adds a button when viewing works, which will pick a random work in your current view and redirect you there
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// ==UserScript==
// @name AO3: Jump to a Random Work
// @namespace https://greasyforks.org/en/users/906106-escctrl
// @version 0.1
// @description adds a button when viewing works, which will pick a random work in your current view and redirect you there
// @author escctrl
// @match *://*.archiveofourown.org/tags/*/works*
// @match *://*.archiveofourown.org/works?*
// @require https://ajax.googleapis.com/ajax/libs/jquery/3.6.1/jquery.min.js
// @grant none
// @license MIT
// ==/UserScript==
(function($) {
'use strict';
// add a button
var nav = document.querySelector('div#main.works-index div.navigation.actions.module ul.user.navigation.actions');
var button = document.createElement('li');
button.innerHTML = '<a href="#">Random Work</a>';
button.addEventListener("click", RandomWork);
nav.appendChild(button);
// when the button was pressed, read the number of works, pick a random one, and redirect there
function RandomWork() {
// .contents().first() grabs only the textNode (1-20 of X Works in) instead of the whole heading text
// that way we don't care what numbers might be part of the tag, it's not going to confuse the code
const worksTitle = $('#main h2.heading').contents().first().text();
const worksMatch = worksTitle.match(/\d+/g);
/* if "1-20 of X Works", [0] match is "1" and [1] is "20" from the "1-20" part, and [2] is the total number
if "X Works" (below 20), [0] is the total number
either way it's the last entry in the array
*/
const worksCount = parseInt(worksMatch[worksMatch.length-1]);
// pick random whole number of work within the filter (between 1 and total number of works)
const chooseRandom = Math.floor((Math.random() * worksCount) + 1);
// there are always 20 works per page. find the n-th page and m-th work on that page
const pageRandom = Math.ceil(chooseRandom/20);
const workRandom = chooseRandom - (20*(pageRandom-1));
// check: are we currently on that page?
var thisPage = location.search.match(/page=(\d)+/);
thisPage = thisPage === null ? 1 : parseInt(thisPage[1]); // match only worked if URL contains pagination already
//console.log({chosen: chooseRandom, onpage: pageRandom, workonpage: workRandom, thispage: thisPage});
// if not - built the URL of that page and read it to find the random work link
if (thisPage !== pageRandom) {
var pageURL = location.search.indexOf('page=') > 0 ? location.href.replace(/page=(\d)+/, 'page='+pageRandom) // replace existing page number
: location.href + (location.href.indexOf('?') ? '&' : '?') + 'page='+pageRandom; // add page number if not yet in URL search parameters
// grab the list of works from the page
console.log('loading page...');
$.get(pageURL, function(response) {
}).done(function(response) {
Redirect2Work($(response).find('ol.work.index.group li.work.blurb'), workRandom);
// if that sent us to jail, set the ao3jail marker
}).fail(function(data, textStatus, xhr) {
console.log("Random Work script has hit Retry later", data.status);
return false;
});
}
// if yes - read the random work link from this page
else {
Redirect2Work($('ol.work.index.group li.work.blurb'), workRandom);
}
}
function Redirect2Work(worksList, pick) {
//console.log(worksList);
pick = $(worksList[pick-1]).find('h4 a').first();
var path = $(pick).attr('href');
var title = $(pick).text();
alert('redirecting to a random work: '+title);
window.location.assign(path);
}
})(jQuery);