const leaflet = require('leaflet');

/**
 * Add a WMS layer to a map. opts must be:
 * {
 *  url: '',
 *  params: {}
 *  }
 * @param map
 * @param opts
 */
export function addWMSLayer(map, opts) {
  if (opts.url === '') {
    return null;
  }

  opts.params = Object.assign({
    format: 'image/png',
    transparent: true,
    maxZoom: 14,
    minZoom: 4,
  }, opts.params);

  const mlayer = leaflet.tileLayer.wms(
    opts.url, opts.params,
  );

  mlayer.addTo(map);

  return mlayer;
}

/**
 * Show a popup
 * @param feature
 * @param layer
 */
export function showFeaturePopup(feature, layer) {
  let popup_html = '';
  if (feature.properties && feature.properties.popup) {
    popup_html += feature.properties.popup;
  }

  layer.bindPopup(popup_html);
}