From 931396819b8cf405bd77088bed979d89f3fe128c Mon Sep 17 00:00:00 2001
From: lekss361 <alexey.kondratev@balance-pl.ru>
Date: Sat, 23 May 2026 14:48:57 +0300
Subject: [PATCH] =?UTF-8?q?refactor(tradein):=20avito=20search=20=E2=80=94?=
 =?UTF-8?q?=20remove=20jitter=20(C-5)=20+=20mobile=20API=20dead=20code=20+?=
 =?UTF-8?q?=20parse=20houseLinks?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- DELETE _fetch_via_mobile_api + _mobile_item_to_lot (200 LOC dead code, H-6 audit)
- DELETE _RE_AVITO_STATE + _extract_avito_state + _items_from_state (state empty since 2025)
- DELETE _state_item_to_lot (unused after state path removal)
- FIX C-5: _dom_card_to_lot now sets lat=lon=None (no anchor+jitter silent corruption)
  Точные coords придут из avito_detail.py (Stage 2b) или geocode-missing cron
- ADD parse <a href="/catalog/houses/..."> -> house_source/house_ext_id/house_url
- ADD listing_segment detection (vtorichka/novostroyki) from item URL pattern
- EXTEND ScrapedLot (base.py): 4 новых поля
- EXTEND save_listings INSERT: 4 новых колонок

Refs: Stage 2a of AvitoScraper_v2 plan.
---
 .../backend/app/services/scrapers/avito.py    | 277 +++---------------
 .../backend/app/services/scrapers/base.py     |  12 +
 2 files changed, 57 insertions(+), 232 deletions(-)

diff --git a/tradein-mvp/backend/app/services/scrapers/avito.py b/tradein-mvp/backend/app/services/scrapers/avito.py
index 2d724764..6ec92b8c 100644
--- a/tradein-mvp/backend/app/services/scrapers/avito.py
+++ b/tradein-mvp/backend/app/services/scrapers/avito.py
@@ -1,7 +1,6 @@
 """Avito.ru scraper — парсинг вторички вокруг точки.
 
-Стратегия: HTML scrape карточек объявлений + извлечение JSON `__initialState__`
-который Avito вставляет в `<script>` тег.
+Стратегия: HTML scrape карточек объявлений через DOM.
 
 URL pattern (EKB):
   https://www.avito.ru/ekaterinburg/kvartiry/prodam-ASgBAgICAUSSA8YQ
@@ -16,11 +15,8 @@ URL pattern (EKB):
 
 from __future__ import annotations
 
-import json
 import logging
-import random
 import re
-from datetime import date, datetime
 from typing import Any
 from urllib.parse import urlencode, urljoin
 
@@ -47,7 +43,7 @@ class AvitoScraper(BaseScraper):
         super().__init__()
         self._cffi: AsyncSession | None = None
 
-    async def __aenter__(self) -> "AvitoScraper":
+    async def __aenter__(self) -> AvitoScraper:
         await super().__aenter__()
         self._cffi = AsyncSession(
             impersonate="chrome120",
@@ -78,23 +74,13 @@ class AvitoScraper(BaseScraper):
 
         Avito работает в км — конвертируем. Минимум 1 км.
         Возвращаем макс 50 объявлений (страница 1).
+
+        Coords НЕ заполняем из anchor (избегаем silent corruption через jitter).
+        Точные lat/lon приходят позже из avito_detail.py — для search-карточек
+        lat=lon=None, далее geocode-missing cron подтянет из address.
         """
         radius_km = max(1, round(radius_m / 1000))
-        # Сохраняем центр для fallback заполнения coords (Avito HTML state не даёт coords)
-        self._anchor_lat = lat
-        self._anchor_lon = lon
-        self._anchor_radius_m = radius_m
 
