btc_bot.js

(function () {
  'use strict';

  const DATA_SOURCE = 'https://meedamian.keybase.pub/btc_data.js';

  const COLORS = {
    '#': 3,  // black
    ' ': 0,  // white
    '!': 1,  // light grey
    '%': 2,  // dark grey
    'o': 6,  // orange
    '*': -10 // ignore
  };

  const COLOR_NAMES = {
    0: 'white',
    1: 'light grey',
    2: 'dark grey',
    3: 'black',
    6: 'orange'
  };

  let image;

  window.process = function ({img, x, y, defX, defY}) {
    r.place.panX = defX;
    r.place.panY = defY;

    image = img.reduce((acc, row, i) => {
      acc.push(...row.split('').map((cell, j) => {
        return {
          color: COLORS[cell],
          x: x + j,
          y: y + i
        };
      }));

      return acc;
    }, []).sort(() => .5 - Math.random()); // "cute shuffle" to make traversing less predictable; ref: http://stackoverflow.com/a/18650169/390493
  };

  const BTC_ID = 'btc-data';

  function updateBitcoin() {
    if (document.getElementById(BTC_ID)) {
      document.getElementById(BTC_ID).remove();
    }

    let script = document.createElement('script');
    script.id = BTC_ID;
    script.src = DATA_SOURCE;

    console.log(`Fetching data from ${DATA_SOURCE}…`);
    document.getElementsByTagName('head')[0].appendChild(script);
  }

  // every 10 minutes
  setTimeout(updateBitcoin, 0);
  setInterval(updateBitcoin, 10 * 60 * 1000);

  r.placeModule('placePaintBot', loader => {
    var c = loader('canvasse');

    setInterval(() => {
      if (!image) {
        console.log('data not yet ready…');
        return;
      }

      if (r.place.getCooldownTimeRemaining() > 200) {
        console.log('cooldown');
        return;
      }

      for (let {x, y, color} of image) {
        let currentColor = r.place.state[c.getIndexFromCoords(x, y)];
        if (color !== currentColor) {
          console.log(`Drawing (${x}, ${y}) from ${COLOR_NAMES[currentColor] || color} to ${COLOR_NAMES[color]}`);
          r.place.setColor(color);
          r.place.drawTile(x, y);
          return;
        }
      }

      console.log('Everything\'s dandy; noop');
    }, 1500);
  });
})();