grayrest/index.jsx

## index.jsx
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import {observable, computed} from 'mobx';
import {observer} from 'mobx-react';
// import DevTools from 'mobx-react-devtools';

class Server {
  @observable days = [];
  @observable name = "";
  @computed get upDays() {
    return this.days.reduce((acc, day) => acc + (day.up ? 1 : 0), 0);
  }
  @computed get maxStreak() {
    let out = this.days.reduce((acc, day) => {
      if (day.up) {
        acc.streak += 1;
        if (acc.streak > acc.maxStreak) { acc.maxStreak = acc.streak; }
      } else {
        acc.streak = 0;
      }
      return acc;
    }, {streak: 0, maxStreak: 0});
    return out.maxStreak;
  }

  constructor(name) {
    this.name = name;
    for(let i = 0; i < 365; i++) {
      let up = Math.random() > 0.2;
      this.days.push({number: i, up: up});
    }
  }

  update() {
    for(let i = 0; i < 365; i++) {
      let up = Math.random() > 0.2;
      if (this.days[i].up != up) {
        this.days[i].up = up;
      }
    }
  }
}

class State {
  @observable fps = 0;
  servers = [];
}

@observer
class UptimeDay extends Component {
  render() {
    let day = this.props.day;
    return <div className="uptime-day" >
      <span className="uptime-day-status" style={{backgroundColor: day.up ? '#8cc665' : '#ccc'}} />
      <span className="hover">{day.number}: {day.up ? 'Servers operational!' : 'Red alert!'}</span>
    </div>
  }
}

@observer
class ServerUptime extends Component {
  render() {
    let server = this.props.server;
    return <div className="server-uptime">
      <h1>{server.name}</h1>
      <h2>{server.upDays}</h2>
      <h2>Biggest Streak: {server.maxStreak}</h2>
      <div className="days">{server.days.map(day => <UptimeDay day={day} key={day.number} />)}</div>
    </div>
  }
}

@observer
class Shell extends Component {
  render() {
    return <div id="uptime-boxes">
      <div id="fps">{this.props.fps} FPS</div>
      {this.props.servers.map((server, i) => <ServerUptime server={server} key={i} />)}
    </div>
  }
}

let state = new State();
state.servers = ["Stefan"].map(name => new Server(`${name}'s Server`));

// begin hacky benchmarking stuff
function exponentialMovingAverage(alpha) {
  return (val, next) => val ? val + alpha * (next - val) : next;
}

let clear = null;
let lastFrame = 0;
let started = false;
let fps = 0;
let ema = exponentialMovingAverage(2/121);

function rafCallback() {
  let thisFrame = performance.now();
  if (lastFrame) {
    fps = ema(fps, (1000 / (thisFrame - lastFrame)))
  }
  state.fps = fps;
  state.servers.forEach(server => server.update());
  lastFrame = thisFrame;
  clear = requestAnimationFrame(rafCallback);
}

window.togglePlay =  function () {
  if (started) {
    window['playpause'].innerHTML = "Play";
    cancelAnimationFrame(clear);
    clear = null;
    fps = 0;
    lastFrame = 0;
    started = false;
  } else {
    window['playpause'].innerHTML = "Pause";
    started = true;
    lastFrame = 0;
    fps = 0;
    clear = requestAnimationFrame(rafCallback);
  }
}

ReactDOM.render(<Shell fps={state.fps} servers={state.servers} />, document.getElementById('output'));

## mobx_uptime_boxes.html
<!doctype html>
<html>
  <head>
    <title>Uptime Boxes</title>
    <style type="text/css">
      html, body {
        margin: 0;
        padding: 0;
        font-family: sans-serif;
      }

      #fps {
        position: fixed;
        top: 0px;
        right: 0px;
        padding: 32px;
        font-size: 32px;
        text-align: right;
      }

      * {
        box-sizing: border-box;
      }

      .server-uptime {
        display: block;
        overflow: hidden;
        margin: 0 auto;
        width: 50%;
      }

      .server-uptime + .server-uptime {
        margin: 20px auto 0 auto;
        border-top: 1px solid #999;
      }

      .days {
        display: flex;
        flex-direction: row;
        flex-flow: wrap;
      }

      .uptime-day {
        display: flex;
      }

      span.uptime-day-status {
        width: 10px;
        height: 10px;
        margin: 1px;
      }

      .hover {
        display: none;
      }

      .uptime-day-status:hover + .hover {
        display: flex;
        position: absolute;
        margin-top: -35px;
        margin-left: -30px;
        border-radius: 4px;
        color: #eee;
        background-color: #333;
        padding: 10px;
        font-size: 11px;
      }
    </style>
  </head>
  <body>
    <button id="playpause" onclick='togglePlay()'>Play</button>
    <div id="output"></div>