-        # Strategy A: попробовать через mobile API (проще, меньше защиты)
-        try:
-            lots = await self._fetch_via_mobile_api(lat, lon, radius_km)
-            if lots:
-                logger.info("avito mobile_api: %d lots around (%.4f, %.4f)", len(lots), lat, lon)
-                return lots
-        except Exception as e:  # noqa: BLE001
-            logger.warning("avito mobile_api failed: %s — falling back to HTML scrape", e)
-
-        # Strategy B: HTML scrape (web) через curl_cffi
         url = self._build_web_url(lat, lon, radius_km, page=1)
         try:
             assert self._cffi is not None
@@ -104,7 +90,7 @@ class AvitoScraper(BaseScraper):
                     "avito HTML returned %d for %s", response.status_code, url
                 )
                 return []
-        except Exception:  # noqa: BLE001
+        except Exception:
             logger.exception("avito HTML fetch failed for %s", url)
             return []
 
@@ -113,101 +99,6 @@ class AvitoScraper(BaseScraper):
         await self.sleep_between_requests()
         return lots
 
-    # ── Strategy A: mobile API ──────────────────────────────────────────────
-    async def _fetch_via_mobile_api(
-        self, lat: float, lon: float, radius_km: int
-    ) -> list[ScrapedLot]:
-        """Avito mobile API endpoint: https://m.avito.ru/api/15/items
-
-        Возвращает JSON с полным structured data — проще, чем HTML scrape.
-        Может быть закрыт за auth — обрабатываем в except выше.
-        """
-        params = {
-            "categoryId": 24,           # квартиры
-            "locationId": 653240,       # ЕКБ (Avito internal)
-            "params[201]": 1,           # тип: продам (вторичка)
-            "geoCoords": f"{lat},{lon}",
-            "radius": radius_km,
-            "page": 1,
-            "limit": 50,
-            "sort": "date",
-        }
-        url = f"https://m.avito.ru/api/15/items?{urlencode(params)}"
-        assert self._cffi is not None
-        response = await self._cffi.get(url, headers={"Accept": "application/json"})
-        if response.status_code != 200:
-            return []
-
-        data = response.json()
-        items = data.get("result", {}).get("items", []) if isinstance(data, dict) else []
-        return [self._mobile_item_to_lot(item) for item in items if isinstance(item, dict)]
-
-    def _mobile_item_to_lot(self, item: dict[str, Any]) -> ScrapedLot | None:
-        """Маппинг Avito mobile API item → ScrapedLot.
-
-        Avito mobile API meanwhile отдаёт title с метаданными квартиры, но
-        address/coords могут быть в разных полях — пробуем все.
-        """
-        try:
-            title = item.get("title", "")
-            # price может быть int или dict {value: N}
-            price_field = item.get("price")
-            if isinstance(price_field, dict):
-                price = price_field.get("value")
-            else:
-                price = price_field
-            if not price:
-                return None
-
-            rooms = _extract_rooms_from_title(title)
-            area = _extract_area_from_title(title)
-            floor, total = _extract_floor_from_title(title)
-
-            # Address — пробуем все возможные пути
-            address = (
-                item.get("address")
-                or item.get("location", {}).get("name") if isinstance(item.get("location"), dict) else ""
-            )
-            if not address and isinstance(item.get("geo"), dict):
-                address = item["geo"].get("formatted_address") or item["geo"].get("address", "")
-            if not address:
-                # Avito mobile API часто отдаёт address в "location.references" или "geo.geoReferences"
-                geo = item.get("geo") or {}
-                if isinstance(geo.get("geoReferences"), list) and geo["geoReferences"]:
-                    address = geo["geoReferences"][0].get("content", "")
-
-            # Coords — тоже пробуем все варианты
-            coords = item.get("coords") or item.get("geo", {}).get("coords") or {}
-            lat = coords.get("lat") if isinstance(coords, dict) else None
-            lon = coords.get("lng") or coords.get("lon") if isinstance(coords, dict) else None
-
-            # Photos
-            photos = []
-            for img in (item.get("images") or [])[:5]:
-                if isinstance(img, dict):
-                    photos.append(img.get("1280x960") or img.get("636x476") or img.get("864x648", ""))
-                elif isinstance(img, str):
-                    photos.append(img)
-
-            return ScrapedLot(
-                source="avito",
-                source_url=urljoin("https://www.avito.ru", item.get("uri", "")),
-                source_id=str(item.get("id")),
-                address=address or None,
-                lat=lat,
-                lon=lon,
-                rooms=rooms,
-                area_m2=area,
-                floor=floor,
-                total_floors=total,
-                price_rub=int(price),
-                photo_urls=[p for p in photos if p],
-                raw_payload=item,  # сохраняем ВСЁ для retrofit и дебага
-            )
-        except Exception:  # noqa: BLE001
-            logger.exception("avito mobile item parse failed: %s", item.get("id"))
-            return None
-
     # ── Strategy B: HTML scrape ─────────────────────────────────────────────
     def _build_web_url(self, lat: float, lon: float, radius_km: int, page: int = 1) -> str:
         params = {
@@ -221,23 +112,10 @@ class AvitoScraper(BaseScraper):
         )
 
