Add multi-league foundation

app/league_context.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+import re
+from typing import Optional
+
+from sqlalchemy.orm import Session
+
+from .models import League, QRCode
+
+DEFAULT_LEAGUE_NAME = "Default League"
+DEFAULT_LEAGUE_SLUG = "default"
+
+
+def slugify(value: str) -> str:
+    slug = re.sub(r"[^a-z0-9]+", "-", value.lower()).strip("-")
+    return slug or DEFAULT_LEAGUE_SLUG
+
+
+def get_default_league(db: Session) -> League:
+    league = db.query(League).filter(League.slug == DEFAULT_LEAGUE_SLUG).first()
+    if league:
+        return league
+
+    league = db.query(League).order_by(League.id).first()
+    if league:
+        return league
+
+    league = League(
+        name=DEFAULT_LEAGUE_NAME,
+        slug=DEFAULT_LEAGUE_SLUG,
+        description="Default league for existing LeagueLedger data.",
+        publisher_name="LeagueLedger",
+        is_active=True,
+    )
+    db.add(league)
+    db.commit()
+    db.refresh(league)
+    return league
+
+
+def get_active_leagues(db: Session):
+    leagues = db.query(League).filter(League.is_active == True).order_by(League.name).all()
+    if leagues:
+        return leagues
+    return [get_default_league(db)]
+
+
+def parse_league_id(value) -> Optional[int]:
+    try:
+        return int(value) if value else None
+    except (TypeError, ValueError):
+        return None
+
+
+def resolve_selected_league(db: Session, league_id: Optional[int]) -> League:
+    if league_id:
+        league = db.query(League).filter(League.id == league_id, League.is_active == True).first()
+        if league:
+            return league
+    return get_default_league(db)
+
+
+def qr_code_league_id(qr_code: QRCode) -> Optional[int]:
+    if qr_code.league_id:
+        return qr_code.league_id
+    if qr_code.qr_set and qr_code.qr_set.league_id:
+        return qr_code.qr_set.league_id
+    if qr_code.event and qr_code.event.league_id:
+        return qr_code.event.league_id
+    return None