yt-horses.js

// ==UserScript==
// @name         Nikki's YouTube chat monitor and responder
// @namespace    https://nikkiandbunty.com/
// @version      0.1
// @description  Monitor YouTube chat and respond to messages
// @author       You
// @match        https://www.youtube.com/*
// @grant        none
// ==/UserScript==

const betPattern = /^[0-9]$/;
const winningPoints = 3;
const secondPoints = 1;
const styles = `
* { background: #000; color: #fff; font-family: sans-serif; font-size: 32px; }
p { padding: 0; margin: 0; margin-bottom: 8px; }
`;
let statsWindow;
let initComplete = false;
let acceptingBets = false;
let bets = {};
let scores = {};
let horseScores = {
    '1': 3,
    '2': 10,
    '3': 2,
    '4': 6,
    '5': 6,
    '6': 12,
    '7': 8,
    '8': 12,
    '9': 12,
};

function nab_displayBets() {
    statsWindow.document.body.innerHTML = '';
    const players = Object.keys( bets ).sort();
    for ( let playerIndex in players ) {
        const player = players[ playerIndex ];
        statsWindow.document.write( '<p>' + player + ' bet on ' + bets[ player ] + '</p>' );
    }
}

function nab_resetScores() {
    scores = {};
    nab_persistScores();
    nab_displayScores();
}

function nab_loadScores() {
    scores = undefined === localStorage.nab_scores ? {} : JSON.parse( localStorage.nab_scores );
}

function nab_persistScores() {
    localStorage.nab_scores = JSON.stringify( scores );
}

function nab_displayScores() {
    statsWindow.document.body.innerHTML = '';
    const players = Object.keys( scores ).sort( ( a, b ) => { return scores[ a ]- scores[ b ]; } ).reverse();
    for ( let playerIndex in players ) {
        const player = players[ playerIndex ];
        statsWindow.document.write( '<p>' + scores[ player ] + ' : ' + player + '</p>' );
    }
}

function nab_processMessage( author, message ) {
    if ( acceptingBets && betPattern.test( message ) ) {
        bets[ author ] = message;
        nab_displayBets();
    }
}

function nab_processMessages() {
    const messages = Array.prototype.slice.call( document.getElementsByClassName('yt-live-chat-text-message-renderer') ).filter( el => el.id === 'message' ).map( el => el.innerText );
    const authors = Array.prototype.slice.call( document.getElementsByClassName('yt-live-chat-author-chip') ).filter( el => el.id === 'author-name' ).map( el => el.innerText );
    for ( var i = 0; i < messages.length; i++ ) {
        nab_processMessage( authors[i], messages[i] );
    }
    setTimeout( nab_processMessages, 5000 );
}

function nab_bettingToggle( event ) {
    if ( ! acceptingBets ) {
        bets = {};
        acceptingBets = true;
    } else {
        acceptingBets = false;
    }
    if ( acceptingBets ) {
        event.target.innerText = 'Stop betting';
    } else {
        event.target.innerText = 'Start betting';
    }
    console.log( event );
}

function nab_awardScores( event ) {
    if ( acceptingBets ) {
        return;
    }
    const winner = prompt( 'Winner : ' );
    const runnerup = prompt( 'Runnerup :' );
    for ( let player in bets ) {
        if ( bets[ player ] === winner ) {
            scores[ player ] = ( scores[ player ] || 0 ) + horseScores[ winner ];
        }
        if ( bets[ player ] === runnerup ) {
            scores[ player ] = ( scores[ player ] || 0 ) + 1;
        }
    }
    nab_persistScores();
    nab_displayScores();
}

function nab_UIInject() {
    console.log('ui');
    const buttons = document.getElementById( 'buttons' );
    if ( ! buttons ) {
        return;
    }
    const bettingToggle = document.createElement( 'button' );
    bettingToggle.innerText = 'Start betting';
    bettingToggle.onclick = nab_bettingToggle;
    const awardScoresButton = document.createElement( 'button' );
    awardScoresButton.innerText = 'Award scores';
    awardScoresButton.onclick = nab_awardScores;
    const resetScoresButton = document.createElement( 'button' );
    resetScoresButton.innerText = 'RESET scores - be careful Nikki!';
    resetScoresButton.onclick = nab_resetScores;
    buttons.parentNode.insertBefore( resetScoresButton, buttons.nextSibling );
    buttons.parentNode.insertBefore( document.createElement( 'p' ), buttons.nextSibling );
    buttons.parentNode.insertBefore( awardScoresButton, buttons.nextSibling );
    buttons.parentNode.insertBefore( bettingToggle, buttons.nextSibling );
    statsWindow = window.open( '', 'nab_stats' );
    statsWindow.document.write( '<html><head><style>' + styles + '</style></head><body></body></html>' );
}

function nab_initGame() {
    nab_loadScores();
    // inject UI elements
    nab_UIInject();
    // start the message checking loop
    setTimeout( nab_processMessages, 1000 );
    setTimeout( nab_displayScores, 1000 );
}

(function() {
    'use strict';
    if ( initComplete ) {
        return;
    }
    initComplete = true;
    nab_initGame();
})();