deps: react-leaflet 1.8 -> 4.2 (+ leaflet 1.9) — the last legacy react-* lib

Ground-up hooks rewrite of the app's core map. Removes the final batch of
React-19-blocking warnings (legacy context on Map/LayersControl/TileLayer/
Marker/CircleMarker/Circle/Tooltip + ReactDOM.render from the old controls).

Core: <Map> -> <MapContainer>; .leafletElement refs (6 files) -> the map/
layer instances directly, via a <MapReady> child (useMap) + plain refs on
Marker/Circle/GeoJSON; controlled viewport (onViewportChanged + state.center/
zoom) -> <MapEvents> (useMapEvents moveend/zoomend) + imperative setView;
onClick -> eventHandlers={{click}}; Path styling -> pathOptions/style;
subsUnion takes the L.Map directly.

The 4 v1-only plugins reimplemented (new in-repo helpers under Maps/):
- react-leaflet-control -> MapControl (L.Control + createPortal)
- react-leaflet-google  -> GoogleMutantLayer (createLayerComponent +
  leaflet.gridlayer.googlemutant; Google Maps API already loaded by Gkeys)
- react-leaflet-fullscreen -> createControlComponent + leaflet.fullscreen
- leaflet-sleep / leaflet-graphicscale kept as vanilla (work on leaflet 1.9)

Browser-verified: /fires (tiles, OSM+Google layer switch, custom control,
fullscreen, graphic scale, pan/zoom -> re-fetch, no NaN), fire detail
(GeoJSON rect + fitBounds), home (3 maps coexist; SelectionMap draggable
marker -> updatePosition + distance circle). Console now shows 0 React
warnings on home/fires. REST smoke byte-identical.

imports/ui/components/Maps/DefMapLayers.js

@@ -5,7 +5,7 @@
 import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import { withTranslation } from 'react-i18next';
-import { GoogleLayer } from 'react-leaflet-google/lib/';
+import GoogleMutantLayer from '/imports/ui/components/Maps/GoogleMutantLayer';
 import Gkeys from '/imports/startup/client/Gkeys';
 import { TileLayer, LayersControl } from 'react-leaflet';
 
@@ -54,15 +54,15 @@ class DefMapLayers extends Component {
         {/* React.Fragment does not work here */}
         { this.state.gkey &&
         <BaseLayer name={t('Mapa de carreteras de Google')}>
-          <GoogleLayer opacity={defOpacity} googlekey={this.state.gkey} maptype="ROADMAP" />
+          <GoogleMutantLayer opacity={defOpacity} maptype="ROADMAP" />
         </BaseLayer> }
         { this.state.gkey &&
           <BaseLayer name={t('Mapa de terreno de Google')} checked={this.props.terrain}>
-            <GoogleLayer opacity={defOpacity} googlekey={this.state.gkey} maptype="TERRAIN" />
+            <GoogleMutantLayer opacity={defOpacity} maptype="TERRAIN" />
           </BaseLayer> }
         { this.state.gkey &&
           <BaseLayer name={t('Mapa de satélite de Google')} checked={this.props.satellite}>
-            <GoogleLayer opacity={defOpacity} googlekey={this.state.gkey} maptype="SATELLITE" />
+            <GoogleMutantLayer opacity={defOpacity} maptype="SATELLITE" />
           </BaseLayer> }
       </LayersControl>
     );

imports/ui/components/Maps/FireCircleMark.js

@@ -31,7 +31,7 @@ class FireCircleMark extends Component {
     } = this.props;
     const rect = rectangleAround({ lat, lon }, track, track);
     return (
-      <GeoJSON data={rect} color="red" stroke width="1" opacity=".4" fillOpacity="1">
+      <GeoJSON data={rect} style={{ color: 'red', stroke: true, weight: 1, opacity: 0.4, fillOpacity: 1 }}>
         <FirePopup t={t} history={history} id={id} nasa={nasa} lat={lat} lon={lon} when={when} />
       </GeoJSON>
     );

