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2023-04-18
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// Given a hash of GeoJSON objects, returns a hash of GeoJSON geometry objects.
// Any null input geometry objects are represented as {type: null} in the output.
// Any feature.{id,properties,bbox} are transferred to the output geometry object.
// Each output geometry object is a shallow copy of the input (e.g., properties, coordinates)!
export default function(inputs) {
var outputs = {}, key;
for (key in inputs) outputs[key] = geomifyObject(inputs[key]);
return outputs;
}
function geomifyObject(input) {
return input == null ? {type: null}
: (input.type === "FeatureCollection" ? geomifyFeatureCollection
: input.type === "Feature" ? geomifyFeature
: geomifyGeometry)(input);
}
function geomifyFeatureCollection(input) {
var output = {type: "GeometryCollection", geometries: input.features.map(geomifyFeature)};
if (input.bbox != null) output.bbox = input.bbox;
return output;
}
function geomifyFeature(input) {
var output = geomifyGeometry(input.geometry), key; // eslint-disable-line no-unused-vars
if (input.id != null) output.id = input.id;
if (input.bbox != null) output.bbox = input.bbox;
for (key in input.properties) { output.properties = input.properties; break; }
return output;
}
function geomifyGeometry(input) {
if (input == null) return {type: null};
var output = input.type === "GeometryCollection" ? {type: "GeometryCollection", geometries: input.geometries.map(geomifyGeometry)}
: input.type === "Point" || input.type === "MultiPoint" ? {type: input.type, coordinates: input.coordinates}
: {type: input.type, arcs: input.coordinates}; // TODO Check for unknown types?
if (input.bbox != null) output.bbox = input.bbox;
return output;
}