kifu/core-types/Makefile

@@ -1,6 +1,6 @@
 
 SOURCES = $(shell find ../core -name "*.rs")
-dist/core.d.ts: $(SOURCES)
+dist/index.ts: $(SOURCES)
 	mkdir -p dist
-	typeshare ../core --lang=typescript --output-file=dist/core.d.ts
+	typeshare ../core --lang=typescript --output-file=dist/index.ts
 

kifu/core-types/package.json

@@ -2,7 +2,8 @@
   "name": "core-types",
   "version": "0.0.1",
   "description": "",
-  "types": "dist/core.d.ts",
+  "types": "dist/index.ts",
+  "main": "dist/index.ts",
   "scripts": {
     "build": "make",
     "test": "echo \"Error: no test specified\" && exit 1"

kifu/pwa/src/assertNever.ts

@@ -0,0 +1 @@
+export const assertNever = (_: never) => {};

kifu/pwa/src/components/Board.ts

@@ -1,25 +1,239 @@
-export class GoBoard extends HTMLCanvasElement {
+import { BoardElement, Color, Size, CoreRequest } from "core-types";
-  static get observedAttributes() {
+import { assertNever } from "../assertNever";
-    return [];
+
+const MARGIN = 20;
+const BOARD_WIDTH = 800;
+const BOARD_HEIGHT = 800;
+
+type Pixel = { x: number; y: number };
+type Coordinate = { column: number; row: number };
+
+export interface GoBoardProps {
+  board: BoardElement;
+  onClick: (_: CoreRequest) => void;
 }
 
-  constructor() {
+export class GoBoard {
-    super();
+  private board: BoardElement;
+  private pen: Pen;
+  private cursorLocation: Coordinate | null;
+  canvas: HTMLCanvasElement;
+
+  constructor({ board, onClick }: GoBoardProps) {
+    this.board = board;
+    this.canvas = document.createElement("canvas");
+    this.canvas.classList.add("board");
+    this.canvas.width = BOARD_WIDTH;
+    this.canvas.height = BOARD_HEIGHT;
+
+    this.pen = new Pen(
+      this.canvas.width,
+      this.canvas.height,
+      MARGIN,
+      this.board.size.width,
+      this.board.size.height
+    );
+
+    this.cursorLocation = null;
+
+    this.canvas.onmousemove = (event) => {
+      const bounds = this.canvas.getBoundingClientRect();
+      const coordinate = {
+        x: event.clientX - bounds.x,
+        y: event.clientY - bounds.y,
+      };
+
+      let address = this.pen.address(coordinate);
+
+      if (this.cursorLocation != address) {
+        this.cursorLocation = this.pen.address(coordinate);
+        this.renderBoard();
+      }
+    };
+
+    this.canvas.onclick = (_) => {
+      if (this.cursorLocation) {
+        const intersection =
+          this.board.spaces[boardAddress(this.board.size, this.cursorLocation)];
+        switch (intersection.type) {
+          case "Unplayable":
+            break;
+          case "Empty":
+            onClick(intersection.content);
+            break;
+          case "Filled":
+            break;
+          default:
+            assertNever(intersection);
+        }
+      }
+    };
   }
 
-  connectedCallback() {
+  setBoard(board: BoardElement) {
-    this.setAttribute("width", "500");
+    this.board = board;
-    this.setAttribute("height", "500");
+
-    this.classList.add("go-board");
+    this.pen = new Pen(
-    const ctx = this.getContext("2d");
+      this.canvas.width,
+      this.canvas.height,
+      MARGIN,
+      this.board.size.width,
+      this.board.size.height
+    );
+    this.renderBoard();
+  }
+
+  renderBoard() {
+    const ctx = this.canvas.getContext("2d");
     if (!ctx) {
       alert("could not get the canvas context");
-      return;
+      return null;
     }
-    ctx.fillStyle = "rgb(128, 128, 128)";
-    ctx.fillRect(10, 10, 50, 50);
 
