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Create a bot with @BotFather (https://t.me/BotFather)\n * 2. Add the token as a TELEGRAM_TOKEN env var on this val\n * 3. The first time this endpoint is hit, it self-registers its webhook\n * with Telegram. Then every message is POSTed here.\n *\n * Commands:\n * /summary <@channel> [count] -> summarize last N messages of a channel\n * /add <@channel> -> add a source channel to watch\n * /sources -> list watched channels\n * /help -> show this help\n */\n\nimport { Bot, webhookCallback } from \"https://deno.land/x/grammy@v1.35.0/mod.ts\";\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\nconst TOKEN = Deno.env.get(\"TELEGRAM_TOKEN\");\nif (!TOKEN) {\n throw new Error(\"TELEGRAM_TOKEN is not set\");\n}\n\nconst bot = new Bot(TOKEN);\n\n// Durable dedup store scoped to this val (survives restarts)\nconst SEEN_KEY = \"seen_hashes\";\n\nfunction hashText(text: string): string {\n // Simple stable hash for deduplication\n let h = 5381;\n for (let i = 0; i < text.length; i++) {\n h = ((h << 5) + h + text.charCodeAt(i)) | 0;\n }\n return \"h\" + Math.abs(h).toString(36);\n}\n\nasync function isDuplicate(text: string): Promise {\n const h = hashText(text);\n const seen = (await blob.getJSON(SEEN_KEY)) ?? [];\n if (seen.includes(h)) return true;\n seen.push(h);\n // keep only the last 2000 hashes to bound storage\n await blob.setJSON(SEEN_KEY, seen.slice(-2000));\n return false;\n}\n\nfunction summarize(messages: string[]): string {\n // Simple extractive summary: first sentence of each unique message\n const points = new Set();\n for (const m of messages) {\n const clean = m.replace(/\\s+/g, \" \").trim();\n if (!clean) continue;\n const firstSentence = clean.split(/[.!?]/)[0];\n if (firstSentence.length > 20) points.add(firstSentence + \".\");\n }\n return \"📰 News digest:\\n\\n\" + Array.from(points).map((p) => \"• \" + p).join(\"\\n\");\n}\n\nbot.command(\"help\", (ctx) =>\n ctx.reply(\n \"Commands:\\n\" +\n \"/summary <@channel> [count] - summarize last N messages of a channel\\n\" +\n \"/add <@channel> - add a source channel to watch\\n\" +\n \"/sources - list watched channels\\n\" +\n \"/help - this help\",\n ),\n);\n\nbot.command(\"start\", (ctx) =>\n ctx.reply(\"👋 News digest bot up and running. Try /help.\"),\n);\n\nbot.command(\"add\", async (ctx) => {\n const channel = ctx.message.text.split(/\\s+/)[1];\n if (!channel || !channel.startsWith(\"@\")) {\n await ctx.reply(\"Usage: /add @channelname\");\n return;\n }\n const list = (await blob.getJSON(\"channels\")) ?? [];\n if (!list.includes(channel)) {\n list.push(channel);\n await blob.setJSON(\"channels\", list);\n }\n await ctx.reply(`Added ${channel}. Watched: ${list.join(\", \")}`);\n});\n\nbot.command(\"sources\", async (ctx) => {\n const list = (await blob.getJSON(\"channels\")) ?? [];\n await ctx.reply(list.length ? list.join(\", \") : \"No channels yet. Use /add @channel\");\n});\n\nbot.command(\"summary\", async (ctx) => {\n const parts = ctx.message.text.split(/\\s+/);\n const channel = parts[1];\n const count = parseInt(parts[2] ?? \"5\", 10) || 5;\n if (!channel || !channel.startsWith(\"@\")) {\n await ctx.reply(\"Usage: /summary @channel [count]\");\n return;\n }\n const cleanName = channel.replace(\"@\", \"\");\n const data = await fetch(`https://api.telegram.org/bot${TOKEN}/getChat`, {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ chat_id: channel }),\n });\n if (!data.ok) {\n await ctx.reply(\"Could not read that channel. Make sure the bot is a member/admin.\");\n return;\n }\n const messages: string[] = [];\n let offset = 0;\n try {\n for (let i = 0; i < Math.ceil(count / 100); i++) {\n const res = await fetch(\n `https://api.telegram.org/bot${TOKEN}/getUpdates?offset=${offset}&limit=100`,\n );\n const json = await res.json();\n const updates = json.result ?? [];\n for (const u of updates) {\n offset = u.update_id + 1;\n const text = u.channel_post?.text ?? u.message?.text;\n if (text && u.channel_post?.chat?.username === cleanName) messages.push(text);\n }\n }\n } catch {\n await ctx.reply(\"Error fetching updates.\");\n return;\n }\n\n const fresh: string[] = [];\n for (const m of messages.reverse().slice(0, count)) {\n if (!(await isDuplicate(m))) fresh.push(m);\n }\n\n if (!fresh.length) {\n await ctx.reply(\"No new news — everything looks like it's already been covered. ✨\");\n return;\n }\n await ctx.reply(summarize(fresh));\n});\n\n// Use part of the TELEGRAM_TOKEN itself as the secret_token\n// to authorize webhook requests.\nconst SECRET_TOKEN = TOKEN.split(\":\")[1];\n\nconst handleUpdate = webhookCallback(\n bot,\n \"std/http\",\n undefined,\n undefined,\n SECRET_TOKEN,\n);\n\nlet isEndpointSet = false;\nexport default async (req: Request): Promise => {\n // Set webhook if it is not set yet\n // Do this in the HTTP handler so we get the endpoint url from req.url\n // This is a no-op if nothing's changed\n if (!isEndpointSet) {\n await bot.api.setWebhook(req.url, {\n secret_token: SECRET_TOKEN,\n });\n isEndpointSet = true;\n }\n if (req.method === \"POST\") {\n return await handleUpdate(req);\n }\n return new Response(\n \"Telegram News Digest Bot running.\",\n { status: 200, headers: { \"content-type\": \"text/plain\" } },\n );\n};\n","deleted","label",[110],"pulls","branches","forks","envVars",{"_132":117,"_134":42},"connections",{"_132":42,"_133":42},"count","unfilledCount","emptyCount",{"_18":109,"_20":110,"_111":36,"_112":-5,"_113":68,"_114":66,"_115":38,"_22":136,"_65":117,"_118":119,"_120":121,"_122":26,"_123":-5,"_137":138,"_86":139},["D",1789409359668],"children",[],[110],["D",1789409255712],{"_16":17,"_84":80},{"_16":17,"_77":78,"_79":80,"_33":34,"_81":82,"_83":26},{"_65":66,"_20":67,"_18":68,"_69":19,"_70":-5,"_71":-5,"_72":-5,"_73":-5,"_74":-5,"_75":21,"_76":17},"ctx",{"_58":-5,"_105":177,"_178":179,"_180":181,"_182":26,"_183":26,"_184":26,"_185":38,"_186":-5,"_187":-7,"_188":-7,"_189":42,"_190":26,"_191":26,"_192":-5,"_193":26,"_194":26,"_195":26,"_196":-5},"ENV",{"_148":149,"_150":151,"_152":67,"_153":154,"_155":156,"_157":158,"_159":160,"_161":162,"_163":164,"_165":166,"_167":168,"_169":170,"_171":172,"_173":174,"_175":176},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","518c05f2c13b243481ef29134a5672756425e459","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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