233 lines
7.3 KiB
Python
233 lines
7.3 KiB
Python
# scraper.py
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from sqlalchemy.orm import Session
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from database import InstagramAccount, InstagramPost
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from utils.boxapi_client import get_media_page, BoxAPIError
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from utils.parser_fast import parse_boxapi_items_fast
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from utils.s3_uploader import (
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upload_media_from_url,
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upload_image_from_url_optimized,
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upload_video_from_url_optimized,
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)
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from schemas import ScrapeRequest, ScrapedPost
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from typing import List, Dict, Any, Optional, Set
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from datetime import datetime
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from scraper_cursor import get_cursor, set_cursor
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# Safety cap for very large accounts
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MAX_PAGES = 500 # adjust if needed
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def _ig_id_of(it: Dict[str, Any]) -> Optional[str]:
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v = it.get("id") or it.get("pk")
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return str(v) if v is not None else None
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def _db_existing_ids(db: Session, ids: List[str]) -> Set[str]:
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if not ids:
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return set()
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rows = (
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db.query(InstagramPost.ig_post_id)
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.filter(InstagramPost.ig_post_id.in_(ids))
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.all()
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)
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return {r[0] for r in rows}
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def _collect_raw_to_save(
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db: Session,
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username: str,
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needed: int,
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stored_cursor: Optional[str],
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since_ts: Optional[int],
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) -> tuple[List[Dict[str, Any]], Optional[str]]:
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"""
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Keep fetching pages until we have `needed` posts that are NOT in DB.
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Return (raw_items_to_save, final_cursor).
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"""
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to_save_raw: List[Dict[str, Any]] = []
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pages = 0
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cursor = stored_cursor
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first = True
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last_seen_cursor: Optional[str] = stored_cursor
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while len(to_save_raw) < needed and pages < MAX_PAGES:
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max_id = None if first else cursor
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count = min(12, needed - len(to_save_raw)) or 12
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try:
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page, _log, next_id = get_media_page(username=username, count=count, max_id=max_id)
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except BoxAPIError:
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break
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pages += 1
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last_seen_cursor = next_id
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if not page:
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break
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# Optional: since_taken_at filter (raw, cheap)
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filtered = []
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ids_in_order: List[str] = []
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for it in page:
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igid = _ig_id_of(it)
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if not igid:
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continue
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if since_ts is not None:
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ts = it.get("taken_at") or it.get("timestamp")
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try:
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ts = int(ts) if ts is not None else None
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except Exception:
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ts = None
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if ts is not None and ts <= since_ts:
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continue
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filtered.append(it)
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ids_in_order.append(igid)
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if not ids_in_order:
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if not next_id:
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break
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first = False
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cursor = next_id
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continue
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# DB check: keep only items not yet saved
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already = _db_existing_ids(db, ids_in_order)
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for it in filtered:
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igid = _ig_id_of(it)
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if igid and igid not in already:
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to_save_raw.append(it)
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if len(to_save_raw) >= needed:
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break
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if not next_id:
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break
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first = False
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cursor = next_id
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return to_save_raw, last_seen_cursor
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def scrape_and_store(db: Session, req: ScrapeRequest) -> List[ScrapedPost]:
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target = int(req.max_count)
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# Optional since_taken_at
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since_ts: Optional[int] = None
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if hasattr(req, "since_taken_at") and req.since_taken_at is not None:
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try:
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since_ts = int(req.since_taken_at)
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except Exception:
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since_ts = None
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# Start from stored backfill cursor (if any), but always try newest page first
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stored_cursor = get_cursor(db, req.username)
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# 1) Collect raw items to save (NOT in DB), paging as deep as needed
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raw_to_save, final_cursor = _collect_raw_to_save(
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db=db,
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username=req.username,
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needed=target,
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stored_cursor=stored_cursor,
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since_ts=since_ts,
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)
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# Persist traversal progress (so next run can continue deeper)
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set_cursor(db, req.username, final_cursor)
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if not raw_to_save:
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return []
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# 2) Normalize only what we intend to save
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normalized = parse_boxapi_items_fast(raw_to_save)[:target]
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# 3) Ensure account row
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account = db.query(InstagramAccount).filter_by(username=req.username).first()
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if not account:
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account = InstagramAccount(
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username=req.username,
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seller_id=req.seller_id,
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is_active=True,
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last_synced=None
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)
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db.add(account)
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db.commit()
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db.refresh(account)
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# 4) Upload + save
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result: List[ScrapedPost] = []
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for item in normalized:
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post_id = str(item["ig_post_id"])
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seller_id = str(req.seller_id)
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# DB guard (rare race)
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if db.query(InstagramPost).filter_by(ig_post_id=post_id).first():
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continue
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media_urls = list(item.get("remote_urls", []))
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# If video, keep only actual video URLs (avoid thumbnail)
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if item["media_type"] == "video":
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thumb = (item.get("thumbnail_url") or "").strip()
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def is_video(u: str) -> bool:
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base = u.split("?", 1)[0].lower()
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return base.endswith((".mp4", ".mov", ".m4v", ".webm"))
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media_urls = [u for u in media_urls if is_video(u) and u != thumb]
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uploaded_urls: List[str] = []
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for remote_url in media_urls:
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try:
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if item["media_type"] == "video":
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url = upload_video_from_url_optimized(remote_url, seller_id, post_id)
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elif item["media_type"] in ("image", "carousel"):
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url = upload_image_from_url_optimized(remote_url, seller_id, post_id)
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if url is None:
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url = upload_media_from_url(remote_url, seller_id, post_id)
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else:
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url = upload_media_from_url(remote_url, seller_id, post_id)
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if url:
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uploaded_urls.append(url)
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except Exception as e:
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print(f"⚠️ Error uploading media: {e}")
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continue
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final_thumbnail = item.get("thumbnail_url") or None
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if final_thumbnail:
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try:
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thumb_url = upload_image_from_url_optimized(final_thumbnail, seller_id, post_id)
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if thumb_url:
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final_thumbnail = thumb_url
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else:
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alt = upload_media_from_url(final_thumbnail, seller_id, post_id)
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if alt:
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final_thumbnail = alt
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except Exception as e:
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print(f"⚠️ Failed to upload thumbnail: {e}")
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created_at = datetime.fromtimestamp(item["taken_at"]) if item.get("taken_at") else datetime.utcnow()
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post_entry = InstagramPost(
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ig_post_id=post_id,
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account_id=account.id,
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media_type=item["media_type"],
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caption=item.get("caption"),
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thumbnail_url=final_thumbnail,
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local_media=uploaded_urls,
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created_at=created_at,
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)
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db.add(post_entry)
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db.commit()
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result.append(ScrapedPost(
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ig_post_id=post_id,
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media_type=item["media_type"],
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caption=item.get("caption"),
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thumbnail_url=final_thumbnail,
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local_media=uploaded_urls,
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created_at=created_at,
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))
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if len(result) >= target:
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break
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return result
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