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#pragma once
#include <map>
#include <set>
namespace phosphor
{
namespace led
{
/** @class Manager
* @brief Manages group of LEDs and applies action on the elements of group
*/
class Manager
{
public:
/** @brief Define possible actions on a given LED.
* For the BLINK operation, follow 50-50 duty cycle
*/
enum Action
{
Off,
On,
Blink,
};
/** @brief Only need the default Manager */
Manager() = default;
~Manager() = default;
Manager(const Manager&) = delete;
Manager& operator=(const Manager&) = delete;
Manager(Manager&&) = delete;
Manager& operator=(Manager&&) = delete;
/** @brief Name of the LED and it's proposed action.
* This structure is supplied as configuration at build time
*/
struct LedAction
{
std::string name;
Action action;
// Needed for inserting elements into sets
bool operator<(const LedAction& right) const
{
if (name == right.name)
{
return action < right.action;
}
return name < right.name;
}
};
/** @brief For finding intersection */
static bool ledComp(const LedAction& left, const LedAction& right)
{
return left.name < right.name;
}
using group = std::set<LedAction>;
/** @brief static global map constructed at compile time */
static const std::map<std::string, group> ledMap;
/** @brief Given a group name, applies the action on the group
*
* @param[in] path - dbus path of group
* @param[in] assert - Could be true or false
* @return - Success or exception thrown
*/
bool setGroupState(const std::string& path, bool assert);
private:
/** @brief Pointers to groups that are in asserted state */
std::set<const group*> assertedGroups;
/** @brief Contains the LEDs that are in asserted state */
group currentState;
/** @brief Finds the set of LEDs to operate on and executes action
*
* @return: None
*/
void driveLEDs();
};
} // namespace led
} // namespace phosphor
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