\n \n \n \n",[],[300,310],"040d8fe2-5acb-11f0-a3bc-f69ea79377d9","favicon.svg","ebf5fedc-7cbe-4f04-bd86-069b166e11fb",["D",1751848844056],"",[],[300,318],"b2f8eaec-5acb-11f0-9758-f69ea79377d9","246aef39-75c5-42bb-b778-7be36e72c312",15,["D",1751849137589],"# Frontend\n\nThis is a client-side React app for the 4x4 Grid Visual Editor.\n\n## `index.html`\n\nThe **entrypoint** for the frontend is `/frontend/index.html`. This is the HTML page that is returned at the root from `/backend/index.ts`.\n\nThis HTML file imports `/frontend/style.css` from `/public/style.css` and `/frontend/favicon.svg` from `/frontend/favicon.svg`. Everything in `/frontend/` is mapped to `/public` by `/backend/index.ts`. This is just a convention. You could import & serve everything out of the same folder name.\n\nThis HTML file has a `

`, which is where we mount the React app.\n\nThis HTML file imports `/frontend/index.tsx` from `/public/index.tsx`, which is the **entrypoint** for all frontend JavaScript, including all the React. It is not a problem that it imports a file with a `.tsx` extension because browsers ignore file extensions. They only pay attention to content-types, which is great, because all these files will be returned as transpiled JS with the appropriate JS content type by [stevekrouse/utils/serve-public](https://www.val.town/x/stevekrouse/utils/branch/main/code/serve-public/README.md).\n\n## `index.tsx`\n\nThis file is the **entrypoint** for frontend JavaScript. It imports the React app from `/frontend/components/App.tsx` and mounts it on `

`.\n\nIt also looks for *bootstrapped* JSON data at `window.__INITIAL_DATA`, and passes that to the ``.\n\n## `favicon.svg`\n\nAs of this writing Val Town only supports text files, which is why the favicon is an SVG and not an .ico or any other binary image format. If you need binary file storage, check out [Blob Storage](https://docs.val.town/std/blob/).\n\n## `components/`\n\nThis directory contains the React components:\n\n- `App.tsx` - Main app component with tab navigation\n- `GridEditor.tsx` - Interactive 4x4 grid editor with save functionality\n- `SavedGridsView.tsx` - Read-only view of all saved grids\n\n## Features\n\n- **Interactive Grid**: Click cells to toggle between black and white\n- **Real-time Text Output**: Shows the textual representation as you edit\n- **Save Once**: Grids can only be saved once to prevent duplicates\n- **Copy to Clipboard**: Easy copying of text representations\n- **Responsive Design**: Works on mobile and desktop",[],[300,90],"587fdaa8-5acb-11f0-8c87-f69ea79377d9","SavedGridsView.tsx","587fdb66-5acb-11f0-8c87-f69ea79377d9","f72c8ed8-c3ba-4723-955f-b9d23f7104ca",8,["D",1751848985802],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport React from \"https://esm.sh/react@18.2.0\";\nimport { type Grid, GRID_SIZE, gridToText } from \"../../shared/utils.ts\";\n\ninterface SavedGridsViewProps {\n grids: Grid[];\n}\n\nexport function SavedGridsView({ grids }: SavedGridsViewProps) {\n if (grids.length === 0) {\n return (\n

No saved grids yet. Create and save a grid in the Editor tab!

\n );\n }\n\n return (\n

Saved Grids ({grids.length})

\n {grids.map((grid) => (\n \n ))}\n

\n );\n}\n\nfunction SavedGridItem({ grid }: { grid: Grid }) {\n const formattedDate = new Date(grid.timestamp).toLocaleString();\n const textRepresentation = gridToText(grid.cells);\n\n return (\n

\n Saved: {formattedDate}\n

\n \n

\n {grid.cells.map((isBlack, index) => (\n \n ))}\n

\n\n

\n {textRepresentation}\n \n

\n );\n}",[],[300,340,332],"components","50062256-5acb-11f0-ba5c-f69ea79377d9","GridEditor.tsx","50062346-5acb-11f0-ba5c-f69ea79377d9",7,["D",1751848971585],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport React from \"https://esm.sh/react@18.2.0\";\nimport { type Grid, GRID_SIZE, createEmptyGrid, gridToText } from \"../../shared/utils.ts\";\n\ninterface GridEditorProps {\n onGridSaved: () => void;\n}\n\nexport function GridEditor({ onGridSaved }: GridEditorProps) {\n const [cells, setCells] = React.useState(createEmptyGrid());\n const [gridId] = React.useState(() => crypto.randomUUID());\n const [isSaved, setIsSaved] = React.useState(false);\n const [isSaving, setIsSaving] = React.useState(false);\n\n const toggleCell = (index: number) => {\n if (isSaved) return; // Don't allow editing saved grids\n \n setCells(prev => {\n const newCells = [...prev];\n newCells[index] = !newCells[index];\n return newCells;\n });\n };\n\n const resetGrid = () => {\n if (isSaved) return;\n setCells(createEmptyGrid());\n };\n\n const saveGrid = async () => {\n if (isSaved || isSaving) return;\n\n setIsSaving(true);\n try {\n const grid: Grid = {\n id: gridId,\n cells,\n timestamp: new Date().toISOString(),\n saved: false\n };\n\n const response = await fetch(\"/grids\", {\n method: \"POST\",\n headers: {\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify(grid),\n });\n\n if (response.ok) {\n setIsSaved(true);\n onGridSaved();\n } else {\n const error = await response.json();\n alert(`Failed to save grid: ${error.error}`);\n }\n } catch (error) {\n console.error(\"Failed to save grid\", error);\n alert(\"Failed to save grid\");\n } finally {\n setIsSaving(false);\n }\n };\n\n const textRepresentation = gridToText(cells);\n\n return (\n

