バックエンドとデータベースの導入

.gitignore

@@ -21,3 +21,6 @@ Thumbs.db
 # Vite
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
+
+# prisma
+/generated/

.prettierignore

@@ -5,5 +5,8 @@ yarn.lock
 bun.lock
 bun.lockb
 
+# generated files
+/generated
+
 # Miscellaneous
 /static/

package.json

@@ -4,10 +4,10 @@
   "version": "0.0.1",
   "type": "module",
   "scripts": {
-    "dev": "vite dev",
+    "dev": "bun --env-file=.env vite dev",
     "build": "vite build",
     "preview": "vite preview",
-    "prepare": "svelte-kit sync; lefthook install; true",
+    "prepare": "svelte-kit sync; prisma generate; lefthook install; true",
     "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
     "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
     "format": "prettier --write .",
@@ -29,11 +29,16 @@
     "lefthook": "^1.13.6",
     "prettier": "^3.6.2",
     "prettier-plugin-svelte": "^3.4.0",
+    "prisma": "^6.19.0",
     "svelte": "^5.39.5",
     "svelte-check": "^4.3.2",
     "tailwindcss": "^4.1.14",
     "typescript": "^5.9.2",
     "typescript-eslint": "^8.44.1",
     "vite": "^7.1.7"
+  },
+  "dependencies": {
+    "@prisma/adapter-pg": "^6.19.0",
+    "@prisma/client": "^6.19.0"
   }
 }

prisma/migrations/migration_lock.toml

@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"

prisma/schema.prisma

@@ -0,0 +1,22 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+// Looking for ways to speed up your queries, or scale easily with your serverless or edge functions?
+// Try Prisma Accelerate: https://pris.ly/cli/accelerate-init
+
+generator client {
+  provider = "prisma-client-js"
+  output   = "../node_modules/@prisma/generated"
+  engineType = "client"           // no Rust engine
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model BoardState {
+  id        Int      @id @default(autoincrement())
+  createdAt DateTime @default(now())
+  boardData Json
+}

src/iframe/life-game.html

@@ -12,8 +12,10 @@ <h1>
     <button id="sizeChangeButton">サイズ変更</button>
 
     <table id="game-board" style="border-collapse: collapse"></table>
-    <button id="randombutton">RANDOM</button>　　　　　　
+    <button id="randombutton">RANDOM</button>
     <button id="resetbutton">RESET</button>
+    <button id="saveButton">SAVE</button>
+    <button id="loadButton">LOAD</button>
     <div id="pattern-button-container"></div>
     <script src="./life-game.js"></script>
   </body>

src/iframe/life-game.js

@@ -31,6 +31,8 @@ const generation = document.getElementById("generation"); //世代を表す文
 const randomButton = document.getElementById("randombutton");
 const resetButton = document.getElementById("resetbutton");
 const sizeChangeButton = document.getElementById("sizeChangeButton");
+const saveButton = document.getElementById("saveButton");
+const loadButton = document.getElementById("loadButton");
 //サイズ入力欄
 const sizeInput = document.getElementById("sizeInput");
 const sizeLabel = document.getElementById("sizeLabel");
@@ -187,3 +189,19 @@ sizeChangeButton.onclick = () => {
   stop();
   updatePatternButtons();
 };
+
+saveButton.onclick = async () => {
+  window.parent.postMessage({ type: "save_board", data: board }, "*");
+};
+
+loadButton.onclick = async () => {
+  window.parent.postMessage({ type: "request:load_board" }, "*");
+};
+
+on.load_board = (loadedBoard) => {
+  console.log("on.load_board");
+  board = loadedBoard;
+  renderBoard();
+  generationChange(0);
+  stop();
+};

src/lib/prisma.server.ts

@@ -0,0 +1,8 @@
+import { PrismaPg } from "@prisma/adapter-pg";
+import { PrismaClient } from "@prisma/generated/client";
+
+export const prisma = new PrismaClient({
+  adapter: new PrismaPg({
+    connectionString: process.env.DATABASE_URL,
+  }),
+});

src/routes/+page.svelte

@@ -7,6 +7,7 @@
   import * as icons from "$lib/icons/index.ts";
   import patterns from "$lib/board-templates";
   import { onMount } from "svelte";
+  import { loadBoard, saveBoard } from "./api.ts";
 
   let code = $state(lifeGameJS);
 
@@ -40,6 +41,33 @@
   function sendEvent(event: string, message?: unknown) {
     preview_iframe?.contentWindow?.postMessage({ type: event, data: message }, "*");
   }
+
+  onMount(() => {
+    const handler = async (event: MessageEvent<unknown>) => {
+      console.log("handler call");
+      const data = event.data as
+        | { type: "unknown event" }
+        | { type: "save_board"; data: boolean[][] }
+        | { type: "request:load_board" };
+      if (data.type === "save_board") {
+        console.log("board saved!");
+        await saveBoard(data.data);
+        return;
+      }
+
+      if (data.type === "request:load_board") {
+        console.log("loaded board");
+        const board = await loadBoard();
+        if (board) {
+          sendEvent("load_board", board);
+        }
+        return;
+      }
+    };
+
+    window.addEventListener("message", handler);
+    return () => window.removeEventListener("message", handler);
+  });
 </script>
 
 <div class="navbar bg-[#E0E0E0] shadow-sm">

src/routes/api.ts

@@ -0,0 +1,42 @@
+export async function saveBoard(board: boolean[][]) {
+  try {
+    const response = await fetch("/api/board", {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify(board),
+    });
+
+    if (!response.ok) {
+      throw new Error("サーバーとの通信に失敗しました。");
+    }
+
+    alert("盤面を保存しました！");
+  } catch (err) {
+    console.error("保存エラー:", err);
+    alert("保存に失敗しました。");
+  }
+}
+
+export async function loadBoard(): Promise<boolean[][] | undefined> {
+  try {
+    const response = await fetch("/api/board");
+
+    if (!response.ok) {
+      if (response.status === 404) {
+        throw new Error("保存されているデータがありません。");
+      } else {
+        throw new Error("サーバーとの通信に失敗しました。");
+      }
+    }
+
+    const loadedBoard = await response.json();
+
+    console.log("fetched board:", loadedBoard);
+    return loadedBoard as boolean[][]; // TODO: add proper types
+  } catch (err) {
+    console.error("読込エラー:", err);
+    alert("読み込みに失敗しました。");
+  }
+}

src/routes/api/board/+server.ts

@@ -0,0 +1,29 @@
+import { json } from "@sveltejs/kit";
+import { prisma } from "@/lib/prisma.server.ts";
+
+export async function POST({ request }) {
+  const boardData = await request.json();
+
+  const newState = await prisma.boardState.create({
+    data: {
+      boardData: boardData,
+    },
+  });
+
+  return json(newState, { status: 201 });
+}
+
+export async function GET() {
+  // データベースから一番「最後」に保存されたデータを1件だけ探す
+  const latestState = await prisma.boardState.findFirst({
+    orderBy: {
+      createdAt: "desc", // 作成日時(createdAt)の降順（desc）で並び替え
+    },
+  });
+
+  if (!latestState) {
+    return json({ message: "No state found" }, { status: 404 });
+  }
+
+  return json(latestState.boardData);
+}