Initial commit

app/validation.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from fastapi import HTTPException
+
+
+def parse_positive_int_ids(value, field_name: str = "ids") -> list[int]:
+    detail = f"{field_name} must be a list of positive integers"
+    if not isinstance(value, list):
+        raise HTTPException(status_code=400, detail=detail)
+    ids: list[int] = []
+    for item in value:
+        if isinstance(item, bool):
+            raise HTTPException(status_code=400, detail=detail)
+        if isinstance(item, int):
+            item_id = item
+        elif isinstance(item, str) and item.isdecimal():
+            item_id = int(item)
+        else:
+            raise HTTPException(status_code=400, detail=detail)
+        if item_id <= 0:
+            raise HTTPException(status_code=400, detail=detail)
+        ids.append(item_id)
+    return ids