Iwara Enhancement

Iwara增强

多种增强体验的界面优化
当前为 2021-02-04 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Iwara Enhancement
// @name:zh-CN   Iwara增强
// @namespace    https://github.com/guansss/userscripts
// @version      0.3
// @description  Multiple UI enhancements for better experience.
// @description:zh-CN 多种增强体验的界面优化
// @author       guansss
// @match        *://*.iwara.tv/*
// @require      https://cdn.jsdelivr.net/npm/[email protected]/dist/video.min.js#sha256=9HM07Of11yw3TL/m0BxP9pw08qXmG/xOTDc1d3sp2Wo=
// @resource     vjs-css https://cdn.jsdelivr.net/npm/[email protected]/dist/video-js.min.css#sha256=/fXfq3QrnWyMYmF0zX6ImdI1DTraNCAq1vPofa2rs2w=
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_addStyle
// @grant        GM_getResourceText
// @grant        GM_download
// @grant        GM_info
// @grant        unsafeWindow
// @run-at       document-start
// ==/UserScript==

const VIDEOJS_THUMB_PLUGIN = 'https://cdn.jsdelivr.net/npm/[email protected]/dist/index.min.js';

const GLOBAL_STYLES =
    // large screen mode
    `
@media (min-width: 2560px) {
  .container {
    width: 1984px;
  }

  .slick-slider {
    height: 920px !important;
  }

  .slick-list img {
    width: 1800px;
  }

  .comment .user-avatar {
    width: 8.33333333%;
  }
}
` +
    // progress thumbnails
    `
.vjs-mouse-display .vjs-time-tooltip {
    background-size: cover;
    text-shadow: 0 0 2px black, 0 0 2px black !important;
}
`+
    // auto-download actions
    `
.btn-disabled {
    opacity: 0.7;
    pointer-events: none;
}

.icon-btn {
    margin-left: 4px;
    padding: 8px 8px;
    cursor: pointer;
}

#options-switch {
    vertical-align: middle;
}

#filename-input {
    margin-top: 2px;
    width: 400px;
    max-width: 100%;
}

#filename-preview {
    color: #666;
    font-size: 0.8em;
}`;

// the storage keys
const KEY_VOLUME = 'volume';
const KEY_FILENAME = 'filename';

const DEFAULT_FILENAME_TEMPLATE = 'DATE TITLE - AUTHOR (ID)';
let filenameTemplate = GM_getValue(KEY_FILENAME, DEFAULT_FILENAME_TEMPLATE);

(() => {
    'use strict';

    const ready = new Promise(resolve => document.addEventListener('DOMContentLoaded', resolve));

    // jQuery is available only when ready
    ready.then(() => window.$ = unsafeWindow.$ = unsafeWindow.jQuery);

    {
        general();
        enhanceList();

        if (location.pathname.match(/(videos|images)\//)) {
            prettifyContentPage();

            if (location.pathname.includes('videos')) {
                enhanceVideo();
                setupThumbnails();
                setupAutoDownload();
            }
        } else if (location.pathname.includes('search')) {
            enhanceSearch();
        }
    }

    async function general() {
        GM_addStyle(GLOBAL_STYLES);

        await ready;

        // remove R18 warning
        $('#r18-warning').remove();
    }

    async function enhanceList() {
        await ready;

        // display like rate and highlight
        $('.view-content .views-column, .view-content .col-sm-3').each(function () {
            const thiz = $(this);

            if (thiz.children(':first-child').is('.node-teaser')) {
                const likesIcons = thiz.find('.likes-icon');

                // the right icon will be missing if the likes is 0
                if (likesIcons.length === 2) {
                    let likes = likesIcons.eq(0).html().replace(/<i.*<\/i>/m, '').trim();
                    let views = likesIcons.eq(1).html().replace(/<i.*<\/i>/m, '').trim();

                    views = views.includes('k') ? views.slice(0, -1) * 1000 : views;

                    const likeRate = Math.round(1000 * likes / (+views || Infinity)) / 10;

                    likesIcons.eq(1).text(likeRate + '%');

                    if (likeRate >= 4) {
                        thiz.css('background', '#79ecd6');
                        thiz.find('.username').css('color', '#555');
                    }
                }
            }
        });
    }

    async function enhanceVideo() {
        // remove old CSS of videojs
        for (const node of document.head.childNodes) {
            if (node && node.tagName === 'STYLE' && node.innerHTML.includes('video-js')) {
                node.innerHTML = node.innerHTML.replace(/.+?video-js\.min\.css.+/, '');
            }
        }

