init

2026-05-24 15:32:36 +00:00
commit 1eb5350d09
20 changed files with 2852 additions and 0 deletions
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 node_modules
 dist
 data
 .git
 coverage
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 # dependencies (bun install)
 node_modules
 # output
 out
 dist
 *.tgz
 data
 # code coverage
 coverage
 *.lcov
 # logs
 logs
 _.log
 report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 # dotenv environment variable files
 .env
 .env.development.local
 .env.test.local
 .env.production.local
 .env.local
 # caches
 .eslintcache
 .cache
 *.tsbuildinfo
 # IntelliJ based IDEs
 .idea
 # Finder (MacOS) folder config
 .DS_Store
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 FROM oven/bun:1.3.11-alpine AS build
 WORKDIR /app
 COPY package.json bun.lock tsconfig.json ./
 RUN bun install --frozen-lockfile
 COPY src ./src
 COPY README.md ./
 RUN bun run build
 FROM oven/bun:1.3.11-alpine AS runner
 WORKDIR /app/dist
 ENV NODE_ENV=production
 ENV HOST=0.0.0.0
 ENV PORT=3000
 ENV DATABASE_PATH=/data/excalidraw.sqlite
 COPY --from=build /app/dist ./
 RUN mkdir -p /data
 EXPOSE 3000
 CMD ["bun", "./server.js"]
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 # Project: `excalidraw-box`
 ## Goal
 Build a small self-hosted web app that provides:
 ```text
 - Excalidraw editor
 - Server-side autosave to SQLite
 - No collaboration
 - No accounts inside the app
 - Reverse-proxy auth handled by Caddy
 - Manual export to PNG/SVG/.excalidraw
 - Docker Compose deployment
 ```
 The app should be intentionally small and auditable.
 ---
 # Non-goals
 Do **not** implement:
 ```text
 - real-time collaboration
 - public sharing links
 - user accounts
 - teams/workspaces
 - comments
 - Firebase
 - S3/MinIO in v1
 - complex permissions
 ```
 Authentication is handled outside the app by Caddy `basic_auth` or later Authelia/AuthentiK.
 ---
 # Stack
 Use:
 ```text
 Next.js App Router
 React
 TypeScript
@excalidraw/excalidraw
 better-sqlite3
 Docker Compose
 Caddy reverse proxy
 ```
 Rationale:
 - `@excalidraw/excalidraw` is the official embeddable package. ([npm][1])
 - Excalidraw exposes `onChange(elements, appState, files)` for persistence. ([Excalidraw Docs][2])
 - Excalidraw provides export utilities such as `exportToCanvas` for rendering scenes to images. ([Excalidraw Docs][3])
 - Next.js officially supports standalone Docker deployment. ([Next.js][4])
 ---
 # Version 1 feature set
 ## V1 must have
 ```text
 1. Single default drawing
 2. Load drawing from SQLite on page load
 3. Autosave drawing to SQLite after edits
 4. Debounce saves by 1.5 seconds
 5. Show save status:
   - Saved
   - Saving…
   - Save failed
 6. Export PNG from the current scene
 7. Export .excalidraw JSON from the current scene
 8. Persist SQLite database under /data
 9. Dockerfile
 10. docker-compose.yml
 11. Caddyfile example
 ```
 ## V1 should avoid
 ```text
 - multiple drawings
 - login UI
 - sharing
 - collaboration
 - migrations framework
 - Prisma, unless really needed
 ```
 Use plain `better-sqlite3` to keep the code small.
 ---
 # Directory structure
 ```text
 excalidraw-autosave/
  app/
    api/
      drawing/
        route.ts
    globals.css
    layout.tsx
    page.tsx
  components/
    ExcalidrawClient.tsx
  lib/
    db.ts
    scene.ts
    debounce.ts
  public/
  Dockerfile
  docker-compose.yml
  Caddyfile.example
  next.config.ts
  package.json
  tsconfig.json
  .dockerignore
  README.md
 ```
 ---
 # Data model
 Use one SQLite table.
 ```sql
 CREATE TABLE IF NOT EXISTS drawings (
  id TEXT PRIMARY KEY,
  data TEXT NOT NULL,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
 ```
 For v1, always use:
 ```text
 id = "default"
 ```
 Stored `data` should be the scene object:
 ```json
 {
  "type": "excalidraw-autosave-scene",
  "version": 1,
  "elements": [],
  "appState": {},
  "files": {}
 }
 ```
 Do not store only rendered PNG. Store the editable scene JSON as the source of truth.
 ---
 # API design
 ## `GET /api/drawing`
 Returns the saved drawing.
 If no drawing exists, return an empty scene:
 ```json
 {
  "type": "excalidraw-autosave-scene",
  "version": 1,
  "elements": [],
  "appState": {},
  "files": {}
 }
 ```
 ## `POST /api/drawing`
 Accepts:
 ```json
 {
  "elements": [],
  "appState": {},
  "files": {}
 }
 ```
 Behavior:
 ```text
 - Validate body is an object.
 - Validate elements is an array.
 - Validate appState is an object.
 - Validate files is an object.
 - Strip volatile or UI-only appState fields if needed.
 - Save JSON to SQLite.
 - Upsert row id = "default".
 - Return { "ok": true, "updatedAt": "..." }.
 ```
 ## Optional `GET /api/health`
 Returns:
 ```json
 {
  "ok": true
 }
 ```
 Useful for Docker health checks.
 ---
 # Scene handling
 Create `lib/scene.ts`.
 Responsibilities:
 ```text
 - define EmptyScene
 - normalize incoming scene
 - remove unwanted volatile appState fields
 - cap payload size
 ```
 Recommended payload size cap for v1:
 ```text
 25 MB
 ```
 If the scene exceeds this, return HTTP `413 Payload Too Large`.
 Reason: Excalidraw embedded images are stored under `files`; they can make scene JSON large.
 ---
 # Frontend behavior
 ## Page load
 ```text
 1. Render loading state.
 2. Fetch /api/drawing.
 3. Pass returned scene to Excalidraw as initialData.
 4. Render editor full-screen.
 ```
 The official integration docs show that the Excalidraw component should be used client-side in Next.js, with `"use client"` and the Excalidraw CSS import. ([Excalidraw Docs][5])
 ## Autosave
 Use Excalidraw’s `onChange`.
 Pseudo-flow:
 ```tsx
 onChange={(elements, appState, files) => {
  setSaveStatus("dirty");
  debouncedSave({ elements, appState, files });
 }}
 ```
 Debounced save:
 ```text
 - wait 1500 ms after last change
 - POST to /api/drawing
 - set status Saving… while request in flight
 - set status Saved after success
 - set status Save failed after failure
 ```
 Important: Do not save on every pointer movement without debounce.
