export function updateMapboxLayers()

in src/layers/mapbox-utils.js [70:94]

• 18 lines of code
• 9 McCabe index (conditional complexity)

export function updateMapboxLayers(map, newLayers = {}, oldLayers = null) {
  // delete no longer existed old layers
  if (oldLayers) {
    checkAndRemoveOldLayers(map, oldLayers, newLayers);
  }

  // insert or update new layer
  Object.values(newLayers).forEach(overlay => {
    const {id: layerId, config, data, sourceId, isVisible} = overlay;
    if (!data && !config) {
      return;
    }

    const {data: oldData, config: oldConfig} = (oldLayers && oldLayers[layerId]) || {};

    if (data && data !== oldData) {
      updateSourceData(map, sourceId, data);
    }

    // compare with previous configs
    if (oldConfig !== config) {
      updateLayerConfig(map, layerId, config, isVisible);
    }
  });
}