Hi

\",\n});\n```\n\n## Val Town Utility Functions\n\nVal Town provides several utility functions to help with common project tasks.\n\n### Importing Utilities\n\nAlways import utilities with version pins to avoid breaking changes:\n\n```ts\nimport {\n parseProject,\n readFile,\n serveFile,\n} from \"https://esm.town/v/std/utils@85-main/index.ts\";\n```\n\n### Available Utilities\n\n#### **serveFile** - Serve project files with proper content types\n\nFor example, in Hono:\n\n```ts\n// serve all files in frontend/ and shared/\napp.get(\"/frontend/*\", (c) => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", (c) => serveFile(c.req.path, import.meta.url));\n```\n\n#### **readFile** - Read files from within the project:\n\n```ts\n// Read a file from the project\nconst fileContent = await readFile(\"/frontend/index.html\", import.meta.url);\n```\n\n#### **listFiles** - List all files in the project\n\n```ts\nconst files = await listFiles(import.meta.url);\n```\n\n#### **parseProject** - Extract information about the current project from import.meta.url\n\nThis is useful for including info for linking back to a val, ie in \"view source\"\nurls:\n\n```ts\nconst projectVal = parseProject(import.meta.url);\nconsole.log(projectVal.username); // Owner of the project\nconsole.log(projectVal.name); // Project name\nconsole.log(projectVal.version); // Version number\nconsole.log(projectVal.branch); // Branch name\nconsole.log(projectVal.links.self.project); // URL to the project page\n```\n\nHowever, it's _extremely importing_ to note that `parseProject` and other\nStandard Library utilities ONLY RUN ON THE SERVER. If you need access to this\ndata on the client, run it in the server and pass it to the client by splicing\nit into the HTML page or by making an API request for it.\n\n## Val Town Platform Specifics\n\n- **Redirects:** Use\n `return new Response(null, { status: 302, headers: { Location: \"/place/to/redirect\" }})`\n instead of `Response.redirect` which is broken\n- **Images:** Avoid external images or base64 images. Use emojis, unicode\n symbols, or icon fonts/libraries instead\n- **AI Image:** To inline generate an AI image use:\n `

