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/*
* Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3, or any
* later version accepted by the membership of KDE e.V. (or its
* successor approved by the membership of KDE e.V.), which shall
* act as a proxy defined in Section 6 of version 3 of the license.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "sink_export.h"
#include <QByteArrayList>
#include <QHash>
#include <QSet>
#include "applicationdomaintype.h"
namespace Sink {
/**
* A query that matches a set of entities.
*/
class SINK_EXPORT Query
{
public:
enum Flag
{
/** Leave the query running and continuously update the result set. */
LiveQuery,
/** Run the query synchronously. */
SynchronousQuery
};
Q_DECLARE_FLAGS(Flags, Flag)
struct Comparator {
enum Comparators {
Invalid,
Equals,
Contains
};
Comparator();
Comparator(const QVariant &v);
Comparator(const QVariant &v, Comparators c);
bool matches(const QVariant &v) const;
QVariant value;
Comparators comparator;
};
static Query PropertyFilter(const QByteArray &key, const QVariant &value)
{
Query query;
query.propertyFilter.insert(key, Comparator(value));
return query;
}
static Query PropertyContainsFilter(const QByteArray &key, const QVariant &value)
{
Query query;
query.propertyFilter.insert(key, Comparator(value, Comparator::Contains));
return query;
}
static Query PropertyFilter(const QByteArray &key, const ApplicationDomain::Entity &entity)
{
return PropertyFilter(key, QVariant::fromValue(entity.identifier()));
}
static Query ResourceFilter(const QByteArray &identifier)
{
Query query;
query.resources.append(identifier);
return query;
}
static Query ResourceFilter(const QByteArrayList &identifier)
{
Query query;
query.resources = identifier;
return query;
}
static Query ResourceFilter(const ApplicationDomain::SinkResource &entity)
{
return ResourceFilter(entity.identifier());
}
static Query AccountFilter(const QByteArray &identifier)
{
Query query;
query.accounts.append(identifier);
return query;
}
static Query CapabilityFilter(const QByteArray &capability)
{
Query query;
query.propertyFilter.insert("capabilities", Comparator(capability, Comparator::Contains));
return query;
}
static Query AccountFilter(const QByteArrayList &identifier)
{
Q_ASSERT(!identifier.isEmpty());
Query query;
query.accounts = identifier;
return query;
}
static Query AccountFilter(const ApplicationDomain::SinkAccount &entity)
{
return AccountFilter(entity.identifier());
}
static Query IdentityFilter(const QByteArray &identifier)
{
Q_ASSERT(!identifier.isEmpty());
Query query;
query.ids << identifier;
return query;
}
static Query IdentityFilter(const QByteArrayList &identifier)
{
Query query;
query.ids = identifier;
return query;
}
static Query IdentityFilter(const ApplicationDomain::Entity &entity)
{
auto query = IdentityFilter(entity.identifier());
query.resources << entity.resourceInstanceIdentifier();
return query;
}
static Query RequestedProperties(const QByteArrayList &properties)
{
Query query;
query.requestedProperties = properties;
return query;
}
static Query RequestTree(const QByteArray &parentProperty)
{
Query query;
query.parentProperty = parentProperty;
return query;
}
template <typename T>
Query &request()
{
requestedProperties << T::name;
return *this;
}
template <typename T>
Query &sort()
{
sortProperty = T::name;
return *this;
}
template <typename T>
Query &filter(const QVariant &value)
{
propertyFilter.insert(T::name, value);
return *this;
}
template <typename T>
Query &filter(const Comparator &comparator)
{
propertyFilter.insert(T::name, comparator);
return *this;
}
template <typename T>
Query &filter(const ApplicationDomain::Entity &value)
{
propertyFilter.insert(T::name, QVariant::fromValue(value.identifier()));
return *this;
}
Query(const ApplicationDomain::Entity &value) : limit(0), liveQuery(false), synchronousQuery(false), threadLeaderOnly(false), bloomThread(false)
{
ids << value.identifier();
resources << value.resourceInstanceIdentifier();
}
Query(Flags flags = Flags()) : limit(0), liveQuery(false), synchronousQuery(false), threadLeaderOnly(false), bloomThread(false)
{
}
Query &operator+=(const Query &rhs)
{
resources += rhs.resources;
accounts += rhs.accounts;
ids += rhs.ids;
for (auto it = rhs.propertyFilter.constBegin(); it != rhs.propertyFilter.constEnd(); it++) {
propertyFilter.insert(it.key(), it.value());
}
requestedProperties += rhs.requestedProperties;
parentProperty = rhs.parentProperty;
sortProperty = rhs.sortProperty;
limit = rhs.limit;
return *this;
}
friend Query operator+(Query lhs, const Query &rhs)
{
lhs += rhs;
return lhs;
}
QByteArrayList resources;
QByteArrayList accounts;
QByteArrayList ids;
QHash<QByteArray, Comparator> propertyFilter;
QByteArrayList requestedProperties;
QByteArray parentProperty;
QByteArray sortProperty;
int limit;
bool liveQuery;
bool synchronousQuery;
bool threadLeaderOnly;
bool bloomThread;
};
}
QDebug operator<<(QDebug dbg, const Sink::Query::Comparator &c);
Q_DECLARE_OPERATORS_FOR_FLAGS(Sink::Query::Flags)
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