 ## Save status UI
 A small fixed indicator:
 ```text
 top-right:
  Saved
  Saving…
  Save failed
 ```
 Optionally show last saved timestamp.
 ---
 # Export behavior
 ## `.excalidraw` export
 Implement client-side export by taking the current scene and downloading JSON.
 Filename:
 ```text
 drawing-YYYY-MM-DD-HHMM.excalidraw
 ```
 Content:
 ```json
 {
  "type": "excalidraw",
  "version": 2,
  "source": "https://excalidraw.com",
  "elements": [],
  "appState": {},
  "files": {}
 }
 ```
 This keeps compatibility with regular Excalidraw import/export. The Excalidraw repo describes the open `.excalidraw` JSON file format as a supported feature. ([GitHub][6])
 ## PNG export
 Use Excalidraw export utilities client-side.
 The docs show `exportToCanvas` exported from `@excalidraw/excalidraw`; it takes `elements`, `appState`, and export dimensions. ([Excalidraw Docs][3])
 Implementation idea:
 ```tsx
 import { exportToCanvas } from "@excalidraw/excalidraw";
 const canvas = await exportToCanvas({
  elements,
  appState: {
    ...appState,
    exportBackground: true,
  },
  files,
  getDimensions: (width, height) => ({
    width,
    height,
    scale: 2,
  }),
 });
 const blob = await new Promise<Blob>((resolve) =>
  canvas.toBlob((blob) => resolve(blob!), "image/png"),
 );
 ```
 Then trigger browser download.
 Do PNG export client-side first. It avoids needing headless browser rendering on the server.
 ---
 # Important implementation detail: access to current scene
 Use `excalidrawAPI`.
 The Excalidraw API exposes methods such as `getFiles`. ([Excalidraw Docs][7])
 Store latest values from `onChange` in React refs:
 ```tsx
 const latestSceneRef = useRef({
  elements: [],
  appState: {},
  files: {},
 });
 ```
 Update it inside `onChange`.
 Use that ref for export buttons.
 ---
 # Suggested files
 ## `package.json`
 ```json
 {
  "name": "excalidraw-autosave",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint",
    "typecheck": "tsc --noEmit"
  },
  "dependencies": {
    "@excalidraw/excalidraw": "latest",
    "better-sqlite3": "latest",
    "next": "latest",
    "react": "latest",
    "react-dom": "latest"
  },
  "devDependencies": {
    "@types/better-sqlite3": "latest",
    "@types/node": "latest",
    "@types/react": "latest",
    "@types/react-dom": "latest",
    "typescript": "latest"
  }
 }
 ```
 ## `next.config.ts`
 ```ts
 import type { NextConfig } from "next";
 const nextConfig: NextConfig = {
  output: "standalone",
 };
 export default nextConfig;
 ```
 ---
 # Database module
 ## `lib/db.ts`
 Requirements:
 ```text
 - Read DATABASE_PATH from env
 - Default to /data/excalidraw.sqlite
 - Ensure parent directory exists
 - Initialize schema
 - Export getDrawing() and saveDrawing()
 ```
 Pseudo-code:
 ```ts
 import Database from "better-sqlite3";
 import fs from "node:fs";
 import path from "node:path";
 const dbPath = process.env.DATABASE_PATH ?? "/data/excalidraw.sqlite";
 fs.mkdirSync(path.dirname(dbPath), { recursive: true });
 const db = new Database(dbPath);
 db.pragma("journal_mode = WAL");
 db.exec(`
  CREATE TABLE IF NOT EXISTS drawings (
    id TEXT PRIMARY KEY,
    data TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
  )
 `);
 export function getDrawing(id = "default") {
  const row = db.prepare("SELECT data FROM drawings WHERE id = ?").get(id) as
    | { data: string }
    | undefined;
  return row ? JSON.parse(row.data) : null;
 }
 export function saveDrawing(data: unknown, id = "default") {
  const serialized = JSON.stringify(data);
  db.prepare(
    `
    INSERT INTO drawings (id, data, created_at, updated_at)
    VALUES (?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
    ON CONFLICT(id) DO UPDATE SET
      data = excluded.data,
      updated_at = CURRENT_TIMESTAMP
  `,
  ).run(id, serialized);
  return new Date().toISOString();
 }
 ```
 ---
 # API route
 ## `app/api/drawing/route.ts`
 Requirements:
 ```text
 - Force Node runtime, not Edge
 - GET returns saved or empty scene
 - POST saves normalized scene
 - Handle invalid JSON
 - Enforce payload size cap
 ```
 Add:
 ```ts
 export const runtime = "nodejs";
 ```
 Pseudo-code:
 ```ts
 import { NextResponse } from "next/server";
 import { getDrawing, saveDrawing } from "@/lib/db";
 import { emptyScene, normalizeScene } from "@/lib/scene";
 export const runtime = "nodejs";
 export async function GET() {
  const saved = getDrawing("default");
  return NextResponse.json(saved ?? emptyScene());
 }
 export async function POST(req: Request) {
  const text = await req.text();
  if (text.length > 25 * 1024 * 1024) {
    return NextResponse.json(
      { ok: false, error: "Scene too large" },
      { status: 413 },
    );
  }
  let raw: unknown;
  try {
    raw = JSON.parse(text);
  } catch {
    return NextResponse.json(
      { ok: false, error: "Invalid JSON" },
      { status: 400 },
    );
  }
  const scene = normalizeScene(raw);
  const updatedAt = saveDrawing(scene, "default");
  return NextResponse.json({ ok: true, updatedAt });
 }
 ```
 ---
 # Client component
 ## `components/ExcalidrawClient.tsx`
 Requirements:
 ```text
 - "use client"
 - import Excalidraw and CSS
 - fetch initial data
 - render full viewport
 - onChange debounced autosave
 - export JSON button
 - export PNG button
 - save status
 ```
 Important:
 ```tsx
 import "@excalidraw/excalidraw/index.css";
 ```
 Use a custom debounce instead of lodash to avoid another dependency.
 ---
 # CSS/UI
 Keep UI minimal.
 ```text
 - Editor fills viewport.
 - Floating toolbar at top-right.
 - Buttons:
  - Export PNG
  - Export .excalidraw
 - Save status badge:
  - Saved
  - Saving…
  - Failed
 ```
 Do not attempt to reproduce Excalidraw’s own toolbar.
 ---
 # Docker
 ## `Dockerfile`
 Use Next.js standalone output.
