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University Lecture Management Bot\n// Platform: Val Town\n// Language: TypeScript\n\nimport { kv } from \"https://esm.town/v/std/kv\";\n\nconst BOT_TOKEN = process.env.TELEGRAM_BOT_TOKEN;\nif (!BOT_TOKEN) throw new Error(\"Missing TELEGRAM_BOT_TOKEN\");\n\nconst API = `https://api.telegram.org/bot${BOT_TOKEN}`;\n\n// ====== Types ======\ntype Node = {\n id: string;\n title: string;\n parent: string | null;\n children: string[];\n files: string[];\n};\n\ntype UserState = {\n path: string[];\n};\n\ntype AdminData = {\n admins: number[]غ\n};\n\n// ====== Constants ======\nconst ROOT_ID = \"root\";\nconst SUPER_ADMIN = 1579607914;\n\n// ====== Init ======\nasync function init() {\n if (!(await kv.get([\"node\", ROOT_ID]))) {\n await kv.set([\"node\", ROOT_ID], {\n id: ROOT_ID,\n title: \"Main Menu\",\n parent: null,\n children: [],\n files: [],\n });\n }\n\n if (!(await kv.get([\"admins\"]))) {\n await kv.set([\"admins\"], { admins: [SUPER_ADMIN] });\n }\n}\nawait init();\n\n// ====== Helpers ======\nasync function sendMessage(chatId: number, text: string, keyboard?: string[][]) {\n await fetch(`${API}/sendMessage`, {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({\n chat_id: chatId,\n text,\n reply_markup: keyboard\n ? { keyboard, resize_keyboard: true }\n : undefined,\n }),\n });\n}\n\nasync function isAdmin(userId: number): Promise {\n const data = await kv.get([\"admins\"]);\n return data?.admins.includes(userId) ?? false;\n}\n\nasync function getUserState(userId: number): Promise {\n return (\n (await kv.get([\"state\", userId])) ?? {\n path: [ROOT_ID],\n }\n );\n}\n\nasync function setUserState(userId: number, state: UserState) {\n await kv.set([\"state\", userId], state);\n}\n\nasync function currentNode(state: UserState): Promise {\n return (await kv.get([\"node\", state.path.at(-1)!]))!;\n}\n\nfunction buildKeyboard(node: Node, admin: boolean): string[][] {\n const buttons = node.children.map((id) => [id]);\n\n const nav: string[][] = [];\n if (node.parent) nav.push([\"🔙 Back\"]);\n\n if (admin) {\n nav.push([\"➕ Add Button\"]);\n }\n\n return [...buttons.map((b) => [b[0]]), ...nav];\n}\n\n// ====== Update Handler ======\nexport default async function handler(req: Request) {\n const update = await req.json();\n if (!update.message) return new Response(\"OK\");\n\n const msg = update.message;\n const chatId = msg.chat.id;\n const userId = msg.from.id;\n const text = msg.text;\n\n const admin = await isAdmin(userId);\n const state = await getUserState(userId);\n const node = await currentNode(state);\n\n // START\n if (text === \"/start\") {\n state.path = [ROOT_ID];\n await setUserState(userId, state);\n const root = await currentNode(state);\n return sendMessage(chatId, \"Welcome to the Lecture Bot\", buildKeyboard(root, admin));\n }\n\n // BACK\n if (text === \"🔙 Back\" && node.parent) {\n state.path.pop();\n await setUserState(userId, state);\n const parent = await currentNode(state);\n return sendMessage(chatId, parent.title, buildKeyboard(parent, admin));\n }\n\n // ADD BUTTON (Admin)\n if (text === \"➕ Add Button\" && admin) {\n await sendMessage(chatId, \"Send the new button name:\");\n await kv.set([\"awaiting\", userId], node.id);\n return;\n }\n\n // Handle awaiting button name\n const awaiting = await kv.get([\"awaiting\", userId]);\n if (awaiting) {\n const id = crypto.randomUUID();\n const newNode: Node = {\n id,\n title: text,\n parent: awaiting,\n children: [],\n files: [],\n };\n\n const parent = (await kv.get([\"node\", awaiting]))!;\n parent.children.push(id);\n\n await kv.set([\"node\", id], newNode);\n await kv.set([\"node\", awaiting], parent);\n await kv.delete([\"awaiting\", userId]);\n\n return sendMessage(chatId, \"Button added successfully ✅\");\n }\n\n // Navigate\n const child = node.children.find((id) => id === text);\n if (child) {\n state.path.push(child);\n await setUserState(userId, state);\n const next = await currentNode(state);\n return sendMessage(chatId, next.title, buildKeyboard(next, admin));\n }\n\n // Save files\n if (msg.document || msg.video || msg.photo || msg.voice) {\n const fileId =\n msg.document?.file_id ||\n msg.video?.file_id ||\n msg.voice?.file_id ||\n msg.photo?.at(-1)?.file_id;\n\n if (fileId && admin) {\n node.files.push(fileId);\n await kv.set([\"node\", node.id], node);\n return sendMessage(chatId, \"File saved successfully 📂\");\n }\n }\n\n return new Response(\"OK\");\n}","deleted","label",[99],"permalink","https://www.val.town/x/Ruba2/Botuni2000/code/main.ts","extension","actionData","errors"]