91 lines
3.4 KiB
Python
91 lines
3.4 KiB
Python
"""Listing expiry warning and expired notification emails.
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Two sweeps (called from nightly systemd timer):
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- warn_expiring(days=3): send one warning email per listing expiring within N days
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that hasn't already received one.
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- notify_expired(): send "your listing expired" email for newly-expired listings
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that haven't been notified yet.
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We track state via a JSON field on the listing. Rather than adding columns, we
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use the existing `attributes` JSON and a private `_notified` sub-key so no migration
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is required. The key is prefixed with `_` to avoid colliding with user attributes.
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"""
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from datetime import datetime, timedelta
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from app.utils.time import utcnow
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from flask import current_app
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from app.extensions import db
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from app.models.listing import Listing
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from app.models.enums import ListingStatus
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from app.services.email import send_email
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def _already_notified(listing, key: str) -> bool:
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attrs = listing.attributes or {}
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return bool(attrs.get(key))
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def _mark_notified(listing, key: str):
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attrs = dict(listing.attributes or {})
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attrs[key] = utcnow().isoformat()
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listing.attributes = attrs
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def warn_expiring(days: int = 3) -> int:
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"""Send warning emails for listings expiring within `days` days. Returns count."""
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now = utcnow()
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window_end = now + timedelta(days=days)
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soon = (Listing.query
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.filter(Listing.status == ListingStatus.active,
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Listing.expires_at > now,
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Listing.expires_at <= window_end)
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.all())
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sent = 0
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for listing in soon:
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if _already_notified(listing, "_warn_sent"):
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continue
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user = listing.user
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if not user or not user.email:
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continue
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days_left = (listing.expires_at - now).days
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subject = f"Your listing '{listing.title[:50]}' expires in {days_left} day(s)"
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body = (
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f"Hi {user.display_name},\n\n"
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f"Your listing \"{listing.title}\" will expire in {days_left} day(s) "
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f"({listing.expires_at.strftime('%Y-%m-%d')}).\n\n"
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f"To keep it active, edit and re-save it, or purchase a boost.\n\n"
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f"View your listing: {current_app.config.get('SERVER_NAME', '')}/listings/{listing.id}\n\n"
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f"— Classifieds"
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)
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if send_email(user.email, subject, body):
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_mark_notified(listing, "_warn_sent")
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db.session.commit()
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sent += 1
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return sent
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def notify_expired() -> int:
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"""Send 'your listing expired' emails for newly-expired listings. Returns count."""
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expired = (Listing.query
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.filter(Listing.status == ListingStatus.expired)
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.all())
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sent = 0
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for listing in expired:
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if _already_notified(listing, "_expired_sent"):
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continue
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user = listing.user
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if not user or not user.email:
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continue
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subject = f"Your listing '{listing.title[:50]}' has expired"
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body = (
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f"Hi {user.display_name},\n\n"
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f"Your listing \"{listing.title}\" expired on "
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f"{listing.expires_at.strftime('%Y-%m-%d')}.\n\n"
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f"To re-list it, create a new listing or upgrade your plan for longer listing life.\n\n"
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f"— Classifieds"
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)
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if send_email(user.email, subject, body):
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_mark_notified(listing, "_expired_sent")
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db.session.commit()
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sent += 1
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return sent
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