`\n- **Storage:** DO NOT use the Deno KV module for storage\n- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods\n- **Weather Data:** Use open-meteo for weather data (doesn't require API keys)\n unless otherwise specified\n- **View Source:** Add a view source link by importing & using\n `import.meta.url.replace(\"ems.sh\", \"val.town)\"` (or passing this data to the\n client) and include `target=\"_top\"` attribute\n- **Error Debugging:** Add\n `` to HTML to capture\n client-side errors\n- **Error Handling:** Only use try...catch when there's a clear local\n resolution; Avoid catches that merely log or return 500s. Let errors bubble up\n with full context\n- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but\n generally prefer APIs that don't require keys\n- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure\n compatibility on server and browser\n- **Storage Strategy:** Only use backend storage if explicitly required; prefer\n simple static client-side sites\n- **React Configuration:** When using React libraries, pin versions with\n `?deps=react@18.2.0,react-dom@18.2.0` and start the file with\n `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- Ensure all React dependencies and sub-dependencies are pinned to the same\n version\n- **Styling:** Default to using TailwindCSS via\n `` unless otherwise\n specified\n\n## Project Structure and Design Patterns\n\n### Recommended Directory Structure\n\n```\n├── backend/\n│ ├── database/\n│ │ ├── migrations.ts # Schema definitions\n│ │ ├── queries.ts # DB query functions\n│ │ └── README.md\n│ └── routes/ # Route modules\n│ ├── [route].ts\n│ └── static.ts # Static file serving\n│ ├── index.ts # Main entry point\n│ └── README.md\n├── frontend/\n│ ├── components/\n│ │ ├── App.tsx\n│ │ └── [Component].tsx\n│ ├── favicon.svg\n│ ├── index.html # Main HTML template\n│ ├── index.tsx # Frontend JS entry point\n│ ├── README.md\n│ └── style.css\n├── README.md\n└── shared/\n ├── README.md\n └── utils.ts # Shared types and functions\n```\n\n### Backend (Hono) Best Practices\n\n- Hono is the recommended API framework\n- Main entry point should be `backend/index.ts`\n- **Static asset serving:** Use the utility functions to read and serve project\n files:\n ```ts\n import {\n readFile,\n serveFile,\n } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n\n // serve all files in frontend/ and shared/\n app.get(\"/frontend/*\", (c) => serveFile(c.req.path, import.meta.url));\n app.get(\"/shared/*\", (c) => serveFile(c.req.path, import.meta.url));\n\n // For index.html, often you'll want to bootstrap with initial data\n app.get(\"/\", async (c) => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n\n // Inject data to avoid extra round-trips\n const initialData = await fetchInitialData();\n const dataScript = ``;\n\n html = html.replace(\"\", `${dataScript}`);\n return c.html(html);\n });\n ```\n- Create RESTful API routes for CRUD operations\n- Always include this snippet at the top-level Hono app to re-throwing errors to\n see full stack traces:\n ```ts\n // Unwrap Hono errors to see original error details\n app.onError((err, c) => {\n throw err;\n });\n ```\n\n### Database Patterns\n\n- Run migrations on startup or comment out for performance\n- Change table names when modifying schemas rather than altering\n- Export clear query functions with proper TypeScript typing\n\n## Common Gotchas and Solutions\n\n1. **Environment Limitations:**\n - Val Town runs on Deno in a serverless context, not Node.js\n - Code in `shared/` must work in both frontend and backend environments\n - Cannot use `Deno` keyword in shared code\n - Use `https://esm.sh` for imports that work in both environments\n\n2. **SQLite Peculiarities:**\n - Limited support for ALTER TABLE operations\n - Create new tables with updated schemas and copy data when needed\n - Always run table creation before querying\n\n3. **React Configuration:**\n - All React dependencies must be pinned to 18.2.0\n - Always include `@jsxImportSource https://esm.sh/react@18.2.0` at the top of\n React files\n - Rendering issues often come from mismatched React versions\n\n4. **File Handling:**\n - Val Town only supports text files, not binary\n - Use the provided utilities to read files across branches and forks\n - For files in the project, use `readFile` helpers\n\n5. **API Design:**\n - `fetch` handler is the entry point for HTTP vals\n - Run the Hono app with\n `export default app.fetch // This is the entry point for HTTP