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WebFreak001 / reddit.com/r/place template + auto placer

// ==UserScript==
// @name         reddit.com/r/place template + auto placer
// @namespace    http://tampermonkey.net/
// @version      1.5
// @description  try to take over the world!
// @author       You
// @match        https://www.reddit.com/place*
// @match        https://www.reddit.com/r/place*
// @grant        unsafeWindow
// @updateURL https://openuserjs.org/meta/WebFreak001/reddit.comrplace_template_+_auto_placer.meta.js
// ==/UserScript==

function getPixels(img) {
	var canvas = document.createElement("canvas");
	canvas.width = img.width;
	canvas.height = img.height;
	var ctx = canvas.getContext("2d");
	ctx.drawImage(img, 0, 0);
	return ctx.getImageData(0, 0, img.width, img.height).data;
}
function rgbToPlaceColor(r, g, b, a) {
	if (a < 128)
		return null;
	var colors = [
		[255, 255, 255],
		[228, 228, 228],
		[136, 136, 136],
		[34, 34, 34],
		[255, 167, 209],
		[229, 0, 0],
		[229, 149, 0],
		[160, 106, 66],
		[229, 217, 0],
		[148, 224, 68],
		[2, 190, 1],
		[0, 211, 221],
		[0, 131, 199],
		[0, 0, 234],
		[207, 110, 228],
		[130, 0, 128]
	];
	var distances = [];
	var i;
	for (i = 0; i < colors.length; i++) {
		var c = colors[i];
		var dR = c[0] - r;
		var dG = c[1] - g;
		var dB = c[2] - b;
		distances.push(dR * dR + dG * dG + dB * dB);
	}
	var minIdx = 0;
	var minDist = 255 * 255 * 255;
	for (i = 0; i < distances.length; i++)
		if (distances[i] < minDist) {
			minDist = distances[i];
			minIdx = i;
		}
	return minIdx;
}

(function () {
	'use strict';
	function toHtml(str) {
		var htmlObject = document.createElement('div');
		htmlObject.innerHTML = str;
		return htmlObject.firstChild;
	}
	const params = (location.search || "?").substr(1).split("&").map(x => x.split("=").map(a => unescape(a))).reduce((o, [k, v]) => Object.assign(o, { [k]: v }), {});
	var img = document.createElement("img");
	img.crossOrigin = "Anonymous";
	img.src = params.template;
	img.className = "place-canvas";
	var offsetX = parseInt(params.ox);
	var offsetY = parseInt(params.oy);
	Object.assign(img.style, {
		transform: `translate(${params.ox - 0.5}px,${params.oy - 0.5}px)`,
		position: "absolute",
		top: 0,
		left: 0,
		width: params.tw ? `${params.tw}px` : undefined,
		pointerEvents: "none",
		zIndex: 5,
		opacity: 0.5,
	});
	const v = document.querySelector(".place-camera");
	if (!v) return;
	v.appendChild(img);
	const cb = document.querySelector(".place-camera-button");
	const c2 = toHtml(`<button id="place-template-button" class="place-camera-button" style="display:inline-block; top:110px; background-image:inherit">T</button>`);
	cb.parentNode.insertBefore(c2, cb);
	let active = 1;
	c2.addEventListener("click", () => {
		if (active === 1) {
			active = 2;
			img.style.opacity = 0.9;
		} else if (active === 2) {
			active = 0;
			img.style.visibility = "hidden";
		} else if (active === 0) {
			active = 1;
			img.style.visibility = "inherit";
			img.style.opacity = 0.5;
		}
	});
	img.onload = function () {
		var pixels = getPixels(img);
		function randomInt(min, max) {
			return Math.floor(Math.random() * (max - min) + min);
		}
		var r = unsafeWindow.r;
		console.log(r);
		var draw;
		function check() {
			if (r.place.getCooldownTimeRemaining() === 0) draw();
			else setTimeout(check, 2500);
		}
		draw = function () {
			var data = document.getElementById("place-canvasse").getContext("2d").getImageData(0, 0, 1000, 1000).data;
			var intv = setInterval(function () {
				var y = randomInt(0, img.width);
				var x = randomInt(0, img.height);
				var pixel = y * img.width * 4 + x * 4;
				var place = rgbToPlaceColor(pixels[pixel], pixels[pixel + 1], pixels[pixel + 2], pixels[pixel + 3]);
				if (place !== null) {
					var placeRGB = [
						data[offsetY * 4000 + y * 4000 + offsetX * 4 + x * 4],
						data[offsetY * 4000 + y * 4000 + offsetX * 4 + x * 4 + 1],
						data[offsetY * 4000 + y * 4000 + offsetX * 4 + x * 4 + 2]
					];
					if (rgbToPlaceColor(placeRGB) != place) {
						console.log("have to draw! ", place);
						console.log(offsetX + x, offsetY + y);
						clearInterval(intv);
						setTimeout(check, 2500);
						r.place.setColor(place);
						r.place.drawTile(offsetX + x, offsetY + y);
					}
				}
			}, 100);
		};

		setTimeout(check, 2500);
	};
	console.log("/r/place template added");
})();