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FabledCurator/backend/app/models/import_settings.py
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bvandeusen c0fd80e694
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feat(series): assisted-continuation matcher + suggestion queue — backend (FC-6.3)
Confirm-only "this post may continue this series" matcher.

- series_suggestion table (post_id, series_tag_id, score, signals jsonb, status
  pending|added|dismissed, UNIQUE(post,series)); migration 0041 + two settings
  knobs (series_suggest_enabled, series_suggest_threshold).
- series_match_service: weighted additive score (title-stem / same-artist /
  page-continuity / shared-distinctive-tags), no single signal gating. The title
  "pattern" is derived on the fly from the post titles already in a series, so it
  sharpens as more are confirmed (no persisted state to drift). Candidates are
  bounded to the post's artist. match_post upserts pending suggestions (UNIQUE +
  on-conflict, respecting prior added/dismissed decisions).
- accept reuses add_post_as_chapter then marks 'added'; dismiss marks 'dismissed'.
- rescan_series_suggestions_task: settings-gated, time-boxed + self-resuming from
  a post-id cursor (maintenance_long lane), like normalize_tags_task.
- API: GET /series/suggestions, POST .../<id>/accept|dismiss, POST .../rescan.
- Settings: enabled + threshold exposed via /settings/import.
- Tests: pure scoring helpers + matcher/accept/dismiss/rescan lifecycle + UNIQUE
  dedup.

Frontend (Suggestions tab + settings card) lands next.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-07 18:58:18 -04:00

85 lines
3.4 KiB
Python

"""ImportSettings — single-row table holding the importer's tunable knobs.
Enforced as a single row via a CHECK (id = 1) constraint. The application
always SELECTs id=1 and never inserts/deletes after the initial migration.
"""
from sqlalchemy import Boolean, CheckConstraint, Float, Integer, Text, select
from sqlalchemy.orm import Mapped, mapped_column
from .base import Base
class ImportSettings(Base):
__tablename__ = "import_settings"
# Bare constraint name — Base.metadata's naming convention applies the
# ck_<table>_<name> prefix, producing the final ck_import_settings_singleton.
__table_args__ = (CheckConstraint("id = 1", name="singleton"),)
id: Mapped[int] = mapped_column(Integer, primary_key=True)
import_scan_path: Mapped[str] = mapped_column(Text, nullable=False, default="/import")
min_width: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
min_height: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
skip_transparent: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
transparency_threshold: Mapped[float] = mapped_column(Float, nullable=False, default=0.9)
skip_single_color: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
single_color_threshold: Mapped[float] = mapped_column(Float, nullable=False, default=0.95)
single_color_tolerance: Mapped[int] = mapped_column(Integer, nullable=False, default=30)
phash_threshold: Mapped[int] = mapped_column(Integer, nullable=False, default=10)
# FC-3c downloader knobs
download_rate_limit_seconds: Mapped[float] = mapped_column(
Float, nullable=False, default=3.0
)
download_validate_files: Mapped[bool] = mapped_column(
Boolean, nullable=False, default=True
)
# FC-3d scheduling knobs
download_schedule_default_seconds: Mapped[int] = mapped_column(
Integer, nullable=False, default=28800
)
download_event_retention_days: Mapped[int] = mapped_column(
Integer, nullable=False, default=90
)
download_failure_warning_threshold: Mapped[int] = mapped_column(
Integer, nullable=False, default=5
)
# FC-3h backup knobs.
backup_db_nightly_enabled: Mapped[bool] = mapped_column(
Boolean, nullable=False, default=False,
)
backup_db_nightly_hour_utc: Mapped[int] = mapped_column(
Integer, nullable=False, default=3,
)
backup_db_keep_last_n: Mapped[int] = mapped_column(
Integer, nullable=False, default=14,
)
backup_images_keep_last_n: Mapped[int] = mapped_column(
Integer, nullable=False, default=3,
)
# FC-6.3 series continuation matcher. enabled gates the rescan; threshold is
# the weighted-score cut-off (0..1) above which a pending suggestion is made.
series_suggest_enabled: Mapped[bool] = mapped_column(
Boolean, nullable=False, default=True,
)
series_suggest_threshold: Mapped[float] = mapped_column(
Float, nullable=False, default=0.5,
)
@classmethod
async def load(cls, session) -> ImportSettings:
"""The singleton settings row (id=1), via an async session."""
return (await session.execute(select(cls).where(cls.id == 1))).scalar_one()
@classmethod
def load_sync(cls, session) -> ImportSettings:
"""The singleton settings row (id=1), via a sync session."""
return session.execute(select(cls).where(cls.id == 1)).scalar_one()