term.h

/*
 * This file is part of the KDE Akonadi Search Project
 * SPDX-FileCopyrightText: 2013 Vishesh Handa <me@vhanda.in>
 *
 * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 *
 */
 
#pragma once
 
#include "search_core_export.h"
 
#include <QDebug>
#include <QString>
#include <QVariant>
 
#include <memory>
 
namespace Akonadi
{
namespace Search
{
class TermPrivate;
 
/** Search term. */
class AKONADI_SEARCH_CORE_EXPORT Term
{
public:
    enum Comparator {
        Auto,
        Equal,
        Contains,
        Greater,
        GreaterEqual,
        Less,
        LessEqual
    };
 
    enum Operation {
        None,
        And,
        Or
    };
 
    Term();
    Term(const Term &t);
 
    /**
     * The Item must contain the property \p property
     */
    Term(const QString &property);
 
    /**
     * The Item must contain the property \p property with
     * value \value.
     *
     * The default comparator is Auto which has the following behavior
     * For Strings - Contains
     * For DateTime - Contains
     * For any other type - Equals
     */
    Term(const QString &property, const QVariant &value, Comparator c = Auto);
 
    /**
     * This term is a combination of other terms
     */
    Term(Operation op);
    Term(Operation op, const Term &t);
    Term(Operation op, const QList<Term> &t);
    Term(const Term &lhs, Operation op, const Term &rhs);
    ~Term();
 
    [[nodiscard]] bool isValid() const;
 
    /**
     * Negate this term. Negation only applies for Equal or Contains
     * For other Comparators you must invert it yourself
     */
    void setNegation(bool isNegated);
 
    [[nodiscard]] bool negated() const;
    [[nodiscard]] bool isNegated() const;
 
    void addSubTerm(const Term &term);
    void setSubTerms(const QList<Term> &terms);
 
    /**
     * Returns the first subTerm in the list of subTerms
     */
    [[nodiscard]] Term subTerm() const;
    [[nodiscard]] QList<Term> subTerms() const;
 
    void setOperation(Operation op);
    [[nodiscard]] Operation operation() const;
 
    [[nodiscard]] bool isEmpty() const;
    [[nodiscard]] bool empty() const;
 
    /**
     * Return the property this term is targeting
     */
    [[nodiscard]] QString property() const;
    void setProperty(const QString &property);
 
    [[nodiscard]] QVariant value() const;
    void setValue(const QVariant &value);
 
    [[nodiscard]] Comparator comparator() const;
    void setComparator(Comparator c);
 
    void setUserData(const QString &name, const QVariant &value);
    [[nodiscard]] QVariant userData(const QString &name) const;
 
    [[nodiscard]] QVariantMap toVariantMap() const;
    static Term fromVariantMap(const QVariantMap &map);
 
    bool operator==(const Term &rhs) const;
 
    Term &operator=(const Term &rhs);
 
private:
    std::unique_ptr<TermPrivate> const d;
};
 
inline Term operator&&(const Term &lhs, const Term &rhs)
{
    Term t(Term::And);
    t.addSubTerm(lhs);
    t.addSubTerm(rhs);
    return t;
}
 
inline Term operator||(const Term &lhs, const Term &rhs)
{
    Term t(Term::Or);
    t.addSubTerm(lhs);
    t.addSubTerm(rhs);
    return t;
}
 
inline Term operator!(const Term &rhs)
{
    Term t(rhs);
    t.setNegation(!rhs.isNegated());
    return t;
}
}
}
 
AKONADI_SEARCH_CORE_EXPORT QDebug operator<<(QDebug d, const Akonadi::Search::Term &t);