// ==UserScript==
// @name        NGA Likes Support
// @namespace   https://greasyfork.org/users/263018
// @version     1.0.1
// @author      snyssss
// @description 显示被点赞数量

// @match       *bbs.nga.cn/read.php?tid=*
// @match       *ngabbs.com/read.php?tid=*

// @noframes
// @downloadURL none
// ==/UserScript==

(ui => {
    if (!ui) return;

    const hookFunction = (object, functionName, callback) => {
        (originalFunction => {
            object[functionName] = function() {
                const returnValue = originalFunction.apply(this, arguments);

                callback.apply(this, [returnValue, originalFunction, arguments]);

                return returnValue;
            };
        })(object[functionName]);
    };

    const viewLikes = (argid) => {
        const args = ui.postArg.data[argid];

        if (args.comment) return;

        const uid = +args.pAid;

        if (uid) {
            fetch(`/nuke.php?__lib=ucp&__act=get&lite=js&uid=${uid}`)
                .then(res => res.text())
                .then(res => res.match(/{"type":8,"data":(\d+)}/))
                .then(res => res ? res[1] : 0)
                .then(res => {
                const anchor = ui.postArg.data[argid].uInfoC.querySelector('[name=uid]');

                const likes = document.createElement('SPAN');

                likes.className = 'small_colored_text_btn stxt block_txt_c2 vertmod';
                likes.innerHTML = `<span class="white"><span style="font-family: comm_glyphs; -webkit-font-smoothing: antialiased; line-height: 1em;">⯅</span>&nbsp;${res}</span>`;

                anchor.after(likes);
            });
        }
    }

    hookFunction(ui, 'postDisp', (returnValue, originalFunction, arguments) => viewLikes(arguments[0]));

    Object.keys(ui.postArg.data).forEach(i=> viewLikes(i));
})(commonui);