kepler.gl/src/components/filters/polygon-filter.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

// Copyright (c) 2021 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import React, {useMemo, useCallback} from 'react';
import ItemSelector from 'components/common/item-selector/item-selector';
import {StyledFilterPanel} from './components';
import {LAYER_TYPES} from 'layers/types';

const layerFilter = layer => layer.type === LAYER_TYPES.point;
const isAlreadySelected = (selectedLayers, layerId) =>
  selectedLayers.findIndex(l => l.id === layerId) === -1;

function PolygonFilterFactory() {
  /** @type {typeof import('./polygon-filter').PolygonFilter} */
  const PolygonFilter = React.memo(({filter, layers, setLayers}) => {
    const setNewLayers = useCallback(
      newLayers => {
        return setLayers(newLayers.map(l => l.id));
      },
      [setLayers]
    );

    const selectedLayers = useMemo(() => layers.filter(l => filter.layerId?.includes(l.id)), [
      filter,
      layers
    ]);

    const availableLayers = useMemo(() => {
      // remove already added layers and filter out non point layers
      return layers.filter(
        layer => layerFilter(layer) && isAlreadySelected(selectedLayers, layer.id)
      );
    }, [layers, selectedLayers]);

    return (
      <div>
        <StyledFilterPanel htmlFor={`filter-${filter.id}`}>Layers:</StyledFilterPanel>
        <ItemSelector
          options={availableLayers}
          selectedItems={selectedLayers}
          onChange={setNewLayers}
          searchable={false}
          multiSelect={true}
          getOptionValue={l => l.id}
          displayOption={l => l.config.label}
        />
      </div>
    );
  });

  PolygonFilter.displayName = 'PolygonFilter';

  return PolygonFilter;
}

export default PolygonFilterFactory;