imports/ui/components/Maps/FireIconMark.js

@@ -33,9 +33,9 @@ class FireIconMark extends Component {
       lat, lon, scan, track, nasa, id, history, falsePositives, industries, neighbour, when, t
     } = this.props;
     return (
-      <div>
+      <Fragment>
         { !falsePositives && !industries &&
-          <Marker position={[lat, lon]} icon={nasa ? this.getIcon(scan) : nFireIcon} onClick={this.onClick} >
+          <Marker position={[lat, lon]} icon={nasa ? this.getIcon(scan) : nFireIcon} eventHandlers={{ click: this.onClick }} >
             <FirePopup t={t} history={history} id={id} nasa={nasa} lat={lat} lon={lon} when={when} />
           </Marker> }
         { industries && <Marker position={[lat, lon]} icon={regIndustryIcon}>
@@ -43,23 +43,20 @@ class FireIconMark extends Component {
                         </Marker> }
         { /* disabled */ industries && false && <CircleMarker
           center={[lat, lon]}
-          color="violet"
-          stroke={false}
-          fillOpacity="1"
-          fill
           radius={1}
+          pathOptions={{ color: 'violet', stroke: false, fillOpacity: 1, fill: true }}
         />}
         { falsePositives && !industries &&
-        <Marker position={[lat, lon]} icon={industryIcon} onClick={this.onClick}>
+        <Marker position={[lat, lon]} icon={industryIcon} eventHandlers={{ click: this.onClick }}>
           <Tooltip><Fragment>{t('Es una industria (fuente: nuestros usuarios/as)')}</Fragment></Tooltip>
           { /* disabled because was a past fire (and can be marked multiple times) */ false && <FirePopup t={t} history={history} id={id} lat={lat} lon={lon} /> }
         </Marker>
           }
         { !falsePositives && !industries &&
-        <CircleMarker center={[lat, lon]} color={nasa ? 'red' : '#D35400'} stroke={false} fillOpacity="1" fill radius={1} onClick={this.onClick}>
+        <CircleMarker center={[lat, lon]} radius={1} pathOptions={{ color: nasa ? 'red' : '#D35400', stroke: false, fillOpacity: 1, fill: true }} eventHandlers={{ click: this.onClick }}>
           <FirePopup t={t} history={history} id={id} nasa={nasa} lat={lat} lon={lon} when={when} />
         </CircleMarker> }
-      </div>
+      </Fragment>
     );
   }
 }

imports/ui/components/Maps/FirePixel.js

@@ -12,11 +12,8 @@ const FirePixel = ({
 }) => (
   <CircleMarker
         center={[lat, lon]}
-        color={nasa ? 'red' : '#D35400'}
-        stroke={false}
-        fillOpacity="1"
-        fill
         radius={nasa ? 1 : 2}
+        pathOptions={{ color: nasa ? 'red' : '#D35400', stroke: false, fillOpacity: 1, fill: true }}
   >
     <FirePopup t={t} history={history} id={id} nasa={nasa} lat={lat} lon={lon} when={when} />
   </CircleMarker>

imports/ui/components/Maps/FirePolygonMark.js

@@ -29,7 +29,7 @@ class FirePolygonMark extends Component {
     const lon = centerid.coordinates[0];
     const lat = centerid.coordinates[1];
     return (
-      <GeoJSON data={shape} color="orange" stroke width="1" opacity=".2" fillOpacity=".0" />
+      <GeoJSON data={shape} style={{ color: 'orange', stroke: true, weight: 1, opacity: 0.2, fillOpacity: 0 }} />
     );
     /* <FirePopup t={t} history={history} id={id} nasa={nasa} lat={lat} lon={lon} when={when} /> */
   }

imports/ui/components/Maps/FullScreenMap.js

@@ -1,25 +1,27 @@
 /* eslint-disable react/jsx-indent-props */
 /* eslint-disable import/no-absolute-path */
-/* eslint-disable import/no-absolute-path */
 
-import React, { Component } from 'react';
+import React from 'react';
 import PropTypes from 'prop-types';
 import { withTranslation } from 'react-i18next';
-import FullscreenControl from 'react-leaflet-fullscreen';
-import 'react-leaflet-fullscreen/dist/styles.css';
+import { createControlComponent } from '@react-leaflet/core';
+import L from 'leaflet';
+import 'leaflet.fullscreen';
+import 'leaflet.fullscreen/Control.FullScreen.css';
 
-class FullScreenMap extends Component {
-  render() {
-    const { t } = this.props;
-    return (
-      <FullscreenControl
-          position="topleft"
-          title={t('Pantalla completa')}
-          titleCancel={t('Salir de pantalla completa')}
-      />
-    );
-  }
-}
+// Replacement for react-leaflet-fullscreen (v1-only): wrap the vanilla
+// leaflet.fullscreen control with react-leaflet v4's control factory.
+const FullscreenControl = createControlComponent(
+  ({ position = 'topleft', title, titleCancel }) => L.control.fullscreen({ position, title, titleCancel })
+);
+
+const FullScreenMap = ({ t }) => (
+  <FullscreenControl
+      position="topleft"
+      title={t('Pantalla completa')}
+      titleCancel={t('Salir de pantalla completa')}
+  />
+);
 
