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#include "EventManager.h"
namespace crepe {
template <typename EventType>
void EventManager::subscribe(const EventHandler<EventType> & callback, int channel,
int priority) {
std::type_index event_type = typeid(EventType);
std::unique_ptr<EventHandlerWrapper<EventType>> handler
= std::make_unique<EventHandlerWrapper<EventType>>(callback);
std::vector<CallbackEntry> & handlers = this->subscribers[event_type];
handlers.emplace_back(CallbackEntry{
.callback = std::move(handler),
.channel = channel,
.priority = priority,
});
// Sort handlers by priority (highest first)
std::sort(handlers.begin(), handlers.end(),
[](const CallbackEntry & a, const CallbackEntry & b) {
return a.priority > b.priority;
});
}
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,
.priority = priority});
}
template <typename EventType>
void EventManager::trigger_event(const EventType & event, int channel) {
std::type_index event_type = typeid(EventType);
auto handlers_it = this->subscribers.find(event_type);
if (handlers_it != this->subscribers.end()) {
const std::vector<CallbackEntry> & handlers = handlers_it->second;
for (const CallbackEntry & handler : handlers) {
if (handler.channel != channel && handler.channel != CHANNEL_ALL) {
continue;
}
if (handler.callback->exec(event)) {
break;
}
}
}
}
template <typename EventType>
void EventManager::unsubscribe(const EventHandler<EventType> & callback, int channel) {
std::type_index event_type = typeid(EventType);
std::string handler_name = callback.target_type().name();
// Find the list of handlers for this event type
auto handlers_it = this->subscribers.find(event_type);
if (handlers_it != this->subscribers.end()) {
std::vector<CallbackEntry> & handlers = handlers_it->second;
for (auto it = handlers.begin(); it != handlers.end();) {
// Match based on handler type and channel
if (it->callback->get_type() == handler_name && it->channel == channel) {
it = handlers.erase(it);
return;
}
++it;
}
}
}
} // namespace crepe
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