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 { parseProject, readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n```\n\n### Available Utilities\n\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\" urls:\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 Standard Library utilities ONLY RUN ON THE SERVER.\nIf you need access to this data on the client, run it in the server and pass it to the client by splicing it into the HTML page\nor by making an API request for it.\n\n## Val Town Platform Specifics\n\n- **Redirects:** Use `return new Response(null, { status: 302, headers: { Location: \"/place/to/redirect\" }})` instead of `Response.redirect` which is broken\n- **Images:** Avoid external images or base64 images. Use emojis, unicode symbols, or icon fonts/libraries instead\n- **AI Image:** To inline generate an AI image use: `

`\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) unless otherwise specified\n- **View Source:** Add a view source link by importing & using `import.meta.url.replace(\"ems.sh\", \"val.town)\"` (or passing this data to the client) and include `target=\"_top\"` attribute\n- **Error Debugging:** Add `` to HTML to capture client-side errors\n- **Error Handling:** Only use try...catch when there's a clear local resolution; Avoid catches that merely log or return 500s. Let errors bubble up with full context\n- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but generally prefer APIs that don't require keys\n- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure compatibility on server and browser\n- **Storage Strategy:** Only use backend storage if explicitly required; prefer simple static client-side sites\n- **React Configuration:** When using React libraries, pin versions with `?deps=react@18.2.0,react-dom@18.2.0` and start the file with `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- Ensure all React dependencies and sub-dependencies are pinned to the same version\n- **Styling:** Default to using TailwindCSS via `` unless otherwise specified\n\n## Project Structure and Design Patterns\n\n### Recommended Directory Structure\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 files:\n ```ts\n import { readFile, serveFile } 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(\"\", `${dataScript}`);\n return c.html(html);\n });\n ```\n- Create RESTful API routes for CRUD operations\n- Always include this snippet at the top-level Hono app to re-throwing errors to see full stack traces:\n ```ts\n // Unwrap Hono errors to see original error details\n app.onError((err, c) => {\n throw err;\n });\n ```\n\n### Database Patterns\n- Run migrations on startup or comment out for performance\n- Change table names when modifying schemas rather than altering\n- Export clear query functions with proper TypeScript typing\n\n## Common Gotchas and Solutions\n\n1. **Environment Limitations:** \n - Val Town runs on Deno in a serverless context, not Node.js\n - Code in `shared/` must work in both frontend and backend environments\n - Cannot use `Deno` keyword in shared code\n - Use `https://esm.sh` for imports that work in both environments\n\n2. **SQLite Peculiarities:**\n - Limited support for ALTER TABLE operations\n - Create new tables with updated schemas and copy data when needed\n - Always run table creation before querying\n\n3. **React Configuration:**\n - All React dependencies must be pinned to 18.2.0\n - Always include `@jsxImportSource https://esm.sh/react@18.2.0` at the top of React files\n - Rendering issues often come from mismatched React versions\n\n4. **File Handling:**\n - Val Town only supports text files, not binary\n - Use the