     def _parse_html(self, html: str, source_url_base: str) -> list[ScrapedLot]:
-        """Парсим карточки объявлений из HTML.
+        """Парсим карточки объявлений из HTML через DOM scrape.
 
-        Avito embed-ит JSON в `<script>` теге с initial state — пробуем найти.
-        Если структура поменялась — fallback на DOM scrape карточек.
+        Avito state давно пустой — используем только DOM путь.
         """
-        # Попробуем сначала __initialState__ JSON
-        state = _extract_avito_state(html)
-        if state:
-            items = _items_from_state(state)
-            if items:
-                return [
-                    lot
-                    for lot in (self._state_item_to_lot(it) for it in items)
-                    if lot is not None
-                ]
-
-        # Fallback: DOM scrape
         tree = HTMLParser(html)
         cards = tree.css('[data-marker="item"]')
         lots: list[ScrapedLot] = []
@@ -247,56 +125,12 @@ class AvitoScraper(BaseScraper):
                 lots.append(lot)
         return lots
 
-    def _state_item_to_lot(self, item: dict[str, Any]) -> ScrapedLot | None:
-        """Парсинг из __initialState__ JSON. Avito отдаёт минимум полей в нём
-        (часто только title) — fallback на anchor координаты с jitter."""
-        try:
-            price = item.get("priceDetailed", {}).get("value") or item.get("price")
-            if not price:
-                return None
-            title = item.get("title", "")
-            rooms = _extract_rooms_from_title(title)
-            area = _extract_area_from_title(title)
-            floor, total = _extract_floor_from_title(title)
-            coords = item.get("coords") or {}
-            location = item.get("location", {}) if isinstance(item.get("location"), dict) else {}
-
-            lat = coords.get("lat") if isinstance(coords, dict) else None
-            lon = coords.get("lng") if isinstance(coords, dict) else None
-
-            # Fallback: если Avito state не даёт coords — используем anchor с jitter.
-            # Это приближение, но позволяет PostGIS ST_DWithin работать в правильном радиусе.
-            if (lat is None or lon is None) and hasattr(self, "_anchor_lat"):
-                # Jitter в радиусе scrape — chunk радиуса в координатах (1° lat ≈ 111км)
-                jitter_deg = (self._anchor_radius_m / 1000) / 111  # км → градусы
-                lat = self._anchor_lat + (random.random() - 0.5) * jitter_deg
-                lon = self._anchor_lon + (random.random() - 0.5) * jitter_deg / 2  # коррекция по широте
-
-            return ScrapedLot(
-                source="avito",
-                source_url=urljoin("https://www.avito.ru", item.get("urlPath", "")),
-                source_id=str(item.get("id")),
-                address=location.get("name") or item.get("address") or "Екатеринбург (Avito)",
-                lat=lat,
-                lon=lon,
-                rooms=rooms,
-                area_m2=area,
-                floor=floor,
-                total_floors=total,
-                price_rub=int(price),
-                photo_urls=[
-                    img.get("1280x960") or img.get("636x476", "")
-                    for img in item.get("images", [])[:5]
-                    if isinstance(img, dict)
-                ],
-                raw_payload=item,
-            )
-        except Exception:  # noqa: BLE001
-            return None
-
     def _dom_card_to_lot(self, card: Any, source_url_base: str) -> ScrapedLot | None:
-        """Парсинг через DOM. Avito state давно пустой (см. _parse_html) — почти все
-        объявления приходят сюда, поэтому путь обязан тащить и адрес, и фото."""
+        """Парсинг карточки объявления через DOM.
+
+        Avito state давно пустой — единственный путь. Coords из карточки не отдаются,
+        оставляем lat=lon=None (geocode-missing cron подтянет из address).
+        """
         try:
             link_el = card.css_first('a[data-marker="item-title"]')
             if link_el is None:
@@ -314,9 +148,7 @@ class AvitoScraper(BaseScraper):
             area = _extract_area_from_title(title)
             floor, total = _extract_floor_from_title(title)
 
