// ==UserScript==
// @name         LibGen Search Auto Sort by Year
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Automatically sort by year to LibGen search forms
// @author       Bui Quoc Dung
// @match        https://libgen.*/*
// @grant        none
// ==/UserScript==
(function() {
'use strict';
// Function to add hidden input fields to a form if they do not already exist
function modifyForm(form, inputs) {
inputs.forEach(input => {
// Check if the input field already exists in the form
if (!form.querySelector(`input[name="${input.name}"]`)) {
// Create a hidden input element
const hiddenInput = document.createElement('input');
hiddenInput.type = 'hidden';
hiddenInput.name = input.name;
hiddenInput.value = input.value;
// Append the hidden input to the form
form.appendChild(hiddenInput);
}
});
}
function init() {
// Select the first form with ID 'formlibgen' in libgen.li
const form1 = document.getElementById('formlibgen');
// Select the form with the name 'libgen' in libgen.is
const form2 = document.querySelector('form[name="libgen"]');
// Modify form1 by adding hidden input fields for sorting by year in descending order
if (form1) {
modifyForm(form1, [
{ name: 'order', value: 'year' },
{ name: 'ordermode', value: 'desc' }
]);
}
// Modify form2 by adding hidden input fields for sorting by year in descending order
if (form2) {
modifyForm(form2, [
{ name: 'sort', value: 'year' },
{ name: 'sortmode', value: 'DESC' }
]);
// Add event listener to prevent default form submission and redirect with query parameters
form2.addEventListener('submit', function(event) {
event.preventDefault(); // Prevent default form submission behavior
// Create a FormData object from the form
const formData = new FormData(form2);
// Convert form data into URL query parameters
const params = new URLSearchParams(formData).toString();
// Redirect to libgen search page with modified query parameters
window.location.href = `https://libgen.is/search.php?${params}`;
});
}
}
// Ensure the script runs after the DOM is fully loaded
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', init);
} else {
init();
}
})();