GeneratorRegistry.h

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#pragma once
#include "common/Export.h"
 
 
#include "procgen/Grid2D.h"
#include "procgen/ParamSchema.h"
#include "procgen/Params.h"
 
#include <functional>
#include <string>
#include <unordered_map>
#include <utility>
#include <vector>
 
namespace eve::procgen {
 
using GeneratorFn = std::function<bool(const Params &params, Grid2D &out, std::string &error)>;
 
using GeneratorDescriptor = RecipeDescriptor;
 
class EVENGINE_API_DOMAINS GeneratorRegistry {
public:
    static GeneratorRegistry &instance();
 
    void registerAlgorithm(const std::string &id, GeneratorFn fn);
    void registerAlgorithm(GeneratorDescriptor descriptor, GeneratorFn fn);
    bool has(const std::string &id) const;
    bool generate(const std::string &id, const Params &params, Grid2D &out, std::string &error) const;
    std::vector<std::string> list() const;
    const GeneratorDescriptor *descriptor(const std::string &id) const;
    bool applyDefaults(const std::string &id, Params &params) const;
 
    void registerBuiltins();
 
private:
    struct Entry {
        GeneratorFn          generate;
        GeneratorDescriptor descriptor;
    };
    GeneratorRegistry() = default;
    std::unordered_map<std::string, Entry> algorithms_;
    bool builtinsRegistered_ = false;
};
 
}  // namespace eve::procgen