 ```dockerfile
 FROM node:22-alpine AS deps
 WORKDIR /app
 COPY package.json package-lock.json* ./
 RUN npm install
 FROM node:22-alpine AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 RUN npm run build
 FROM node:22-alpine AS runner
 WORKDIR /app
 ENV NODE_ENV=production
 ENV PORT=3000
 ENV HOSTNAME=0.0.0.0
 ENV DATABASE_PATH=/data/excalidraw.sqlite
 RUN mkdir -p /data
 COPY --from=builder /app/public ./public
 COPY --from=builder /app/.next/standalone ./
 COPY --from=builder /app/.next/static ./.next/static
 EXPOSE 3000
 CMD ["node", "server.js"]
 ```
 ## `docker-compose.yml`
 ```yaml
 services:
  excalidraw-autosave:
    build: .
    container_name: excalidraw-autosave
    expose:
      - "3000"
    environment:
      DATABASE_PATH: /data/excalidraw.sqlite
    volumes:
      - ./data:/data
    restart: unless-stopped
  caddy:
    image: caddy:latest
    container_name: excalidraw-caddy
    depends_on:
      - excalidraw-autosave
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./Caddyfile.example:/etc/caddy/Caddyfile:ro
      - caddy_data:/data
      - caddy_config:/config
    restart: unless-stopped
 volumes:
  caddy_data:
  caddy_config:
 ```
 ## `Caddyfile.example`
 ```caddyfile
 draw.example.com {
  basic_auth {
    zero REPLACE_WITH_CADDY_HASH
  }
  reverse_proxy excalidraw-autosave:3000
 }
 ```
 Generate password hash:
 ```bash
 docker run --rm -it caddy:latest caddy hash-password
 ```
 ---
 # Backup plan
 SQLite file:
 ```text
 ./data/excalidraw.sqlite
 ```
 Backup command:
 ```bash
 mkdir -p ./backups
 sqlite3 ./data/excalidraw.sqlite ".backup './backups/excalidraw-$(date +%F-%H%M).sqlite'"
 ```
 Recommended cron:
 ```cron
 0 3 * * * cd /path/to/excalidraw-autosave && sqlite3 ./data/excalidraw.sqlite ".backup './backups/excalidraw-$(date +\%F-\%H\%M).sqlite'"
 ```
 Also back up `.excalidraw` exports manually for critical drawings.
 ---
 # Security model
 V1 app assumes:
 ```text
 - It is not public without reverse proxy auth.
 - Caddy handles TLS.
 - Caddy handles basic_auth.
 - The app does not implement users.
 - The app should not expose port 3000 to the public internet.
 ```
 In Compose, use:
 ```yaml
 expose:
  - "3000"
 ```
 Do **not** use:
 ```yaml
 ports:
  - "3000:3000"
 ```
 unless testing locally.
 ---
 # Acceptance criteria
 Codex should finish with a repo that satisfies:
 ```text
 1. `npm run dev` opens editor locally.
 2. Drawing reloads after refresh.
 3. Drawing persists after app restart.
 4. Docker Compose starts Caddy + app.
 5. SQLite DB is created under ./data.
 6. No direct public app port is exposed.
 7. Export PNG downloads a PNG.
 8. Export .excalidraw downloads editable JSON.
 9. Autosave status visibly changes.
 10. No collaboration code exists.
 ```
 Manual test:
 ```text
 1. Start app.
 2. Draw rectangle and text.
 3. Wait until status says Saved.
 4. Refresh browser.
 5. Confirm rectangle and text remain.
 6. Restart container.
 7. Confirm drawing remains.
 8. Export PNG.
 9. Export .excalidraw.
 10. Import .excalidraw into official Excalidraw and confirm it opens.
 ```
 ---
 # Future V2, only after V1 works
 Add these later, not now:
 ```text
 - multiple named drawings
 - drawing list page
 - thumbnails
 - duplicate drawing
 - delete drawing
 - server-side export endpoint
 - periodic backup UI
 - WebDAV/S3 export
 - basic file manager
 ```
 For V2 multiple drawings, change routes to:
 ```text
 GET    /api/drawings
 POST   /api/drawings
 GET    /api/drawings/:id
 PUT    /api/drawings/:id
 DELETE /api/drawings/:id
 ```
 Schema:
 ```sql
 CREATE TABLE drawings (
  id TEXT PRIMARY KEY,
  title TEXT NOT NULL,
  data TEXT NOT NULL,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
 ```
 ---
 # Instruction
 Build the V1 exactly as specified. Keep code minimal. Do not add accounts, collaboration, sharing, Firebase, Prisma, Tailwind, or extra abstractions. Use the official `@excalidraw/excalidraw` package and SQLite persistence through `better-sqlite3`. Use Caddy for auth in the deployment example.
@@ -0,0 +1,26 @@
 # excali
 Private self-hosted Excalidraw with Bun and SQLite.
 ## Run locally
 ```bash
 bun install
 bun run dev
 ```
 Open `http://localhost:3000`.
 ## Test
 ```bash
 bun run test
 bun run typecheck
 ```
 ## Build the image
 ```bash
 docker build -t excali .
