jtBaseApp/node_modules/@turf/clone/dist/js/index.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Returns a cloned copy of the passed GeoJSON Object, including possible 'Foreign Members'.
 * ~3-5x faster than the common JSON.parse + JSON.stringify combo method.
 *
 * @name clone
 * @param {GeoJSON} geojson GeoJSON Object
 * @returns {GeoJSON} cloned GeoJSON Object
 * @example
 * var line = turf.lineString([[-74, 40], [-78, 42], [-82, 35]], {color: 'red'});
 *
 * var lineCloned = turf.clone(line);
 */
function clone(geojson) {
    if (!geojson) {
        throw new Error("geojson is required");
    }
    switch (geojson.type) {
        case "Feature":
            return cloneFeature(geojson);
        case "FeatureCollection":
            return cloneFeatureCollection(geojson);
        case "Point":
        case "LineString":
        case "Polygon":
        case "MultiPoint":
        case "MultiLineString":
        case "MultiPolygon":
        case "GeometryCollection":
            return cloneGeometry(geojson);
        default:
            throw new Error("unknown GeoJSON type");
    }
}
/**
 * Clone Feature
 *
 * @private
 * @param {Feature<any>} geojson GeoJSON Feature
 * @returns {Feature<any>} cloned Feature
 */
function cloneFeature(geojson) {
    var cloned = { type: "Feature" };
    // Preserve Foreign Members
    Object.keys(geojson).forEach(function (key) {
        switch (key) {
            case "type":
            case "properties":
            case "geometry":
                return;
            default:
                cloned[key] = geojson[key];
        }
    });
    // Add properties & geometry last
    cloned.properties = cloneProperties(geojson.properties);
    cloned.geometry = cloneGeometry(geojson.geometry);
    return cloned;
}
/**
 * Clone Properties
 *
 * @private
 * @param {Object} properties GeoJSON Properties
 * @returns {Object} cloned Properties
 */
function cloneProperties(properties) {
    var cloned = {};
    if (!properties) {
        return cloned;
    }
    Object.keys(properties).forEach(function (key) {
        var value = properties[key];
        if (typeof value === "object") {
            if (value === null) {
                // handle null
                cloned[key] = null;
            }
            else if (Array.isArray(value)) {
                // handle Array
                cloned[key] = value.map(function (item) {
                    return item;
                });
            }
            else {
                // handle generic Object
                cloned[key] = cloneProperties(value);
            }
        }
        else {
            cloned[key] = value;
        }
    });
    return cloned;
}
/**
 * Clone Feature Collection
 *
 * @private
 * @param {FeatureCollection<any>} geojson GeoJSON Feature Collection
 * @returns {FeatureCollection<any>} cloned Feature Collection
 */
function cloneFeatureCollection(geojson) {
    var cloned = { type: "FeatureCollection" };
    // Preserve Foreign Members
    Object.keys(geojson).forEach(function (key) {
        switch (key) {
            case "type":
            case "features":
                return;
            default:
                cloned[key] = geojson[key];
        }
    });
    // Add features
    cloned.features = geojson.features.map(function (feature) {
        return cloneFeature(feature);
    });
    return cloned;
}
/**
 * Clone Geometry
 *
 * @private
 * @param {Geometry<any>} geometry GeoJSON Geometry
 * @returns {Geometry<any>} cloned Geometry
 */
function cloneGeometry(geometry) {
    var geom = { type: geometry.type };
    if (geometry.bbox) {
        geom.bbox = geometry.bbox;
    }
    if (geometry.type === "GeometryCollection") {
        geom.geometries = geometry.geometries.map(function (g) {
            return cloneGeometry(g);
        });
        return geom;
    }
    geom.coordinates = deepSlice(geometry.coordinates);
    return geom;
}
/**
 * Deep Slice coordinates
 *
 * @private
 * @param {Coordinates} coords Coordinates
 * @returns {Coordinates} all coordinates sliced
 */
function deepSlice(coords) {
    var cloned = coords;
    if (typeof cloned[0] !== "object") {
        return cloned.slice();
    }
    return cloned.map(function (coord) {
        return deepSlice(coord);
    });
}
exports.default = clone;