SteamGifts: Look for Similar

Adds buttons to search for similar giveaways and removes redirect from existing links.

您需要先安装一个扩展,例如 篡改猴Greasemonkey暴力猴,之后才能安装此脚本。

You will need to install an extension such as Tampermonkey to install this script.

您需要先安装一个扩展,例如 篡改猴暴力猴,之后才能安装此脚本。

您需要先安装一个扩展,例如 篡改猴Userscripts ,之后才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey,才能安装此脚本。

您需要先安装用户脚本管理器扩展后才能安装此脚本。

(我已经安装了用户脚本管理器,让我安装!)

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

(我已经安装了用户样式管理器,让我安装!)

// ==UserScript==
// @name         SteamGifts: Look for Similar
// @namespace    lainscripts_sg_look_for_similar
// @version      4.3
// @description  Adds buttons to search for similar giveaways and removes redirect from existing links.
// @author       lainverse
// @match        *://www.steamgifts.com/
// @match        *://www.steamgifts.com/giveaway/*
// @match        *://www.steamgifts.com/giveaways/*
// @match        *://www.steamgifts.com/discussion/*
// @grant        none
// ==/UserScript==

// jshint esversion: 8
// jshint unused: true
(function () {
    'use strict';

    // NodeList iterator polyfill (mostly for Safari)
    // https://jakearchibald.com/2014/iterators-gonna-iterate/
    if (!NodeList.prototype[Symbol.iterator])
        NodeList.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator];

    (function (st) {
        st.id = 'sg_look_for_similar_stylesheet';
        document.head.appendChild(st);
        st.sheet.insertRule(
            '.featured__heading .fa-search {' + (
                'font-size: 1.8em'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsList {' + (
                'position: relative;' +
                'display: inline-block;' +
                'margin-right: -5px'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsMenu { ' + (
                'display: none;' +
                'position: absolute;' +
                'min-width: max-content;' +
                'background-color: #f9f9f9;' +
                'box-shadow: 0px 4px 8px -2px #666;' +
                'padding: 5px 0px'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsOpts {' + (
                'display: block;' +
                'font-weight: bold;' +
                'min-width: max-content;' +
                'white-space: nowrap;' +
                'color: rgb(70, 86, 112) !important;' +
                'padding: 5px 15px 5px 5px;' +
                'text-decoration: none !important;' +
                'font-size: 12px !important'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsOpts:hover {' + (
                'background-color: #ddd'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsList:hover > .lfsMenu {' + (
                'display: inline-block;' +
                'z-index: 100'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsList > .fa, .lfsList > a {' + (
                'display: block;' +
                'padding: 2px 5px 0 5px;' +
                'margin-left: 0'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsList:hover .fa {' + (
                'color: rgb(70, 86, 112)'
            ) + '}', 0);
        st.sheet.insertRule(
            '.lfsList:hover {' + (
                'background-color: #f9f9f9;' +
                'box-shadow: 0px 4px 8px 0px #666;'
            ) + '}', 0);
    })(document.createElement('style'));

    let loc = (location.pathname
            .replace(/^\/$/, '/giveaways')
            .replace(/^\/giveaway\/.*$/, '/giveaway')
            .replace(/\/search$/i, '')
            .replace(/^\/discussion\/.*/i, '/discussion')),
        type = loc.match(/\/([^/]+)\/?$/i)[1],
        locs = {
            local: {
                title: 'Here',
                id: 'lfsInLocal',
                loc: loc
            },
            entered: {
                title: 'Entered',
                id: 'lfsInEntered',
                loc: '/giveaways/entered'
            },
            giveaways: {
                title: 'All Giveaways',
                id: 'lfsInGiveaways',
                loc: '/giveaways'
            }
        },
        contSearch = {
            giveaway: [locs.giveaways, locs.entered],
            won: [locs.local, locs.entered],
            giveaways: [locs.local, locs.entered],
            entered: [locs.local, locs.giveaways],
            discussion: [locs.giveaways, locs.entered],
            default: [locs.local]
        },
        clHeader = (
            '.giveaway__heading__name,' +
            '.featured__heading__medium,' +
            'a.table__column__heading,' +
            '.markdown td > strong > a[href]'
        ),
        clHeaderIns = [
            'giveaway__heading__name',
            'table__column__heading'
        ],
        caHeaderSib = [
            'giveaway__heading__thin',
            'featured__heading__small'
        ];

    if (!(type in contSearch)) type = 'default';

    const ofClass = (itm, lst) => lst.some(cls => itm.classList.contains(cls));

    const creator = document.createElement('outer');
    creator.make = html => {
        creator.innerHTML = html;
        return creator.removeChild(creator.children[0]);
    };

    function appendLFSLink(he) {
        let heLink = he.pathname ? he : he.querySelector('a'),
            heText = he.textContent;

        // Do not parse invite-only giveaways, non-giveaway and not-steam links
        if (heText == 'Invite Only' ||
            (heLink &&
                !/^\/giveaway\//i.test(heLink.pathname) &&
                !/^store\.steampowered\.com|steamcommunity.com$/i.test(heLink.hostname)))
            return;

        // Do not add LFS button to a node with already existing LFS button
        if (he.parentNode.querySelector('.lfsList'))
            return;

        // Append LFS buttons
        let ovl = creator.make('<div class="lfsList"></div>'), //document.createElement('div'),
            mnu = creator.make('<div class="lfsMenu"></div>');

        ovl.appendChild(
            he.parentNode.querySelector('a[href^="/giveaways/search?"]') ||
            creator.make('<i class="giveaway__icon fa fa-search" />')
        );
        ovl.appendChild(mnu);

        heText = '/search?q=' + encodeURIComponent(
            heText
            .replace(/(\s\(\d+(P|\sCopies)\))+$/i, '')
            .replace(/\.\.\.$/, '')
        );

        for (let el of contSearch[type])
            mnu.appendChild(
                creator.make(`<a class="lfsOpts" id="${el.id}" href="${el.loc + heText}">${el.title}</a>`)
            );

        while (he.nextElementSibling && ofClass(he.nextElementSibling, caHeaderSib))
            he = he.nextElementSibling;
        if (ofClass(he, clHeaderIns))
            he.appendChild(ovl);
        else
            he.parentNode.insertBefore(ovl, he.nextElementSibling);
    }

    for (let header of document.querySelectorAll(clHeader))
        appendLFSLink(header);

    (new MutationObserver(function (ms) {
        for (let m of ms)
            for (let node of m.addedNodes)
                if (node.nodeType === Node.ELEMENT_NODE)
                    for (let header of node.querySelectorAll(clHeader))
                        appendLFSLink(header);
    })).observe(document.body, {
        childList: true,
        subtree: true
    });

    document.addEventListener('click', e => {
        let lnk = e.target.closest('a');
        if (!lnk) return;
        if (lnk.pathname === '/redirect' && lnk.search.startsWith('?url='))
            lnk.href = decodeURIComponent(lnk.search.slice(5));
    });
})();