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core/include/structive/property/validation.hpp

@@ -0,0 +1,30 @@
+#pragma once
+#include "schema.hpp"
+#include <optional>
+#include <string_view>
+#include <type_traits>
+namespace structive {
+struct Validation_Error {
+    std::string_view property_key;
+    std::string_view code;
+};
+template <Valid_Property_Schema Schema, std::size_t Index, class Value>
+std::optional<Validation_Error> validate_property_value(const Schema& schema, const Value& value) {
+    std::optional<Validation_Error> error;
+    schema.template property<Index>().for_each_constraint([&](const auto& constraint_value) {
+        if (!error && !static_cast<bool>(constraint_value.validate(value))) {
+            using constraint_type = std::remove_cvref_t<decltype(constraint_value)>;
+            error = Validation_Error{declared_property_key<typename Schema::template property_type<Index>>(), constraint_type::code.view()};
+        }
+    });
+    return error;
+}
+template <auto Member, Valid_Property_Schema Schema, class Value>
+std::optional<Validation_Error> validate_property_value(const Schema& schema, const Value& value) requires Schema_Property_Member<Schema, Member> {
+    return validate_property_value<Schema, schema_member_property_index_v<Schema, Member>>(schema, value);
+}
+template <Fixed_String Key, Valid_Property_Schema Schema, class Value>
+std::optional<Validation_Error> validate_property_key_value(const Schema& schema, const Value& value) requires Schema_Property_Key<Schema, Key> {
+    return validate_property_value<Schema, schema_property_index_v<Schema, Key>>(schema, value);
+}
+}