 docker run --rm -p 3000:3000 -v "$PWD/data:/data" excali
 ```
@@ -0,0 +1,565 @@
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  "lockfileVersion": 1,
  "configVersion": 1,
  "workspaces": {
    "": {
      "name": "excali",
      "dependencies": {
        "@excalidraw/excalidraw": "^0.18.1",
        "react": "^19.2.6",
        "react-dom": "^19.2.6",
      },
      "devDependencies": {
        "@types/bun": "^1.3.14",
        "@types/react": "^19.2.15",
        "@types/react-dom": "^19.2.3",
        "typescript": "^5.9.3",
      },
    },
  },
  "packages": {
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  }
 }
@@ -0,0 +1,23 @@
 {
  "name": "excali",
  "type": "module",
  "private": true,
  "scripts": {
    "dev": "bun --hot src/server.tsx",
    "build": "rm -rf dist && bun build --target=bun ./src/server.tsx --outdir ./dist",
    "start": "cd dist && DATABASE_PATH=../data/excalidraw.sqlite bun ./server.js",
    "test": "bun test",
    "typecheck": "tsc --noEmit"
  },
  "dependencies": {
    "@excalidraw/excalidraw": "^0.18.1",
    "react": "^19.2.6",
    "react-dom": "^19.2.6"
  },
  "devDependencies": {
    "@types/bun": "^1.3.14",
    "@types/react": "^19.2.15",
    "@types/react-dom": "^19.2.3",
    "typescript": "^5.9.3"
  }
 }
@@ -0,0 +1,477 @@
 import "../node_modules/@excalidraw/excalidraw/dist/prod/index.css";
 import {
  Excalidraw,
  exportToBlob,
  serializeAsJSON,
 } from "@excalidraw/excalidraw";
 import type {
  AppState,
  BinaryFiles,
  ExcalidrawInitialDataState,
 } from "@excalidraw/excalidraw/types";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { DEFAULT_TITLE, type DrawingMeta, type ScenePayload } from "./shared";
 type SaveStatus = "saved" | "saving" | "failed";
 type DrawingResponse = DrawingMeta & ScenePayload;
 function pathToId(pathname = window.location.pathname): string | null {
  const match = pathname.match(/^\/d\/([^/]+)$/);
  return match?.[1] ?? null;
 }
 function sortDrawings(drawings: DrawingMeta[]): DrawingMeta[] {
  return [...drawings].sort((a, b) => b.updatedAt.localeCompare(a.updatedAt));
 }
 function replaceMeta(drawings: DrawingMeta[], drawing: DrawingMeta): DrawingMeta[] {
  const filtered = drawings.filter((item) => item.id !== drawing.id);
  return sortDrawings([drawing, ...filtered]);
 }
 function sceneToInitialData(scene: ScenePayload): ExcalidrawInitialDataState {
  return scene as ExcalidrawInitialDataState;
 }
 function sceneFromEditor(
  elements: readonly unknown[],
  appState: AppState,
  files: BinaryFiles,
 ): ScenePayload {
  return {
    elements: [...elements],
    appState: appState as unknown as Record<string, unknown>,
    files: files as unknown as Record<string, unknown>,
  };
 }
 function downloadBlob(blob: Blob, filename: string) {
  const url = URL.createObjectURL(blob);
  const link = document.createElement("a");
  link.href = url;
  link.download = filename;
  link.click();
  URL.revokeObjectURL(url);
 }
 function filenameBase(title: string): string {
  const safeTitle = title
    .trim()
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, "-")
    .replace(/^-+|-+$/g, "");
  const now = new Date();
  const stamp = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, "0")}-${String(
    now.getDate(),
  ).padStart(2, "0")}-${String(now.getHours()).padStart(2, "0")}${String(
    now.getMinutes(),
  ).padStart(2, "0")}`;
  return `${safeTitle || "drawing"}-${stamp}`;
 }
 async function requestJson<T>(url: string, init?: RequestInit): Promise<T> {
  const response = await fetch(url, {
    ...init,
    headers: {
      ...(init?.body ? { "content-type": "application/json" } : {}),
      ...init?.headers,
    },
  });
  const body = (await response.json()) as T & { error?: string };
  if (!response.ok) {
    throw new Error(body.error ?? `Request failed: ${response.status}`);
  }
  return body;
 }
 export function App() {
  const [drawings, setDrawings] = useState<DrawingMeta[]>([]);
  const [activeId, setActiveId] = useState<string | null>(pathToId());
  const [activeTitle, setActiveTitle] = useState(DEFAULT_TITLE);
  const [scene, setScene] = useState<ScenePayload | null>(null);
  const [loading, setLoading] = useState(true);
  const [saveStatus, setSaveStatus] = useState<SaveStatus>("saved");
  const [error, setError] = useState<string | null>(null);
  const currentIdRef = useRef<string | null>(activeId);
  const currentTitleRef = useRef(activeTitle);
  const latestSceneRef = useRef<ScenePayload | null>(null);
  const ignoreChangeRef = useRef(false);
  const timeoutRef = useRef<number | null>(null);
  const inFlightSaveRef = useRef<Promise<void> | null>(null);
  const loadVersionRef = useRef(0);
  const activeDrawing = useMemo(
    () => drawings.find((drawing) => drawing.id === activeId) ?? null,
    [activeId, drawings],
  );
  const refreshList = useCallback(async () => {
    const list = await requestJson<DrawingMeta[]>("/api/drawings", { method: "GET" });
    setDrawings(sortDrawings(list));
    return list;
  }, []);
  const saveScene = useCallback(async () => {
    const drawingId = currentIdRef.current;
    const nextScene = latestSceneRef.current;
    if (!drawingId || !nextScene) {
      return;
    }
    setSaveStatus("saving");
    setError(null);
    const promise = requestJson<{ ok: true; drawing: DrawingMeta }>(`/api/drawings/${drawingId}`, {
      method: "PUT",
      body: JSON.stringify(nextScene),
    })
      .then((body) => {
        setDrawings((current) => replaceMeta(current, body.drawing));
        setSaveStatus("saved");
      })
      .catch((saveError: unknown) => {
        setSaveStatus("failed");
        setError(saveError instanceof Error ? saveError.message : "Save failed");
        throw saveError;
      })
      .finally(() => {
        inFlightSaveRef.current = null;
      });
    inFlightSaveRef.current = promise;
    await promise;
  }, []);
  const flushPendingSave = useCallback(async () => {
    if (timeoutRef.current !== null) {
      clearTimeout(timeoutRef.current);
      timeoutRef.current = null;
      await saveScene();
      return;
    }
    if (inFlightSaveRef.current) {
      await inFlightSaveRef.current;
    }
  }, [saveScene]);
  const scheduleSave = useCallback(() => {
    if (timeoutRef.current !== null) {
      clearTimeout(timeoutRef.current);
    }
    setSaveStatus("saving");
    timeoutRef.current = window.setTimeout(() => {
      timeoutRef.current = null;
      void saveScene();
    }, 1500);
  }, [saveScene]);
  const loadDrawing = useCallback(
    async (drawingId: string) => {
      const version = ++loadVersionRef.current;
      setLoading(true);
      setError(null);
      try {
        const [list, drawing] = await Promise.all([
          requestJson<DrawingMeta[]>("/api/drawings", { method: "GET" }),
          requestJson<DrawingResponse>(`/api/drawings/${drawingId}`, { method: "GET" }),
        ]);
        if (version !== loadVersionRef.current) {
          return;
        }
        const nextScene = {
          elements: drawing.elements,
          appState: drawing.appState,
          files: drawing.files,
        };
        ignoreChangeRef.current = true;
        currentIdRef.current = drawing.id;
        currentTitleRef.current = drawing.title;
        latestSceneRef.current = nextScene;
        setDrawings(sortDrawings(list));
        setActiveId(drawing.id);
        setActiveTitle(drawing.title);
        setScene(nextScene);
        setSaveStatus("saved");
      } catch (loadError) {
        const list = await refreshList();
        if (list.length === 0) {
          const created = await requestJson<DrawingResponse>("/api/drawings", { method: "POST" });
          window.history.replaceState(null, "", `/d/${created.id}`);
          await loadDrawing(created.id);
          return;
        }
        const fallback = list[0];
        if (fallback && fallback.id !== drawingId) {
          window.history.replaceState(null, "", `/d/${fallback.id}`);
          await loadDrawing(fallback.id);
          return;
        }
        setError(loadError instanceof Error ? loadError.message : "Failed to load drawing");
      } finally {
        if (version === loadVersionRef.current) {
          setLoading(false);
        }
      }
    },
    [refreshList],
  );
  const navigateToDrawing = useCallback(
    async (drawingId: string, options?: { replace?: boolean; flush?: boolean }) => {
      const replace = options?.replace ?? false;
      const flush = options?.flush ?? true;
      if (drawingId === currentIdRef.current && latestSceneRef.current) {
        if (replace) {
          window.history.replaceState(null, "", `/d/${drawingId}`);
        }
        return;
      }
      if (flush) {
        await flushPendingSave();
      }
      if (replace) {
        window.history.replaceState(null, "", `/d/${drawingId}`);
      } else {
        window.history.pushState(null, "", `/d/${drawingId}`);
      }
      await loadDrawing(drawingId);
    },
    [flushPendingSave, loadDrawing],
  );
  const createDrawing = useCallback(async () => {
    await flushPendingSave();
    const created = await requestJson<DrawingResponse>("/api/drawings", { method: "POST" });
    await navigateToDrawing(created.id, { flush: false });
  }, [flushPendingSave, navigateToDrawing]);
  const deleteDrawing = useCallback(
    async (drawingId: string) => {
      if (!window.confirm("Delete this drawing?")) {
        return;
      }
      if (drawingId === currentIdRef.current) {
        await flushPendingSave();
      }
      const response = await requestJson<{ ok: true; nextId: string | null }>(`/api/drawings/${drawingId}`, {
        method: "DELETE",
      });
      if (drawingId === currentIdRef.current && response.nextId) {
        await navigateToDrawing(response.nextId, { replace: true, flush: false });
      } else {
        await refreshList();
      }
    },
    [flushPendingSave, navigateToDrawing, refreshList],
  );
  const handleTitleSubmit = useCallback(async () => {
    const drawingId = currentIdRef.current;
    if (!drawingId) {
      return;
    }
    try {
      const body = await requestJson<{ ok: true; drawing: DrawingMeta }>(`/api/drawings/${drawingId}`, {
        method: "PUT",
        body: JSON.stringify({ title: currentTitleRef.current }),
      });
      currentTitleRef.current = body.drawing.title;
      setActiveTitle(body.drawing.title);
      setDrawings((current) => replaceMeta(current, body.drawing));
    } catch (renameError) {
      setError(renameError instanceof Error ? renameError.message : "Rename failed");
    }
  }, []);
  const exportPng = useCallback(async () => {
    const latest = latestSceneRef.current;
    if (!latest) {
      return;
    }
    const blob = await exportToBlob({
      elements: latest.elements as never[],
      appState: {
        ...(latest.appState as unknown as AppState),
        exportBackground: true,
      },
      files: latest.files as BinaryFiles,
      mimeType: "image/png",
      getDimensions: (width: number, height: number) => ({
        width,
        height,
        scale: 2,
      }),
    });
    downloadBlob(blob, `${filenameBase(currentTitleRef.current)}.png`);
  }, []);
  const exportExcalidraw = useCallback(() => {
    const latest = latestSceneRef.current;
    if (!latest) {
      return;
    }
    const json = serializeAsJSON(
      latest.elements as never[],
      latest.appState as Partial<AppState>,
      latest.files as BinaryFiles,
      "local",
    );
    downloadBlob(
      new Blob([json], { type: "application/json" }),
      `${filenameBase(currentTitleRef.current)}.excalidraw`,
    );
  }, []);
  useEffect(() => {
    const currentPathId = pathToId();
    if (currentPathId) {
      void loadDrawing(currentPathId);
    } else {
      window.location.replace("/");
    }
    const onPopState = () => {
      const nextId = pathToId();
      if (nextId) {
        void navigateToDrawing(nextId, { replace: true, flush: true });
      }
    };
    window.addEventListener("popstate", onPopState);
    return () => {
      window.removeEventListener("popstate", onPopState);
    };
  }, [loadDrawing, navigateToDrawing]);
  useEffect(() => {
    return () => {
      if (timeoutRef.current !== null) {
        clearTimeout(timeoutRef.current);
      }
    };
  }, []);
  return (
    <div className="app-shell">
      <aside className="sidebar">
        <div className="sidebar-header">
          <h1>excali</h1>
          <button type="button" className="primary-button" onClick={() => void createDrawing()}>
            New
          </button>
        </div>
        <div className="drawing-list">
          {drawings.map((drawing) => (
            <div
              key={drawing.id}
              className={drawing.id === activeId ? "drawing-item drawing-item-active" : "drawing-item"}
            >
              {drawing.id === activeId ? (
                <div className="drawing-link">
                  <input
                    className="title-input"
                    value={activeTitle}
                    onChange={(event) => {
                      currentTitleRef.current = event.target.value;
                      setActiveTitle(event.target.value);
                    }}
                    onBlur={() => void handleTitleSubmit()}
                    onKeyDown={(event) => {
                      if (event.key === "Enter") {
                        event.currentTarget.blur();
                      }
                    }}
                  />
                </div>
              ) : (
                <button
                  type="button"
                  className="drawing-link"
                  onClick={() => void navigateToDrawing(drawing.id)}
                >
                  <span className="drawing-title">{drawing.title}</span>
                </button>
              )}
              <button
                type="button"
                className="icon-button"
                onClick={() => void deleteDrawing(drawing.id)}
                aria-label={`Delete ${drawing.title}`}
              >
                ×
              </button>
            </div>
          ))}
        </div>
      </aside>
      <main className="editor-shell">
        <div className="toolbar">
          <span className={`status-badge status-${saveStatus}`}>
            {saveStatus === "saving" ? "Saving..." : saveStatus === "failed" ? "Save failed" : "Saved"}
          </span>
          <button type="button" className="secondary-button" onClick={() => void exportPng()} disabled={!scene}>
            Export PNG
          </button>
          <button
            type="button"
            className="secondary-button"
            onClick={exportExcalidraw}
            disabled={!scene}
          >
            Export .excalidraw
          </button>
        </div>
        {loading || !scene ? (
          <div className="editor-loading">{error ?? "Loading..."}</div>
        ) : (
          <div className="editor-frame">
            <Excalidraw
              key={activeDrawing?.id ?? activeId}
              initialData={sceneToInitialData(scene)}
              onChange={(elements, appState, files) => {
                latestSceneRef.current = sceneFromEditor(elements, appState, files);
                if (ignoreChangeRef.current) {
                  ignoreChangeRef.current = false;
                  return;
                }
                scheduleSave();
              }}
            />
          </div>
        )}
      </main>
    </div>
  );
 }
@@ -0,0 +1,73 @@
 import { describe, expect, test } from "bun:test";
 import { mkdtempSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { createApi } from "./api";
 import { createDrawingStore } from "./db";
 function withApi() {
  const dir = mkdtempSync(join(tmpdir(), "excali-api-"));
  const store = createDrawingStore(join(dir, "test.sqlite"));
  const api = createApi(store);
  return {
    api,
    cleanup() {
      store.close();
      rmSync(dir, { recursive: true, force: true });
    },
  };
 }
 describe("api", () => {
  test("returns 400 for invalid JSON", async () => {
    const { api, cleanup } = withApi();
    const drawing = await api.createDrawing().json();
    const response = await api.updateDrawing(
      Object.assign(
        new Request(`http://local/api/drawings/${drawing.id}`, {
          method: "PUT",
          body: "{",
        }),
        { params: { id: drawing.id } },
      ),
    );
    expect(response.status).toBe(400);
    cleanup();
  });
  test("returns 404 for missing drawing", () => {
    const { api, cleanup } = withApi();
    const response = api.getDrawing(
      Object.assign(new Request("http://local/api/drawings/missing"), { params: { id: "missing" } }),
    );
    expect(response.status).toBe(404);
    cleanup();
  });
  test("updates a drawing scene", async () => {
    const { api, cleanup } = withApi();
    const created = await api.createDrawing().json();
    const response = await api.updateDrawing(
      Object.assign(
        new Request(`http://local/api/drawings/${created.id}`, {
          method: "PUT",
          body: JSON.stringify({
            elements: [{ id: "shape" }],
            appState: {},
            files: {},
          }),
        }),
        { params: { id: created.id } },
      ),
    );
    expect(response.status).toBe(200);
    cleanup();
  });
 });
@@ -0,0 +1,119 @@
 import { type DrawingStore } from "./db";
 import { HttpError, normalizeTitle, parseJsonBody, parseSceneText } from "./scene";
 type RouteRequest = Request & {
  params?: Record<string, string>;
 };
 function json(data: unknown, init?: ResponseInit): Response {
  return Response.json(data, init);
 }
 function errorResponse(error: unknown): Response {
  if (error instanceof HttpError) {
    return json({ ok: false, error: error.message }, { status: error.status });
  }
  console.error(error);
  return json({ ok: false, error: "Internal server error" }, { status: 500 });
 }
 export function createApi(store: DrawingStore) {
  return {
    health() {
      return json({ ok: true });
    },
    listDrawings() {
      return json(store.listDrawings());
    },
    createDrawing() {
      const drawing = store.createDrawing();
      return json(
        {
          id: drawing.id,
          title: drawing.title,
          createdAt: drawing.createdAt,
          updatedAt: drawing.updatedAt,
          ...drawing.scene,
        },
        { status: 201 },
      );
    },
    getDrawing(request: RouteRequest) {
      const id = request.params?.id;
      const drawing = id ? store.getDrawing(id) : null;
      if (!drawing) {
        return json({ ok: false, error: "Drawing not found" }, { status: 404 });
      }
      return json({
        id: drawing.id,
        title: drawing.title,
        createdAt: drawing.createdAt,
        updatedAt: drawing.updatedAt,
        ...drawing.scene,
      });
    },
    async updateDrawing(request: RouteRequest) {
      try {
        const id = request.params?.id;
        if (!id) {
          throw new HttpError(400, "Missing drawing id");
        }
        const text = await request.text();
        const raw = parseJsonBody<Record<string, unknown>>(text);
        const hasTitle = Object.hasOwn(raw, "title");
        const hasScene =
          Object.hasOwn(raw, "elements") ||
          Object.hasOwn(raw, "appState") ||
          Object.hasOwn(raw, "files");
        if (!hasTitle && !hasScene) {
          throw new HttpError(400, "Nothing to update");
        }
        const scene = hasScene ? parseSceneText(text) : undefined;
        const updated = store.updateDrawing(id, {
          scene,
          title: hasTitle ? normalizeTitle(raw.title) : undefined,
        });
        if (!updated) {
          return json({ ok: false, error: "Drawing not found" }, { status: 404 });
        }
        return json({
          ok: true,
          drawing: {
            id: updated.id,
            title: updated.title,
            createdAt: updated.createdAt,
            updatedAt: updated.updatedAt,
          },
        });
      } catch (error) {
        return errorResponse(error);
      }
    },
    deleteDrawing(request: RouteRequest) {
      const id = request.params?.id;
      if (!id) {
        return json({ ok: false, error: "Missing drawing id" }, { status: 400 });
      }
      const { deleted, next } = store.deleteDrawing(id);
      if (!deleted) {
        return json({ ok: false, error: "Drawing not found" }, { status: 404 });
      }
      return json({ ok: true, nextId: next?.id ?? null });
    },
  };
 }
@@ -0,0 +1,16 @@
 import React from "react";
 import { createRoot } from "react-dom/client";
 import { App } from "./App";
 import "./styles.css";
 const root = document.getElementById("root");
 if (!root) {
  throw new Error("Root element not found");
 }
 createRoot(root).render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
 );
@@ -0,0 +1,49 @@
