53 lines
1.9 KiB
JavaScript
53 lines
1.9 KiB
JavaScript
/* eslint-disable prefer-arrow-callback */
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import { Meteor } from 'meteor/meteor';
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import { Mongo } from 'meteor/mongo';
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import { check } from 'meteor/check';
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import Perlin from 'loms.perlin';
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import Subscriptions from '../Subscriptions';
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Perlin.seed(Math.random());
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Meteor.publishTransformed('userSubsToFires', function transform() {
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// https://en.wikipedia.org/wiki/Location_obfuscation
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// https://en.wikipedia.org/wiki/Decimal_degrees#Precision
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// https://gis.stackexchange.com/questions/27792/what-simple-effective-techniques-for-obfuscating-points-are-available
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return Subscriptions.find().serverTransform(function transformDoc(odoc) {
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const doc = odoc;
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// Destructuring gives me an error: "Cannot destructure property `location` of 'undefined'"
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const location = doc.location;
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/* doc.lat = location.lat;
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* doc.lon = location.lon; */
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let lat;
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let lon;
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if (location) {
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lat = Math.round(location.lat * 10) / 10;
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lon = Math.round(location.lon * 10) / 10;
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// console.log(`[${lat}, ${lon}]`);
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const noiseBase = Perlin.perlin2(lat, lon);
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const noise = Math.abs(noiseBase / 3);
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// console.log(`Noise ${noise}, abs: ${Math.abs(noise)}`);
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lat += noise;
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lon += noise;
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doc.location.lat = lat;
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doc.location.lon = lon;
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doc.distance += noiseBase;
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}
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// console.log(`with noise: [${doc.lat}, ${doc.lon}]`);
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delete doc.chatId;
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delete doc.geo;
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return doc;
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});
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});
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Meteor.publish('mysubscriptions', function subscriptions() {
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return Subscriptions.find({ owner: this.userId });
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});
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// Note: subscriptions.view is also used when editing an existing subscription.
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Meteor.publish('subscriptions.view', function subscriptionsView(subscriptionId) {
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check(subscriptionId, String);
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const id = new Mongo.ObjectID(subscriptionId);
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check(id, Meteor.Collection.ObjectID);
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return Subscriptions.find({ _id: id, owner: this.userId });
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});
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