general cleanup

src/assets/index.html

@@ -96,7 +96,7 @@
 				font-size: medium;
 			}
 			#infobox ul {
-				margin: 0 0.5vw;
+				margin: 0;
 				padding: 0;
 				list-style-type: none;
 			}
@@ -105,17 +105,20 @@
 				align-items: center;
 				justify-content: space-between;
 			}
+			#infobox h2 {
+				border-bottom: 1px solid gray;
+				margin-bottom: 5px;
+			}
 			kbd {
 				background-color: #eee;
 				border-radius: 3px;
 				text-align: center;
-				height: 1.8vw;
-				width: 1.8vw;
-				font-size: 1.5vw;
-				margin-block: 2px;
+				padding: 4px 6px;
+				margin: 1px 2px;
 				color: black;
 				border: 1px solid #b4b4b4;
 			}
+
 			.with-border {
 				margin: 4px;
 				border: 4px solid #525252;
@@ -131,6 +134,12 @@
 				flex-direction: column;
 				flex-wrap: wrap;
 			}
+			#quitButton a {
+				color: black;
+			}
+			h2 {
+				margin-block: 0.5vw;
+			}
 		</style>
 		<script type="module" src="main.js"></script>
 	</head>
@@ -147,10 +156,11 @@
 				<div id="infobox" class="with-border">
 					<h2>Controls</h2>
 					<ul>
-						<li><kbd>↑</kbd> Rotate</li>
-						<li><kbd>↓</kbd> Drop</li>
-						<li><kbd>←</kbd> Left</li>
-						<li><kbd>→</kbd> Right</li>
+						<li><kbd>↑</kbd> <span>Rotate</span></li>
+						<li><kbd>↓</kbd> <span>Drop</span></li>
+						<li><kbd>←</kbd> <span>Left</span></li>
+						<li><kbd>→</kbd> <span>Right</span></li>
+						<!-- <li><kbd>CTRL</kbd> + <kbd>↓</kbd> Hard Drop</li> -->
 					</ul>
 				</div>
 			</div>
@@ -160,6 +170,7 @@
 				<h1>You&rsquo;ve been froobed!</h1>
 				<div id="scoreCounter">With a score of</div>
 				<h2 id="tryAgain">try again?</h2>
+				<h2 id="quitButton"><a href="../">quit</a></h2>
 			</div>
 		</div>
 	</body>

src/gameState.ts

@@ -1,5 +1,4 @@
 import { RotationStyle, TileColor } from "./tetrisPieces";
-import { Option, ifSome, isNone, isSome } from "./lib/option";
 import { Point, addPoint } from "./lib/util";
 import { TextureStore } from "./textureStore";
 import { Sidebar } from "./sidebar";
@@ -33,10 +32,10 @@ function posToGridIndex(x: number, y: number): number {
 export class GameState {
 	// Whenever an operation is performed which requires the board to be redrawn, reDraw is set to true
 	reDraw: boolean;
-	heldPiece: Option<HeldPiece>;
+	heldPiece: null | HeldPiece;
 	fallTimer: number;
 	movementTimer: number;
-	grid: Array<Option<TileColor>>;
+	grid: Array<TileColor | null>;
 	sidebarRef: Sidebar;
 
 	constructor(sidebarRef: Sidebar) {
@@ -57,24 +56,22 @@ export class GameState {
 			PLAYFIELD_HEIGHT
 		);
 		for (const [i, tile] of this.grid.entries()) {
-			if (isNone(tile)) {
+			if (tile === null) {
 				continue;
 			}
-			ifSome(tile, (tile) => {
 			GameState.drawTile(...gridIndexToPos(i), tile, ctx, textures);
-			});
 		}
-		ifSome(this.heldPiece, (held) => {
-			for (const tileOffset of held.tiles) {
-				const pos = addPoint(held.pos, tileOffset);
-				GameState.drawTile(...pos, held.schema.color, ctx, textures);
+		if (this.heldPiece !== null ) {
+			for (const tileOffset of this.heldPiece.tiles) {
+				const pos = addPoint(this.heldPiece.pos, tileOffset);
+				GameState.drawTile(...pos, this.heldPiece.schema.color, ctx, textures);
+			}
 		}
-		});
 		this.reDraw = false;
 	}
 
