Levels

membership/config/settings.py

@@ -118,6 +118,7 @@ MEMBERSHIP_TIERS = json.loads(os.environ["MEMBERSHIP_TIERS_JSON"]) if "MEMBERSHI
 if not isinstance(MEMBERSHIP_TIERS, dict):
     raise ImproperlyConfigured("MEMBERSHIP_TIERS_JSON must be an object.")
 prices = set()
+levels = set()
 for key, tier in MEMBERSHIP_TIERS.items():
     if not re.fullmatch(r"[a-z0-9][a-z0-9_-]{0,47}", key) or not isinstance(tier, dict):
         raise ImproperlyConfigured("Invalid membership tier.")
@@ -127,6 +128,10 @@ for key, tier in MEMBERSHIP_TIERS.items():
     if not tier["price_id"].startswith("price_") or tier["price_id"] in prices:
         raise ImproperlyConfigured("Each tier must have a unique Stripe Price ID.")
     prices.add(tier["price_id"])
+    level = tier.get("level")
+    if not isinstance(level, int) or isinstance(level, bool) or level < 1 or level in levels:
+        raise ImproperlyConfigured(f"Tier {key} must have a unique positive integer level; level 0 is reserved for free accounts.")
+    levels.add(level)
     if "usd_amount" in tier:
         try:
             amount = Decimal(tier["usd_amount"])