    <script src="/static/bundle.js"></script>
  </body>
</html>
	import React, {Component} from 'react';
	import ReactDOM from 'react-dom';
	import {observable, computed} from 'mobx';
	import {observer} from 'mobx-react';
	// import DevTools from 'mobx-react-devtools';

	class Server {
	@observable days = [];
	@observable name = "";
	@computed get upDays() {
	return this.days.reduce((acc, day) => acc + (day.up ? 1 : 0), 0);
	}
	@computed get maxStreak() {
	let out = this.days.reduce((acc, day) => {
	if (day.up) {
	acc.streak += 1;
	if (acc.streak > acc.maxStreak) { acc.maxStreak = acc.streak; }
	} else {
	acc.streak = 0;
	}
	return acc;
	}, {streak: 0, maxStreak: 0});
	return out.maxStreak;
	}

	constructor(name) {
	this.name = name;
	for(let i = 0; i < 365; i++) {
	let up = Math.random() > 0.2;
	this.days.push({number: i, up: up});
	}
	}

	update() {
	for(let i = 0; i < 365; i++) {
	let up = Math.random() > 0.2;
	if (this.days[i].up != up) {
	this.days[i].up = up;
	}
	}
	}
	}

	class State {
	@observable fps = 0;
	servers = [];
	}

	@observer
	class UptimeDay extends Component {
	render() {
	let day = this.props.day;
	return <div className="uptime-day" >
	<span className="uptime-day-status" style={{backgroundColor: day.up ? '#8cc665' : '#ccc'}} />
	<span className="hover">{day.number}: {day.up ? 'Servers operational!' : 'Red alert!'}</span>
	</div>
	}
	}

	@observer
	class ServerUptime extends Component {
	render() {
	let server = this.props.server;
	return <div className="server-uptime">
	<h1>{server.name}</h1>
	<h2>{server.upDays}</h2>
	<h2>Biggest Streak: {server.maxStreak}</h2>
	<div className="days">{server.days.map(day => <UptimeDay day={day} key={day.number} />)}</div>
	</div>
	}
	}

	@observer
	class Shell extends Component {
	render() {
	return <div id="uptime-boxes">
	<div id="fps">{this.props.fps} FPS</div>
	{this.props.servers.map((server, i) => <ServerUptime server={server} key={i} />)}
	</div>
	}
	}

	let state = new State();
	state.servers = ["Stefan"].map(name => new Server(`${name}'s Server`));

	// begin hacky benchmarking stuff
	function exponentialMovingAverage(alpha) {
	return (val, next) => val ? val + alpha * (next - val) : next;
	}

	let clear = null;
	let lastFrame = 0;
	let started = false;
	let fps = 0;
	let ema = exponentialMovingAverage(2/121);

	function rafCallback() {
	let thisFrame = performance.now();
	if (lastFrame) {
	fps = ema(fps, (1000 / (thisFrame - lastFrame)))
	}
	state.fps = fps;
	state.servers.forEach(server => server.update());
	lastFrame = thisFrame;
	clear = requestAnimationFrame(rafCallback);
	}

	window.togglePlay = function () {
	if (started) {
	window['playpause'].innerHTML = "Play";
	cancelAnimationFrame(clear);
	clear = null;
	fps = 0;
	lastFrame = 0;
	started = false;
	} else {
	window['playpause'].innerHTML = "Pause";
	started = true;
	lastFrame = 0;
	fps = 0;
	clear = requestAnimationFrame(rafCallback);
	}
	}

	ReactDOM.render(<Shell fps={state.fps} servers={state.servers} />, document.getElementById('output'));
	<!doctype html>
	<html>
	<head>
	<title>Uptime Boxes</title>
	<style type="text/css">
	html, body {
	margin: 0;
	padding: 0;
	font-family: sans-serif;
	}

	#fps {
	position: fixed;
	top: 0px;
	right: 0px;
	padding: 32px;
	font-size: 32px;
	text-align: right;
	}

	* {
	box-sizing: border-box;
	}

	.server-uptime {
	display: block;
	overflow: hidden;
	margin: 0 auto;
	width: 50%;
	}

	.server-uptime + .server-uptime {
	margin: 20px auto 0 auto;
	border-top: 1px solid #999;
	}

	.days {
	display: flex;
	flex-direction: row;
	flex-flow: wrap;
	}

	.uptime-day {
	display: flex;
	}

	span.uptime-day-status {
	width: 10px;
	height: 10px;
	margin: 1px;
	}

	.hover {
	display: none;
	}

	.uptime-day-status:hover + .hover {
	display: flex;
	position: absolute;
	margin-top: -35px;
	margin-left: -30px;
	border-radius: 4px;
	color: #eee;
	background-color: #333;
	padding: 10px;
	font-size: 11px;
	}
	</style>
	</head>
	<body>
	<button id="playpause" onclick='togglePlay()'>Play</button>
	<div id="output"></div>

	<script src="/static/bundle.js"></script>
	</body>
	</html>