 FullScreenMap.propTypes = {
   t: PropTypes.func.isRequired

imports/ui/components/Maps/GoogleMutantLayer.js

@@ -0,0 +1,25 @@
+import { createLayerComponent } from '@react-leaflet/core';
+import L from 'leaflet';
+import 'leaflet.gridlayer.googlemutant';
+
+// Replacement for react-leaflet-google's GoogleLayer (v1-only). The Google Maps
+// JS API is already loaded (with the places library) by Gkeys before any Google
+// BaseLayer renders, so googlemutant can use window.google.maps directly.
+function createGoogleMutant({
+  maptype = 'roadmap', opacity, googlekey, ...options
+}, ctx) {
+  const instance = L.gridLayer.googleMutant({
+    type: String(maptype).toLowerCase(),
+    ...(opacity != null ? { opacity } : {}),
+    ...options
+  });
+  return { instance, context: { ...ctx } };
+}
+
+function updateGoogleMutant(instance, props, prevProps) {
+  if (props.opacity != null && props.opacity !== prevProps.opacity) {
+    instance.setOpacity(props.opacity);
+  }
+}
+
+export default createLayerComponent(createGoogleMutant, updateGoogleMutant);

imports/ui/components/Maps/MapBridge.js

@@ -0,0 +1,22 @@
+import { useEffect } from 'react';
+import { useMap, useMapEvents } from 'react-leaflet';
+
+// v4 replaces the v1 `ref`/`.leafletElement` + handleLeafletLoad pattern: this
+// child runs inside <MapContainer> and hands the ready Leaflet map to a class
+// parent once, so the parent can drive it imperatively (setView, fitBounds,
+// graphicScale, subsUnion, …).
+export const MapReady = ({ onReady }) => {
+  const map = useMap();
+  useEffect(() => {
+    if (onReady) onReady(map);
+    // run once per map instance
+  }, [map]); // eslint-disable-line react-hooks/exhaustive-deps
+  return null;
+};
+
+// Bridges Leaflet map events to callbacks (replaces the v1 onMoveend /
+// onViewportChanged / onZoomend props on <Map>).
+export const MapEvents = ({ handlers }) => {
+  useMapEvents(handlers || {});
+  return null;
+};

imports/ui/components/Maps/MapControl.js

@@ -0,0 +1,32 @@
+import { useEffect, useState } from 'react';
+import { createPortal } from 'react-dom';
+import { useMap } from 'react-leaflet';
+import L from 'leaflet';
+
+// Replacement for react-leaflet-control (v1-only): mounts a Leaflet control at
+// the given corner and portals arbitrary React children into it. Click/scroll
+// on the control no longer pans/zooms the map underneath.
+const MapControl = ({ position = 'topright', children }) => {
+  const map = useMap();
+  const [container, setContainer] = useState(null);
+
+  useEffect(() => {
+    const ReactControl = L.Control.extend({
+      onAdd: () => {
+        const div = L.DomUtil.create('div', 'leaflet-control leaflet-control-react');
+        L.DomEvent.disableClickPropagation(div);
+        L.DomEvent.disableScrollPropagation(div);
+        setContainer(div);
+        return div;
+      },
+      onRemove: () => setContainer(null)
+    });
+    const control = new ReactControl({ position });
+    control.addTo(map);
+    return () => control.remove();
+  }, [map, position]);
+
+  return container ? createPortal(children, container) : null;
+};
+
+export default MapControl;

imports/ui/components/Maps/SubsUnion/SubsUnion.js

@@ -12,7 +12,8 @@ const subsUnion = (union, options) => {
   const interactive = options.interactive || false;
 
   if (options.subs) {
-    const lmap = options.map.leafletElement;
+    // v4: options.map is the Leaflet map instance directly (no .leafletElement)
+    const lmap = options.map;
     if (union) {
       lmap.removeLayer(union);
     }
@@ -30,7 +31,7 @@ const subsUnion = (union, options) => {
         if (options.fit && options.bounds) {
           // console.log(options.bounds);
           const bounds = JSON.parse(options.bounds);
-          options.map.leafletElement.fitBounds(L.latLngBounds(bounds._northEast, bounds._southWest));
+          lmap.fitBounds(L.latLngBounds(bounds._northEast, bounds._southWest));
         }
       } else if (options.subs.length > 0) {
         const result = calcUnion(L, options.subs, sub => sub, true);
@@ -43,7 +44,7 @@ const subsUnion = (union, options) => {
         });
         union.addTo(lmap);
         if (options.fit) {
-          options.map.leafletElement.fitBounds(bounds);
+          lmap.fitBounds(bounds);
         }
       }
     }