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#include "id.h"
#include "coreconstants.h"
#include "icontext.h"

#include <QtCore/QHash>

namespace Core {

/*!
    \class Core::Id

    \brief The class Id encapsulates an identifier. It is used as a type-safe
    helper class instead of a \c QString or \c QByteArray. The internal
    representation of the id is assumed to be plain 7-bit-clean ASCII.

*/

uint qHash(const Core::Id &id) { return qHash(id.name()); }

static QHash<Core::Id, int> &theUniqueIdentifiers()
{
    static QHash<Core::Id, int> data;
    return data;
}

int Id::uniqueIdentifier() const
{
    if (theUniqueIdentifiers().contains(*this))
        return theUniqueIdentifiers().value(*this);

    const int uid = theUniqueIdentifiers().count() + 1;
    theUniqueIdentifiers().insert(*this, uid);
    return uid;
}

Id Id::fromUniqueIdentifier(int uid)
{
    return theUniqueIdentifiers().key(uid);
}

Context::Context(const char *id, int offset)
{
    d.append(Id(QString(id) + QString::number(offset)).uniqueIdentifier());
}

void Context::add(const char *id)
{
    d.append(Id(id).uniqueIdentifier());
}

bool Context::contains(const char *id) const
{
    return d.contains(Id(id).uniqueIdentifier());
}

} // namespace Core