Plays Conways' Game of Life with user's Github activity
// ==UserScript==
// @name Github's Game of Life
// @namespace https://github.com/ryanml/Github-Game-of-Life/
// @description Plays Conways' Game of Life with user's Github activity
// @include https://github.com/*
// @version 1.3
// @grant GM_addStyle
// ==/UserScript==
(function() {
// Strict mode
'use strict';
// Constant hex values
const INACTIVE_HEX = '#eeeeee';
const ACTIVE_HEX_ARR = ['#d6e685', '#8cc665', '#44a340', '#1e6823'];
// Interval by default is 200ms
var IT_INTERVAL = 200;
// Gets the <rect> wrapper tag <g> elements
var columns = document.getElementsByTagName('g');
var colDepth = 7;
var play = false;
var colorize = false;
var generationCount = 0;
var liveCellNum = 0;
var play = false;
var loop;
var fillColumnGaps = fillGaps();
var ui = buildUI();
var grid = buildGrid();
var originalState = buildGrid();
var fillGrid = fillGrid();
// Builds grid of appropriate length
function buildGrid() {
var grid = [];
for (var col = 0; col < columns.length - 1; col++) {
grid.push([]);
}
return grid;
}
// Resets grid to original state
function resetGrid() {
for (var x = 0; x < originalState.length; x++) {
for (var y = 0; y < originalState[x].length; y++) {
grid[x][y] = originalState[x][y][1];
document.getElementById(x + ',' + y).setAttribute('fill', originalState[x][y][0]);
}
}
updateLiveCellCount();
document.getElementById('gol-info').innerHTML = '';
document.getElementById('gcc').innerHTML = (generationCount = 0);
}
// Fills grid with initial states
function fillGrid() {
for (var y = 0; y < colDepth; y++) {
for (var k = 1; k < columns.length; k++) {
var x = k - 1;
var cell = columns[k].children[y];
cell.addEventListener('click', clickUpdateCell);
cell.id = x + ',' + y;
// If cell is default color (Not filled) push 0 to the grid, else 1
var fill = cell.getAttribute('fill');
var active = fill == INACTIVE_HEX ? 0 : 1;
originalState[x].push([fill, active]);
grid[x].push(active);
updateLiveCellCount();
}
}
}
// Click event function for play/pause button. Starts and stops execution of the algorithm
function controlSim() {
if (!play) {
this.id = 'pause';
this.innerHTML = 'Pause';
document.getElementById('gol-info').innerHTML = '';
play = true;
loop = setInterval(checkGrid, IT_INTERVAL);
}
else {
this.id = 'play';
this.innerHTML = 'Play';
play = false;
clearInterval(loop);
}
}
// Applies one sweep of the algorithm to the grid
function step() {
if (!play) {
checkGrid();
}
}
// Sets all cells to dead (0)
function clearGrid() {
for (var x = 0; x < grid.length; x++) {
for (var y = 0; y < grid[x].length; y++) {
updateCellAt(x, y, grid[x][y] = 0);
}
}
updateLiveCellCount();
document.getElementById('gcc').innerHTML = (generationCount = 0);
}
// Updates the interval on change of the range input
function updateInterval() {
IT_INTERVAL = this.value == 0 ? ((this.value + 1) * 10) : (this.value * 10);
// If animation is playing, set new interval loop
if (play) {
clearInterval(loop);
loop = setInterval(checkGrid, IT_INTERVAL);
}
document.getElementById('icc').innerHTML = IT_INTERVAL;
}
// Returns the number of live cells in the grid
function updateLiveCellCount() {
liveCellNum = 0;
for (var x = 0; x < grid.length; x++) {
for (var y = 0; y < grid[x].length; y++) {
if (grid[x][y] == 1) {
liveCellNum++;
}
}
}
document.getElementById('lcc').innerHTML = liveCellNum;
}
// Checks if all cells are dead, displays message
function checkForCellDeaths() {
// Check for no cells
if (liveCellNum == 0) {
// If the simulation is being run it needs to stop
if (play) {
document.getElementById('pause').click();
}
document.getElementById('gol-info').innerHTML = ' - Mass Death! All your cells have died.';
}
}
// Loops through grid and applies Conway's algorithm to cells
function checkGrid() {
for (var x = 0; x < grid.length; x++) {
for (var y = 0; y < grid[x].length; y++) {
var isAlive = grid[x][y] == 1 ? true : false;
var nC = getNumNeighbors(x, y);
if (isAlive && nC < 2) {
grid[x][y] = 0;
}
else if (isAlive && nC == 2 || nC == 3) {
grid[x][y] = 1;
}
else if (isAlive && nC > 3) {
grid[x][y] = 0;
}
else if (!isAlive && nC == 3) {
grid[x][y] = 1;
}
updateCellAt(x, y, grid[x][y]);
}
}
updateLiveCellCount();
checkForCellDeaths();
document.getElementById('gcc').innerHTML = ++generationCount;
}
// Checks neighbors
function getNumNeighbors(x, y) {
// All possible coordinates of neighbors
var fullCoords = [[x-1,y-1],[x,y-1],[x+1,y-1],[x+1,y],[x+1,y+1],[x,y+1],[x-1,y+1],[x-1,y]];
var neighborCells = [];
// Checks to make sure the coordinates aren't out of bounds, if not, push to neighborCells
for (var f = 0; f < fullCoords.length; f++) {
if (fullCoords[f][0] >= 0 && fullCoords[f][0] <= (grid.length - 1)
&& fullCoords[f][1] >= 0 && fullCoords[f][1] <= colDepth - 1) {
