feat: add Telegram notification channel

server/src/lib/notifications/channels/telegram-channel.js

@@ -0,0 +1,67 @@
+import {
+  renderOrderCreatedTg,
+  renderOrderStatusChangedTg,
+  renderOrderMessageTg,
+  renderPaymentStatusChangedTg,
+  renderAdminOrderCreatedTg,
+  renderAdminNewReviewTg,
+  renderAuthCodeTg,
+} from '../templates/telegram-templates.js'
+
+const TELEGRAM_BOT_TOKEN = process.env.TELEGRAM_BOT_TOKEN || ''
+
+const templateRenderers = {
+  'order:created': renderOrderCreatedTg,
+  'order:statusChanged': renderOrderStatusChangedTg,
+  'orderMessage:adminReply': renderOrderMessageTg,
+  'payment:statusChanged': renderPaymentStatusChangedTg,
+  'order:created:admin': renderAdminOrderCreatedTg,
+  'orderMessage:sent': renderOrderMessageTg,
+  'review:created': renderAdminNewReviewTg,
+  'auth:codeRequested': renderAuthCodeTg,
+}
+
+async function postToTelegram(chatId, text) {
+  if (!TELEGRAM_BOT_TOKEN) {
+    console.log(`[DEV] telegram to ${chatId}: ${text.slice(0, 80)}`)
+    return { success: true }
+  }
+
+  try {
+    const res = await fetch(`https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        chat_id: chatId,
+        text,
+        parse_mode: 'HTML',
+      }),
+    })
+
+    const data = await res.json()
+    if (!data.ok) {
+      return { success: false, error: data.description || 'Telegram API error' }
+    }
+    return { success: true }
+  } catch (err) {
+    return { success: false, error: err.message }
+  }
+}
+
+export const telegramChannel = {
+  name: 'telegram',
+
+  async send({ recipient: chatId, eventType, payload }) {
+    if (!chatId) {
+      return { success: false, error: 'No telegram chatId' }
+    }
+
+    const renderer = templateRenderers[eventType]
+    if (!renderer) {
+      return { success: false, error: `No telegram template for event: ${eventType}` }
+    }
+
+    const text = renderer(payload)
+    return postToTelegram(chatId, text)
+  },
+}