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Add extension handling #36

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Add extension handling #36

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18f3a46
Added parsing of GPX extensions
gazhay Oct 25, 2021
ca51f86
Better extension handling
gazhay Oct 25, 2021
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59 changes: 35 additions & 24 deletions src/GPXParser.js
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
/**
* GPX file parser
*
*
* @constructor
*/
let gpxParser = function () {
Expand All @@ -13,12 +13,13 @@ let gpxParser = function () {

/**
* Parse a gpx formatted string to a GPXParser Object
*
*
* @param {string} gpxstring - A GPX formatted String
*
* @param {array} parseExts - an array of strings of extensions to parse
*
* @return {gpxParser} A GPXParser object
*/
gpxParser.prototype.parse = function (gpxstring) {
gpxParser.prototype.parse = function (gpxstring, parseExts=[]) {
let keepThis = this;

let domParser = new window.DOMParser();
Expand Down Expand Up @@ -71,7 +72,7 @@ gpxParser.prototype.parse = function (gpxstring) {
pt.lat = parseFloat(wpt.getAttribute("lat"));
pt.lon = parseFloat(wpt.getAttribute("lon"));

let floatValue = parseFloat(keepThis.getElementValue(wpt, "ele"));
let floatValue = parseFloat(keepThis.getElementValue(wpt, "ele"));
pt.ele = isNaN(floatValue) ? null : floatValue;

pt.cmt = keepThis.getElementValue(wpt, "cmt");
Expand Down Expand Up @@ -114,7 +115,7 @@ gpxParser.prototype.parse = function (gpxstring) {
pt.lat = parseFloat(rtept.getAttribute("lat"));
pt.lon = parseFloat(rtept.getAttribute("lon"));

let floatValue = parseFloat(keepThis.getElementValue(rtept, "ele"));
let floatValue = parseFloat(keepThis.getElementValue(rtept, "ele"));
pt.ele = isNaN(floatValue) ? null : floatValue;

let time = keepThis.getElementValue(rtept, "time");
Expand Down Expand Up @@ -162,12 +163,22 @@ gpxParser.prototype.parse = function (gpxstring) {
pt.lat = parseFloat(trkpt.getAttribute("lat"));
pt.lon = parseFloat(trkpt.getAttribute("lon"));

let floatValue = parseFloat(keepThis.getElementValue(trkpt, "ele"));
let floatValue = parseFloat(keepThis.getElementValue(trkpt, "ele"));
pt.ele = isNaN(floatValue) ? null : floatValue;

let time = keepThis.getElementValue(trkpt, "time");
pt.time = time == null ? null : new Date(time);

// Probably want to pass in an array of extensions user wants here.
// This is all I want though
let extensions = trkpt.querySelector("extensions");
if (extensions!="null"){
for (let extension of parseExts){
let value = parseFloat(keepThis.getElementValue(extensions, extension));
pt[extension] = isNaN(value) ? null : value;
}
}

trackpoints.push(pt);
}
track.distance = keepThis.calculDistance(trackpoints);
Expand All @@ -181,10 +192,10 @@ gpxParser.prototype.parse = function (gpxstring) {

/**
* Get value from a XML DOM element
*
*
* @param {Element} parent - Parent DOM Element
* @param {string} needle - Name of the searched element
*
*
* @return {} The element value
*/
gpxParser.prototype.getElementValue = function(parent, needle){
Expand All @@ -198,10 +209,10 @@ gpxParser.prototype.getElementValue = function(parent, needle){

/**
* Search the value of a direct child XML DOM element
*
*
* @param {Element} parent - Parent DOM Element
* @param {string} needle - Name of the searched element
*
*
* @return {} The element value
*/
gpxParser.prototype.queryDirectSelector = function(parent, needle) {
Expand All @@ -225,9 +236,9 @@ gpxParser.prototype.queryDirectSelector = function(parent, needle) {

/**
* Calcul the Distance Object from an array of points
*
*
* @param {} points - An array of points with lat and lon properties
*
*
* @return {DistanceObject} An object with total distance and Cumulative distances
*/
gpxParser.prototype.calculDistance = function(points) {
Expand All @@ -248,10 +259,10 @@ gpxParser.prototype.calculDistance = function(points) {

/**
* Calcul Distance between two points with lat and lon
*
*
* @param {} wpt1 - A geographic point with lat and lon properties
* @param {} wpt2 - A geographic point with lat and lon properties
*
*
* @returns {float} The distance between the two points
*/
gpxParser.prototype.calcDistanceBetween = function (wpt1, wpt2) {
Expand All @@ -273,9 +284,9 @@ gpxParser.prototype.calcDistanceBetween = function (wpt1, wpt2) {

/**
* Generate Elevation Object from an array of points
*
*
* @param {} points - An array of points with ele property
*
*
* @returns {ElevationObject} An object with negative and positive height difference and average, max and min altitude data
*/
gpxParser.prototype.calcElevation = function (points) {
Expand Down Expand Up @@ -321,11 +332,11 @@ gpxParser.prototype.calcElevation = function (points) {
};

/**
* Generate slopes Object from an array of Points and an array of Cumulative distance
*
* Generate slopes Object from an array of Points and an array of Cumulative distance
*
* @param {} points - An array of points with ele property
* @param {} cumul - An array of cumulative distance
*
*
* @returns {SlopeObject} An array of slopes
*/
gpxParser.prototype.calculSlope = function(points, cumul) {
Expand All @@ -346,7 +357,7 @@ gpxParser.prototype.calculSlope = function(points, cumul) {

/**
* Export the GPX object to a GeoJSON formatted Object
*
*
* @returns {} a GeoJSON formatted Object
*/
gpxParser.prototype.toGeoJSON = function () {
Expand Down Expand Up @@ -385,7 +396,7 @@ gpxParser.prototype.toGeoJSON = function () {

for(idx in track.points) {
let pt = track.points[idx];

var geoPt = [];
geoPt.push(pt.lon);
geoPt.push(pt.lat);
Expand Down Expand Up @@ -421,7 +432,7 @@ gpxParser.prototype.toGeoJSON = function () {

for(idx in track.points) {
let pt = track.points[idx];

var geoPt = [];
geoPt.push(pt.lon);
geoPt.push(pt.lat);
Expand All @@ -435,7 +446,7 @@ gpxParser.prototype.toGeoJSON = function () {

for(idx in this.waypoints) {
let pt = this.waypoints[idx];

var feature = {
"type": "Feature",
"geometry": {
Expand Down