        // load newer CSS of videojs
        GM_addStyle(GM_getResourceText('vjs-css'));

        // patch the player.on() to return itself to support method chaining, which is no longer supported in the new version
        const Player = videojs.getComponent('Player');
        const readyFn = Player.prototype.ready;

        Player.prototype.ready = function () {
            const onFn = this.on;

            if (onFn && !onFn.patched) {
                this.on = function () {
                    onFn.apply(this, arguments);
                    return this;
                };
                this.on.patched = true;
            }
            return readyFn.apply(this, arguments);
        };

        // inject the videojs to page context
        unsafeWindow._videojs = videojs;

        // replace the old videojs
        let replaceVideoJS = (oldScript) => {
            const script = document.createElement('script');
            script.innerHTML = 'window.videojs = window._videojs';
            oldScript.after(script);
            oldScript.remove();
        };

        for (const element of document.head.children) {
            if (element.src && element.src.includes('video-js/video.js')) {
                replaceVideoJS(element);
                replaceVideoJS = undefined;
                break;
            }
        }

        // if not replaced
        if (replaceVideoJS) {
            new MutationObserver((mutationsList, observer) => {
                mutationsList.forEach(mutation => {
                    if (mutation.type === 'childList') {
                        for (const node of mutation.addedNodes) {
                            if (node && node.src && node.src.includes('video-js/video.js')) {
                                observer.disconnect();
                                replaceVideoJS(node);
                            }
                        }
                    }
                });
            }).observe(document.head, { childList: true });
        }

        // recover the volume in incognito mode
        if (localStorage['-volume'] === undefined) {
            localStorage['-volume'] = GM_getValue(KEY_VOLUME, 0.5);
        }

        await ready;

        const player = await repeatUntil(() => videojs.getPlayers()['video-player']);

        player
            .on('fullscreenchange', () => {
                $('#video-player').focus();
            })
            .on('volumechange', () => {
                // save volume when changed
                GM_setValue(KEY_VOLUME, player.volume() || 0.5);
            });
    }

    async function setupThumbnails() {
        await ready;

        const player = await repeatUntil(() => videojs.getPlayers()['video-player']);

        // e.g. //i.iwara.tv/sites/default/files/videos/thumbnails/1404656/thumbnail-1404656_0001.jpg
        const previewURL = player.poster();

        if (previewURL && previewURL.includes('thumbnail')) {
            // the thumbnail plugin is a commonjs module so we have to define these stuff for it
            unsafeWindow.exports = {};
            unsafeWindow.require = module => module === 'video.js' ? videojs : undefined;

            // load the thumbnail plugin
            await new Promise(resolve => {
                const script = document.createElement('script');
                script.onload = resolve;
                script.src = VIDEOJS_THUMB_PLUGIN;
                document.head.appendChild(script);
            });

            // duration and dimensions are included in the meta data
            player.on('loadedmetadata', () => {
                const division = 16;
                const interval = player.duration() / division;

                const width = 180;
                const height = width * player.videoHeight() / player.videoWidth();

                // strip the image number as well as the extension
                const thumbBaseURL = previewURL.slice(0, -6);

                const sprites = [];

                for (let i = 0; i < division - 1; i++) {
                    // append the base URL with numbers, starting from 01
                    const url = thumbBaseURL + (i + 1 + '').padStart(2, '0') + '.jpg';

                    // using (division-1) thumbnails to cover all the segments
                    //
                    //
                    // thumbs(index):        0       1       2       3           div-3   div-2
                    //                       v       v       v       v             v       v
                    // timeline:     +-------+-------+-------+-------+-- ... ------+-------+-------+
                    //               ^           ^       ^       ^             ^       ^           ^
                    // time spans:   |___________|_______|_______|______ ... __|_______|___________|
                    //                     0         1       2       3           div-3     div-2

                    let start, timeSpan;

                    switch (i) {
                        case 0:
                            start = 0;
                            timeSpan = interval * 1.5;
                            break;

