mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-07 10:34:53 +00:00
46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
|
/*\
|
||
|
|
title: $:/plugins/tiddlywiki/geospatial/operators/lookup.js
|
||
|
|
type: application/javascript
|
||
|
|
module-type: filteroperator
|
||
|
|
|
||
|
|
Filter operators for geospatial lookup
|
||
|
|
|
||
|
|
\*/
|
||
|
|
(function(){
|
||
|
|
|
||
|
|
/*jslint node: true, browser: true */
|
||
|
|
/*global $tw: false */
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
var turf = require("$:/plugins/tiddlywiki/geospatial/turf.js"),
|
||
|
|
geotools = require("$:/plugins/tiddlywiki/geospatial/geotools.js");
|
||
|
|
|
||
|
|
exports.geolookup = function(source,operator,options) {
|
||
|
|
// Get the GeoJSON object
|
||
|
|
var output = [],
|
||
|
|
jsonObject = $tw.utils.parseJSONSafe(operator.operands[0],null);
|
||
|
|
if(jsonObject) {
|
||
|
|
// Process the input points
|
||
|
|
source(function(tiddler,title) {
|
||
|
|
var point = geotools.parsePoint(title),
|
||
|
|
result = getPolygonsContainingPoint(jsonObject,point);
|
||
|
|
output.push(JSON.stringify(result))
|
||
|
|
});
|
||
|
|
}
|
||
|
|
// Perform the transformation
|
||
|
|
return output;
|
||
|
|
};
|
||
|
|
|
||
|
|
function getPolygonsContainingPoint(featureCollection,point) {
|
||
|
|
// Filter the GeoJSON feature collection to only include polygon features containing the point
|
||
|
|
const properties = [];
|
||
|
|
turf.featureEach(featureCollection,function(feature) {
|
||
|
|
if(feature.geometry.type === "Polygon" && turf.booleanPointInPolygon(point,feature)) {
|
||
|
|
properties.push(feature.properties);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
return properties;
|
||
|
|
}
|
||
|
|
|
||
|
|
})();
|