draconisplusplus/include/rfl/PatternValidator.hpp

#ifndef RFL_PATTERNVALIDATOR_HPP_
#define RFL_PATTERNVALIDATOR_HPP_

#include <string>

#include "../ctre.hpp"
#include "Literal.hpp"
#include "Result.hpp"
#include "internal/StringLiteral.hpp"
#include "parsing/schema/ValidationType.hpp"

namespace rfl {

  template <internal::StringLiteral _regex, internal::StringLiteral _name>
  struct PatternValidator {
    using Name  = Literal<_name>;
    using Regex = Literal<_regex>;

    static Result<std::string> validate(const std::string& _str) noexcept {
      if (ctre::match<_regex.arr_>(_str)) {
        return _str;
      } else {
        return rfl::Error(
          "String '" + _str + "' did not match format '" + _name.str() + "': '" + _regex.str() +
          "'."
        );
      }
    }

    template <class T>
    static parsing::schema::ValidationType to_schema() {
      using ValidationType = parsing::schema::ValidationType;
      return ValidationType { ValidationType::Regex { .pattern_ = Regex().str() } };
    }
  };

} // namespace rfl

#endif