Upload validation.py

app/utils/validation.py

@@ -0,0 +1,40 @@
+import re
+from typing import Any
+
+_TAG_RE = re.compile(r"^[A-Za-z0-9_\-]{1,64}$")
+_DATASET_RE = re.compile(r"^[A-Za-z0-9_.\-]+\/[A-Za-z0-9_.\-]+$|^[A-Za-z0-9_.\-]+$")
+
+class ValidationError(ValueError):
+    pass
+
+def safe_tag(s: str) -> str:
+    if not isinstance(s, str):
+        raise ValidationError("Experiment tag must be a string")
+    if not _TAG_RE.match(s):
+        raise ValidationError("Experiment tag must be 1–64 chars: letters, numbers, _ or -")
+    return s
+
+def safe_dataset_id(s: str) -> str:
+    if not isinstance(s, str):
+        raise ValidationError("Dataset id must be a string")
+    if not _DATASET_RE.match(s):
+        raise ValidationError("Dataset must look like 'owner/name' or a public name")
+    return s
+
+def safe_float(x: Any, lo: float, hi: float, name: str) -> float:
+    try:
+        v = float(x)
+    except Exception:
+        raise ValidationError(f"{name} must be a number")
+    if not (lo <= v <= hi):
+        raise ValidationError(f"{name} must be in [{lo}, {hi}]")
+    return v
+
+def safe_int(x: Any, lo: int, hi: int, name: str) -> int:
+    try:
+        v = int(x)
+    except Exception:
+        raise ValidationError(f"{name} must be an integer")
+    if not (lo <= v <= hi):
+        raise ValidationError(f"{name} must be in [{lo}, {hi}]")
+    return v