                        case division - 2:
                            start = interval * (0.5 + i);

                            // add extra 0.1 due to the floating point computation...
                            timeSpan = interval * (1.5 + 0.1);
                            break;

                        default:
                            start = interval * (0.5 + i);
                            timeSpan = interval;
                    }

                    sprites.push({
                        url, width, height, start,
                        duration: timeSpan,
                        interval: timeSpan,
                    });
                }

                player.thumbnailSprite({ sprites });
            });
        }
    }

    async function prettifyContentPage() {
        await ready;

        // show full description
        $('.field-name-body a.show').click();

        // enlarge content area
        $('.node-full .col-sm-12:last-child').removeClass('col-sm-12').addClass('col-sm-9').parent().append($('.container .sidebar'));
        $('.container>.col-sm-9, .node-full').removeClass('col-sm-9').addClass('col-sm-12');
        $('.extra-content-block').remove();

        // move "liked by" block to the bottom
        $('#block-views-likes-block').appendTo('.sidebar .region-sidebar');
    }

    async function setupAutoDownload() {
        await ready;

        // wait for Bootstrap's initialization
        await delay(200);

        function getDownloadTarget(template = filenameTemplate) {
            const url = $('#download-options li:first-child a')[0].href;
            const ext = url.match(/Source(\.[^&]+)/)[1];

            const urlMatches = unescape(url).match(/file=.+\/(\d+)_(\w+)_/);
            const uploadDate = urlMatches[1] * 1000;
            const id = urlMatches[2];

            const title = $('.node-info .title').text();
            const author = $('.node-info .username').text();

            const vars = {
                ID: id,
                TITLE: title,
                AUTHOR: author,
                DATE: formatDate(new Date()),
                DATE_TS: new Date(),
                UP_DATE: formatDate(new Date(uploadDate)),
                UP_DATE_TS: uploadDate
            };

            // the keys should be sorted to prevent certain keys from overriding its longer form
            // e.g. "DATE_TS" gets populated with DATE instead of DATE_TS
            const sortedKeys = Object.keys(vars).sort((a, b) => b.length - a.length);

            const filename = sortedKeys.reduce((_filename, key) => _filename.replace(key, vars[key]), template)
                // strip characters disallowed in file path
                .replace(/[*/:<>?\\|]/g, '');

            return {
                url,
                filename: filename + ext,
            };
        }

        const downloadBtn = $('#download-button');
        const downloadBtnHTML = downloadBtn.html();

        // a function to abort the current download
        let abortDownload;

        unsafeWindow.onbeforeunload = () => {
            if (abortDownload) {
                // the message is unlikely to be displayed in modern browsers but, just in case
                return 'Download still in progress, would you like to abort it and exit?';
            }
        };

        unsafeWindow.onunload = () => abortDownload && abortDownload();

        if (GM_info.downloadMode !== 'disabled') {
            downloadBtn.off('click').click(function (e) {
                try {
                    e.preventDefault();

                    this.blur();

                    const likeBtn = $('.flag-like a');

                    // like the video if not liked
                    if (!likeBtn.attr('href').includes('unflag')) {
                        likeBtn.click();
                    }

                    const downloadTarget = getDownloadTarget();

                    downloadBtn.addClass('btn-disabled');

                    let onprogress;

                    // progress is only available in the "native" mode
                    if (GM_info.downloadMode !== 'browser') {
                        onprogress = (e) => {
                            const progress = ~~(e.loaded / e.total * 100);
                            downloadBtn.html(downloadBtnHTML + ' ' + progress + '%');
                        };

                        onprogress({ loaded: 0, total: 1 });
                    }

                    const { abort } = GM_download({
                        url: downloadTarget.url,
                        name: downloadTarget.filename,
                        saveAs: true,
                        onload: downloadEnded,
                        onerror: downloadEnded,
                        ontimeout: downloadEnded,
                        onprogress,
                    });

