feat: python worker (bot, scraper, notifier, scheduler)

worker/src/notifier.py

@@ -0,0 +1,78 @@
+import logging
+from datetime import datetime
+
+import asyncpg
+from telegram import InlineKeyboardButton, InlineKeyboardMarkup
+from telegram.ext import ExtBot
+
+logger = logging.getLogger(__name__)
+
+
+async def notify_new_ad(
+    bot: ExtBot,
+    telegram_id: int,
+    ad: dict,
+) -> None:
+    price_str = f"{ad['price']:,.0f}" if ad.get("price") is not None else "N/A"
+
+    published_str = ""
+    if ad.get("published_at"):
+        try:
+            dt = datetime.fromisoformat(ad["published_at"])
+            published_str = f"Published: {dt:%d.%m.%Y %H:%M}"
+        except (ValueError, TypeError):
+            published_str = f"Published: {ad['published_at']}"
+
+    location_line = f" | 📍 {ad['location']}" if ad.get("location") else ""
+
+    text = (
+        f"🔍 New listing found!\n\n"
+        f"{ad.get('title', 'Untitled')}\n"
+        f"💰 {price_str} €{location_line}\n"
+    )
+    if published_str:
+        text += f"{published_str}\n"
+
+    keyboard = []
+    if ad.get("url"):
+        keyboard.append(
+            [InlineKeyboardButton("View Ad", url=ad["url"])]
+        )
+
+    reply_markup: InlineKeyboardMarkup | None = (
+        InlineKeyboardMarkup(keyboard) if keyboard else None
+    )
+
+    try:
+        message = await bot.send_message(
+            chat_id=telegram_id,
+            text=text,
+            reply_markup=reply_markup,
+        )
+        logger.info(
+            "Sent notification to %s for ad %s (msg_id=%s)",
+            telegram_id,
+            ad.get("wh_ad_id"),
+            message.message_id,
+        )
+    except Exception:
+        logger.exception("Failed to send Telegram notification")
+
+
+async def mark_notified(pool: asyncpg.Pool, search_query_id: str, ad_id: str) -> None:
+    await pool.execute(
+        "UPDATE query_ads SET is_notified = true WHERE search_query_id = $1 AND ad_id = $2",
+        search_query_id,
+        ad_id,
+    )
+
+
+async def log_notification(
+    pool: asyncpg.Pool, user_id: str, ad_id: str, message_id: int
+) -> None:
+    await pool.execute(
+        "INSERT INTO notifications (user_id, ad_id, message_id) VALUES ($1, $2, $3)",
+        user_id,
+        ad_id,
+        message_id,
+    )