 import { afterEach, describe, expect, test } from "bun:test";
 import { mkdtempSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { createDrawingStore } from "./db";
 const cleanup: string[] = [];
 afterEach(() => {
  while (cleanup.length > 0) {
    const dir = cleanup.pop();
    if (dir) {
      rmSync(dir, { recursive: true, force: true });
    }
  }
 });
 function createTempStore() {
  const dir = mkdtempSync(join(tmpdir(), "excali-"));
  cleanup.push(dir);
  return createDrawingStore(join(dir, "test.sqlite"));
 }
 describe("drawing store", () => {
  test("creates, updates, lists, and deletes drawings", () => {
    const store = createTempStore();
    const created = store.createDrawing();
    expect(created.title).toBe("Untitled");
    expect(store.listDrawings()).toHaveLength(1);
    const updated = store.updateDrawing(created.id, {
      title: "Flow",
      scene: {
        elements: [{ id: "one" }],
        appState: { gridSize: 20 },
        files: {},
      },
    });
    expect(updated?.title).toBe("Flow");
    expect(updated?.scene.elements).toHaveLength(1);
    const removed = store.deleteDrawing(created.id);
    expect(removed.deleted).toBe(true);
    expect(store.listDrawings()).toHaveLength(1);
    expect(removed.next?.id).not.toBe(created.id);
  });
 });
@@ -0,0 +1,209 @@
 import { Database } from "bun:sqlite";
 import { randomUUID } from "node:crypto";
 import { mkdirSync } from "node:fs";
 import { dirname } from "node:path";
 import { DEFAULT_TITLE, type DrawingMeta, type DrawingRecord, type ScenePayload } from "./shared";
 import { coerceStoredScene, emptyScene, normalizeTitle } from "./scene";
 type DrawingRow = {
  id: string;
  title: string;
  data: string;
  createdAt: string;
  updatedAt: string;
 };
 type DrawingMetaRow = Omit<DrawingRow, "data">;
 export type DrawingStore = ReturnType<typeof createDrawingStore>;
 function createId(): string {
  return randomUUID().replaceAll("-", "").slice(0, 12);
 }
 function resolveDatabasePath(): string {
  if (process.env.DATABASE_PATH) {
    return process.env.DATABASE_PATH;
  }
  try {
    mkdirSync("/data", { recursive: true });
    return "/data/excalidraw.sqlite";
  } catch {
    return `${process.cwd()}/data/excalidraw.sqlite`;
  }
 }
 function readMeta(row: DrawingMetaRow | null | undefined): DrawingMeta | null {
  if (!row) {
    return null;
  }
  return {
    id: row.id,
    title: row.title,
    createdAt: row.createdAt,
    updatedAt: row.updatedAt,
  };
 }
 function readRow(row: DrawingRow | null | undefined): DrawingRecord | null {
  if (!row) {
    return null;
  }
  return {
    ...readMeta(row)!,
    scene: coerceStoredScene(JSON.parse(row.data)),
  };
 }
 export function createDrawingStore(databasePath = resolveDatabasePath()) {
  mkdirSync(dirname(databasePath), { recursive: true });
  const db = new Database(databasePath, { create: true, strict: true });
  db.exec(`
    PRAGMA journal_mode = WAL;
    CREATE TABLE IF NOT EXISTS drawings (
      id TEXT PRIMARY KEY,
      title TEXT NOT NULL,
      data TEXT NOT NULL,
      created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
      updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
    );
    CREATE INDEX IF NOT EXISTS drawings_updated_at_idx
    ON drawings(updated_at DESC, created_at DESC);
  `);
  const listQuery = db.query(`
    SELECT
      id,
      title,
      created_at AS createdAt,
      updated_at AS updatedAt
    FROM drawings
    ORDER BY updated_at DESC, created_at DESC
  `);
  const getQuery = db.query(`
    SELECT
      id,
      title,
      data,
      created_at AS createdAt,
      updated_at AS updatedAt
    FROM drawings
    WHERE id = ?1
  `);
  const createQuery = db.query(`
    INSERT INTO drawings (id, title, data)
    VALUES (?1, ?2, ?3)
  `);
  const updateSceneQuery = db.query(`
    UPDATE drawings
    SET data = ?2, updated_at = CURRENT_TIMESTAMP
    WHERE id = ?1
  `);
  const updateTitleQuery = db.query(`
    UPDATE drawings
    SET title = ?2, updated_at = CURRENT_TIMESTAMP
    WHERE id = ?1
  `);
  const updateBothQuery = db.query(`
    UPDATE drawings
    SET title = ?2, data = ?3, updated_at = CURRENT_TIMESTAMP
    WHERE id = ?1
  `);
  const deleteQuery = db.query(`
    DELETE FROM drawings
    WHERE id = ?1
  `);
  function listDrawings(): DrawingMeta[] {
    return (listQuery.all() as DrawingMetaRow[]).map((row) => readMeta(row)!);
  }
  function getDrawing(id: string): DrawingRecord | null {
    return readRow(getQuery.get(id) as DrawingRow | null | undefined);
  }
  function createDrawing(title = DEFAULT_TITLE): DrawingRecord {
    const id = createId();
    createQuery.run(id, normalizeTitle(title), JSON.stringify(emptyScene()));
    return getDrawing(id)!;
  }
  function getLatestDrawing(): DrawingMeta | null {
    return listDrawings()[0] ?? null;
  }
  function ensureInitialDrawing(): DrawingMeta {
    return getLatestDrawing() ?? createDrawing();
  }
  function updateDrawing(id: string, update: { scene?: ScenePayload; title?: string }): DrawingRecord | null {
    const existing = getDrawing(id);
    if (!existing) {
      return null;
    }
    const hasScene = update.scene !== undefined;
    const hasTitle = update.title !== undefined;
    if (!hasScene && !hasTitle) {
      return existing;
    }
    if (hasScene && hasTitle) {
      updateBothQuery.run(id, normalizeTitle(update.title), JSON.stringify(update.scene));
    } else if (hasScene) {
      updateSceneQuery.run(id, JSON.stringify(update.scene));
    } else {
      updateTitleQuery.run(id, normalizeTitle(update.title));
    }
    return getDrawing(id);
  }
  function deleteDrawing(id: string): { deleted: boolean; next: DrawingMeta | null } {
    const changes = Number(deleteQuery.run(id).changes);
    if (changes === 0) {
      return { deleted: false, next: null };
    }
    return {
      deleted: true,
      next: ensureInitialDrawing(),
    };
  }
  function close() {
    db.close(false);
  }
  return {
    databasePath,
    close,
    listDrawings,
    getDrawing,
    createDrawing,
    getLatestDrawing,
    ensureInitialDrawing,
    updateDrawing,
    deleteDrawing,
  };
 }
 let defaultStore: DrawingStore | null = null;
 export function getDefaultDrawingStore(): DrawingStore {
  defaultStore ??= createDrawingStore();
  return defaultStore;
 }
@@ -0,0 +1,12 @@
 <!doctype html>
 <html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>excali</title>
    <script type="module" src="./client.tsx"></script>
  </head>
  <body>
    <div id="root"></div>
  </body>
 </html>
@@ -0,0 +1,25 @@
 import { describe, expect, test } from "bun:test";
 import { HttpError, MAX_SCENE_BYTES, normalizeScene, parseJsonBody } from "./scene";
 describe("scene helpers", () => {
  test("normalizes volatile app state fields", () => {
    const scene = normalizeScene({
      elements: [],
      appState: {
        selectedElementIds: { one: true },
        viewModeEnabled: false,
      },
      files: {},
    });