-            # Адрес: первый <p> внутри data-marker="item-location" — это улица + дом.
-            # Второй <p> — метро/район, его отбрасываем. Старый селектор
-            # [class*="geo-address"] мёртв: Avito перешёл на CSS-модули с хешами.
+            # Адрес: первый <p> внутри data-marker="item-location"
             address: str | None = None
             loc_el = card.css_first('[data-marker="item-location"]')
             if loc_el is not None:
@@ -324,7 +156,7 @@ class AvitoScraper(BaseScraper):
                 if street_el is not None:
                     address = street_el.text(strip=True) or None
 
-            # Фото: <img itemprop="image"> карточки-слайдера, реальный URL прямо в src.
+            # Фото
             photo_urls: list[str] = []
             for img in card.css('img[itemprop="image"]'):
                 src = img.attributes.get("src") or ""
@@ -333,27 +165,46 @@ class AvitoScraper(BaseScraper):
                 if len(photo_urls) >= 5:
                     break
 
-            # Anchor jitter — Avito DOM не отдаёт точные coords, используем центр scrape ±jitter
-            lat = lon = None
-            if hasattr(self, "_anchor_lat"):
-                jitter_deg = (self._anchor_radius_m / 1000) / 111
-                lat = self._anchor_lat + (random.random() - 0.5) * jitter_deg
-                lon = self._anchor_lon + (random.random() - 0.5) * jitter_deg / 2
+            # House link: <a href="/catalog/houses/<city>/<slug>/<id>">
+            # or /catalog/houses/<slug>/<id>
+            house_source: str | None = None
+            house_ext_id: str | None = None
+            house_url: str | None = None
+            house_link = card.css_first('a[href^="/catalog/houses/"]')
+            if house_link is not None:
+                h_href = house_link.attributes.get("href", "")
+                parts = [p for p in h_href.strip("/").split("/") if p]
+                # ['catalog', 'houses', <maybe city>, <slug>, <id>]
+                if len(parts) >= 4 and parts[-1].isdigit():
+                    house_source = "avito"
+                    house_ext_id = parts[-1]
+                    house_url = urljoin("https://www.avito.ru", h_href)
+
+            # listing_segment по item URL pattern
+            listing_segment: str | None = None
+            if "/kvartiry/" in href:
+                listing_segment = "vtorichka"
+            elif "/novostroyki/" in href:
+                listing_segment = "novostroyki"
 
