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https://github.com/Nimac0/SDL_Minigame
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41 lines
1.6 KiB
C++
41 lines
1.6 KiB
C++
#pragma once
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#include <map>
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#include <any>
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#include <string>
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#include <optional>
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#include "Component.h"
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//! \brief DataComponent class to centrally store data about an entity such as stats
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class DataComponent : public Component
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{
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public:
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//! \brief The data component only has a default constructor
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DataComponent() {};
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~DataComponent() {};
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/**
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* @brief Set a key-value pair of any type in the data map
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* @details e.g. \code{.cpp}setEntry("speed", 180);\endcode in this case the key is "speed" and the value is set to an integer of 180
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* @param key The name to store the value under
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* @param value The value to store of type T
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*/
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template <typename T>
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void setEntry(const std::string& key, const T& value) { dataMap.insert_or_assign(key, value); }
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/**
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* @brief Get a value of type T from the data map
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* @details e.g. \code{.cpp}getEntry<int>("speed").value();\endcode in this case the key is "speed" and the value is returned as an integer
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* @details the value() or value_or() is NEEDED to handle the optional return type
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* @param key The name to retrieve the value from
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* @return An optional of type T containing the value if it exists and matches in typeid, otherwise std::nullopt
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*/
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template<typename T>
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std::optional<T> getEntry(std::string key) const {
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if (!this->dataMap.contains(key)) return std::nullopt;
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const std::any& value = this->dataMap.at(key);
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if (value.type() != typeid(T)) { return std::nullopt; }
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return std::any_cast<T>(value);
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}
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private:
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std::map<std::string, std::any> dataMap;
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}; |