                    // aborting will be handled by the browser's download manager in non-native mode
                    if (GM_info.downloadMode === 'native') {
                        abortDownload = abort;
                    }
                } catch (e) {
                    showError(e + '');
                }
            });
        } else {
            showError(new Error('Download has been disabled, the default method will be used instead.'));
        }

        function downloadEnded(e) {
            if (e && e.error) {
                console.warn('Download error', e);
                showError(`Download error (${e.error}): ${e.details.current}`);
            }

            downloadBtn.removeClass('btn-disabled').html(downloadBtnHTML);

            abortDownload = undefined;
        }

        function showError(msg) {
            $('#download-options').before(`<div class="text-danger">${msg}</div>`);
        }

        $('<a id="options-switch" class="icon-btn glyphicon glyphicon-cog"></a>')
            .insertAfter('#download-button')
            .click(() => {
                $('#download-options').toggleClass('hidden');
                $('#filename-input').trigger('input');
            });

        $(`
            <h3>Download filename</h3>
            <p>The filename template to use when downloading a video.</p>
            <p>Note the userscript settings will be lost when exiting the incognito mode,
              so in order to apply the settings permanently, you need to modify them in non-incognito mode.</p>
            <p>If you're using Tampermonkey, you can check the <a href="https://greasyfork.org/scripts/416003-iwara-enhancement">description</a>
              for how to improve the download experience.</p>
            <pre>ID          the video's ID
TITLE       title
AUTHOR      author's name
DATE        date time when the download starts
DATE_TS     the DATE in timestamp format
UP_DATE     date time when the video was uploaded
UP_DATE_TS  the UP_DATE in timestamp format</pre>
            <input id="filename-input" value="${filenameTemplate}"></input>
            <a id="filename-submit" class="icon-btn glyphicon glyphicon-ok" title="Apply"></a>
            <a id="filename-reset" class="icon-btn glyphicon glyphicon-repeat" title="Reset to default"></a>
            <p id="filename-preview"></p>`)
            .prependTo('#download-options .panel-body');

        $('#filename-input').on('input', function (e) {
            $('#filename-preview').text(getDownloadTarget(this.value).filename);

            const isChanged = this.value !== filenameTemplate;
            const isDefault = this.value === DEFAULT_FILENAME_TEMPLATE;
            $('#filename-submit')[isChanged ? 'show' : 'hide']();
            $('#filename-reset')[!isDefault ? 'show' : 'hide']();
        });

        $('#filename-submit').hide().click(() => {
            filenameTemplate = $('#filename-input').val();
            GM_setValue(KEY_FILENAME, filenameTemplate);
            $('#filename-input').trigger('input');
        });

        $('#filename-reset').hide().click(() => {
            $('#filename-input').val(DEFAULT_FILENAME_TEMPLATE);
            $('#filename-submit').click();
        });
    }

    async function enhanceSearch() {
        await ready;

        $('.node-image').each(function () {
            const thiz = $(this);
            const twitterShareLink = thiz.find('[title="Share on Twitter"]').attr('href');

            if (twitterShareLink) {
                let iwaraLink = twitterShareLink.slice(twitterShareLink.indexOf('http', 10));

                iwaraLink = decodeURIComponent(iwaraLink);

                thiz.find('h1').wrapInner(`<a href="${iwaraLink}"></a>`);
            }
        });
    }

    function repeat(fn, interval = 200) {
        if (fn()) {
            return 0;
        }

        const id = setInterval(() => {
            try {
                fn() && clearInterval(id);
            } catch (e) {
                clearInterval(id);
            }
        }, interval);

        return id;
    }

    // non-cancelable
    function repeatUntil(fn, interval) {
        return new Promise(resolve => repeat(() => {
            const result = fn();

            if (result) {
                resolve(result);
                return true;
            }
        }, interval));
    }

    function delay(ms) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }

    function formatDate(date) {
        const pad = num => String(num).padStart(2, '0');
        return [
            date.getFullYear(), date.getMonth() + 1, date.getDate(),
            date.getHours(), date.getMinutes(), date.getSeconds(),
        ]
            .map(pad).join('');
    }
})();