jiaojing/cloudfunctions/quickstartFunctions/node_modules/@cloudbase/database/dist/esm/geo/polygon.js

import { SYMBOL_GEO_POLYGON } from '../helper/symbol';
import { isArray, isNumber } from '../utils/type';
import { LineString } from './lineString';
export class Polygon {
    constructor(lines) {
        if (!isArray(lines)) {
            throw new TypeError(`"lines" must be of type LineString[]. Received type ${typeof lines}`);
        }
        if (lines.length === 0) {
            throw new Error('Polygon must contain 1 linestring at least');
        }
        lines.forEach(line => {
            if (!(line instanceof LineString)) {
                throw new TypeError(`"lines" must be of type LineString[]. Received type ${typeof line}[]`);
            }
            if (!LineString.isClosed(line)) {
                throw new Error(`LineString ${line.points.map(p => p.toReadableString())} is not a closed cycle`);
            }
        });
        this.lines = lines;
    }
    parse(key) {
        return {
            [key]: {
                type: 'Polygon',
                coordinates: this.lines.map(line => {
                    return line.points.map(point => [point.longitude, point.latitude]);
                })
            }
        };
    }
    toJSON() {
        return {
            type: 'Polygon',
            coordinates: this.lines.map(line => {
                return line.points.map(point => [point.longitude, point.latitude]);
            })
        };
    }
    static validate(polygon) {
        if (polygon.type !== 'Polygon' || !isArray(polygon.coordinates)) {
            return false;
        }
        for (let line of polygon.coordinates) {
            if (!this.isCloseLineString(line)) {
                return false;
            }
            for (let point of line) {
                if (!isNumber(point[0]) || !isNumber(point[1])) {
                    return false;
                }
            }
        }
        return true;
    }
    static isCloseLineString(lineString) {
        const firstPoint = lineString[0];
        const lastPoint = lineString[lineString.length - 1];
        if (firstPoint[0] !== lastPoint[0] || firstPoint[1] !== lastPoint[1]) {
            return false;
        }
        return true;
    }
    get _internalType() {
        return SYMBOL_GEO_POLYGON;
    }
}