Function fetchFeatures

src/mapml/handlers/QueryHandler.js:131–318

(template, obj)

    let fetches = [];

    var fetchFeatures = function (template, obj) {
      const parser = new DOMParser();
      return fetch(LeafletUtil.template(template.template, obj), {
        redirect: 'follow'
      })
        .then((response) => {
          if (response.status >= 200 && response.status < 300) {
            return response.text().then((text) => {
              return {
                contenttype: response.headers.get('Content-Type'),
                text: text
              };
            });
          } else {
            throw new Error(response.status);
          }
        })
        .then((response) => {
          let features = [];
          let queryMetas = [];
          let geom =
            "<map-geometry cs='gcrs'><map-point><map-coordinates>" +
            e.latlng.lng +
            ' ' +
            e.latlng.lat +
            '</map-coordinates></map-point></map-geometry>';
          if (response.contenttype.startsWith('text/mapml')) {
            // the mapmldoc could have <map-meta> elements that are important, perhaps
            // also, the mapmldoc can have many features
            let mapmldoc = parser.parseFromString(
              response.text,
              'application/xml'
            );
            let geometrylessFeatures = mapmldoc.querySelectorAll(
              'map-feature:not(:has(map-geometry))'
            );
            if (geometrylessFeatures.length) {
              let g = parser.parseFromString(geom, 'application/xml');
              for (let i = 0; i < geometrylessFeatures.length; i++) {
                let f = geometrylessFeatures[i];
                f.appendChild(g.firstElementChild.cloneNode(true));
              }
            }
            features = Array.prototype.slice.call(
              mapmldoc.querySelectorAll('map-feature')
            );
            // <map-meta> elements for this query
            queryMetas = Array.prototype.slice.call(
              mapmldoc.querySelectorAll(
                'map-meta[name=cs], map-meta[name=zoom], map-meta[name=projection]'
              )
            );
            if (queryMetas.length)
              features.forEach((f) => (f.meta = queryMetas));
          } else if (
            response.contenttype.startsWith('application/json') ||
            response.contenttype.startsWith('application/geo+json') ||
            response.contenttype.startsWith('application/geojson')