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#include "EventManager.h"
namespace crepe {
template <typename EventType>
void EventManager::subscribe(const EventHandler<EventType> & callback, int channel, int priority) {
using HandlersMap
= std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>;
using HandlersVec = std::vector<std::unique_ptr<IEventHandlerWrapper>>;
std::type_index event_type = typeid(EventType);
std::unique_ptr<EventHandlerWrapper<EventType>> handler
= std::make_unique<EventHandlerWrapper<EventType>>(callback);
if (channel) {
HandlersMap & handlers_map = this->subscribers_by_event_id[event_type];
auto handlers = handlers_map.find(channel);
if (handlers != handlers_map.end()) {
handlers->second.emplace_back(std::move(handler));
} else {
handlers_map[channel].emplace_back(std::move(handler));
}
} else {
HandlersVec & handlers = this->subscribers[event_type];
handlers.emplace_back(std::move(handler));
}
}
template <typename EventType>
void EventManager::queue_event(const EventType & event, int channel,int priority) {
static_assert(std::is_base_of<Event, EventType>::value, "EventType must derive from Event");
std::type_index event_type = typeid(EventType);
auto event_ptr = std::make_unique<EventType>(event);
this->events_queue.push_back(
QueueEntry{
.event = std::move(event_ptr),
.channel = channel,
.type = event_type
}
);
}
template <typename EventType>
void EventManager::trigger_event(const EventType & event, int channel) {
using HandlersMap
= std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>;
using HandlersVec = std::vector<std::unique_ptr<IEventHandlerWrapper>>;
std::type_index event_type = typeid(EventType);
if (channel > 0) {
HandlersMap & handlers_map = this->subscribers_by_event_id[event_type];
auto handlers_it = handlers_map.find(channel);
if (handlers_it != handlers_map.end()) {
HandlersVec & handlers = handlers_it->second;
for (auto it = handlers.begin(); it != handlers.end(); ++it) {
// stops when callback returns true
if ((*it)->exec(event)) {
break;
}
}
}
} else {
HandlersVec & handlers = this->subscribers[event_type];
for (auto it = handlers.begin(); it != handlers.end(); ++it) {
// stops when callback returns true
if ((*it)->exec(event)) {
break;
}
}
}
}
template <typename EventType>
void EventManager::unsubscribe(const EventHandler<EventType> & callback, int channel) {
using HandlersMap
= std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>;
using HandlersVec = std::vector<std::unique_ptr<IEventHandlerWrapper>>;
std::type_index event_type = typeid(EventType);
std::string handler_name = callback.target_type().name();
if (channel) {
auto subscriber_list = this->subscribers_by_event_id.find(event_type);
if (subscriber_list != this->subscribers_by_event_id.end()) {
HandlersMap & handlers_map = subscriber_list->second;
auto handlers = handlers_map.find(channel);
if (handlers != handlers_map.end()) {
HandlersVec & callbacks = handlers->second;
for (auto it = callbacks.begin(); it != callbacks.end(); ++it) {
if ((*it)->get_type() == handler_name) {
it = callbacks.erase(it);
return;
}
}
}
}
} else {
auto handlers_it = this->subscribers.find(event_type);
if (handlers_it != this->subscribers.end()) {
HandlersVec & handlers = handlers_it->second;
for (auto it = handlers.begin(); it != handlers.end(); ++it) {
if ((*it)->get_type() == handler_name) {
it = handlers.erase(it);
return;
}
}
}
}
}
} // namespace crepe
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