\n {cells.map((isBlack, index) => (\n toggleCell(index)}\n title={`Cell ${index} - Click to ${isBlack ? 'make white' : 'make black'}`}\n />\n ))}\n

\n\n

\n \n \n

\n\n

Text Representation:

\n {textRepresentation}\n \n

\n\n {isSaved && (\n

\n ✅ Grid saved! This grid can no longer be edited.\n

\n )}\n

\n );\n}",[],[300,340,342],"469a7d70-5acb-11f0-8d6d-f69ea79377d9","App.tsx","c51574f8-fdb9-460a-91fa-36e75158900c",6,["D",1751848955763],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport React from \"https://esm.sh/react@18.2.0\";\nimport { type Grid, GRID_SIZE, createEmptyGrid, gridToText } from \"../../shared/utils.ts\";\nimport { GridEditor } from \"./GridEditor.tsx\";\nimport { SavedGridsView } from \"./SavedGridsView.tsx\";\n\nexport function App(\n { savedGrids = [], thisProjectURL }: { savedGrids?: Grid[]; thisProjectURL?: string },\n) {\n const [currentTab, setCurrentTab] = React.useState<'editor' | 'saved'>('editor');\n const [grids, setGrids] = React.useState(savedGrids);\n\n const fetchSavedGrids = async () => {\n try {\n const response = await fetch(\"/grids\");\n const data = await response.json();\n setGrids(data);\n } catch (error) {\n console.error(\"Failed to fetch saved grids\", error);\n }\n };\n\n return (\n