 	fallTick(): void | boolean {
-		if (isNone(this.heldPiece)) {
+		if (this.heldPiece === null) {
 			this.heldPiece = this.sidebarRef.getNextPiece();
 			if (this.allPointsInEmptyGridSpace(this.heldPieceTilesAdjusted())) {
 				this.reDraw = true;
@@ -86,12 +83,14 @@ export class GameState {
 		}
 
 		if (!this.moveHeld(0, 1)) {
+			console.log("move failed");
 			this.flashHeldToGrid();
 		}
 	}
 
 	inputTick(pressed: Array<KeyEvent>): void {
-		if (isNone(this.heldPiece)) return;
+
+		if (this.heldPiece === null) return;
 		for (const key of pressed) {
 			switch (key) {
 				case KeyEvent.Up:
@@ -115,7 +114,8 @@ export class GameState {
 	}
 
 	rotate(): void {
-		ifSome(this.heldPiece, (held) => {
+		if (this.heldPiece === null) return;
+		const held = this.heldPiece;
 		const style = held.schema.rotation;
 		if (style === RotationStyle.None) {
 			return;
@@ -130,39 +130,41 @@ export class GameState {
 			rotationFunc = (p): Point => [1 - p[1], p[0]];
 		}
 		const rotated = held.tiles.map(rotationFunc);
+		
 		const rotatedAdjusted = rotated.map((p) => addPoint(p, held.pos));
 		if (this.allPointsInEmptyGridSpace(rotatedAdjusted)) {
-				held.tiles = rotated;
+			this.heldPiece.tiles = rotated;
 			this.reDraw = true;
 		}
-		});
 	}
 
 	private moveHeld(dx: number, dy: number): boolean {
-		let success = false;
-		ifSome(this.heldPiece, (held) => {
+
+		if (this.heldPiece === null) return false;
+		const held = this.heldPiece;
 		const newPos: Point = addPoint(held.pos, [dx, dy]);
 		if (
 			this.allPointsInEmptyGridSpace(this.heldPieceTilesAdjusted([dx, dy]))
 		) {
 			held.pos = newPos;
 			this.reDraw = true;
-				success = true;
+			return true;
 		}
-		});
-		return success;
+		return false;
 	}
 
 	private allPointsInEmptyGridSpace(points: Array<Point>): boolean {
-		return (
-			points
-				.map((p): boolean => this.isGridSquareFilled(...p))
-				.find((v) => v) === undefined
-		);
+		for (const p of points ) { 
+			if (this.isGridSquareFilled(...p)) {
+				return false;
+			}
+		}
+		return true;
 	}
 
 	// Should only be called when held piece is non none; uses unsafe type assertion.
 	private heldPieceTilesAdjusted(offset: Point = [0, 0]): Array<Point> {
+		console.assert(this.heldPiece !== null);
 		const held = this.heldPiece as HeldPiece;
 
 		const adjusted: Array<Point> = held.tiles.map((t): Point => {
@@ -172,7 +174,10 @@ export class GameState {
 	}
 
 	private flashHeldToGrid(): void {
-		ifSome(this.heldPiece, (held) => {
+		if (this.heldPiece === null) {
+			return;
+		}
+		const held = this.heldPiece;
 		this.heldPieceTilesAdjusted().forEach((pos) => {
 			const index = posToGridIndex(...pos);
 			this.grid[index] = held.schema.color;
@@ -181,14 +186,13 @@ export class GameState {
 		this.heldPiece = null;
 		this.reDraw = true;
 		this.checkForTetris();
-		});
 	}
 
