feat: add conversational Telegram AI chat

lib/alerts/telegram.mjs

@@ -23,6 +23,8 @@ const COMMANDS = {
   '/status':    'Get current system health, last sweep time, source status',
   '/sweep':     'Trigger a manual sweep cycle',
   '/brief':     'Get a compact text summary of the latest intelligence',
+  '/ask':       'Ask the configured AI about current intelligence',
+  '/reset':     'Clear the AI conversation history',
   '/portfolio': 'Show current positions and P&L (if Alpaca connected)',
   '/alerts':    'Show recent alert history',
   '/mute':      'Mute alerts for 1h (or /mute 2h, /mute 4h)',
@@ -39,7 +41,9 @@ export class TelegramAlerter {
     this._muteUntil = null;      // Mute timestamp
     this._lastUpdateId = 0;      // For polling bot commands
     this._commandHandlers = {};  // Registered command callbacks
+    this._messageHandler = null; // Conversational free-text callback
     this._pollingInterval = null;
+    this._pollInProgress = false;
     this._botUsername = null;
     this._pollFailureCount = 0;
     this._lastPollErrorLogAt = 0;
@@ -61,7 +65,7 @@ export class TelegramAlerter {
   async sendMessage(message, opts = {}) {
     if (!this.isConfigured) return { ok: false };
     const chatId = opts.chatId ?? this.chatId;
-    const parseMode = opts.parseMode || 'Markdown';
+    const parseMode = Object.hasOwn(opts, 'parseMode') ? opts.parseMode : 'Markdown';
     const chunks = this._chunkText(message, TELEGRAM_MAX_TEXT);
 
     try {
@@ -73,7 +77,7 @@ export class TelegramAlerter {
           body: JSON.stringify({
             chat_id: chatId,
             text: chunks[i],
-            parse_mode: parseMode,
+            ...(parseMode ? { parse_mode: parseMode } : {}),
             disable_web_page_preview: opts.disablePreview !== false,
             ...(opts.replyToMessageId && i === 0 ? { reply_to_message_id: opts.replyToMessageId } : {}),
           }),
@@ -309,6 +313,25 @@ export class TelegramAlerter {
     this._commandHandlers[command.toLowerCase()] = handler;
   }
 
+  onMessage(handler) {
+    this._messageHandler = handler;
+  }
+
+  async sendChatAction(chatId, action = 'typing') {
+    if (!this.isConfigured) return false;
+    try {
+      const res = await fetch(`${TELEGRAM_API}/bot${this.botToken}/sendChatAction`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ chat_id: chatId, action }),
+        signal: AbortSignal.timeout(10000),
+      });
+      return res.ok;
+    } catch {
+      return false;
+    }
+  }
+
   /**
    * Start polling for incoming messages/commands.
    * Call this once during server startup.
@@ -339,6 +362,8 @@ export class TelegramAlerter {
   }
 
   async _pollUpdates() {
+    if (this._pollInProgress) return;
+    this._pollInProgress = true;
     try {
       const params = new URLSearchParams({
         offset: String(this._lastUpdateId + 1),
@@ -378,6 +403,8 @@ export class TelegramAlerter {
           console.error(`[Telegram] Poll degraded (${this._pollFailureCount} consecutive failures):`, err.message);
         }
       }
+    } finally {
+      this._pollInProgress = false;
     }
   }
 
@@ -386,10 +413,15 @@ export class TelegramAlerter {
     const parts = text.split(/\s+/);
     const rawCommand = parts[0].toLowerCase();
     const command = this._normalizeCommand(rawCommand);
-    if (!command) return;
     const args = parts.slice(1).join(' ');
     const replyChatId = msg.chat?.id;
 
+    if (!command) {
+      if (!this._messageHandler) return;
+      await this._runMessageHandler(this._messageHandler, text, msg, { parseMode: null });
+      return;
+    }
+
     // Built-in commands
     if (command === '/help') {
       const helpText = Object.entries(COMMANDS)
@@ -440,10 +472,15 @@ export class TelegramAlerter {
     // Delegate to registered handlers
     const handler = this._commandHandlers[command];
     if (handler) {
+      const stopTyping = this._startTyping(replyChatId);
       try {
-        const response = await handler(args, msg.message_id);
+        const response = await handler(args, msg.message_id, msg);
         if (response) {
-          await this.sendMessage(response, { chatId: replyChatId, replyToMessageId: msg.message_id });
+          const text = typeof response === 'string' ? response : response.text;
+          const parseMode = typeof response === 'object' && Object.hasOwn(response, 'parseMode')
+            ? response.parseMode
+            : undefined;
+          await this.sendMessage(text, { chatId: replyChatId, replyToMessageId: msg.message_id, ...(parseMode !== undefined ? { parseMode } : {}) });
         }
       } catch (err) {
         console.error(`[Telegram] Command ${command} error:`, err.message);
@@ -451,11 +488,47 @@ export class TelegramAlerter {
           `❌ Command failed: ${err.message}`,
           { chatId: replyChatId, replyToMessageId: msg.message_id }
         );
+      } finally {
+        stopTyping();
       }
     }
     // Unknown commands are silently ignored to avoid spamming
   }
 
+  async _runMessageHandler(handler, text, msg, { parseMode = null } = {}) {
+    const replyChatId = msg.chat?.id;
+    const stopTyping = this._startTyping(replyChatId);
+    try {
+      const response = await handler(text, msg);
+      if (!response) return;
+      const responseText = typeof response === 'string' ? response : response.text;
+      const responseParseMode = typeof response === 'object' && Object.hasOwn(response, 'parseMode')
+        ? response.parseMode
+        : parseMode;
+      await this.sendMessage(responseText, {
+        chatId: replyChatId,
+        replyToMessageId: msg.message_id,
+        parseMode: responseParseMode,
+      });
+    } catch (err) {
+      console.error('[Telegram] AI chat error:', err.message);
+      await this.sendMessage('AI chat failed. Please try again or use /status to check the LLM configuration.', {
+        chatId: replyChatId,
+        replyToMessageId: msg.message_id,
+        parseMode: null,
+      });
+    } finally {
+      stopTyping();
+    }
+  }
+
+  _startTyping(chatId) {
+    this.sendChatAction(chatId);
+    const interval = setInterval(() => this.sendChatAction(chatId), 4000);
+    interval.unref?.();
+    return () => clearInterval(interval);
+  }
+
   async _initializeBotCommands() {
     await this._loadBotIdentity();