// Copyright (C) 2026 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include "qversitcontactimporter.h"
#include "qversitcontactimporter_p.h"

QT_BEGIN_NAMESPACE_VERSIT

// Out-of-line destructors to anchor the vtables (avoids -Wweak-vtables).
QVersitContactImporterPropertyHandler::~QVersitContactImporterPropertyHandler() = default;
QVersitContactImporterPropertyHandlerV2::~QVersitContactImporterPropertyHandlerV2() = default;

/*!
  \deprecated
  \class QVersitContactImporterPropertyHandler
  \brief The QVersitContactImporterPropertyHandler class is the legacy interface for specifying
  custom import behaviour for vCard properties.

  This interface is replaced by QVersitContactImporterPropertyHandlerV2.  For general information on
  extending Qt Versit, see the document on \l{Qt Versit Plugins}.

  \sa QVersitContactImporter
 */

/*!
  \fn QVersitContactImporterPropertyHandler::~QVersitContactImporterPropertyHandler()
  Frees any memory in use by this handler.
 */

/*!
  \fn bool QVersitContactImporterPropertyHandler::preProcessProperty(const QVersitDocument& document, const QVersitProperty& property, int contactIndex, QContact* contact)
  Process \a property and update \a contact with the corresponding QContactDetail(s).
  \a document provides the context within which the property was found.
  \a contactIndex specifies the position that \a contact will take in the list returned by
  \l QVersitContactImporter::importDocuments().

  Returns true if the property has been handled and requires no further processing, false
  otherwise.

  This function is called on every QVersitProperty encountered during an import.  Supply this
  function and return true to implement custom import behaviour.
 */

/*!
  \fn bool QVersitContactImporterPropertyHandler::postProcessProperty(const QVersitDocument& document, const QVersitProperty& property, bool alreadyProcessed, int contactIndex, QContact* contact)
  Process \a property and update \a contact with the corresponding QContactDetail(s).
  \a document provides the context within which the property was found.
  \a contactIndex specifies the position that \a contact will take in the list returned by
  \l QVersitContactImporter::importDocuments().
  \a alreadyProcessed is true if the detail has already been processed either by
  \l preProcessProperty() or by QVersitContactImporter itself.

  Returns true if the property has been handled, false otherwise.

  This function is called on every QVersitProperty encountered during an import.  This can be
  used to implement support for vCard properties not supported by QVersitContactImporter.
 */

/*!
  \class QVersitContactImporterPropertyHandlerV2
  \brief The QVersitContactImporterPropertyHandlerV2 class is an interface for specifying
  custom import behaviour for vCard properties.
  \ingroup versit-extension
  \inmodule QtVersit

  This interface supercedes QVersitContactImporterPropertyHandler.  For general information on
  extending Qt Versit, see the document on \l{Qt Versit Plugins}.

  \sa QVersitContactImporter
 */

/*!
  \fn QVersitContactImporterPropertyHandlerV2::~QVersitContactImporterPropertyHandlerV2()
  Frees any memory in use by this handler.
 */

/*!
  \fn void QVersitContactImporterPropertyHandlerV2::propertyProcessed(const QVersitDocument& document, const QVersitProperty& property, const QContact& contact, bool* alreadyProcessed, QList<QContactDetail>* updatedDetails)
  Process \a property and provide a list of updated details by adding them to \a updatedDetails.

  This function is called on every QVersitProperty encountered during an import, after the property
  has been processed by the QVersitContactImporter.  An implementation of this function can be made
  to provide support for vCard properties not supported by QVersitContactImporter.

  The supplied \a document is the container for the \a property.  \a alreadyProcessed is true if
  the QVersitContactImporter or another handler was successful in processing the property.  If it is
  false and the handler processes the property, it should be set to true to inform later handlers
  that the property requires no further processing.  \a contact holds the state of the contact
  before the property was processed by the importer.  \a updatedDetails is initially filled with a
  list of details that the importer will update, and can be modified (by removing, modifying or
  adding details to the list)
 */

/*!
  \fn void QVersitContactImporterPropertyHandlerV2::documentProcessed(const QVersitDocument& document, QContact* contact)
  Perform any final processing on the \a contact generated by the \a document.  This can be
  implemented by the handler to clear any internal state before moving onto the next document.