provided utilities to read files across branches and forks\n - For files in the project, use `readFile` helpers\n\n5. **API Design:**\n - `fetch` handler is the entry point for HTTP vals\n - Run the Hono app with `export default app.fetch // This is the entry point for HTTP vals`\n\n",[],[99],{"_103":180,"_95":181,"_153":182,"_155":-5,"_156":138,"_157":183,"_159":160,"_105":184,"_100":32,"_162":163,"_164":185,"_166":22,"_167":-5,"_168":186,"_98":187},"8a392db4-9136-11f0-9055-0224a6c84d84","deno.json","8a392e9a-9136-11f0-9055-0224a6c84d84",2,["D",1757832388133],"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/348900b8b79f4a434cab4c74b3bc8d4d2fa8ee74/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": false,\n \"types\": [\n \"https://www.val.town/types/valtown.d.ts\"\n ],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"files\": {\n \"include\": [\n \"deno:/https/esm.town/**/*\"\n ]\n },\n \"rules\": {\n \"exclude\": [\n \"no-explicit-any\"\n ]\n }\n },\n \"node_modules_dir\": false,\n \"experimental\": {\n \"unstable-node-globals\": true,\n \"unstable-temporal\": true,\n \"unstable-worker-options\": true,\n \"unstable-sloppy-imports\": true\n }\n}",[],[181],{"_103":189,"_95":190,"_153":191,"_155":-5,"_156":138,"_157":137,"_159":160,"_105":192,"_100":174,"_162":193,"_164":194,"_166":22,"_167":-5,"_168":195,"_98":196},"d66693d2-920f-11f0-851d-0224a6c84d84","manga-updates-monitor.cron.tsx","8a5290d8-9136-11f0-8288-0224a6c84d84",["D",1757925716761],"interval","/** @jsxImportSource https://esm.sh/react@18.2.0 */\n\nimport { blob } from \"https://esm.town/v/std/blob\";\nimport { parseRssFeed } from \"https://esm.sh/feedsmith@2.0.0\";\n\n// Types for RSS feed data\ninterface RSSItem {\n title: string;\n description: string;\n link?: string;\n pubDate?: string;\n guid?: string;\n}\n\ninterface RSSFeed {\n title: string;\n description: string;\n link: string;\n items: RSSItem[];\n}\n\ninterface ProcessedItem {\n title: string;\n description: string;\n processedAt: string;\n}\n\ninterface SeriesConfig {\n id: string;\n name: string;\n rssUrl: string;\n sourceFilter: string; // e.g., \"Asura\", \"LINE Webtoon\", etc.\n color: number; // Discord embed color\n}\n\n// Configuration for multiple series\nconst SERIES_CONFIGS: SeriesConfig[] = [\n {\n id: \"absolute_regression\",\n name: \"Absolute Regression\",\n rssUrl: \"https://api.mangaupdates.com/v1/series/73697803962/rss\",\n sourceFilter: \"Asura\",\n color: 0x00ff00 // Green\n },\n {\n id: \"eternally_regressing_knight\",\n name: \"Eternally Regressing Knight\",\n rssUrl: \"https://api.mangaupdates.com/v1/series/35590700362/rss\",\n sourceFilter: \"Asura\",\n color: 0x0099ff // Blue\n }\n];\n\nconst DISCORD_WEBHOOK_URL = Deno.env.get(\"DISCORD_WEBHOOK_URL\");\nconst STORAGE_KEY_PREFIX = \"manga_updates_\";\n\n// Parse RSS feed using Feedsmith\nasync function parseRSSFeed(url: string): Promise {\n const response = await fetch(url);\n if (!response.ok) {\n throw new Error(`Failed to fetch RSS feed: ${response.status} ${response.statusText}`);\n }\n \n const xmlText = await response.text();\n \n // Parse the RSS feed using Feedsmith\n const feed = parseRssFeed(xmlText);\n \n // Extract items from the parsed feed\n const items: RSSItem[] = (feed.items || []).map(item => ({\n title: item.title || \"\",\n description: item.description || \"\",\n link: item.link,\n pubDate: item.pubDate,\n guid: item.guid\n }));\n \n return {\n title: feed.title || \"Unknown Feed\",\n description: feed.description || \"\",\n link: feed.link || \"\",\n items\n };\n}\n\n// Get last run time from storage for a specific series\nasync function getLastRunTime(seriesId: string): Promise {\n try {\n const lastRun = await blob.getJSON(`${STORAGE_KEY_PREFIX}${seriesId}_last_run`);\n return lastRun ? new Date(lastRun as string) : null;\n } catch {\n return null;\n }\n}\n\n// Save current run time to storage for a specific series\nasync function saveLastRunTime(seriesId: string): Promise {\n await blob.setJSON(`${STORAGE_KEY_PREFIX}${seriesId}_last_run`, new Date().toISOString());\n}\n\n// Get processed items from storage for a specific series\nasync function getProcessedItems(seriesId: string): Promise {\n try {\n const processed = await blob.getJSON(`${STORAGE_KEY_PREFIX}${seriesId}_processed_items`);\n return processed as ProcessedItem[] || [];\n } catch {\n return [];\n }\n}\n\n// Save processed items to storage for a specific series (keep only last 100 items to prevent storage bloat)\nasync function saveProcessedItems(seriesId: string, items: ProcessedItem[]): Promise {\n // Keep only the last 100 processed items to prevent storage from growing indefinitely\n const trimmedItems = items.slice(-100);\n await blob.setJSON(`${STORAGE_KEY_PREFIX}${seriesId}_processed_items`, trimmedItems);\n}\n\n// Check if item is new (not processed before)\nfunction isNewItem(item: RSSItem, processedItems: ProcessedItem[]): boolean {\n return !processedItems.some(processed => \n processed.title === item.title && processed.description === item.description\n );\n}\n\n// Send Discord webhook notification\nasync function sendDiscordNotification(item: RSSItem, seriesConfig: SeriesConfig): Promise {\n if (!DISCORD_WEBHOOK_URL) {\n throw new Error(\"DISCORD_WEBHOOK_URL environment variable is not set\");\n }\n\n const embed = {\n title: item.title,\n description: `📚 New chapter released by ${seriesConfig.sourceFilter}!`,\n color: seriesConfig.color,\n timestamp: new Date().toISOString(),\n footer: {\n text: \"MangaUpdates RSS Monitor\"\n },\n fields: [\n {\n name: \"Series\",\n value: seriesConfig.name,\n inline: true\n },\n {\n name: \"Source\",\n value: seriesConfig.sourceFilter,\n inline: true\n }\n ]\n };\n\n if (item.link) {\n (embed as any).url = item.link;\n }\n\n const payload = {\n username: \"Manga Updates Bot\",\n avatar_url: \"https://www.mangaupdates.com/favicon.ico\",\n content: `🆕 **${item.title}** - New Chapter Available!`,\n embeds: [embed]\n };\n\n const response = await fetch(DISCORD_WEBHOOK_URL, {\n method: \"POST\",\n headers: {\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify(payload)\n });\n\n if (!response.ok) {\n const errorText = await response.text();\n throw new Error(`Discord webhook failed: ${response.status} ${response.statusText} - ${errorText}`);\n }\n}\n\n// Process a single series\nasync function processSeries(seriesConfig: SeriesConfig): Promise {\n console.log(`Processing series: ${seriesConfig.name}`);\n \n // Parse the RSS feed\n const feed = await parseRSSFeed(seriesConfig.rssUrl);\n console.log(`Parsed feed: ${feed.title} with ${feed.items.length} items`);\n \n // Get last run time and processed items for this series\n const lastRunTime = await getLastRunTime(seriesConfig.id);\n const processedItems = await getProcessedItems(seriesConfig.id);\n \n console.log(`Last run for ${seriesConfig.name}: ${lastRunTime || \"Never\"}`);\n console.log(`Previously processed items for ${seriesConfig.name}: ${processedItems.length}`);\n \n // Filter for new items with matching source filter\n const newItems = feed.items.filter(item => \n isNewItem(item, processedItems) && item.description === seriesConfig.sourceFilter\n );\n console.log(`Found ${newItems.length} new ${seriesConfig.sourceFilter} items for ${seriesConfig.name}`);\n \n // Process new items\n