 	private checkForTetris(): void {
 		// Iterate through rows, starting at bottom and going to top
 		for (let i = 0; i < this.grid.length - GRID_WIDTH; i += GRID_WIDTH) {
 			// While the current row is completely filled, thus tetris
-			while (this.grid.slice(i, i + GRID_WIDTH).every((t) => isSome(t))) {
+			while (this.grid.slice(i, i + GRID_WIDTH).every((t) => t !== null)) {
 				// Remove all of the tiles from the current row.
 				this.grid.splice(i, GRID_WIDTH);
 				// Then fill the empty space with new tiles
@@ -204,11 +208,14 @@ export class GameState {
 		if (x >= GRID_WIDTH || x < 0 || y >= GRID_HEIGHT) return true;
 
 		const index = posToGridIndex(x, y);
-		if (isSome(this.grid[index])) {
-			return true;
-		}
+
+		// There's a bug here where sometimes a tile can be undefined. It's supposed to only ever be a valid tile or null.
+		// Couldn't find it so just check for undefined too.
+		if (this.grid[index] === null || this.grid[index] === undefined) {
 			return false;
 		}
+		return true;
+	}
 
 	private static drawTile(
 		x: number,

src/lib/controller.ts

@@ -1,4 +1,3 @@
-import { ifSome } from "./option";
 
 export const enum KeyEventType {
 	IfCaught,
@@ -57,21 +56,24 @@ export class Keyboard<T> {
 	}
 	pollSpecificKey(key: T, callback: () => void): void {
 		const v = this.keyQueue.get(key);
-		ifSome(v, (vv) => {
-			if (!this.keysPressed.has(vv.outputValue)) {
-				if (vv.eventType === KeyEventType.IfCaught || vv.polled) {
-					vv.polled = false;
-					this.keyQueue.delete(vv.outputValue);
+		if (v === null || v === undefined) {
+			return;
+		}
+		if (!this.keysPressed.has(v.outputValue)) {
+			if (v.eventType === KeyEventType.IfCaught || v.polled) {
+				v.polled = false;
+				this.keyQueue.delete(v.outputValue);
 				return;
 			}
 		}
-			if (!vv.polled && vv.eventType === KeyEventType.OnlyOnce) {
+		if (!v.polled && v.eventType === KeyEventType.OnlyOnce) {
 			callback();
-			} else if (vv.eventType !== KeyEventType.OnlyOnce) {
+		} else if (v.eventType !== KeyEventType.OnlyOnce) {
 			callback();
 		}
-			vv.polled = true;
-		});
+		v.polled = true;
+
+
 	}
 
 	poll(): Array<T> {
@@ -100,16 +102,19 @@ export class Keyboard<T> {
 
 	private keyDown(key: string): void {
 		const mapped = this.keyMap.get(key);
-		ifSome(mapped, (m) => {
-			this.keysPressed.add(m.outputValue);
-			if (!this.keyQueue.has(m.outputValue))
-				this.keyQueue.set(m.outputValue, m);
-		});
+		if (mapped === null || mapped === undefined) {
+			return;
+		}
+		this.keysPressed.add(mapped.outputValue);
+		if (!this.keyQueue.has(mapped.outputValue)) {
+			this.keyQueue.set(mapped.outputValue, mapped);
+		}
 	}
 	private keyUp(key: string): void {
 		const mapped = this.keyMap.get(key);
-		ifSome(mapped, (m) => {
-			this.keysPressed.delete(m.outputValue);
-		});
+		if (mapped === null || mapped === undefined) {
+			return;
+		}
+		this.keysPressed.delete(mapped.outputValue);
 	}
 }

src/lib/option.ts

@@ -1,67 +1,12 @@
-//
-// Options (inspired by rust)
-//
+type Option<T> = null | undefined | T;
 
