Create validators.py

utils/validators.py

@@ -0,0 +1,47 @@
+"""
+Validation utilities for model card inputs
+"""
+
+import re
+
+def validate_mmcid(mmcid):
+    """
+    Validate MMCID format: DF-MC-YYYY-NNN
+    
+    Args:
+        mmcid: String to validate
+    
+    Returns:
+        Boolean indicating if format is valid
+    
+    Examples:
+        DF-MC-2025-001 ✓
+        DF-MC-2024-123 ✓
+        df-mc-2025-001 ✗ (wrong case)
+        DF-MC-25-001 ✗ (year must be 4 digits)
+    """
+    if not mmcid:
+        return True  # Empty is valid (optional field)
+    
+    pattern = r'^DF-MC-\d{4}-\d{3}$'
+    return bool(re.match(pattern, mmcid))
+
+
+def validate_controlled_vocab_selection(selections, max_items=3):
+    """
+    Validate that multi-select doesn't exceed max items
+    
+    Args:
+        selections: List of selected items
+        max_items: Maximum allowed selections (default 3)
+    
+    Returns:
+        Tuple of (is_valid, error_message)
+    """
+    if not selections:
+        return True, None
+    
+    if len(selections) > max_items:
+        return False, f"Please select no more than {max_items} items"
+    
+    return True, None