validatorrule.h

/*
 * SPDX-FileCopyrightText: (C) 2017-2023 Matthias Fehring <mf@huessenbergnetz.de>
 * SPDX-License-Identifier: BSD-3-Clause
 */
#ifndef CUTELYSTVALIDATORRULE_H
#define CUTELYSTVALIDATORRULE_H
 
#include <Cutelyst/cutelyst_global.h>
#include <Cutelyst/paramsmultimap.h>
 
#include <QLoggingCategory>
#include <QScopedPointer>
#include <QVariant>
 
Q_DECLARE_LOGGING_CATEGORY(C_VALIDATOR)
 
namespace Cutelyst {
 
class Context;
 
struct CUTELYST_PLUGIN_UTILS_VALIDATOR_EXPORT ValidatorReturnType {
    QString errorMessage; 
    QVariant value;       
    QVariant extra; 
    explicit operator bool() const noexcept { return errorMessage.isNull(); }
 
    [[nodiscard]] bool isValid() const noexcept { return errorMessage.isNull(); }
};
 
struct CUTELYST_PLUGIN_UTILS_VALIDATOR_EXPORT ValidatorMessages {
    ValidatorMessages() = default;
    ValidatorMessages(const char *customLabel,
                      const char *customValidationError     = nullptr,
                      const char *customParsingError        = nullptr,
                      const char *customValidationDataError = nullptr)
        : label(customLabel)
        , validationError(customValidationError)
        , parsingError(customParsingError)
        , validationDataError(customValidationDataError)
    {
    }
    const char *label = nullptr; 
    const char *validationError     = nullptr; 
    const char *parsingError        = nullptr; 
    const char *validationDataError = nullptr; 
};
 
class ValidatorRulePrivate;
 
class CUTELYST_PLUGIN_UTILS_VALIDATOR_EXPORT ValidatorRule
{
public:
    ValidatorRule(const QString &field,
                  const ValidatorMessages &messages = ValidatorMessages(),
                  const QString &defValKey          = QString(),
                  QByteArrayView validatorName      = nullptr);
 
    virtual ~ValidatorRule();
 
protected:
    // shared d-pointer
    // NOLINTNEXTLINE(cppcoreguidelines-non-private-member-variables-in-classes)
    const std::unique_ptr<ValidatorRulePrivate> d_ptr;
    ValidatorRule(ValidatorRulePrivate &dd);
 
    virtual ValidatorReturnType validate(Context *c, const ParamsMultiMap &params) const = 0;
 
    [[nodiscard]] QString field() const noexcept;
 
    [[nodiscard]] QString label(Context *c) const;
 
    [[nodiscard]] QString value(const ParamsMultiMap &params) const;
 
    [[nodiscard]] bool trimBefore() const noexcept;
 
    [[nodiscard]] QString validationError(Context *c, const QVariant &errorData = QVariant()) const;
 
    virtual QString genericValidationError(Context *c,
                                           const QVariant &errorData = QVariant()) const;
 
    [[nodiscard]] QString parsingError(Context *c, const QVariant &errorData = QVariant()) const;
 
    virtual QString genericParsingError(Context *c, const QVariant &errorData = QVariant()) const;
 
    [[nodiscard]] QString validationDataError(Context *c,
                                              const QVariant &errorData = QVariant()) const;
 
    virtual QString genericValidationDataError(Context *c,
                                               const QVariant &errorData = QVariant()) const;
 
    void defaultValue(Context *c, ValidatorReturnType *result) const;
 
    [[nodiscard]] QString debugString(Context *c) const;
 
private:
    Q_DECLARE_PRIVATE(ValidatorRule) // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
    Q_DISABLE_COPY(ValidatorRule)
 
    void setTranslationContext(QLatin1String trContext) noexcept;
 
    void setTrimBefore(bool trimBefore) noexcept;
 
    friend class Validator;
    friend class ValidatorPrivate;
};
 
} // namespace Cutelyst
 
#endif // CUTELYSTVALIDATORRULE_H