vals`",[157],"3e30d87e-c703-11f0-8f96-42dde27851f2",".vtignore","3e30d914-c703-11f0-8f96-42dde27851f2",18,["D",1763747719052],".git\n.vscode\n.cursor\n.DS_Store\nnode_modules\nvendor",[164],"3da38848-c703-11f0-87ea-42dde27851f2","shared","3da38924-c703-11f0-87ea-42dde27851f2",3,["D",1763747718127],[171],"3d707e26-c703-11f0-87ea-42dde27851f2","frontend","3d707f5c-c703-11f0-87ea-42dde27851f2",1,["D",1763747717802],[177],"3d8e0fae-c703-11f0-b892-42dde27851f2","backend","3d8e1076-c703-11f0-b892-42dde27851f2",2,["D",1763747717998],[183],"pulls","branches","forks","envVars",{"_195":61,"_197":61},"connections",{"_195":61,"_196":61},"count","unfilledCount","emptyCount",{"_41":182,"_31":183,"_29":184,"_135":-5,"_39":40,"_38":185,"_137":57,"_36":330,"_13":61,"_33":34,"_35":-5,"_23":24,"_140":-5,"_219":331,"_26":332},{"_41":325,"_31":316,"_29":310,"_135":184,"_39":40,"_38":326,"_137":57,"_36":327,"_13":61,"_33":34,"_35":-5,"_23":24,"_140":-5,"_219":328,"_26":329},{"_41":317,"_31":318,"_29":319,"_135":310,"_39":40,"_38":320,"_137":24,"_36":321,"_13":61,"_33":239,"_35":322,"_23":24,"_140":-5,"_219":323,"_26":324},{"_41":307,"_31":308,"_29":309,"_135":310,"_39":40,"_38":311,"_137":24,"_36":312,"_13":61,"_33":239,"_35":313,"_23":24,"_140":-5,"_219":314,"_26":315},{"_41":300,"_31":301,"_29":302,"_135":184,"_39":40,"_38":303,"_137":57,"_36":304,"_13":61,"_33":34,"_35":-5,"_23":24,"_140":-5,"_219":305,"_26":306},{"_41":296,"_31":32,"_29":30,"_135":184,"_39":40,"_38":14,"_137":57,"_36":297,"_13":61,"_33":34,"_35":-5,"_23":24,"_140":-5,"_219":298,"_26":299},{"_41":288,"_31":289,"_29":55,"_135":184,"_39":40,"_38":290,"_137":24,"_36":291,"_13":179,"_33":292,"_35":293,"_23":24,"_140":-5,"_219":294,"_26":295},{"_41":176,"_31":177,"_29":178,"_135":-5,"_39":40,"_38":179,"_137":57,"_36":285,"_13":61,"_33":34,"_35":-5,"_23":24,"_140":-5,"_219":286,"_26":287},{"_41":280,"_31":279,"_29":273,"_135":178,"_39":40,"_38":281,"_137":57,"_36":282,"_13":61,"_33":34,"_35":-5,"_23":24,"_140":-5,"_219":283,"_26":284},{"_41":270,"_31":271,"_29":272,"_135":273,"_39":40,"_38":274,"_137":24,"_36":275,"_13":61,"_33":239,"_35":276,"_23":24,"_140":-5,"_219":277,"_26":278},{"_41":262,"_31":263,"_29":264,"_135":178,"_39":40,"_38":265,"_137":57,"_36":266,"_13":61,"_33":20,"_35":267,"_23":24,"_140":-5,"_219":268,"_26":269},{"_41":254,"_31":255,"_29":256,"_135":178,"_39":40,"_38":257,"_137":24,"_36":258,"_13":61,"_33":239,"_35":259,"_23":24,"_140":-5,"_219":260,"_26":261},{"_41":246,"_31":247,"_29":248,"_135":178,"_39":40,"_38":249,"_137":24,"_36":250,"_13":61,"_33":20,"_35":251,"_23":24,"_140":-5,"_219":252,"_26":253},{"_41":170,"_31":171,"_29":172,"_135":-5,"_39":40,"_38":173,"_137":57,"_36":243,"_13":61,"_33":34,"_35":-5,"_23":24,"_140":-5,"_219":244,"_26":245},{"_41":234,"_31":235,"_29":236,"_135":172,"_39":40,"_38":237,"_137":24,"_36":238,"_13":61,"_33":239,"_35":240,"_23":24,"_140":-5,"_219":241,"_26":242},{"_41":163,"_31":164,"_29":165,"_135":-5,"_39":40,"_38":166,"_137":57,"_36":231,"_13":61,"_33":20,"_35":168,"_23":24,"_140":-5,"_219":232,"_26":233},{"_41":156,"_31":157,"_29":158,"_135":-5,"_39":40,"_38":159,"_137":57,"_36":228,"_13":61,"_33":20,"_35":161,"_23":24,"_140":-5,"_219":229,"_26":230},{"_41":149,"_31":150,"_29":151,"_135":-5,"_39":40,"_38":152,"_137":57,"_36":225,"_13":61,"_33":20,"_35":154,"_23":24,"_140":-5,"_219":226,"_26":227},{"_41":142,"_31":143,"_29":144,"_135":-5,"_39":40,"_38":145,"_137":57,"_36":222,"_13":61,"_33":20,"_35":147,"_23":24,"_140":-5,"_219":223,"_26":224},{"_41":132,"_31":133,"_29":134,"_135":-5,"_39":40,"_38":136,"_137":57,"_36":218,"_13":61,"_33":20,"_35":139,"_23":24,"_140":-5,"_219":220,"_26":221},["D",1763747718724],"children",[],[133],["D",1763747719008],[],[143],["D",1763747718939],[],[150],["D",1763747718972],[],[157],["D",1763747719052],[],[164],"3e168938-c703-11f0-8f96-42dde27851f2","types.ts","3e1689ec-c703-11f0-8f96-42dde27851f2",13,["D",1763747718889],"script","export interface Course {\n id?: number;\n title: string;\n instructor: string;\n status: 'Not Started' | 'In Progress' | 'Completed';\n link?: string;\n notes?: string;\n createdAt?: string;\n}\n",[],[171,235],["D",1763747718127],[212],[171],"3e0a12e8-c703-11f0-87ea-42dde27851f2","style.css","3e0a13c4-c703-11f0-87ea-42dde27851f2",11,["D",1763747718774],"body {\n background-color: #f3f4f6;\n}\n",[],[177,247],"3e03a156-c703-11f0-b892-42dde27851f2","index.tsx","3e03a21e-c703-11f0-b892-42dde27851f2",10,["D",1763747718696],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { createRoot } from \"https://esm.sh/react-dom@18.2.0/client\";\nimport App from \"./components/App.tsx\";\n\nconst root = createRoot(document.getElementById(\"root\")!);\nroot.render();\n",[],[177,255],"3df84590-c703-11f0-98f8-42dde27851f2","index.html","3df84644-c703-11f0-98f8-42dde27851f2",7,["D",1763747718695],"\n\n\n \n \n Course Tracker\n \n \n \n\n\n

