Add links to next and previous posts to each post
// ==UserScript==
// @name Links to Next and Previous Posts
// @namespace https://greasyfork.org/en/users/163551-vannius
// @version 2.00
// @license MIT
// @description Add links to next and previous posts to each post
// @author Vannius
// @match https://althistory.com/threads/*
// @match https://forum.questionablequesting.com/threads/*
// @match https://forums.spacebattles.com/threads/*
// @match https://forums.sufficientvelocity.com/threads/*
// @match https://www.alternatehistory.com/forum/threads/*
// @match https://www.the-sietch.com/index.php?threads/*
// @match https://xenforo.com/community/threads/*
// @grant none
// ==/UserScript==
(function () {
// Make <li> tag with new link.
const makeLink = (id, title, symbol) => {
const newLink = document.createElement('a');
newLink.href = '#' + id;
newLink.title = title;
newLink.appendChild(document.createTextNode(symbol));
newLink.addEventListener('click', function(e) {
e.preventDefault();
document.getElementById(id).scrollIntoView();
}, false);
const liTag = document.createElement('li');
liTag.appendChild(newLink);
return liTag;
}
// Get message ids from messageTags and make in hashLinks
const messageTags = [...document.querySelectorAll('.message-attribution-opposite--list > li')]
.filter(x => /^#[\d,]+$/.test(x.textContent.trim()));
const ids = messageTags.map(x => x.closest('article').id);
for (let i = 0; i < messageTags.length; i++) {
// Add a link to next post
if (i !== messageTags.length - 1) {
const nextPost = makeLink(ids[i + 1], "Next post", '▼');
messageTags[i].parentElement.appendChild(nextPost);
}
// Add a link to prev post
if (i !== 0) {
const prevPost = makeLink(ids[i - 1], "Prev post", '▲');
messageTags[i].parentElement.insertBefore(prevPost, messageTags[i]);
}
// Add a link to current post
if (i === 0 || i === messageTags.length - 1) {
const currentPost = makeLink(ids[i], "Current post", '◇');
if (i === 0) {
messageTags[i].parentElement.insertBefore(currentPost, messageTags[i]);
} else if (i === messageTags.length - 1) {
messageTags[i].parentElement.appendChild(currentPost);
}
}
}
})();