🎨 4x4 Grid Editor

\n \n

\n \n \n

\n\n

\n {currentTab === 'editor' ? (\n \n ) : (\n \n )}\n

\n\n {thisProjectURL && (\n \n )}\n

\n );\n}",[],[300,340,350],"040d8aba-5acb-11f0-a3bc-f69ea79377d9",["D",1751848844056],[251,252,253],[300,340],"040d9668-5acb-11f0-a3bc-f69ea79377d9",["D",1751848844056],[250,254,255,256,257,258],[300],"394e49d0-5acb-11f0-a8e1-f69ea79377d9","index.ts","f7a1ab55-c2ca-4b4f-a54f-ec57c03ce174",4,["D",1751848933465],"http","import { parseProject, readFile, serveFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { getSavedGrids, saveGrid } from \"./database/queries.ts\";\n\nconst app = new Hono();\n\n// Serve index.html at the root /\napp.get(\"/\", async c => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n\n // Bootstrap the initial saved grids data into index.html\n // To avoid an extra request and loading flash\n const savedGrids = await getSavedGrids();\n\n // Get this project's URL, in a way that works across forks and branches\n const projectVal = parseProject(import.meta.url);\n const thisProjectURL = projectVal.links.self.project;\n\n // Inject the data as a global variable inside a script tag\n const dataScript = ``;\n\n // Insert the script right before the closing tag\n html = html.replace(\"\", `${dataScript}`);\n\n return c.html(html);\n});\n\n// Serve all /frontend files under /public\napp.get(\"/public/**/*\", c => serveFile(c.req.path.replace(\"/public\", \"/frontend\"), import.meta.url));\n\n// Serve all /shared files under /shared\napp.get(\"/shared/**/*\", c => serveFile(c.req.path, import.meta.url));\n\n// Provide an endpoint for the frontend to get saved grids as JSON\napp.get(\"/grids\", async (c) => {\n const grids = await getSavedGrids();\n return c.json(grids);\n});\n\n// Provide an endpoint for the frontend to save a new grid\napp.post(\"/grids\", async (c) => {\n try {\n const grid = await c.req.json();\n\n if (!grid || !grid.id || !Array.isArray(grid.cells) || grid.cells.length !== 16) {\n return c.json({ error: \"Invalid grid data\" }, 400);\n }\n\n await saveGrid(grid);\n return c.json({ success: true }, 201);\n } catch (error) {\n if (error.message === \"Grid has already been saved\") {\n return c.json({ error: error.message }, 409);\n }\n throw error;\n }\n});\n\n// Unwrap and rethrow Hono errors as the original error\n// If you delete this, all errors will be \"Internal Server Error\"\napp.onError((err, c) => {\n throw err;\n});\n\n// HTTP vals expect an exported \"fetch handler\"\n// This is how you \"run the server\" in Val Town with Hono\nexport default app.fetch;",[],[215,366],"2ee5040c-cc81-11f0-90e6-42dde27851f2","getgrids.ts",["D",1764351565800],"import { getSavedGrids } from \"./database/queries.ts\";\nimport { blob } from \"https://esm.town/v/std/blob\";\n\n\n\nconst savedGrids = await blob.getJSON(\"savedGrids\");\n\n const gridWhitesCount = grid => grid.cells.filter(x => x === false).length;\n const templateA = savedGrids.filter(x => gridWhitesCount(x) === 10)[0]\n\n\n\n\nexport default async function(request: Request) {\n return new Response(JSON.stringify(savedGrids))\n}",[],[215,375],"9c7be148-5acb-11f0-8a2d-f69ea79377d9","9d4b149e-2007-4d2e-bae8-882b807d1e36",13,["D",1751849099864],"# Backend\n\nThis folder contains all backend-only code in this project. It's broken up into:\n\n* `index.ts` - this is the **entrypoint** for this whole project\n* `database/` - this contains the code for interfacing with Val Town's blob storage\n\n## Hono\n\nThis app uses [Hono](https://hono.dev/) as the API framework. You can think of Hono as a replacement for [ExpressJS](https://expressjs.com/) that works in serverless environments like Val Town or Cloudflare Workers. If you come from Python or Ruby, Hono is also a lot like [Flask](https://github.com/pallets/flask) or [Sinatra](https://github.com/sinatra/sinatra), respectively.\n\n## Serving assets to the frontend\n\nThis backend HTTP server is responsible for serving all static assets to the browser to render the app, including HTML, JavaScript (including all client-side React), CSS, and even the favicon SVG.\n\nIn a normal server environment, you would likely use a middleware [like this one](https://hono.dev/docs/getting-started/nodejs#serve-static-files) to serve static files. Some frameworks or deployment platforms automatically make any content inside a `public/` folder public. \n\nHowever in Val Town you need to handle this yourself, and it can be suprisingly difficult to read and serve files in a Val Town Project. This template uses helper functions from [stevekrouse/utils/serve-public](https://www.val.town/x/stevekrouse/utils/branch/main/code/serve-public/README.md), which handle reading project files in a way that will work across branches and forks, automatically transpiles typescript to javascript, and assigns content-types based on the file's extension.\n\n### `index.html`\n\nThe most complicated part of this backend API is serving index.html. In this app (like most apps) we serve it at the root, ie `GET /`. \n\nWe *bootstrap* `index.html` with some initial data from the server, so that it gets dynamically injected JSON data without having to make another round-trip request to the server to get that data on the frontend. This is a common pattern for client-side rendered apps.\n\n## CRUD API Routes\n\nThis app has two CRUD API routes: for reading and saving grids. They both speak JSON, which is standard. They import their functions from `/backend/database/queries.ts`. These routes are called from the React app to refresh and update data.\n\n## Storage\n\nInstead of SQLite, this app uses Val Town's blob storage to persist saved grids. This is simpler for this use case and doesn't require database migrations.\n\n## Errors\n\nHono and other API frameworks have a habit of swallowing up Errors. We turn off this default behavior by re-throwing errors, because we think most of the time you'll want to see the full stack trace instead of merely \"Internal Server Error\". You can customize how you want errors to appear.",[],[215,90],["D",1751849175816],[],[215,120,95],["D",1751848844056],[],[215,120,78],["D",1751849118526],[],[215,120,90],["D",1751848844056],[243,244,245],[215,120],"040d85ec-5acb-11f0-a3bc-f69ea79377d9",["D",1751848844056],[242,246,247,248],[215],["D",1751848844056],{"_11":12,"_173":84},{"_11":12,"_168":169,"_83":84,"_31":82,"_170":171,"_172":30},{"_42":156,"_13":16,"_36":39,"_157":123,"_158":73,"_159":160,"_161":127,"_162":163,"_164":165,"_166":14,"_167":12},"ctx",{"_55":-5,"_194":440,"_441":442,"_443":444,"_445":30,"_446":30,"_447":30,"_448":24,"_449":-5,"_450":-7,"_451":-7,"_452":26,"_453":30,"_454":30,"_455":-5,"_456":30,"_457":30,"_458":30,"_459":-5},"ENV",{"_411":412,"_413":414,"_415":16,"_416":417,"_418":419,"_420":421,"_422":423,"_424":425,"_426":427,"_428":429,"_430":431,"_432":433,"_434":435,"_436":437,"_438":439},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

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