\n \n\n\n",[],[177,263],"3dfae49e-c703-11f0-87ea-42dde27851f2","App.tsx","3dfae57a-c703-11f0-87ea-42dde27851f2","3dbd1a10-c703-11f0-b99b-42dde27851f2",8,["D",1763747718698],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useState, useEffect } from \"https://esm.sh/react@18.2.0\";\nimport { Course } from \"../../shared/types.ts\";\n\nexport default function App() {\n const [courses, setCourses] = useState([]);\n const [loading, setLoading] = useState(true);\n const [newCourse, setNewCourse] = useState>({\n title: \"\",\n instructor: \"\",\n status: \"Not Started\",\n link: \"\",\n notes: \"\"\n });\n\n useEffect(() => {\n fetchCourses();\n }, []);\n\n const fetchCourses = async () => {\n try {\n const res = await fetch(\"/api/courses\");\n const data = await res.json();\n setCourses(data);\n } catch (error) {\n console.error(\"Failed to fetch courses\", error);\n } finally {\n setLoading(false);\n }\n };\n\n const handleAddCourse = async (e: React.FormEvent) => {\n e.preventDefault();\n if (!newCourse.title) return;\n\n try {\n await fetch(\"/api/courses\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify(newCourse)\n });\n setNewCourse({\n title: \"\",\n instructor: \"\",\n status: \"Not Started\",\n link: \"\",\n notes: \"\"\n });\n fetchCourses();\n } catch (error) {\n console.error(\"Failed to add course\", error);\n }\n };\n\n const handleDelete = async (id: number) => {\n if (!confirm(\"Are you sure you want to delete this course?\")) return;\n try {\n await fetch(`/api/courses/${id}`, { method: \"DELETE\" });\n fetchCourses();\n } catch (error) {\n console.error(\"Failed to delete course\", error);\n }\n };\n\n const handleStatusChange = async (course: Course, newStatus: Course['status']) => {\n try {\n await fetch(`/api/courses/${course.id}`, {\n method: \"PUT\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ ...course, status: newStatus })\n });\n fetchCourses();\n } catch (error) {\n console.error(\"Failed to update status\", error);\n }\n };\n\n if (loading) return

