kevinulrich/greatCircle

"use strict";

const Vector = require('./Vector.js');

class Point {
    constructor(opts) {
        this.latitude = opts.latitude || 0;
        this.longitude = opts.longitude || 0;
        this.payload = opts.payload || {};
    }

    getVectorTo(point) {
        var vector = new Vector(this, point);

        return vector;
    }

    getVectorFrom(point) {
        var vector = this.getVectorTo(point);

        vector.invert();

        return vector;
    }

    isValid() {
        if(!Point._isValidDegree(this.latitude) || !Point._isValidDegree(this.longitude)) {
            return false;
        }

        return true;
    }

    /**
     * Check whether a given value can plausibly be a degree
     * @param {number} The number to check
     * @return {boolean}
     * @static
     */
    static _isValidDegree(degree) {
        if(isNaN(degree)) {
            return false;
        }

        if(Math.abs(parseFloat(degree) > 180)) {
            return false;
        }

        return true;
    }
}

Point.latitude = 0;
Point.longitude = 0;
Point.payload = {};

module.exports = Point;