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#pragma once
#include <utility>
#include <memory>
#include <sdbusplus/message.hpp>
#include "utils.hpp"
namespace phosphor
{
namespace inventory
{
namespace manager
{
class Manager;
namespace details
{
using FilterBase = holder::CallableBase <
bool, sdbusplus::message::message&, Manager& >;
using FilterBasePtr = std::shared_ptr<FilterBase>;
template <typename T>
using Filter = holder::CallableHolder <
T, bool, sdbusplus::message::message&, Manager& >;
/** @struct Event
* @brief Event object interface.
*/
struct Event
{
enum class Type
{
DBUS_SIGNAL,
};
virtual ~Event() = default;
Event(const Event&) = default;
Event& operator=(const Event&) = default;
Event(Event&&) = default;
Event& operator=(Event&&) = default;
explicit Event(Type t) : type(t) {}
Type type;
};
using EventBasePtr = std::shared_ptr<Event>;
/** @struct DbusSignal
* @brief DBus signal event.
*
* DBus signal events are an association of a match signature
* and filtering function object.
*/
struct DbusSignal final :
public Event,
public std::tuple<const char*, FilterBasePtr>
{
virtual ~DbusSignal() = default;
DbusSignal(const DbusSignal&) = default;
DbusSignal& operator=(const DbusSignal&) = delete;
DbusSignal(DbusSignal&&) = default;
DbusSignal& operator=(DbusSignal&&) = default;
/** @brief Import from signature and filter constructor.
*
* @param[in] sig - The DBus match signature.
* @param[in] filter - A DBus signal match callback filtering function.
*/
DbusSignal(const char* sig, FilterBasePtr filter) :
Event(Type::DBUS_SIGNAL),
std::tuple<const char*, FilterBasePtr>(
sig, std::move(filter)) {}
};
/** @brief make_filter
*
* Adapt a filter function object.
*
* @param[in] filter - The filter being adapted.
* @returns - The adapted filter.
*
* @tparam T - The type of the filter being adapted.
*/
template <typename T>
auto make_filter(T&& filter)
{
return Filter<T>::template make_shared<Filter<T>>(
std::forward<T>(filter));
}
} // namespace details
namespace filters
{
namespace details
{
namespace property_condition
{
/** @struct PropertyCondition
* @brief Match filter functor that tests a property value.
*
* @tparam T - The type of the property being tested.
* @tparam U - The type of the condition checking functor.
*/
template <typename T, typename U>
struct PropertyCondition
{
PropertyCondition() = delete;
~PropertyCondition() = default;
PropertyCondition(const PropertyCondition&) = default;
PropertyCondition& operator=(const PropertyCondition&) = delete;
PropertyCondition(PropertyCondition&&) = default;
PropertyCondition& operator=(PropertyCondition&&) = default;
PropertyCondition(const char* iface, const char* property, U&& condition) :
_iface(iface),
_property(property),
_condition(std::forward<U>(condition)) { }
/** @brief Test a property value.
*
* Extract the property from the PropertiesChanged
* message and run the condition test.
*/
bool operator()(sdbusplus::message::message& msg, Manager&) const
{
std::map <
std::string,
sdbusplus::message::variant<T >> properties;
const char* iface = nullptr;
msg.read(iface);
if (strcmp(iface, _iface))
{
return false;
}
msg.read(properties);
auto it = properties.find(_property);
if (it == properties.cend())
{
return false;
}
return _condition(it->second.template get<T>());
}
private:
const char* _iface;
const char* _property;
U _condition;
};
} // namespace property_condition
} // namespace details
/** @brief The default filter. */
inline bool none(sdbusplus::message::message&, Manager&) noexcept
{
return true;
}
/** @brief Implicit type deduction for constructing PropertyCondition. */
template <typename T>
auto propertyChangedTo(
const char* iface,
const char* property,
T val)
{
auto condition = [val = std::move(val)](const std::string & arg)
{
return arg == val;
};
using U = decltype(condition);
return details::property_condition::PropertyCondition<T, U>(
iface, property, std::move(condition));
}
} // namespace filters
} // namespace manager
} // namespace inventory
} // namespace phosphor
// vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
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