function HTMLActuator() { this.tileContainer = document.querySelector(".tile-container"); this.scoreContainer = document.querySelector(".score-container"); this.messageContainer = document.querySelector(".game-message"); this.score = 0; } HTMLActuator.prototype.actuate = function (grid, metadata) { var self = this; window.requestAnimationFrame(function () { self.clearContainer(self.tileContainer); grid.cells.forEach(function (column) { column.forEach(function (cell) { if (cell) { self.addTile(cell); } }); }); self.updateScore(metadata.score); if (metadata.over) self.message(false); // You lose if (metadata.won) self.message(true); // You win! }); }; HTMLActuator.prototype.restart = function () { this.clearMessage(); }; HTMLActuator.prototype.clearContainer = function (container) { while (container.firstChild) { container.removeChild(container.firstChild); } }; HTMLActuator.prototype.addTile = function (tile) { var self = this; var element = document.createElement("div"); var position = tile.previousPosition || { x: tile.x, y: tile.y }; positionClass = this.positionClass(position); // We can't use classlist because it somehow glitches when replacing classes var classes = ["tile", "tile-" + tile.value, positionClass]; this.applyClasses(element, classes); element.textContent = tile.value; if (tile.previousPosition) { // Make sure that the tile gets rendered in the previous position first window.requestAnimationFrame(function () { classes[2] = self.positionClass({ x: tile.x, y: tile.y }); self.applyClasses(element, classes); // Update the position }); } else if (tile.mergedFrom) { classes.push("tile-merged"); this.applyClasses(element, classes); // Render the tiles that merged tile.mergedFrom.forEach(function (merged) { self.addTile(merged); }); } else { classes.push("tile-new"); this.applyClasses(element, classes); } // Put the tile on the board this.tileContainer.appendChild(element); }; HTMLActuator.prototype.applyClasses = function (element, classes) { element.setAttribute("class", classes.join(" ")); }; HTMLActuator.prototype.normalizePosition = function (position) { return { x: position.x + 1, y: position.y + 1 }; }; HTMLActuator.prototype.positionClass = function (position) { position = this.normalizePosition(position); return "tile-position-" + position.x + "-" + position.y; }; HTMLActuator.prototype.updateScore = function (score) { this.clearContainer(this.scoreContainer); var difference = score - this.score; this.score = score; this.scoreContainer.textContent = this.score; if (difference > 0) { var addition = document.createElement("div"); addition.classList.add("score-addition"); addition.textContent = "+" + difference; this.scoreContainer.appendChild(addition); } }; HTMLActuator.prototype.message = function (won) { var type = won ? "game-won" : "game-over"; var message = won ? "You win!" : "Game over!" // if (ga) ga("send", "event", "game", "end", type, this.score); this.messageContainer.classList.add(type); this.messageContainer.getElementsByTagName("p")[0].textContent = message; }; HTMLActuator.prototype.clearMessage = function () { this.messageContainer.classList.remove("game-won", "game-over"); };