react-native-mapsforge-vtm/lib/module/components/LayerMBTilesBitmap.js

React Native components to build vector maps using Mapsforges fork of vtm. Offline rendering of OpenStreetMap data. Android only

"use strict";

/**
 * External dependencies
 */
import { useEffect, useState } from 'react';

/**
 * Internal dependencies
 */
import useRefState from "../compose/useRefState.js";
import promiseQueue from "../promiseQueue.js";
import { MapLayerMBTilesBitmapModule } from "../nativeMapModules.js";
const Module = MapLayerMBTilesBitmapModule;
;
const LayerMBTilesBitmap = ({
  nativeNodeHandle,
  reactTreeIndex,
  mapFile,
  enabledZoomMin = 1,
  enabledZoomMax = 20,
  alpha = 256,
  transparentColor,
  onCreate,
  onRemove,
  onChange,
  onError
}) => {
  // @ts-ignore
  const [random, setRandom] = useState(0);
  const [uuid, setUuid] = useRefState(null);
  const [triggerCreateNew, setTriggerCreateNew] = useState(null);
  alpha = Math.round(alpha);
  const createLayer = () => {
    setUuid(false);
    promiseQueue.enqueue(() => {
      return Module.createLayer(nativeNodeHandle, mapFile, Math.round(enabledZoomMin), Math.round(enabledZoomMax), alpha, transparentColor, reactTreeIndex).then(response => {
        setUuid(response.uuid);
        setRandom(Math.random());
        null === triggerCreateNew ? onCreate ? onCreate(response) : null : onChange ? onChange(response) : null;
      }).catch(err => {
        console.log('ERROR', err);
        onError ? onError(err) : null;
      });
    });
  };
  useEffect(() => {
    if (uuid === null && nativeNodeHandle && mapFile) {
      createLayer();
    }
    return () => {
      if (uuid && nativeNodeHandle) {
        promiseQueue.enqueue(() => {
          return Module.removeLayer(nativeNodeHandle, uuid).then(removedUuid => {
            onRemove ? onRemove({
              uuid: removedUuid
            }) : null;
          }).catch(err => {
            console.log('ERROR', err);
            onError ? onError(err) : null;
          });
        });
      }
    };
  }, [nativeNodeHandle, !!uuid, triggerCreateNew]);

  // enabledZoomMin enabledZoomMax changed.
  useEffect(() => {
    if (nativeNodeHandle && uuid) {
      Module.updateEnabledZoomMinMax(nativeNodeHandle, uuid, Math.round(enabledZoomMin), Math.round(enabledZoomMax)).catch(err => {
        console.log('ERROR', err);
        onError ? onError(err) : null;
      });
    }
  }, [enabledZoomMin, enabledZoomMax]);
  useEffect(() => {
    if (nativeNodeHandle) {
      if (uuid) {
        promiseQueue.enqueue(() => {
          return Module.removeLayer(nativeNodeHandle, uuid).then(() => {
            setUuid(null);
            setTriggerCreateNew(Math.random());
          }).catch(err => {
            console.log('ERROR', err);
            onError ? onError(err) : null;
          });
        });
      } else if (uuid === null && mapFile) {
        setTriggerCreateNew(Math.random());
      }
    }
  }, [mapFile, alpha, transparentColor]);
  return null;
};
LayerMBTilesBitmap.isMapLayer = true;
export default LayerMBTilesBitmap;
//# sourceMappingURL=LayerMBTilesBitmap.js.map