  This function is called after all QVersitProperties have been handled by the
  QVersitContactImporter.
*/

/*!
  \class QVersitContactImporter
  \brief The QVersitContactImporter class converts \l{QVersitDocument}{QVersitDocuments} to
  \l{QContact}{QContacts}.

  \ingroup versit
  \inmodule QtVersit

  This class is used to convert lists of \l{QVersitDocument}{QVersitDocuments} (which may be
  produced by a QVersitReader) to lists of \l{QContact}{QContacts} (which may be saved into a
  QContactManager.  Unless there is an error, there is a one-to-one mapping between Versit
  documents and QContacts.  The importer can be extended by clients by associating resource
  and property handlers.

  Here is a simple example of how to use QVersitContactImporter:
  \snippet qtversitdocsample/qtversitdocsample.cpp Import example

  \section1 Extension via handlers

  A \l QVersitResourceHandler is associated with the importer to supply the behaviour for saving
  files to persistent storage.  By default, this is set to a \l QVersitDefaultResourceHandler,
  which does not save files to persistent storage.  Note that photos found in vCards
  are not saved to disk by default. If a full-sized image needs to be loaded from a URL
  and persisted on disk, a custom QVersitResourceHandler should be supplied which implements this.

  By associating a QVersitContactImporterPropertyHandlerV2 with the importer using
  setPropertyHandler(), the client can pass in a handler to override the processing of properties
  and/or handle properties that QVersitContactImporter doesn't support.  Also, handlers can be
  implicitly associated to an importer through the \l{Qt Versit Plugins}{handler plugin mechanism}.
  The importer can be constructed with a profile, which gives hints about what kind of handlers
  should be added to it.  For example, the backup profile can be used to instruct the importer to
  interpret properties that have been generated by a backup-profiled QVersitContactExporter.  To
  illustrate, a backup importer can be constructed with:
  \code
  QVersitContactImporter importer(QVersitContactHandlerFactory::ProfileBackup);
  \endcode
  For more details on how the backup plugin works, see \l{Qt Versit Plugins}

  \section1 Importing categories
  The importer imports the vCard CATEGORIES property by converting each category to a QContactTag.
  Some managers may not have support for QContactTag, but instead support categorization using the
  \l{QContactRelationship::HasMember}{HasMember} QContactRelationship along with contacts of type
  \l{QContactType::TypeGroup}{TypeGroup}.  For these backends, if the categorization information
  needs to be retained through group relationships, extra work needs to be done to do the
  conversion.  Below is some example code that does this translation.

  \snippet qtversitdocsample/qtversitdocsample.cpp Import relationship example

  \sa QVersitDocument, QVersitProperty, QVersitResourceHandler, QVersitContactImporterPropertyHandlerV2
 */

/*!
  \enum QVersitContactImporter::Error
  This enum specifies an error that occurred during the most recent call to importDocuments()
  \value NoError The most recent operation was successful
  \value InvalidDocumentError One of the documents is not a vCard
  \value EmptyDocumentError One of the documents is empty
  */


/*! Constructs a new importer */
QVersitContactImporter::QVersitContactImporter()
    : d(new QVersitContactImporterPrivate)
{
}

/*!
 * Constructs a new importer for the given \a profile.  The profile strings should be one of those
 * defined by QVersitContactHandlerFactory, or a value otherwise agreed to by a \l{Qt Versit
 * Plugins}{Versit plugin}.
 *
 * The profile determines which plugins will be loaded to supplement the importer.
 */
QVersitContactImporter::QVersitContactImporter(const QString& profile)
{
    if (profile.isEmpty())
        d = new QVersitContactImporterPrivate(QStringList());
    else
        d = new QVersitContactImporterPrivate(QStringList(profile));
}

/*!
 * Constructs a new importer for the given \a profiles.  The profile strings should be one of those
 * defined by QVersitContactHandlerFactory, or a value otherwise agreed to by a \l{Qt Versit
 * Plugins}{Versit plugin}.
 *
 * The profiles determine which plugins will be loaded to supplement the importer.
 */
QVersitContactImporter::QVersitContactImporter(const QStringList& profiles)
    : d(new QVersitContactImporterPrivate(profiles))
{
}