-    ctx.fillStyle = "rgba(0, 0, 200, 0.5)";
+    ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
-    ctx.fillRect(30, 30, 50, 50);
+
+    ctx.lineWidth = 2;
+    ctx.strokeStyle = "black";
+    ctx.beginPath();
+    for (var col = 0; col < this.board.size.width; col++) {
+      ctx.moveTo(MARGIN + col * this.pen.hspaceBetween, MARGIN);
+      ctx.lineTo(
+        MARGIN + col * this.pen.hspaceBetween,
+        MARGIN + (this.board.size.height - 1) * this.pen.vspaceBetween
+      );
+    }
+    for (var row = 0; row < this.board.size.height; row++) {
+      ctx.moveTo(MARGIN, MARGIN + row * this.pen.vspaceBetween);
+      ctx.lineTo(
+        MARGIN + (this.board.size.width - 1) * this.pen.hspaceBetween,
+        MARGIN + row * this.pen.vspaceBetween
+      );
+    }
+    ctx.closePath();
+    ctx.stroke();
+
+    this.pen.starPoint(ctx, { column: 3, row: 3 });
+    this.pen.starPoint(ctx, { column: 3, row: 9 });
+    this.pen.starPoint(ctx, { column: 3, row: 15 });
+    this.pen.starPoint(ctx, { column: 9, row: 3 });
+    this.pen.starPoint(ctx, { column: 9, row: 9 });
+    this.pen.starPoint(ctx, { column: 9, row: 15 });
+    this.pen.starPoint(ctx, { column: 15, row: 3 });
+    this.pen.starPoint(ctx, { column: 15, row: 9 });
+    this.pen.starPoint(ctx, { column: 15, row: 15 });
+
+    col = 0;
+    row = 0;
+    for (let idx = 0; idx < this.board.spaces.length; idx++) {
+      const space = this.board.spaces[idx];
+      switch (space.type) {
+        case "Filled":
+          this.pen.stone(ctx, { column: col, row: row }, space.content.color);
+          break;
+        default:
+          break;
+      }
+      col = col + 1;
+      if (col == this.board.size.width) {
+        col = 0;
+        row = row + 1;
       }
     }
+
+    if (this.cursorLocation) {
+      this.pen.ghostStone(ctx, this.cursorLocation, Color.White);
+    }
+  }
+}
+
+class Pen {
+  margin: number;
+  hspaceBetween: number;
+  vspaceBetween: number;
+
+  constructor(
+    width: number,
+    height: number,
+    margin: number,
+    columns: number,
+    rows: number
+  ) {
+    this.margin = margin;
+    this.hspaceBetween = (width - margin * 2) / (columns - 1);
+    this.vspaceBetween = (height - margin * 2) / (rows - 1);
+  }
+
+  starPoint(ctx: CanvasRenderingContext2D, addr: Coordinate) {
+    ctx.fillStyle = "rgba(0, 0, 0, 1.0);";
+    ctx.beginPath();
+    const pixel = this.position(addr);
+    ctx.moveTo(pixel.x, pixel.y);
+    ctx.arc(pixel.x, pixel.y, 5, 0, 2 * Math.PI);
+    ctx.closePath();
+    ctx.fill();
+  }
+
+  ghostStone(ctx: CanvasRenderingContext2D, addr: Coordinate, color: Color) {
+    switch (color) {
+      case Color.White:
+        ctx.fillStyle = "rgba(230, 230, 230, 0.5)";
+        break;
+      case Color.Black:
+        ctx.fillStyle = "rgba(0, 0, 0, 0.5)";
+        break;
+    }
+
+    this.drawStone(ctx, addr);
+  }
+
+  stone(ctx: CanvasRenderingContext2D, addr: Coordinate, color: Color) {
+    switch (color) {
+      case Color.White:
+        ctx.fillStyle = "rgb(230, 230, 230)";
+        break;
+      case Color.Black:
+        ctx.fillStyle = "rgb(0, 0, 0)";
+        break;
+    }
+
+    this.drawStone(ctx, addr);
+  }
+
+  drawStone(ctx: CanvasRenderingContext2D, addr: Coordinate) {
+    ctx.beginPath();
+    const radius = this.hspaceBetween / 2 - 2;
+    const pixel = this.position(addr);
+    ctx.moveTo(pixel.x, pixel.y);
+    ctx.arc(pixel.x, pixel.y, radius, 0, 2.0 * Math.PI);
+    ctx.closePath();
+    ctx.fill();
+  }
+
+  position(addr: Coordinate): Pixel {
+    return {
+      x: this.margin + addr.column * this.hspaceBetween,
+      y: this.margin + addr.row * this.vspaceBetween,
+    };
+  }
+
+  address(pixel: Pixel): Coordinate | null {
+    if (
+      Math.round(pixel.x) < this.margin ||
+      Math.round(pixel.y) < this.margin
+    ) {
+      return null;
+    } else {
+      return {
+        column: Math.round(
+          (Math.round(pixel.x) - this.margin) / this.hspaceBetween
+        ),
+        row: Math.round(
+          (Math.round(pixel.y) - this.margin) / this.vspaceBetween
+        ),
+      };
+    }
+  }
+}
+
+const boardAddress = (size: Size, coordinate: Coordinate): number =>
+  coordinate.column + size.width * coordinate.row;