;\n\n return (\n

Course Tracker

\n \n

Add New Course

\n\n

\n {courses.map(course => (\n

{course.title}

{course.instructor}

\n {course.link && (\n \n View Course\n \n )}\n {course.notes &&

{course.notes}

}\n

\n handleStatusChange(course, e.target.value as any)}\n >\n \n \n \n \n handleDelete(course.id!)}\n className=\"text-red-500 hover:text-red-700 p-1\"\n title=\"Delete\"\n >\n 🗑️\n \n

\n ))}\n {courses.length === 0 && (\n

No courses added yet.

\n )}\n

\n );\n}\n",[],[177,279,271],"components","3dbd1952-c703-11f0-b99b-42dde27851f2",4,["D",1763747718306],[207],[177,279],["D",1763747717802],[206,208,209,210],[177],"4a2218a0-c703-11f0-9513-42dde27851f2","index.ts",20,["D",1763747739078],"http","import { Hono } from \"npm:hono\";\nimport { serveFile, readFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\nimport { migrate } from \"./database/migrations.ts\";\nimport { getCourses, addCourse, updateCourse, deleteCourse } from \"./database/queries.ts\";\nimport { Course } from \"../shared/types.ts\";\n\nconst app = new Hono();\n\n// Initialize DB\nawait migrate();\n\napp.use(\"*\", async (c, next) => {\n try {\n await next();\n } catch (err) {\n console.error(err);\n return c.json({ error: err.message }, 500);\n }\n});\n\n// API Routes\napp.get(\"/api/courses\", async (c) => {\n const courses = await getCourses();\n return c.json(courses);\n});\n\napp.post(\"/api/courses\", async (c) => {\n const course = await c.req.json();\n await addCourse(course);\n return c.json({ success: true }, 201);\n});\n\napp.put(\"/api/courses/:id\", async (c) => {\n const id = parseInt(c.req.param(\"id\"));\n const course = await c.req.json();\n await updateCourse(id, course);\n return c.json({ success: true });\n});\n\napp.delete(\"/api/courses/:id\", async (c) => {\n const id = parseInt(c.req.param(\"id\"));\n await deleteCourse(id);\n return c.json({ success: true });\n});\n\n// Static files\napp.get(\"/frontend/*\", (c) => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", (c) => serveFile(c.req.path, import.meta.url));\n\n// Serve index.html\napp.get(\"/\", async (c) => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n // Optional: Inject initial data here if needed\n return c.html(html);\n});\n\nexport default app.fetch;\n",[],[183,289],"f6a6820a-c703-11f0-88dd-42dde27851f2",["D",1763748028533],[],[183,32],"3de45814-c703-11f0-87ea-42dde27851f2","routes","3de458d2-c703-11f0-87ea-42dde27851f2",6,["D",1763747718562],[],[183,301],"3e0e813e-c703-11f0-8f96-42dde27851f2","queries.ts","3e0e8224-c703-11f0-8f96-42dde27851f2","3dd0bb24-c703-11f0-87ea-42dde27851f2",12,["D",1763747718826],"import { sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\nimport { TABLE_NAME } from \"./migrations.ts\";\nimport { Course } from \"../../shared/types.ts\";\n\nexport async function getCourses(): Promise {\n const result = await sqlite.execute(`SELECT * FROM ${TABLE_NAME} ORDER BY created_at DESC`);\n return result.rows.map(row => ({\n id: row.id as number,\n title: row.title as string,\n instructor: row.instructor as string,\n status: row.status as 'Not Started' | 'In Progress' | 'Completed',\n link: row.link as string | undefined,\n notes: row.notes as string | undefined,\n createdAt: row.created_at as string\n }));\n}\n\nexport async function addCourse(course: Course): Promise {\n await sqlite.execute(\n `INSERT INTO ${TABLE_NAME} (title, instructor, status, link, notes) VALUES (?, ?, ?, ?, ?)`,\n [course.title, course.instructor, course.status, course.link, course.notes]\n );\n}\n\nexport async function updateCourse(id: number, course: Partial): Promise {\n // Dynamic update query building would be better, but for simplicity:\n // We'll just update fields that are present. \n // Ideally we'd have a more robust query builder or full update.\n // For this MVP, let's assume we update the status mainly or all fields.\n \n await sqlite.execute(\n `UPDATE ${TABLE_NAME} SET title = ?, instructor = ?, status = ?, link = ?, notes = ? WHERE id = ?`,\n [course.title, course.instructor, course.status, course.link, course.notes, id]\n );\n}\n\nexport async function deleteCourse(id: number): Promise {\n await sqlite.execute(`DELETE FROM ${TABLE_NAME} WHERE id = ?`, [id]);\n}\n",[],[183,316,308],"database","3e1ab6ac-c703-11f0-b99b-42dde27851f2","migrations.ts","3e1ab756-c703-11f0-b99b-42dde27851f2",14,["D",1763747718908],"import { sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\n\n// Change table name when schema changes\nconst TABLE_NAME = \"courses_v1\";\n\nexport async function migrate() {\n await sqlite.execute(`\n CREATE TABLE IF NOT EXISTS ${TABLE_NAME} (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n title TEXT NOT NULL,\n instructor TEXT,\n status TEXT DEFAULT 'Not Started',\n link TEXT,\n notes TEXT,\n created_at DATETIME DEFAULT CURRENT_TIMESTAMP\n )\n `);\n console.log(`Migrated table ${TABLE_NAME}`);\n}\n\nexport { TABLE_NAME };\n",[],[183,316,318],"3dd0ba2a-c703-11f0-87ea-42dde27851f2",5,["D",1763747718432],[200,201],[183,316],["D",1763747717998],[199,202,203,204],[183],["D",1763745760814],{"_95":94,"_102":98},{"_95":94,"_96":-5,"_97":98,"_18":53,"_99":100,"_101":24},{"_13":84,"_31":85,"_41":40,"_86":42,"_87":-5,"_88":-5,"_89":-5,"_90":-5,"_91":-5,"_92":43,"_93":94},"ctx",{"_77":-5,"_121":370,"_371":372,"_373":374,"_375":24,"_376":24,"_377":24,"_378":57,"_379":-5,"_380":-7,"_381":-7,"_382":61,"_383":24,"_384":24,"_385":-5,"_386":24,"_387":24,"_388":24,"_389":-5},"ENV",{"_341":342,"_343":344,"_345":85,"_346":347,"_348":349,"_350":351,"_352":353,"_354":355,"_356":357,"_358":359,"_360":361,"_362":363,"_364":365,"_366":367,"_368":369},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","71c1b20804b3232a7e513be260cfffc1932a9e97","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"]

Diff · v21