neighborCells.push(grid[fullCoords[f][0]][fullCoords[f][1]]);
}
}
// Adds neighBorCell values via reduce, each live cell is represented by 1
return neighborCells.reduce((c, p) => c + p);
}
// Updates the <rect> markup at given coordinates
function updateCellAt(x, y, newState) {
var cell = document.getElementById(x + ',' + y);
var stateHex = newState == 0 ? INACTIVE_HEX : genRandomHex();
cell.setAttribute('fill', stateHex);
}
// Given a click event on the cell, sets grid at cell to opposite stateHex
function clickUpdateCell() {
var slc = this.id.split(',');
var x = slc[0], y = slc[1];
grid[x][y] = grid[x][y] == 0 ? 1 : 0;
updateCellAt(x, y, grid[x][y]);
updateLiveCellCount();
}
// Generates/gets the appropriate random hex value
function genRandomHex() {
var chars = 'ABCDEF0123456789';
var hex = '#';
if (!colorize) {
return ACTIVE_HEX_ARR[Math.floor(Math.random() * ACTIVE_HEX_ARR.length)];
}
else {
for (var n = 0; n < 6; n++) {
hex += chars[Math.floor(Math.random() * chars.length)];
}
return hex;
}
}
// Fills gaps in the markup
function fillGaps() {
// Gets the needed number of cells and most recent y value for first row
var fCol = columns[1];
var fNodes = fCol.children;
var fCellNo = (colDepth - fNodes.length);
var fCellY = fNodes[0].getAttribute('y');
var nextfCellY = parseInt(fCellY) - 13;
// Gets the needed number of cells and most recent y value for last row
var lCol = columns[columns.length - 1];
var lNodes = lCol.children;
var lCellNo = (colDepth - lNodes.length);
var lCellY = lNodes[lNodes.length - 1].getAttribute('y');
var nextlCellY = parseInt(lCellY) + 13;
for (var f = 0; f < fCellNo; f++) {
fCol.innerHTML = ('<rect class="day" width="11" height="11" y="' + nextfCellY + '" fill="' + INACTIVE_HEX + '"></rect>' + fCol.innerHTML);
nextfCellY -= 13;
}
for (var l = 0; l < lCellNo; l++) {
lCol.innerHTML += '<rect class="day" width="11" height="11" y="' + nextlCellY + '" fill="' + INACTIVE_HEX + '"></rect>';
nextlCellY += 13;
}
}
// Sets colorize variable on change
function setColorize() {
colorize = this.checked ? true : false;
}
// Builds UI and adds it to the document.
function buildUI() {
// Appends needed <style> to <head>
GM_addStyle(" .calendar-graph.days-selected rect.day { opacity: 1 !important; } " +
" .gol-span { display: inline-block; width: 125px; margin: 0px 7px; } " +
" .gol-button { margin: 0px 3px; width: 50px; height: 35px; border-radius: 5px; color: #ffffff; font-weight:bold; font-size: 11px; } " +
" .gol-button:focus { outline: none; } " +
" #play { background: #66ff33; border: 2px solid #208000; } " +
" #pause { background: #ff4d4d; border: 2px solid #cc0000; } " +
" #step { background: #0066ff; border: 2px solid #003380; } " +
" #clear { background: #e6e600; border: 2px solid #b3b300; } " +
" #reset { background: #ff9900; border: 2px solid #cc7a00; } " +
" #gol-range-span { width: 190px; } " +
" #gol-range-lbl { margin-right: 5px; } " +
" #gol-range { vertical-align:middle; width: 100px; } ");
// Contributions tab will be the parent div
var overTab = document.getElementsByClassName('overview-tab')[0];
var contAct = document.getElementsByClassName('js-contribution-activity')[0];
contAct.style.display = 'none';
// Control panel container
var golCont = document.createElement('div');
golCont.className = 'boxed-group flush';
var markUp = "<h3>Github's Game of Life Control Panel <span id='gol-info' style='color:#ff0000'></span></h3>" +
"<div class='boxed-group-inner' style='padding:10px'>" +
"<button class='gol-button' id='play'>Play</button>" +
"<button class='gol-button' id='step'>Step</button>" +
"<button class='gol-button' id='clear'>Clear</button>" +
"<button class='gol-button' id='reset'>Reset</button>" +
"<span class='gol-span'><strong>Live Cell Count: </strong><span id='lcc'></span></span>" +
"<span class='gol-span' style='width:105px'><strong>Generation: </strong><span id='gcc'>0</span></span>" +
"<span class='gol-span' id='gol-range-span'>" +
"<span id='gol-range-lbl'><strong>Int (ms): </strong><span id='icc'>200</span></span>" +
"<input type='range' id='gol-range' value='20'/>" +
"</span>" +
"<input type='checkbox' id='color-check' style='vertical-align:middle'/>" +
"</div>";
golCont.innerHTML = markUp;
overTab.insertBefore(golCont, contAct);
// Add events
document.getElementById('play').addEventListener('click', controlSim);
document.getElementById('step').addEventListener('click', step);
document.getElementById('clear').addEventListener('click', clearGrid);
document.getElementById('gol-range').addEventListener('change', updateInterval);
document.getElementById('color-check').addEventListener('change', setColorize);
document.getElementById('reset').addEventListener('click', resetGrid);
}
})();
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