             return ScrapedLot(
                 source="avito",
                 source_url=url,
                 source_id=card.attributes.get("data-item-id"),
-                address=address or "Екатеринбург (Avito)",
-                lat=lat,
-                lon=lon,
+                address=address,  # БЕЗ fallback "Екатеринбург (Avito)" — пусть None
+                lat=None,         # C-5 fix: НЕ jitter
+                lon=None,         # C-5 fix: НЕ jitter
                 rooms=rooms,
                 area_m2=area,
                 floor=floor,
                 total_floors=total,
                 price_rub=price,
                 photo_urls=photo_urls,
-                raw_payload={"title": title, "address": address},
+                raw_payload={"title": title, "address": address, "house_ext_id": house_ext_id},
+                house_source=house_source,
+                house_ext_id=house_ext_id,
+                house_url=house_url,
+                listing_segment=listing_segment,
             )
         except Exception:
             return None
@@ -387,41 +238,3 @@ def _extract_floor_from_title(title: str) -> tuple[int | None, int | None]:
     if m:
         return int(m.group(1)), int(m.group(2))
     return None, None
-
-
-# ── Avito __initialState__ extraction ──────────────────────────────────────
-_RE_AVITO_STATE = re.compile(
-    r"window\.__initialState__\s*=\s*\"([^\"]+)\"", re.DOTALL
-)
-
-
-def _extract_avito_state(html: str) -> dict[str, Any] | None:
-    """Avito embed-ит initial state как escaped JSON в большом <script>."""
-    m = _RE_AVITO_STATE.search(html)
-    if not m:
-        return None
-    try:
-        raw = m.group(1).encode("utf-8").decode("unicode_escape")
-        return json.loads(raw)
-    except (UnicodeDecodeError, json.JSONDecodeError):
-        return None
-
-
-def _items_from_state(state: dict[str, Any]) -> list[dict[str, Any]]:
-    """Вытаскиваем items из state — структура у Avito гуляет, ищем рекурсивно."""
-    # типичный путь: state.items.catalog или state.search.results
-    for path in [
-        ("items", "catalog"),
-        ("search", "results"),
-        ("catalog", "items"),
-        ("singleCard", "items"),
-    ]:
-        cursor: Any = state
-        for key in path:
-            if not isinstance(cursor, dict):
-                cursor = None
-                break
-            cursor = cursor.get(key)
-        if isinstance(cursor, list) and cursor:
-            return cursor
-    return []
diff --git a/tradein-mvp/backend/app/services/scrapers/base.py b/tradein-mvp/backend/app/services/scrapers/base.py
index ace1637a..76b3f165 100644
--- a/tradein-mvp/backend/app/services/scrapers/base.py
+++ b/tradein-mvp/backend/app/services/scrapers/base.py
@@ -77,6 +77,12 @@ class ScrapedLot(BaseModel):
     has_balcony: bool | None = None
     kadastr_num: str | None = None
 
+    # Avito house linking (Stage 2a — search → houses)
+    house_source: str | None = None        # 'avito' / 'cian'
+    house_ext_id: str | None = None        # Avito's '3171365'
+    house_url: str | None = None           # full URL of /catalog/houses/...
+    listing_segment: str | None = None     # 'vtorichka' / 'novostroyki'
+
     # Цена (обязательно)
     price_rub: int = Field(gt=0)
     price_per_m2: int | None = None
@@ -199,6 +205,7 @@ def save_listings(db: Session, lots: list[ScrapedLot]) -> tuple[int, int]:
                     address, lat, lon, region_code,
                     rooms, area_m2, floor, total_floors, year_built,
                     house_type, repair_state, has_balcony, kadastr_num,
+                    house_source, house_ext_id, house_url, listing_segment,
                     price_rub, price_per_m2,
                     listing_date, days_on_market, photo_urls, raw_payload,
                     scraped_at, last_seen_at
@@ -207,6 +214,7 @@ def save_listings(db: Session, lots: list[ScrapedLot]) -> tuple[int, int]:
                     :address, :lat, :lon, 66,
                     :rooms, :area_m2, :floor, :total_floors, :year_built,
                     :house_type, :repair_state, :has_balcony, :kadastr,
+                    :house_source, :house_ext_id, :house_url, :listing_segment,
                     :price_rub, :ppm2,
                     :listing_date, :days_on_market,
                     CAST(:photos AS jsonb),
@@ -239,6 +247,10 @@ def save_listings(db: Session, lots: list[ScrapedLot]) -> tuple[int, int]:
                 "repair_state": lot.repair_state,
                 "has_balcony": lot.has_balcony,
                 "kadastr": lot.kadastr_num,
+                "house_source": lot.house_source,
+                "house_ext_id": lot.house_ext_id,
+                "house_url": lot.house_url,
+                "listing_segment": lot.listing_segment,
                 "price_rub": lot.price_rub,
                 "ppm2": ppm2,
                 "listing_date": lot.listing_date,
-- 
2.45.3