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622466f97c
* add geolocation samples Co-authored-by: amysteamdev <37001393+AmySteam@users.noreply.github.com> Co-authored-by: Oliver Dunk <oliverdunk@google.com>
67 lines
2.2 KiB
JavaScript
67 lines
2.2 KiB
JavaScript
// Copyright 2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Registering this listener when the script is first executed ensures that the
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// offscreen document will be able to receive messages when the promise returned
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// by `offscreen.createDocument()` resolves.
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chrome.runtime.onMessage.addListener(handleMessages);
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function handleMessages(message, sender, sendResponse) {
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// Return early if this message isn't meant for the offscreen document.
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if (message.target !== 'offscreen') {
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return false;
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}
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if (message.type !== 'get-geolocation') {
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console.warn(`Unexpected message type received: '${message.type}'.`);
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return;
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}
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getGeolocation().then((geolocation) => sendResponse(geolocation));
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// we need to explictly return true in our chrome.runtime.onMessage handler
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// in order to allow the requestor to handle the request asynchronous.
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return true;
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}
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// getCurrentPosition returns a prototype based object, so the properties
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// end up being stripped off when sent over to our service worker. To get
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// around this, we deeply clone it
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function clone(obj) {
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const copy = {};
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// Return the value of any non true object (typeof(null) is "object") directly.
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// null will throw an error if you try to for/in it. We can just return
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// the value early.
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if (obj === null || !(obj instanceof Object)) {
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return obj;
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} else {
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for (const p in obj) {
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copy[p] = clone(obj[p]);
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}
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}
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return copy;
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}
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async function getGeolocation() {
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return new Promise((resolve, reject) => {
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navigator.geolocation.getCurrentPosition(
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(loc) => resolve(clone(loc)),
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// in case the user doesnt have or is blocking `geolocation`
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(err) => reject(err)
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);
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});
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}
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