Tuna browser script

Get song information from web players, based on NowSniper by Kıraç Armağan Önal
目前为 2020-10-17 提交的版本。查看最新版本。
换行
// ==UserScript==
// @name         Tuna browser script
// @namespace    univrsal
// @version      1.0.1
// @description  Get song information from web players, based on NowSniper by Kıraç Armağan Önal
// @author       univrsal
// @match        *://open.spotify.com/*
// @match        *://soundcloud.com/*
// @grant        unsafeWindow
// ==/UserScript==

(function() {
    'use strict';
    // Configuration
    var port = 1608;
    var refresh_rate_ms = 500;
    var cooldown_ms = 10000;

    // Tuna isn't running we sleep, because every failed request will log into the console
    // so we don't want to spam it
    var failure_count = 0;
    var cooldown = 0;

    function post(data){
        var url = 'http://localhost:' + port + '/';
        var xhr = new XMLHttpRequest();
        xhr.open('POST', url);

        xhr.setRequestHeader('Accept', 'application/json');
        xhr.setRequestHeader('Content-Type', 'application/json');
        xhr.setRequestHeader('Access-Control-Allow-Headers', '*');
        xhr.setRequestHeader('Access-Control-Allow-Origin', '*');

        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4) {
                if (xhr.status !== 200) {
                    failure_count++;
                }
            }
        };
        xhr.send(JSON.stringify({data,hostname:window.location.hostname,date:Date.now()}));
    }

    // Safely query something, and perform operations on it
    function query(target, fun, alt = null) {
        var element = document.querySelector(target);
        if (element !== null) {
            return fun(element);
        }
        return alt;
    }

    function timestamp_to_ms(ts) {
        var splits = ts.split(':');
        if (splits.length == 2) {
            return splits[0] * 60 * 1000 + splits[1] * 1000;
        } else if (splits.length == 3) {
            return splits[0] * 60 * 60 * 1000 + splits[1] * 60 * 1000 + splits[0] * 1000;
        }
        return 0;
    }

    function StartFunction() {
        setInterval(()=>{
            if (failure_count > 3) {
                console.log('Failed to connect multiple times, waiting a few seconds');
                cooldown = cooldown_ms;
                failure_count = 0;
            }

            if (cooldown > 0) {
                cooldown -= refresh_rate_ms;
                return;
            }

            let hostname = window.location.hostname;

            // TODO: maybe add more?
            if (hostname == 'soundcloud.com') {
                let status = query('.playControl', e => e.classList.contains('playing') ? "playing" : "stopped", 'unknown');
                let cover_url = query('.playbackSoundBadge span.sc-artwork', e => e.style.backgroundImage.slice(5, -2).replace('t50x50','t500x500'));
                let title = query('.playbackSoundBadge__titleLink', e => e.title);
                let artists = [ query('.playbackSoundBadge__lightLink', e => e.title) ];
                let progress = query('.playbackTimeline__timePassed span:nth-child(2)', e => timestamp_to_ms(e.textContent));
                let duration = query('.playbackTimeline__duration span:nth-child(2)', e => timestamp_to_ms(e.textContent));
                let album_url = query('.playbackSoundBadge__titleLink', e => e.href);

                if (title !== null) {
                    post({ cover_url, title, artists, status, progress, duration, album_url });
                }
            } else if (hostname == 'open.spotify.com') {
                let status = query('.player-controls [data-testid="control-button-pause"]', e => !!e ? 'playing' : 'stopped', 'unknown');
                let cover_url = query('[data-testid="CoverSlotExpanded__container"] .cover-art-image', e => e.style.backgroundImage.slice(5, -2));
                let title = query('[data-testid="nowplaying-track-link"]', e => e.textContent);
                let artists = query('span[draggable] a[href*="artist"]', e => Array.from(e));
                let progress = query('.playback-bar .playback-bar__progress-time', e => timestamp_to_ms(e[0].textContent));
                let duration = query('.playback-bar .playback-bar__progress-time', e => timestamp_to_ms(e[1].textContent));
                let album_url = query('[data-testid="nowplaying-track-link"]', e => e.href);

                if (title !== null) {
                    post({ cover_url, title, artists, status, progress, duration, album_url });
                }
            }

        }, 500);

    }

    StartFunction();
})();
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