// ==UserScript==
// @name         Psypost Control Buttons
// @namespace    binjie09-psypost-control-buttons
// @version      1
// @description  Add buttons to control the page id in Psypost article list page URL by 1, using class 'jeg_block_loadmore' div as anchor element.
// @author       Binjie
// @match        https://www.psypost.org/*
// @grant        none
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// 获取目标元素
var targetDiv = document.querySelector(".jeg_block_loadmore");
if (targetDiv) {
// 动态创建按钮
var prevBtn = document.createElement("button");
var nextBtn = document.createElement("button");
prevBtn.innerHTML = "Prev";
nextBtn.innerHTML = "Next";
// 监听按钮点击事件
prevBtn.addEventListener("click", function() {
updatePageId(-1);
});
nextBtn.addEventListener("click", function() {
updatePageId(1);
});
// 将按钮添加到目标元素中
targetDiv.appendChild(prevBtn);
targetDiv.appendChild(nextBtn);
/**
* 更新 URL 中的 page id
* @param {Number} increment 增加的数量（负数表示减少）
*/
function updatePageId(increment) {
var currentPageId = getCurrentPageId();
if (currentPageId !== null) {
var newPageId = currentPageId + increment;
if (newPageId >= 1) {
var currentUrl = window.location.href;
var regex = /page\/\d+/;
var newUrl = currentUrl.replace(regex, "page/" + newPageId);
window.location.href = newUrl;
}
}
}
/**
* 从当前 URL 中提取出 page id
*/
function getCurrentPageId() {
var currentUrl = window.location.href;
var regex = /page\/(\d+)/;
var match = currentUrl.match(regex);
if (match !== null) {
return parseInt(match[1]);
} else {
return null;
}
}
}
})();