const newlyProcessedItems: ProcessedItem[] = [];\n \n for (const item of newItems) {\n try {\n console.log(`Processing: ${item.title} for ${seriesConfig.name}`);\n await sendDiscordNotification(item, seriesConfig);\n \n // Mark as processed\n newlyProcessedItems.push({\n title: item.title,\n description: item.description,\n processedAt: new Date().toISOString()\n });\n \n // Small delay to avoid rate limiting\n await new Promise(resolve => setTimeout(resolve, 1000));\n } catch (error) {\n console.error(`Failed to process item \"${item.title}\" for ${seriesConfig.name}:`, error);\n // Continue processing other items even if one fails\n }\n }\n \n // Update storage with new processed items for this series\n if (newlyProcessedItems.length > 0) {\n const allProcessedItems = [...processedItems, ...newlyProcessedItems];\n await saveProcessedItems(seriesConfig.id, allProcessedItems);\n console.log(`Added ${newlyProcessedItems.length} items to processed list for ${seriesConfig.name}`);\n }\n \n // Update last run time for this series\n await saveLastRunTime(seriesConfig.id);\n \n console.log(`Completed processing ${seriesConfig.name}. Processed ${newlyProcessedItems.length} new items.`);\n return newlyProcessedItems.length;\n}\n\n// Main CRON function\nexport default async function () {\n try {\n console.log(\"Starting MangaUpdates RSS monitoring for multiple series...\");\n \n // Validate environment variables\n if (!DISCORD_WEBHOOK_URL) {\n throw new Error(\"DISCORD_WEBHOOK_URL environment variable is not set. Please configure it in Val Town.\");\n }\n \n let totalProcessedItems = 0;\n \n // Process each configured series\n for (const seriesConfig of SERIES_CONFIGS) {\n try {\n const processedCount = await processSeries(seriesConfig);\n totalProcessedItems += processedCount;\n } catch (error) {\n console.error(`Failed to process series ${seriesConfig.name}:`, error);\n // Continue processing other series even if one fails\n }\n }\n \n console.log(`MangaUpdates monitoring completed. Total processed items across all series: ${totalProcessedItems}`);\n \n } catch (error) {\n console.error(\"MangaUpdates monitoring failed:\", error);\n throw error; // Re-throw to see full error in Val Town logs\n }\n}\n",[],[190],"files",[150,171,179,188],"counts",{"_201":32,"_202":174,"_203":32,"_204":174},"pulls","branches","forks","envVars","contents",[],{"_103":172,"_156":138,"_153":173,"_95":99,"_164":176,"_162":163,"_100":32,"_155":-5,"_105":208,"_157":174,"_167":-5,"_98":209},["D",1757832388133],[99],"upstreamProject","upstreamBranch","emptyEnvVars","isNew","flags",[],"routes/_app.x.$handle.$name.branch.$branch.history_.$",{"_93":94,"_95":96,"_97":43,"_98":99,"_101":218,"_163":223,"_226":227,"_230":231,"_234":-7,"_235":32,"_236":22},{"_103":104,"_95":96,"_105":219,"_107":-5,"_108":22,"_109":110,"_111":112,"_113":-5,"_14":114,"_115":-5,"_116":22,"_117":-5,"_118":32,"_16":119,"_120":121,"_122":121,"_123":124,"_125":124,"_126":124,"_127":121,"_128":121,"_23":220,"_132":221,"_135":222,"_147":22},["D",1757832353784],{"_93":94,"_130":131},{"_93":94,"_134":131},{"_100":137,"_95":43,"_103":138,"_139":104,"_140":-5,"_141":-5,"_142":-5,"_143":-5,"_144":-5,"_145":96,"_146":94},{"_103":172,"_95":99,"_153":173,"_155":-5,"_156":138,"_157":174,"_159":160,"_105":224,"_100":32,"_162":163,"_164":176,"_166":22,"_167":-5,"_98":225},["D",1757832388133],[99],"history",[228],{"_103":172,"_156":138,"_153":173,"_95":99,"_164":176,"_162":163,"_100":32,"_155":-5,"_105":229,"_157":174,"_167":-5},["D",1757832388133],"versions",[232],{"_163":228,"_233":-5},"previous","versionNumber","page","hasNext","actionData","errors"]

History for AGENTS.md