react-native-mapsforge-vtm/lib/module/compose/useMapLayersCreated.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';
import { NativeModules, NativeEventEmitter } from 'react-native';

/**
 * Internal dependencies
 */
const {
  MapContainerModule
} = NativeModules;
const useMapLayersCreated = (nativeNodeHandle, onError) => {
  const [mapLayersCreated, setMapLayersCreated] = useState(false);
  useEffect(() => {
    const eventEmitter = new NativeEventEmitter();
    let eventListener = eventEmitter.addListener('MapLayersCreated', result => {
      if (result.nativeNodeHandle === nativeNodeHandle) {
        setMapLayersCreated(true);
      }
    });
    return () => {
      eventListener.remove();
    };
  }, [nativeNodeHandle]);
  useEffect(() => {
    if (nativeNodeHandle) {
      MapContainerModule.getLayersCreated(nativeNodeHandle).then(created => {
        setMapLayersCreated(created);
      }).catch(err => {
        console.log('ERROR', err);
        onError ? onError(err) : null;
      });
    }
  }, [nativeNodeHandle]);
  return mapLayersCreated;
};
export default useMapLayersCreated;
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