kifu/pwa/src/kifu.css

@@ -13,7 +13,10 @@ body {
   display: grid;
 }
 
-.go-board {
+canvas {
-    width: 100%;
+    border: 1px solid black;
-    height: 100%;
+}
+
+.board {
+    background-color: rgb(150, 150, 150);
 }

kifu/pwa/src/main.ts

@@ -1,28 +1,62 @@
 import { GoBoard } from "./components/Board";
+import { CoreRequest, CoreResponse } from "core-types";
 import { CoreApi, initCore } from "./coreApi";
+// import { assertNever } from "./assertNever";
 
-window.customElements.define("go-board", GoBoard, { extends: "canvas" });
+class UIState {
+  private currentView: GoBoard | null;
+  private rootElement: HTMLElement;
+  coreApi: CoreApi;
 
-declare global {
+  constructor(coreApi: CoreApi, root: HTMLElement) {
-  interface HTMLElementTagNameMap {
+    this.currentView = null;
-    "go-board": GoBoard;
+    this.rootElement = root;
+    this.coreApi = coreApi;
+
+    if (!root) {
+      console.log("root element not found");
+      return;
+    }
+  }
+
+  processResponse(response: CoreResponse) {
+    switch (response.type) {
+      case "PlayingFieldView":
+        if (this.currentView) {
+          this.currentView.setBoard(response.content.board);
+        } else {
+          this.currentView = new GoBoard({
+            board: response.content.board,
+            onClick: async (request: CoreRequest) => {
+              const response = await this.coreApi.dispatch(request);
+              this.processResponse(response);
+            },
+          });
+          this.rootElement?.appendChild(this.currentView.canvas);
+          this.currentView.renderBoard();
+        }
+        break;
+      default:
+        console.log("impossible branch: ", response);
+        alert("impossible branch");
+        // assertNever(response);
+        break;
+    }
   }
 }
 
 const main = async () => {
   let coreApi = await initCore();
-  let response = await coreApi.playingField();
+  let response = await coreApi.dispatch({ type: "PlayingField" });
-  console.log("playing field response: ", response);
-
   const root = document.getElementById("root");
+
   if (!root) {
-    alert("could not retrieve the app root container");
+    console.log("root element not present");
     return;
   }
 
-  const board = document.createElement("canvas", { is: "go-board" });
+  const uiState = new UIState(coreApi, root);
-  console.log("constructed board: ", board);
+  uiState.processResponse(response);
-  root.appendChild(board);
 };
 
 main();

package-lock.json

@@ -36,6 +36,7 @@
             }
         },
         "kifu/pwa": {
+            "name": "kifu-pwa",
             "version": "1.0.0",
             "license": "GPL-3.0-or-later",
             "dependencies": {