Update validation_engine.py

validation_engine.py

@@ -1,25 +1,41 @@
 """
-Flare – Parameter Validation
+Flare – Parameter Validation (with date support)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Basit tip + regex kontrolü; Spark veya harici lib ile zenginleştirilebilir.
 """
 
 import re
 from typing import Any
+from datetime import datetime
 from config_provider import ParameterConfig
 
 def validate(value: str, param: ParameterConfig) -> bool:
     t = param.canonical_type()
+    
     if t == "int":
-        if not value.isdigit(): return False
+        if not value.isdigit(): 
+            return False
     elif t == "float":
-        try: float(value)
-        except ValueError: return False
+        try: 
+            float(value)
+        except ValueError: 
+            return False
     elif t in ("str", "string"):
-        pass
+        pass  # All strings are valid
     elif t == "bool":
-        if value.lower() not in ("true","false","1","0","evet","hayır"): return False
+        if value.lower() not in ("true","false","1","0","evet","hayır"): 
+            return False
+    
+    # Special handling for date type
+    if param.type == "date":
+        try:
+            # Check if it's a valid ISO date format (YYYY-MM-DD)
+            datetime.strptime(value, "%Y-%m-%d")
+        except ValueError:
+            return False
 
+    # Regex validation if provided
     if param.validation_regex and not re.fullmatch(param.validation_regex, value, re.I):
         return False
+        
     return True