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/*
* Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "entitystorage.h"
ResultSet EntityStorageBase::filteredSet(const ResultSet &resultSet, const std::function<bool(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject)> &filter, const Akonadi2::Storage::Transaction &transaction, bool initialQuery)
{
auto resultSetPtr = QSharedPointer<ResultSet>::create(resultSet);
//Read through the source values and return whatever matches the filter
std::function<bool(std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)>)> generator = [this, resultSetPtr, &transaction, filter, initialQuery](std::function<void(const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &, Akonadi2::Operation)> callback) -> bool {
while (resultSetPtr->next()) {
readEntity(transaction, resultSetPtr->id(), [this, filter, callback, initialQuery](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject, Akonadi2::Operation operation) {
//Always remove removals, they probably don't match due to non-available properties
if (filter(domainObject) || operation == Akonadi2::Operation_Removal) {
if (initialQuery) {
//We're not interested in removals during the initial query
if (operation != Akonadi2::Operation_Removal) {
callback(domainObject, Akonadi2::Operation_Creation);
}
} else {
callback(domainObject, operation);
}
}
});
}
return false;
};
return ResultSet(generator);
}
ResultSet EntityStorageBase::getResultSet(const Akonadi2::Query &query, Akonadi2::Storage::Transaction &transaction, qint64 baseRevision)
{
QSet<QByteArray> remainingFilters = query.propertyFilter.keys().toSet();
ResultSet resultSet;
const bool initialQuery = (baseRevision == 1);
if (initialQuery) {
Trace() << "Initial result set update";
resultSet = loadInitialResultSet(query, transaction, remainingFilters);
} else {
//TODO fallback in case the old revision is no longer available to clear + redo complete initial scan
Trace() << "Incremental result set update" << baseRevision;
resultSet = loadIncrementalResultSet(baseRevision, query, transaction, remainingFilters);
}
auto filter = [remainingFilters, query, baseRevision](const Akonadi2::ApplicationDomain::ApplicationDomainType::Ptr &domainObject) -> bool {
for (const auto &filterProperty : remainingFilters) {
//TODO implement other comparison operators than equality
if (domainObject->getProperty(filterProperty) != query.propertyFilter.value(filterProperty)) {
return false;
}
}
return true;
};
return filteredSet(resultSet, filter, transaction, initialQuery);
}
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