/*
* μlogger
*
* Copyright(C) 2019 Bartek Fabiszewski (www.fabiszewski.net)
*
* This is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
import uAjax from './ajax.js';
import uUtils from './utils.js';
/**
* @class uPosition
* @property {number} id
* @property {number} latitude
* @property {number} longitude
* @property {?number} altitude
* @property {?number} speed
* @property {?number} bearing
* @property {?number} accuracy
* @property {?string} provider
* @property {?string} comment
* @property {?string} image
* @property {string} username
* @property {string} trackname
* @property {number} trackid
* @property {number} timestamp
* @property {number} meters Distance to previous position
* @property {number} seconds Time difference to previous position
* @property {number} totalMeters Distance to first position
* @property {number} totalSeconds Time difference to first position
*/
export default class uPosition {
/**
* @throws On invalid input
* @param {Object} pos
* @returns {uPosition}
*/
static fromJson(pos) {
const position = new uPosition();
position.id = uUtils.getInteger(pos.id);
position.latitude = uUtils.getFloat(pos.latitude);
position.longitude = uUtils.getFloat(pos.longitude);
position.altitude = uUtils.getInteger(pos.altitude, true); // may be null
position.speed = uUtils.getFloat(pos.speed, true); // may be null
position.bearing = uUtils.getInteger(pos.bearing, true); // may be null
position.accuracy = uUtils.getInteger(pos.accuracy, true); // may be null
position.provider = uUtils.getString(pos.provider, true); // may be null
position.comment = uUtils.getString(pos.comment, true); // may be null
position.image = uUtils.getString(pos.image, true); // may be null
position.username = uUtils.getString(pos.username);
position.trackname = uUtils.getString(pos.trackname);
position.trackid = uUtils.getInteger(pos.trackid);
position.timestamp = uUtils.getInteger(pos.timestamp);
position.meters = uUtils.getInteger(pos.meters);
position.seconds = uUtils.getInteger(pos.seconds);
position.totalMeters = 0;
position.totalSeconds = 0;
return position;
}
/**
* @return {boolean}
*/
hasComment() {
return (this.comment != null && this.comment.length > 0);
}
/**
* @return {boolean}
*/
hasImage() {
return (this.image != null && this.image.length > 0);
}
get calculatedSpeed() {
return this.seconds ? this.meters / this.seconds : 0;
}
get totalSpeed() {
return this.totalSeconds ? this.totalMeters / this.totalSeconds : 0;
}
/**
* @return {Promise}
*/
delete() {
return uPosition.update({
action: 'delete',
posid: this.id
});
}
/**
* @return {Promise}
*/
save() {
return uPosition.update({
action: 'update',
posid: this.id,
comment: this.comment
});
}
/**
* Save track data
* @param {Object} data
* @return {Promise}
*/
static update(data) {
return uAjax.post('utils/handleposition.php', data);
}
/**
* Calculate distance to target point using haversine formula
* @param {uPosition} target
* @return {number} Distance in meters
*/
distanceTo(target) {
const lat1 = uUtils.deg2rad(this.latitude);
const lon1 = uUtils.deg2rad(this.longitude);
const lat2 = uUtils.deg2rad(target.latitude);
const lon2 = uUtils.deg2rad(target.longitude);
const latD = lat2 - lat1;
const lonD = lon2 - lon1;
const bearing = 2 * Math.asin(Math.sqrt((Math.sin(latD / 2) ** 2) + Math.cos(lat1) * Math.cos(lat2) * (Math.sin(lonD / 2) ** 2)));
return bearing * 6371000;
}
/**
* Calculate time elapsed since target point
* @param {uPosition} target
* @return {number} Number of seconds
*/
secondsTo(target) {
return this.timestamp - target.timestamp;
}
}