308 lines
9.7 KiB
TypeScript
308 lines
9.7 KiB
TypeScript
import { useCallback, useRef, useEffect, useState, useMemo, memo } from 'react';
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import { Map as MapGL, useControl } from 'react-map-gl/maplibre';
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import type { MapRef } from 'react-map-gl/maplibre';
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import { MapboxOverlay } from '@deck.gl/mapbox';
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import 'maplibre-gl/dist/maplibre-gl.css';
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import type {
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HexagonData,
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PostcodeFeature,
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PostcodeGeometry,
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ViewState,
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ViewChangeParams,
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POI,
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FeatureMeta,
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Bounds,
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} from '../../types';
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import { zoomToResolution, getBoundsFromViewState, getMapStyle } from '../../lib/map-utils';
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import { INITIAL_VIEW_STATE, MAP_MIN_ZOOM, MAP_BOUNDS } from '../../lib/consts';
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import LocationSearch, { type SearchedLocation } from './LocationSearch';
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import MapLegend from './MapLegend';
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import HoverCard from './HoverCard';
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import type { FeatureFilters } from '../../types';
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import { useDeckLayers, osmIdToUrl } from '../../hooks/useDeckLayers';
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import { MODE_LABELS, type TravelTimeEntry, travelFieldKey } from '../../hooks/useTravelTime';
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interface MapProps {
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data: HexagonData[];
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postcodeData: PostcodeFeature[];
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usePostcodeView: boolean;
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pois: POI[];
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onViewChange: (params: ViewChangeParams) => void;
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viewFeature: string | null;
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colorRange: [number, number] | null;
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filterRange: [number, number] | null;
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viewSource: 'drag' | 'eye' | null;
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onCancelPin: () => void;
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features: FeatureMeta[];
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selectedHexagonId: string | null;
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hoveredHexagonId: string | null;
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onHexagonClick: (id: string, isPostcode?: boolean, geometry?: PostcodeGeometry) => void;
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onHexagonHover: (h3: string | null, x?: number, y?: number) => void;
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initialViewState?: ViewState;
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theme?: 'light' | 'dark';
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screenshotMode?: boolean;
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ogMode?: boolean;
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filters?: FeatureFilters;
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selectedPostcodeGeometry?: PostcodeGeometry | null;
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onLocationSearched?: (location: SearchedLocation | null) => void;
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bounds?: Bounds | null;
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hideLegend?: boolean;
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travelTimeEntries?: TravelTimeEntry[];
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travelTimeColorRanges?: Map<number, [number, number]>;
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}
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const EMPTY_TRAVEL_ENTRIES: TravelTimeEntry[] = [];
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const EMPTY_TRAVEL_RANGES = new globalThis.Map<number, [number, number]>();
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interface Dimensions {
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width: number;
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height: number;
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}
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function DeckOverlay({
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layers,
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getTooltip,
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}: {
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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layers: any[];
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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getTooltip: any;
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}) {
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const overlay = useControl(() => new MapboxOverlay({ interleaved: true }));
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const prevLayersRef = useRef(layers);
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const prevTooltipRef = useRef(getTooltip);
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if (layers !== prevLayersRef.current || getTooltip !== prevTooltipRef.current) {
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prevLayersRef.current = layers;
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prevTooltipRef.current = getTooltip;
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overlay.setProps({ layers, getTooltip });
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}
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return null;
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}
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export default memo(function Map({
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data,
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postcodeData,
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usePostcodeView,
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pois,
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onViewChange,
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viewFeature,
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colorRange,
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filterRange,
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viewSource,
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onCancelPin,
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features,
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selectedHexagonId,
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hoveredHexagonId,
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onHexagonClick,
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onHexagonHover,
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initialViewState,
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theme = 'light',
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screenshotMode = false,
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ogMode = false,
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filters = {},
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selectedPostcodeGeometry,
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onLocationSearched,
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bounds: viewportBounds,
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hideLegend = false,
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travelTimeEntries = EMPTY_TRAVEL_ENTRIES,
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travelTimeColorRanges = EMPTY_TRAVEL_RANGES,
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}: MapProps) {
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const containerRef = useRef<HTMLDivElement>(null);
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const [viewState, setViewState] = useState<ViewState>(initialViewState || INITIAL_VIEW_STATE);
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const [dimensions, setDimensions] = useState<Dimensions>({ width: 0, height: 0 });
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useEffect(() => {
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const container = containerRef.current;
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if (!container) return;
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const observer = new ResizeObserver((entries) => {
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const { width, height } = entries[0].contentRect;
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if (width > 0 && height > 0) {
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setDimensions({ width, height });
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}
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});
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observer.observe(container);
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return () => observer.disconnect();
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}, []);
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useEffect(() => {
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if (dimensions.width === 0 || dimensions.height === 0) return;
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// Send exact viewport bounds - server will filter to only return
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// hexagons/postcodes that intersect this precise AABB
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const bounds = getBoundsFromViewState(viewState, dimensions.width, dimensions.height);
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const resolution = zoomToResolution(viewState.zoom);
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onViewChange({
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resolution,
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bounds,
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zoom: viewState.zoom,
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latitude: viewState.latitude,
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longitude: viewState.longitude,
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});
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}, [viewState, dimensions, onViewChange]);
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const handleMove = useCallback((evt: { viewState: ViewState }) => {
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setViewState(evt.viewState);
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}, []);
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const handleFlyTo = useCallback((lat: number, lng: number, zoom: number) => {
