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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(function linkClickerContentScript() {
// time in ms
let minInterval;
let maxInterval;
let pattern;
let enabled;
let timeoutId;
// Initialize variables.
chrome.runtime.sendMessage({type:'get'}, function(msg) {
if (msg.type == 'update') updateFromMessage(msg);
});
chrome.runtime.onMessage.addListener(
function(msg, sender, sendResponse) {
if (msg.type == 'update') updateFromMessage(msg);
});
function findAllLinks() {
let links = document.links;
let results = new Set();
for (let i = 0; i < links.length; i++) {
let href = links[i].href;
if (!href) continue;
if (href && href.match(pattern)) results.add(href);
}
return Array.from(results);
}
function updateFromMessage(msg) {
console.log(msg);
minInterval = Number(msg.minInterval)
maxInterval = Number(msg.maxInterval);
pattern = new RegExp(msg.pattern);
enabled = Boolean(msg.enabled);
if (enabled) schedule();
}
function followLink() {
if (!enabled) return;
let links = findAllLinks();
if (links.length <= 5) {
// navigate back if the page has not enough links
window.history.back()
console.log("navigate back");
} else {
let link = links[Math.round(Math.random() * (links.length-1))];
console.log(link);
window.location.href = link;
// Schedule in case we just followed an anchor.
schedule();
}
}
function schedule() {
clearTimeout(timeoutId);
let delta = maxInterval - minInterval;
let duration = minInterval + (Math.random() * delta);
console.log(duration);
timeoutId = setTimeout(followLink, duration);
}
})();
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