add telegram post creation feature but experimental

src/database/client.py

@@ -817,6 +817,63 @@ class DatabaseClient:
             await cache.invalidate_linkedin_account(user_id)
         logger.info(f"Deleted LinkedIn account: {account_id}")
 
+    # ==================== TELEGRAM ACCOUNTS ====================
+
+    async def get_telegram_account(self, user_id: UUID) -> Optional['TelegramAccount']:
+        """Get Telegram account for user."""
+        from src.database.models import TelegramAccount
+        result = await asyncio.to_thread(
+            lambda: self.client.table("telegram_accounts").select("*")
+            .eq("user_id", str(user_id)).eq("is_active", True).execute()
+        )
+        if result.data:
+            return TelegramAccount(**result.data[0])
+        return None
+
+    async def get_telegram_account_by_chat_id(self, chat_id: str) -> Optional['TelegramAccount']:
+        """Get Telegram account by chat_id."""
+        from src.database.models import TelegramAccount
+        result = await asyncio.to_thread(
+            lambda: self.client.table("telegram_accounts").select("*")
+            .eq("telegram_chat_id", chat_id).eq("is_active", True).execute()
+        )
+        if result.data:
+            return TelegramAccount(**result.data[0])
+        return None
+
+    async def save_telegram_account(self, account: 'TelegramAccount') -> 'TelegramAccount':
+        """Create or update a Telegram account connection."""
+        from src.database.models import TelegramAccount
+        data = account.model_dump(exclude={'id', 'created_at', 'updated_at'}, exclude_none=True)
+        data['user_id'] = str(data['user_id'])
+
+        existing = await asyncio.to_thread(
+            lambda: self.client.table("telegram_accounts").select("id")
+            .eq("user_id", str(account.user_id)).execute()
+        )
+
+        if existing.data:
+            result = await asyncio.to_thread(
+                lambda: self.client.table("telegram_accounts").update(data)
+                .eq("user_id", str(account.user_id)).execute()
+            )
+        else:
+            result = await asyncio.to_thread(
+                lambda: self.client.table("telegram_accounts").insert(data).execute()
+            )
+
+        logger.info(f"Saved Telegram account for user: {account.user_id}")
+        return TelegramAccount(**result.data[0])
+
+    async def delete_telegram_account(self, user_id: UUID) -> bool:
+        """Delete Telegram account connection for user."""
+        await asyncio.to_thread(
+            lambda: self.client.table("telegram_accounts").delete()
+            .eq("user_id", str(user_id)).execute()
+        )
+        logger.info(f"Deleted Telegram account for user: {user_id}")
+        return True
+
     # ==================== USERS ====================
 
     async def get_user(self, user_id: UUID) -> Optional[User]: