* Creates a new GeoPoint with any of the following forms:<br>
* <pre>
* new GeoPoint(otherGeoPoint)
* new GeoPoint(30, 30)
* new GeoPoint([30, 30])
* new GeoPoint({latitude: 30, longitude: 30})
* new GeoPoint() // defaults to (0, 0)
* </pre>
* <p>Represents a latitude / longitude point that may be associated
* with a key in a ParseObject or used as a reference point for geo queries.
* This allows proximity-based queries on the key.</p>
*
* <p>Only one key in a class may contain a GeoPoint.</p>
*
* <p>Example:<pre>
* var point = new Parse.GeoPoint(30.0, -20.0);
* var object = new Parse.Object("PlaceObject");
* object.set("location", point);
* object.save();</pre></p>
*
* @alias Parse.GeoPoint
*/
import geoLocationManager from '@ohos.geolocation';
import { BusinessError } from '@kit.BasicServicesKit';
class ParseGeoPoint {
_latitude: number;
_longitude: number;
* @param {(number[] | object | number)} arg1 Either a list of coordinate pairs, an object with `latitude`, `longitude`, or the latitude or the point.
* @param {number} arg2 The longitude of the GeoPoint
*/
constructor(
arg1?: [number, number] | { latitude: number; longitude: number } | number,
arg2?: number
) {
if (Array.isArray(arg1)) {
ParseGeoPoint._validate(arg1[0], arg1[1]);
this._latitude = arg1[0];
this._longitude = arg1[1];
} else if (typeof arg1 === 'object') {
ParseGeoPoint._validate(arg1.latitude, arg1.longitude);
this._latitude = arg1.latitude;
this._longitude = arg1.longitude;
} else if (arg1 !== undefined && arg2 !== undefined) {
ParseGeoPoint._validate(arg1, arg2);
this._latitude = arg1;
this._longitude = arg2;
} else {
this._latitude = 0;
this._longitude = 0;
}
}
* North-south portion of the coordinate, in range [-90, 90].
* Throws an exception if set out of range in a modern browser.
*
* @property {number} latitude
* @returns {number}
*/
get latitude(): number {
return this._latitude;
}
set latitude(val: number) {
ParseGeoPoint._validate(val, this.longitude);
this._latitude = val;
}
* East-west portion of the coordinate, in range [-180, 180].
* Throws if set out of range in a modern browser.
*
* @property {number} longitude
* @returns {number}
*/
get longitude(): number {
return this._longitude;
}
set longitude(val: number) {
ParseGeoPoint._validate(this.latitude, val);
this._longitude = val;
}
* Returns a JSON representation of the GeoPoint, suitable for Parse.
*
* @returns {object}
*/
toJSON(): { __type: string; latitude: number; longitude: number } {
ParseGeoPoint._validate(this._latitude, this._longitude);
return {
__type: 'GeoPoint',
latitude: this._latitude,
longitude: this._longitude,
};
}
equals(other: any): boolean {
return (
other instanceof ParseGeoPoint &&
this.latitude === other.latitude &&
this.longitude === other.longitude
);
}
* Returns the distance from this GeoPoint to another in radians.
*
* @param {Parse.GeoPoint} point the other Parse.GeoPoint.
* @returns {number}
*/
radiansTo(point: ParseGeoPoint): number {
const d2r = Math.PI / 180.0;
const lat1rad = this.latitude * d2r;
const long1rad = this.longitude * d2r;
const lat2rad = point.latitude * d2r;
const long2rad = point.longitude * d2r;
const deltaLat = lat1rad - lat2rad;
const deltaLong = long1rad - long2rad;
const sinDeltaLatDiv2 = Math.sin(deltaLat / 2);
const sinDeltaLongDiv2 = Math.sin(deltaLong / 2);
let a =
sinDeltaLatDiv2 * sinDeltaLatDiv2 +
Math.cos(lat1rad) * Math.cos(lat2rad) * sinDeltaLongDiv2 * sinDeltaLongDiv2;
a = Math.min(1.0, a);
return 2 * Math.asin(Math.sqrt(a));
}
* Returns the distance from this GeoPoint to another in kilometers.
*
* @param {Parse.GeoPoint} point the other Parse.GeoPoint.
* @returns {number}
*/
kilometersTo(point: ParseGeoPoint): number {
return this.radiansTo(point) * 6371.0;
}
* Returns the distance from this GeoPoint to another in miles.
*
* @param {Parse.GeoPoint} point the other Parse.GeoPoint.
* @returns {number}
*/
milesTo(point: ParseGeoPoint): number {
return this.radiansTo(point) * 3958.8;
}
* Throws an exception if the given lat-long is out of bounds.
*/
static _validate(latitude: number, longitude: number) {
if (
isNaN(latitude) ||
isNaN(longitude) ||
typeof latitude !== 'number' ||
typeof longitude !== 'number'
) {
throw new TypeError('GeoPoint latitude and longitude must be valid numbers');
}
if (latitude < -90.0) {
throw new TypeError('GeoPoint latitude out of bounds: ' + latitude + ' < -90.0.');
}
if (latitude > 90.0) {
throw new TypeError('GeoPoint latitude out of bounds: ' + latitude + ' > 90.0.');
}
if (longitude < -180.0) {
throw new TypeError('GeoPoint longitude out of bounds: ' + longitude + ' < -180.0.');
}
if (longitude > 180.0) {
throw new TypeError('GeoPoint longitude out of bounds: ' + longitude + ' > 180.0.');
}
}
* Creates a GeoPoint with the user's current location, if available.
*
* @param {object} options The options.
* @param {boolean} [options.enableHighAccuracy] A boolean value that indicates the application would like to receive the best possible results.
* If true and if the device is able to provide a more accurate position, it will do so.
* Note that this can result in slower response times or increased power consumption (with a GPS chip on a mobile device for example).
* On the other hand, if false, the device can take the liberty to save resources by responding more quickly and/or using less power. Default: false.
* @param {number} [options.timeout] A positive long value representing the maximum length of time (in milliseconds) the device is allowed to take in order to return a position.
* The default value is Infinity, meaning that getCurrentPosition() won't return until the position is available.
* @param {number} [options.maximumAge] A positive long value indicating the maximum age in milliseconds of a possible cached position that is acceptable to return.
* If set to 0, it means that the device cannot use a cached position and must attempt to retrieve the real current position.
* If set to Infinity the device must return a cached position regardless of its age. Default: 0.
* @static
* @returns {Promise<Parse.GeoPoint>} User's current location
*/
static current(options): Promise<ParseGeoPoint> {
return new Promise((resolve, reject) => {
let requestInfo:geoLocationManager.CurrentLocationRequest = {'priority': geoLocationManager.LocationRequestPriority.FIRST_FIX,
'scenario': geoLocationManager.LocationRequestScenario.UNSET,
'timeoutMs':options.timeout,
'maxAccuracy': 0};
let locationChange = (err:BusinessError, location:geoLocationManager.Location):void => {
if (err) {
reject('locationChange: err=' + JSON.stringify(err))
}
if (location) {
resolve(new ParseGeoPoint(location.latitude, location.longitude));
}
};
try {
geoLocationManager.getCurrentLocation(requestInfo, locationChange);
} catch (err) {
console.error("errCode:" + err.code + ", message:" + err.message);
}
});
}
}
export default ParseGeoPoint;