/*! Frees the memory used by the importer */
QVersitContactImporter::~QVersitContactImporter()
{
    delete d;
}

/*!
 * Converts \a documents into a corresponding list of QContacts.  After calling this, the converted
 * contacts can be retrieved by calling contacts().
 * Returns true on success.  If any of the documents cannot be imported as contacts (eg. they aren't
 * vCards), false is returned and errorMap() will return a list describing the errors that occurred.
 * The successfully imported documents will still be available via contacts().
 *
 * \sa contacts(), errorMap()
 */
bool QVersitContactImporter::importDocuments(const QList<QVersitDocument>& documents)
{
    int documentIndex = 0;
    int contactIndex = 0;
    d->mContacts.clear();
    d->mErrors.clear();
    bool ok = true;
    for (const QVersitDocument& document : documents) {
        QContact contact;
        QVersitContactImporter::Error error;
        if (d->importContact(document, contactIndex, &contact, &error)) {
            d->mContacts.append(contact);
            contactIndex++;
        } else {
            d->mErrors.insert(documentIndex, error);
            ok = false;
        }
        documentIndex++;
    }

    return ok;
}

/*!
 * Returns the contacts imported in the most recent call to importDocuments().
 *
 * \sa importDocuments()
 */
QList<QContact> QVersitContactImporter::contacts() const
{
    return d->mContacts;
}

/*!
 * \obsolete
 *
 * Use \l errorMap() instead.
 */
QMap<int, QVersitContactImporter::Error> QVersitContactImporter::errors() const
{
    return d->mErrors;
}

/*!
 * Returns the map of errors encountered in the most recent call to importDocuments().  The key is
 * the index into the input list of documents and the value is the error that occurred on that
 * document.
 *
 * \sa importDocuments()
 */
QMap<int, QVersitContactImporter::Error> QVersitContactImporter::errorMap() const
{
    return d->mErrors;
}

/*!
 * \deprecated
 * Sets \a handler to be the handler for processing QVersitProperties, or 0 to have no handler.
 *
 * Does not take ownership of the handler.  The client should ensure the handler remains valid for
 * the lifetime of the exporter.  This function is used for version 1 handlers.
 *
 * Only one property handler can be set.  If another property handler (of any version) was
 * previously set, it will no longer be associated with the importer.
 */
void QVersitContactImporter::setPropertyHandler(QVersitContactImporterPropertyHandler* handler)
{
    d->mPropertyHandlerVersion = 1;
    d->mPropertyHandler = handler;
    d->mPropertyHandler2 = NULL;
}

/*!
 * Sets \a handler to be the handler for processing QVersitProperties, or 0 to have no handler.
 *
 * Does not take ownership of the handler.  The client should ensure the handler remains valid for
 * the lifetime of the exporter.  This function is used for version 2 and higher handlers.
 *
 * Only one property handler can be set.  If another property handler (of any version) was
 * previously set, it will no longer be associated with the importer.
 */
void QVersitContactImporter::setPropertyHandler(QVersitContactImporterPropertyHandlerV2* handler)
{
    d->mPropertyHandlerVersion = 2;
    d->mPropertyHandler = 0;
    d->mPropertyHandler2 = handler;
}

/*!
 * \deprecated
 * Gets the handler for processing QVersitProperties.
 */
QVersitContactImporterPropertyHandler* QVersitContactImporter::propertyHandler() const
{
    return d->mPropertyHandler;
}

/*!
 * Sets \a handler to be the handler to save files with, or 0 to have no handler.
 *
 * Does not take ownership of the handler.  The client should ensure the handler remains valid for
 * the lifetime of the exporter.
 */
void QVersitContactImporter::setResourceHandler(QVersitResourceHandler* handler)
{
    d->mResourceHandler = handler;
}

/*!
 * Returns the associated resource handler.
 */
QVersitResourceHandler* QVersitContactImporter::resourceHandler() const
{
    return d->mResourceHandler;
}

QT_END_NAMESPACE_VERSIT
