zipassetmanager.h

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#ifndef ION_BASE_ZIPASSETMANAGER_H_
#define ION_BASE_ZIPASSETMANAGER_H_

#include <chrono>  // NOLINT
#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>

#include "base/macros.h"
#include "ion/port/mutex.h"

namespace ion {
namespace base {

class ION_API ZipAssetManager {
 public:
  ~ZipAssetManager();

  static bool RegisterAssetData(const void* data, size_t data_size);

  static bool ContainsFile(const std::string& filename);

  static bool IsFileCached(const std::string& filename);

  static std::vector<std::string> GetRegisteredFileNames();

  static std::shared_ptr<const std::string> GetFileDataPtr(
      const std::string& filename);
  static const std::string& GetFileData(const std::string& filename);
  static bool GetFileDataNoCache(const std::string& filename, std::string* out);

  static bool UpdateFileIfChanged(
      const std::string& filename,
      std::chrono::system_clock::time_point* timestamp);

  static bool SetFileData(const std::string& filename,
                          const std::string& source);

  static bool SaveFileData(const std::string& filename);

  static void Reset();

 private:
  struct FileInfo {
    void* zip_handle;
    std::chrono::system_clock::time_point timestamp;
    std::shared_ptr<std::string> data_ptr;
    std::string original_name;
  };
  typedef std::map<std::string, FileInfo> FileCache;

  ZipAssetManager();

  const std::string& GetFileDataLocked(const std::string& filename,
                                       std::string* out);

  bool ContainsFileLocked(const std::string& filename);

  static ZipAssetManager* GetManager();

  static bool FileIsCached(const FileInfo& info);

  FileCache file_cache_;
  std::set<void*> zipfiles_;

  port::Mutex mutex_;

  DISALLOW_COPY_AND_ASSIGN(ZipAssetManager);
};

}  // namespace base
}  // namespace ion

#endif  // ION_BASE_ZIPASSETMANAGER_H_