    expect(scene.appState.selectedElementIds).toBeUndefined();
    expect(scene.appState.viewModeEnabled).toBe(false);
  });
  test("rejects oversized payloads", () => {
    const text = "x".repeat(MAX_SCENE_BYTES + 1);
    expect(() => parseJsonBody(text)).toThrow(HttpError);
    expect(() => parseJsonBody(text)).toThrow("Payload too large");
  });
 });
@@ -0,0 +1,97 @@
 import { DEFAULT_TITLE, type ScenePayload } from "./shared";
 export const MAX_SCENE_BYTES = 25 * 1024 * 1024;
 export class HttpError extends Error {
  constructor(
    readonly status: number,
    message: string,
  ) {
    super(message);
  }
 }
 const VOLATILE_APP_STATE_KEYS = new Set([
  "collaborators",
  "selectedElementIds",
  "selectedGroupIds",
  "editingElement",
  "editingLinearElement",
  "openMenu",
  "openSidebar",
  "contextMenu",
  "toast",
 ]);
 export function emptyScene(): ScenePayload {
  return {
    elements: [],
    appState: {},
    files: {},
  };
 }
 function isRecord(value: unknown): value is Record<string, unknown> {
  return typeof value === "object" && value !== null && !Array.isArray(value);
 }
 export function normalizeTitle(input: unknown): string {
  if (typeof input !== "string") {
    return DEFAULT_TITLE;
  }
  const trimmed = input.trim();
  return trimmed.length > 0 ? trimmed : DEFAULT_TITLE;
 }
 export function normalizeScene(input: unknown): ScenePayload {
  if (!isRecord(input)) {
    throw new HttpError(400, "Body must be an object");
  }
  if (!Array.isArray(input.elements)) {
    throw new HttpError(400, "elements must be an array");
  }
  if (!isRecord(input.appState)) {
    throw new HttpError(400, "appState must be an object");
  }
  if (!isRecord(input.files)) {
    throw new HttpError(400, "files must be an object");
  }
  const appState = Object.fromEntries(
    Object.entries(input.appState).filter(([key]) => !VOLATILE_APP_STATE_KEYS.has(key)),
  );
  return {
    elements: input.elements,
    appState,
    files: input.files,
  };
 }
 export function parseJsonBody<T = unknown>(text: string): T {
  if (new TextEncoder().encode(text).byteLength > MAX_SCENE_BYTES) {
    throw new HttpError(413, "Payload too large");
  }
  try {
    return JSON.parse(text) as T;
  } catch {
    throw new HttpError(400, "Invalid JSON");
  }
 }
 export function parseSceneText(text: string): ScenePayload {
  return normalizeScene(parseJsonBody(text));
 }
 export function coerceStoredScene(input: unknown): ScenePayload {
  try {
    return normalizeScene(input);
  } catch {
    return emptyScene();
  }
 }
@@ -0,0 +1,40 @@
 import index from "./index.html";
 import { createApi } from "./api";
 import { getDefaultDrawingStore } from "./db";
 export function createServer() {
  const drawingStore = getDefaultDrawingStore();
  const api = createApi(drawingStore);
  return {
    port: Number(process.env.PORT ?? "3000"),
    hostname: process.env.HOST ?? "0.0.0.0",
    routes: {
      "/": (request: Request) => {
        const drawing = drawingStore.ensureInitialDrawing();
        return Response.redirect(new URL(`/d/${drawing.id}`, request.url), 302);
      },
      "/d/:id": index,
      "/api/health": {
        GET: () => api.health(),
      },
      "/api/drawings": {
        GET: () => api.listDrawings(),
        POST: () => api.createDrawing(),
      },
      "/api/drawings/:id": {
        GET: (request: Request & { params: Record<string, string> }) => api.getDrawing(request),
        PUT: (request: Request & { params: Record<string, string> }) => api.updateDrawing(request),
        DELETE: (request: Request & { params: Record<string, string> }) => api.deleteDrawing(request),
      },
    },
    fetch() {
      return Response.json({ ok: false, error: "Not found" }, { status: 404 });
    },
  } satisfies Parameters<typeof Bun.serve>[0];
 }
 if (import.meta.main) {
  const server = Bun.serve(createServer());
  console.log(`Listening on http://${server.hostname}:${server.port}`);
 }
@@ -0,0 +1,18 @@
 export type ScenePayload = {
  elements: unknown[];
  appState: Record<string, unknown>;
  files: Record<string, unknown>;
 };
 export type DrawingMeta = {
  id: string;
  title: string;
  createdAt: string;
  updatedAt: string;
 };
 export type DrawingRecord = DrawingMeta & {
  scene: ScenePayload;
 };
 export const DEFAULT_TITLE = "Untitled";
@@ -0,0 +1,187 @@
 :root {
  color-scheme: light;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
 }
 * {
  box-sizing: border-box;
 }
 html,
 body,
 #root {
  margin: 0;
  height: 100%;
 }
 body {
  background: #f5f5f4;
  color: #18181b;
 }
 button,
 input {
  font: inherit;
 }
 .app-shell {
  display: flex;
  height: 100%;
 }
 .sidebar {
  display: flex;
  width: 260px;
  min-width: 260px;
  flex-direction: column;
  border-right: 1px solid #e4e4e7;
  background: #ffffff;
 }
 .sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #e4e4e7;
  padding: 16px;
 }
 .sidebar-header h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
 }
 .drawing-list {
  overflow: auto;
  padding: 8px;
 }
 .drawing-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 32px;
  align-items: center;
  gap: 8px;
  border-radius: 8px;
  padding: 4px;
 }
 .drawing-item-active {
  background: #f4f4f5;
 }
 .drawing-link {
  min-width: 0;
  border: 0;
  background: transparent;
  padding: 8px;
  text-align: left;
 }
 .drawing-title,
 .title-input {
  display: block;
  width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
 }
 .title-input {
  border: 1px solid #d4d4d8;
  border-radius: 6px;
  background: #ffffff;
  padding: 6px 8px;
 }
 .editor-shell {
  position: relative;
  min-width: 0;
  flex: 1;
 }
 .toolbar {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 8px;
 }
 .status-badge,
 .primary-button,
 .secondary-button,
 .icon-button {
  border: 1px solid #d4d4d8;
  border-radius: 8px;
  background: #ffffff;
 }
 .status-badge {
  padding: 8px 10px;
  font-size: 13px;
 }
 .status-saving {
  color: #1d4ed8;
 }
 .status-failed {
  color: #b91c1c;
 }
 .status-saved {
  color: #166534;
 }
 .primary-button,
 .secondary-button {
  cursor: pointer;
  padding: 8px 12px;
 }
 .secondary-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
 }
 .icon-button {
  width: 32px;
  height: 32px;
  cursor: pointer;
 }
 .editor-frame,
 .editor-loading {
  height: 100%;
 }
 .editor-loading {
  display: grid;
  place-items: center;
  color: #52525b;
 }
@media (max-width: 900px) {
  .sidebar {
    width: 220px;
    min-width: 220px;
  }
  .toolbar {
    left: 12px;
    right: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
 }
@@ -0,0 +1,20 @@
 {
  "compilerOptions": {
    "lib": ["ESNext", "DOM", "DOM.Iterable"],
    "target": "ESNext",
    "module": "Preserve",
    "moduleDetection": "force",
    "jsx": "react-jsx",
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "verbatimModuleSyntax": true,
    "noEmit": true,
    "strict": true,
    "skipLibCheck": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitOverride": true,
    "types": ["bun-types"]
  },
  "include": ["src/**/*"]
 }