103 lines
3.1 KiB
JavaScript
103 lines
3.1 KiB
JavaScript
/* global Counter */
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/* eslint-disable import/no-absolute-path */
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import { Meteor } from 'meteor/meteor';
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import { check, Match } from 'meteor/check';
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import IPGeocoder from '/imports/startup/server/IPGeocoder';
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import ActiveFires from '../ActiveFires';
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const counter = new Counter('countActiveFires', ActiveFires.find({}));
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Meteor.publish('activefirestotal', () => counter);
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const validZoom = Match.Where((zoom) => {
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// http://wiki.openstreetmap.org/wiki/Zoom_levels
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check(zoom, Number);
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return zoom >= 0 && zoom <= 19;
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});
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// https://github.com/3stack-software/meteor-match-library
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function NumberBetween(min, max) {
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return Match.Where((x) => {
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check(x, Number);
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return min <= x && x <= max;
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});
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}
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function NullOr(type) {
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return Match.Where((x) => {
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if (x === null) {
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return true;
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}
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check(x, type);
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return true;
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});
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}
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// http://wiki.openstreetmap.org/wiki/Zoom_levels
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// http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Resolution_and_Scale
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// http://cwestblog.com/2012/11/12/javascript-degree-and-radian-conversion/
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Math.radians = (degrees) => {
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const rad = (degrees * Math.PI) / 180;
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return rad;
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};
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const activefires = (zoom, lat, lng, height, width) => {
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// latitude -90 and 90 and the longitude between -180 and 180
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check(lat, NumberBetween(-90, 90));
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check(lng, NumberBetween(-180, 180));
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// console.log("Zoom: " + zoom + " lat: " + lat + " lng: " + lng);
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const resolution = (156543.03 * Math.cos(Math.radians(lat))) / (2 ** zoom);
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const distUnt = resolution * Math.max(height, width);
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const distance = Math.trunc(distUnt);
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// console.log(`so ${height}x${width} gives ${Math.trunc(resolution*height/1000)} x ${Math.trunc(resolution*width/1000)} km, so looking in ${distance}`);
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console.log(`so ${height}x${width} gives ${resolution} of resolution, so looking in ${distance}`);
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return ActiveFires.find({
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ourid: {
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$near: {
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$geometry: {
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type: 'Point',
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coordinates: [lng, lat]
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},
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$minDistance: 0,
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$maxDistance: distance
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}
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}
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}, {
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fields: {
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lat: 1,
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lon: 1,
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scan: 1
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}
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});
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};
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Meteor.publish('activefiresmyloc', (zoom, lat, lng, height, width) => {
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check(zoom, validZoom);
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check(lat, NullOr(Number));
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check(lng, NullOr(Number));
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check(height, NullOr(Number));
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check(width, NullOr(Number));
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console.log(`Check active fires in ${lat},${lng} with zoom ${zoom} pixels in ${height}x${width} map`);
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if (lat === null || lng === null) {
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let clientIP;
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if (this.connection && this.connection.clientAddress) {
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clientIP = this.connection.clientAddress;
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} else {
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console.warn('We cannot get this meteor connection IP');
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clientIP = '127.0.0.1';
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}
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if (clientIP === '127.0.0.1') {
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clientIP = '80.58.61.250'; // Some Spain IP address
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}
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// https://www.npmjs.com/package/maxmind
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const location = IPGeocoder.get(clientIP);
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console.log(location);
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return activefires(zoom, location.latitude, location.longitude, height, width);
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}
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return activefires(zoom, lat, lng, height, width);
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});
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