feat: Port get_allowed_object_conditions() from Golang to Python (#369)

Author: LeTeddy

casbin/enforcer.py

@@ -335,3 +335,22 @@ def get_implicit_users_for_resource_by_domain(self, resource, domain):
 
         permissions = [list(t) for t in (list(key) for key in permissions.keys())]
         return permissions
+
+    def get_allowed_object_conditions(self, user, action, prefix):
+        """
+        GetAllowedObjectConditions returns a string array of object conditions that the user can access.
+        """
+        Permissions = self.get_implicit_permissions_for_user(user)
+
+        object_conditions = []
+
+        for policy in Permissions:
+            if policy[2] == action:
+                if not policy[1].startswith(prefix):
+                    return None
+                object_conditions.append(policy[1].removeprefix(prefix))
+
+        if len(object_conditions) == 0:
+            return None
+
+        return object_conditions