ServiceInterfaces.h

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#pragma once
 
// Small, capability-registered service interfaces for the engine's platform
// services (filesystem / network / timer).
//
// Providers register a live implementation with eve::cap::provide<I>(impl) at
// module construction; consumers query with eve::cap::query<I>() and cope with
// nullptr. Tests provide deterministic mock implementations so error paths can
// be exercised offline (see test/service_mocks.cpp).
 
#include <cstddef>
#include <cstdint>
#include <string>
#include <vector>
 
namespace eve::service {
 
class IFileSystem {
public:
    static constexpr const char *capabilityName = "IFileSystem";
    virtual ~IFileSystem() = default;
 
    virtual bool readFile(const std::string &path, std::vector<uint8_t> &out) = 0;
    virtual bool writeFile(const std::string &path, const void *data, size_t size) = 0;
    virtual bool fileExists(const std::string &path) = 0;
};
 
class INetwork {
public:
    static constexpr const char *capabilityName = "INetwork";
    virtual ~INetwork() = default;
 
    virtual bool httpRequest(const std::string &method, const std::string &url,
                             const std::string &body, int timeoutMs, int &status,
                             std::string &responseBody) = 0;
};
 
class ITimer {
public:
    static constexpr const char *capabilityName = "ITimer";
    virtual ~ITimer() = default;
 
    virtual double elapsedSeconds() = 0;
};
 
}  // namespace eve::service