounds
-    const markersToRemove = [];
+    // With clustering, the cluster group handles visibility automatically
+    // We'll just track the count of markers within bounds
+    let visibleCount = 0;
 
     this.markers.forEach((marker, callsign) => {
       const latLng = marker.getLatLng();
-      if (!bounds.contains(latLng)) {
-        this.map.removeLayer(marker);
-        markersToRemove.push(callsign);
+      if (bounds.contains(latLng)) {
+        visibleCount++;
       }
     });
 
-    // Remove from our tracking map
-    markersToRemove.forEach((callsign) => {
-      this.markers.delete(callsign);
-      this.packetCount--;
-    });
-
-    // Update counter
+    // Update counter to show visible markers
     const counterElement = document.getElementById("packet-count");
     if (counterElement) {
-      counterElement.textContent = this.packetCount;
+      counterElement.textContent = visibleCount;
     }
 
     // Notify server of the updated packet count
-    this.pushEvent("update_packet_count", { count: this.packetCount });
+    this.pushEvent("update_packet_count", { count: visibleCount });
   },
 
   addPacketMarker(packet) {
@@ -168,8 +213,17 @@ Hooks.APRSMap = {
     if (this.markers.has(callsign)) {
       // Update existing marker
       const existingMarker = this.markers.get(callsign);
-      existingMarker.setLatLng([lat, lng]);
-      existingMarker.setPopupContent(popupContent);
+      if (this.markerClusterGroup) {
+        // Remove and re-add to cluster group
+        this.markerClusterGroup.removeLayer(existingMarker);
+        existingMarker.setLatLng([lat, lng]);
+        existingMarker.setPopupContent(popupContent);
+        this.markerClusterGroup.addLayer(existingMarker);
+      } else {
+        // Fallback: just update position
+        existingMarker.setLatLng([lat, lng]);
+        existingMarker.setPopupContent(popupContent);
+      }
     } else {
       // Create new marker
       const icon = this.createAPRSIcon(
@@ -177,7 +231,14 @@ Hooks.APRSMap = {
         packet["data_extended"]["symbol_code"] || ">",
       );
 
-      const marker = L.marker([lat, lng], { icon: icon }).addTo(this.map).bindPopup(popupContent);
+      const marker = L.marker([lat, lng], { icon: icon }).bindPopup(popupContent);
+
+      // Add to cluster group or directly to map
+      if (this.markerClusterGroup) {
+        this.markerClusterGroup.addLayer(marker);
+      } else {
+        marker.addTo(this.map);
+      }
 
       this.markers.set(callsign, marker);
       console.log("New marker added for:", callsign, "Total markers:", this.markers.size);
@@ -206,6 +267,9 @@ Hooks.APRSMap = {
 
   destroyed() {
     console.log("APRSMap hook destroyed");
+    if (this.markerClusterGroup) {
+      this.markerClusterGroup.clearLayers();
+    }
     if (this.map) {
       console.log("Removing map instance");
       this.map.remove();

lib/aprs_web/controllers/page_html/map.html.heex

@@ -4,6 +4,14 @@
   integrity="sha256-kLaT2GOSpHechhsozzB+flnD+zUyjE2LlfWPgU04xyI="
   crossorigin=""
 />
+<link
+  rel="stylesheet"
+  href="https://unpkg.com/leaflet.markercluster@1.5.3/dist/MarkerCluster.css"
+/>
+<link
+  rel="stylesheet"
+  href="https://unpkg.com/leaflet.markercluster@1.5.3/dist/MarkerCluster.Default.css"
+/>
 <!-- Make sure you put this AFTER Leaflet's CSS -->
 <script
   src="https://unpkg.com/leaflet@1.9.3/dist/leaflet.js"
@@ -11,5 +19,9 @@
   crossorigin=""
 >
 </script>
+<script
+  src="https://unpkg.com/leaflet.markercluster@1.5.3/dist/leaflet.markercluster.js"
+>
+</script>
 
 <div id="map"></div>

lib/aprs_web/live/map_live/index.ex

@@ -118,12 +118,22 @@ defmodule AprsWeb.MapLive.Index do
       integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY="
       crossorigin=""
     />
+    <link
+      rel="stylesheet"
+      href="https://unpkg.com/leaflet.markercluster@1.5.3/dist/MarkerCluster.css"
+    />
+    <link
+      rel="stylesheet"
+      href="https://unpkg.com/leaflet.markercluster@1.5.3/dist/MarkerCluster.Default.css"
+    />
     <script
       src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"
       integrity="sha256-20nQCchB9co0qIjJZRGuk2/Z9VM+kNiyxNV1lvTlZBo="
       crossorigin=""
     >
     </script>
+    <script src="https://unpkg.com/leaflet.markercluster@1.5.3/dist/leaflet.markercluster.js">
+    </script>
 
     <style>
       #aprs-map {