From 628632ff5092f1e3cf6c968d9bdfbd9a24f59541 Mon Sep 17 00:00:00 2001
From: Marcin Zelent <marcin@zelent.net>
Date: Fri, 8 Jan 2021 19:47:37 +0100
Subject: Initial commit

---
 components/Map/Map.module.css |  28 ++++++++++
 components/Map/Map.tsx        | 121 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 149 insertions(+)
 create mode 100644 components/Map/Map.module.css
 create mode 100644 components/Map/Map.tsx

(limited to 'components/Map')

diff --git a/components/Map/Map.module.css b/components/Map/Map.module.css
new file mode 100644
index 0000000..b13f5d2
--- /dev/null
+++ b/components/Map/Map.module.css
@@ -0,0 +1,28 @@
+.popup {
+  width: auto;
+  min-height: 90%;
+}
+
+.popup .leaflet-popup-content {
+  margin: 0;
+}
+
+.markerIcon {
+  border: 2px solid #fff;
+  border-radius: 2px;
+  overflow: hidden;
+}
+
+.markerItemCount {
+  width: 18px;
+  height: 18px;
+  display: block;
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  border-radius: 10px;
+  background: #fff;
+  text-align: center;
+  font-weight: bold;
+}
diff --git a/components/Map/Map.tsx b/components/Map/Map.tsx
new file mode 100644
index 0000000..44f8ea6
--- /dev/null
+++ b/components/Map/Map.tsx
@@ -0,0 +1,121 @@
+import { LatLngBounds, DivIcon, Icon } from 'leaflet';
+import { useEffect, useState } from 'react';
+import ReactDom from 'react-dom/server';
+import { MapContainer, Marker, TileLayer, GeoJSON, ZoomControl } from 'react-leaflet';
+import MarkerClusterGroup from 'react-leaflet-markercluster';
+
+import { Trip, Photo } from 'models';
+import { distanceBetween } from 'lib/util';
+
+import 'leaflet/dist/leaflet.css';
+import styles from './Map.module.css';
+
+interface Props {
+  trip: Trip;
+  handleMarkerClick: (photo: string) => void;
+}
+
+export default function Map({ trip, handleMarkerClick }: Props): JSX.Element {
+  const [map, setMap] = useState(null);
+
+  const bounds = trip
+    ? new LatLngBounds(
+        [trip.track.bbox[1], trip.track.bbox[0]],
+        [trip.track.bbox[3], trip.track.bbox[2]],
+      )
+    : new LatLngBounds([75, -145], [-52, 145]);
+
+  function createMarkers(photos: Photo[]): JSX.Element[] {
+    // cluster photos that are close to each other
+    const clusters: Photo[][] = [];
+    for (let i = 0; i < photos.length; i += 1) {
+      if (clusters.filter((c) => c.includes(photos[i])).length === 0) {
+        const cluster = [photos[i]];
+        for (let j = 0; j < photos.length; j += 1) {
+          if (photos[i] !== photos[j]) {
+            const a = [photos[i].latitude, photos[i].longitude];
+            const b = [photos[j].latitude, photos[j].longitude];
+            const distance = distanceBetween(a, b);
+            if (distance < 10) cluster.push(photos[j]);
+          }
+        }
+        clusters.push(cluster);
+      }
+    }
+
+    // create React elements based on the clusters
+    const markers = clusters.map((cluster) => {
+      let Wrapper = ({ children }) => <>{children}</>;
+      if (cluster.length > 1) {
+        Wrapper = ({ children }) => (
+          <MarkerClusterGroup
+            iconCreateFunction={(markerCluster) =>
+              new DivIcon({
+                html: ReactDom.renderToString(
+                  <>
+                    <img
+                      style={{ width: 36, height: 36 }}
+                      src={`data:image/jpg;base64,${cluster[0].thumbnail}`}
+                      alt=""
+                    />
+                    <span className={styles.markerItemCount}>{markerCluster.getChildCount()}</span>
+                  </>,
+                ),
+                iconSize: [36, 36],
+                className: styles.markerIcon,
+              })
+            }
+          >
+            {children}
+          </MarkerClusterGroup>
+        );
+      }
+
+      const children = cluster.map((photo) => (
+        <Marker
+          key={photo.name}
+          position={[photo.latitude, photo.longitude]}
+          icon={
+            new Icon({
+              iconUrl: `data:image/jpg;base64,${photo.thumbnail}`,
+              iconSize: [36, 36],
+              className: styles.markerIcon,
+            })
+          }
+          eventHandlers={{ click: () => handleMarkerClick(photo.name) }}
+        />
+      ));
+
+      return <Wrapper key={cluster[0].name}>{children}</Wrapper>;
+    });
+
+    return markers;
+  }
+
+  useEffect(() => {
+    if (map) {
+      map.setView(bounds.getCenter());
+      map.fitBounds(bounds);
+    }
+  }, [trip]);
+
+  return (
+    <MapContainer
+      center={bounds.getCenter()}
+      bounds={bounds}
+      scrollWheelZoom
+      whenCreated={setMap}
+      style={{ height: '100%', width: '100%' }}
+      keyboard
+      zoomControl={false}
+    >
+      <ZoomControl position="bottomright" />
+      <TileLayer
+        attribution='&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
+        url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
+      />
+      {trip && <GeoJSON key={trip.name} data={trip.track} />}
+      {trip && createMarkers(trip.photos)}
+    </MapContainer>
+  );
+}
-- 
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