-// Most methods like `document.getElementById("something")` will naturally return something of the type `Option<T>`
-// This type has been chosen to remain compatible with most vanilla JS methods.
-// A more capable option type could have been made by creating an option object, but would lose compatibility with JS.
-export type Option<T> = null | undefined | T;
-
-export function isNone<T>(input: Option<T>): boolean {
-	if (input === null || input === undefined) {
-		return true;
-	}
-	return false;
-}
-
-export function isSome<T>(input: Option<T>): boolean {
-	if (input === null || input === undefined) {
-		return false;
-	}
-	return true;
-}
-
-type SingleArgCallback<T> = (v: T) => void;
-type EmptyCallback = () => void;
-
-/**
- * If the input `Option<T>` is some, then run the `doAfter` callback.
- * Intended to mimic rust's conditional enum matching pattern: `if let Some(v) = opt {<do things with value v>}`
- */
-export function ifSome<T>(
-	input: Option<T>,
-	doAfter: SingleArgCallback<T>
-): void {
-	if (isSome(input)) {
-		doAfter(input as T);
-	}
-}
-
-export function ifNone<T>(input: Option<T>, doAfter: EmptyCallback): void {
-	if (isNone(input)) {
-		doAfter();
-	}
-}
-
-// Not sure how ergonomic this is in actual use. It may get axed.
-export function ifEither<T>(
-	input: Option<T>,
-	doIfSome: SingleArgCallback<T>,
-	doIfNone: EmptyCallback
-): void {
-	if (isSome(input)) {
-		doIfSome(input as T);
-		return;
-	}
-	doIfNone();
-}
 
 /**
 	Unwrap option of `null|undefined|T` to `T` throw error if value is not `T`.
     `expect()` is preferred to this function as it gives better error messages
  */
 export function unwrap<T>(input: Option<T>): T {
-	if (isNone(input)) {
+	if (input === null || input === undefined) {
 		throw new TypeError("Unwrap called on null/undefined value");
 	}
 	return input as T;
@@ -71,7 +16,7 @@ export function unwrap<T>(input: Option<T>): T {
 	Unwrap option of `null|undefined|T` to `T` throw error with `exceptionMessage` if value is not `T`
  */
 export function expect<T>(input: Option<T>, exceptionMessage: string): T {
-	if (isNone(input)) {
+	if (input === null || input === undefined) {
 		throw new TypeError(exceptionMessage);
 	}
 	return input as T;

src/lib/util.ts

@@ -1,4 +1,3 @@
-import { Option, ifSome } from "./option";
 
 export type Point = [number, number];
 export function addPoint(p1: Point, p2: Point): Point {
@@ -10,24 +9,28 @@ export function addPoint(p1: Point, p2: Point): Point {
 //
 
 // Who needs Jquery?
-export function $(elementId: string): Option<HTMLElement> {
+export function $(elementId: string): null | HTMLElement {
 	return document.getElementById(elementId);
 }
 
 export function createCanvas(
 	width: number,
 	height: number
-): Option<{ canvas: HTMLCanvasElement; ctx: CanvasRenderingContext2D }> {
-	let ret = null;
-	ifSome(document.createElement("canvas"), (canvas) => {
+): null | { canvas: HTMLCanvasElement; ctx: CanvasRenderingContext2D } {
+	const canvas = document.createElement("canvas");
+	if (canvas === null) {
+		return null;
+	}
 	canvas.width = width;
 	canvas.height = height;
-		ifSome(canvas.getContext("2d"), (ctx) => {
+		
+	const ctx = canvas.getContext("2d");
+	if (ctx === null) {
+		return null;
+	}
 	ctx.imageSmoothingEnabled = false;
-			ret = { canvas, ctx };
-		});
-	});
-	return ret;
+	return { canvas, ctx };
+
 }
 
 export function clearBody(): void {

src/sidebar.ts

@@ -1,6 +1,6 @@
 import { SIDEBAR_HEIGHT, SIDEBAR_WIDTH, TILE_SIZE } from "./constants";
 import { HeldPiece } from "./heldPiece";
-import { addPoint, minMax, pickRandom } from "./lib/util";
+import {  minMax, pickRandom } from "./lib/util";
 import { TETRIS_PIECE, TETRIS_PIECE_LIST } from "./tetrisPieces";
 import { TextureStore } from "./textureStore";