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setViewState((prev) => ({ ...prev, latitude: lat, longitude: lng, zoom }));
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}, []);
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const handleMapLoad = useCallback(
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(_evt: { target: MapRef['getMap'] extends () => infer M ? M : never }) => {
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// Road opacity is set in getMapStyle
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},
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[]
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);
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const mapStyle = useMemo(() => getMapStyle(theme), [theme]);
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const {
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layers,
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popupInfo,
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hoverPosition,
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countRange,
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postcodeCountRange,
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colorFeatureMeta,
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handleMouseLeave,
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primaryTravelIndex,
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} = useDeckLayers({
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data,
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postcodeData,
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usePostcodeView,
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pois,
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viewFeature,
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colorRange,
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filterRange,
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features,
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selectedHexagonId,
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hoveredHexagonId,
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onHexagonClick,
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onHexagonHover,
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theme,
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selectedPostcodeGeometry,
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bounds: viewportBounds,
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travelTimeEntries,
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travelTimeColorRanges,
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});
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return (
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<div className="flex-1 h-full relative" ref={containerRef} onMouseLeave={handleMouseLeave}>
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<MapGL
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{...viewState}
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onMove={handleMove}
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onLoad={handleMapLoad as never}
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mapStyle={mapStyle}
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style={{ width: '100%', height: '100%' }}
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attributionControl={false}
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dragRotate={false}
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touchZoomRotate={true}
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touchPitch={false}
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keyboard={true}
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pitchWithRotate={false}
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minZoom={MAP_MIN_ZOOM}
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maxBounds={MAP_BOUNDS}
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>
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<DeckOverlay layers={layers} getTooltip={null} />
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</MapGL>
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{screenshotMode ? (
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ogMode ? (
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<div className="absolute inset-0 flex items-center justify-center z-20 pointer-events-none">
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<h1
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className="text-5xl font-bold text-white drop-shadow-lg"
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style={{ textShadow: '0 2px 8px rgba(0,0,0,0.6)' }}
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>
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Your perfect postcode
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</h1>
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</div>
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) : null
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) : (
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<>
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<LocationSearch onFlyTo={handleFlyTo} onLocationSearched={onLocationSearched} />
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{!hideLegend &&
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(primaryTravelIndex >= 0 && travelTimeColorRanges.get(primaryTravelIndex) ? (
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<MapLegend
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featureLabel={`Travel time (${MODE_LABELS[travelTimeEntries[primaryTravelIndex].mode]})`}
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range={travelTimeColorRanges.get(primaryTravelIndex)!}
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showCancel={false}
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onCancel={onCancelPin}
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mode="feature"
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theme={theme}
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suffix=" min"
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/>
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) : viewFeature && colorRange && colorFeatureMeta ? (
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<MapLegend
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featureLabel={
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viewSource === 'eye'
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? `Previewing \u201c${colorFeatureMeta.name}\u201d`
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: colorFeatureMeta.name
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}
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range={colorRange}
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showCancel={viewSource === 'eye'}
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onCancel={onCancelPin}
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mode="feature"
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enumValues={colorFeatureMeta.type === 'enum' ? colorFeatureMeta.values : undefined}
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theme={theme}
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/>
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) : (
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<MapLegend
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featureLabel="Property density"
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range={
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usePostcodeView
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? [postcodeCountRange.min, postcodeCountRange.max]
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: [countRange.min, countRange.max]
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}
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showCancel={false}
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onCancel={onCancelPin}
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mode="density"
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theme={theme}
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/>
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))}
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{popupInfo && (
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<div
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className="absolute bg-white dark:bg-warm-800 rounded shadow-lg p-2 text-sm dark:text-white"
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style={{
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left: popupInfo.x,
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top: popupInfo.y - 40,
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transform: 'translateX(-50%)',
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zIndex: 9999,
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}}
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>
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<strong className="dark:text-white">{popupInfo.name}</strong>
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<div className="text-warm-500 dark:text-warm-300 text-xs">{popupInfo.category}</div>
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{osmIdToUrl(popupInfo.id) && (
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<a
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href={osmIdToUrl(popupInfo.id)!}
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target="_blank"
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rel="noopener noreferrer"
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className="text-teal-600 dark:text-teal-400 hover:text-teal-800 dark:hover:text-teal-300 text-xs"
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>
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View on OSM
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</a>
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)}
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</div>
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)}
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{hoverPosition && hoveredHexagonId && hoveredHexagonId !== selectedHexagonId && (
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<HoverCard
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x={hoverPosition.x}
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y={hoverPosition.y}
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id={hoveredHexagonId}
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isPostcode={usePostcodeView}
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data={
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usePostcodeView
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? postcodeData.find((f) => f.properties.postcode === hoveredHexagonId)
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?.properties || null
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: data.find((d) => d.h3 === hoveredHexagonId) || null
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}
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filters={filters}
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/>
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)}
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</>
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)}
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</div>
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);
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});
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