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#pragma once
#include "Base.h"
#include <algorithm>
#include <functional>
#include <utility>
#include <vector>
namespace cru {
template <typename T>
class HandlerRegistryIterator {
public:
using RawIterator =
typename std::vector<std::pair<int, std::function<T>>>::const_iterator;
explicit HandlerRegistryIterator(RawIterator raw) : raw_(std::move(raw)) {}
CRU_DELETE_COPY(HandlerRegistryIterator)
CRU_DELETE_MOVE(HandlerRegistryIterator)
~HandlerRegistryIterator() = default;
const std::function<T>& operator*() const { return raw_->second; }
const std::function<T>* operator->() const { return &raw_->second; }
HandlerRegistryIterator& operator++() {
++raw_;
return *this;
}
HandlerRegistryIterator operator++(int) {
auto c = *this;
this->operator++();
return c;
}
bool operator==(const HandlerRegistryIterator<T>& other) const {
return this->raw_ == other.raw_;
}
bool operator!=(const HandlerRegistryIterator<T>& other) const {
return !this->operator==(other);
}
private:
RawIterator raw_;
};
template <typename T>
class HandlerRegistry final {
public:
HandlerRegistry() = default;
CRU_DEFAULT_COPY(HandlerRegistry)
CRU_DEFAULT_MOVE(HandlerRegistry)
~HandlerRegistry() = default;
public:
int AddHandler(std::function<T> handler) {
auto id = current_id_++;
handler_list_.push_back({id, std::move(handler)});
return id;
}
void RemoveHandler(int id) {
auto result = std::find_if(handler_list_.cbegin(), handler_list_.cend(),
[id](const std::pair<int, std::function<T>>& d) {
return d.first == id;
});
if (result != handler_list_.cend()) {
handler_list_.erase(result);
}
}
HandlerRegistryIterator<T> begin() const {
return HandlerRegistryIterator<T>(handler_list_.begin());
}
HandlerRegistryIterator<T> end() const {
return HandlerRegistryIterator<T>(handler_list_.end());
}
private:
int current_id_ = 1;
std::vector<std::pair<int, std::function<T>>> handler_list_;
};
} // namespace cru
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