command_manager.h

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#ifndef YAZE_APP_EDITOR_SYSTEM_COMMAND_MANAGER_H
#define YAZE_APP_EDITOR_SYSTEM_COMMAND_MANAGER_H
 
#include <functional>
#include <string>
#include <unordered_map>
 
#include "imgui/imgui.h"
 
namespace yaze {
namespace editor {
 
class CommandManager {
 public:
  CommandManager() = default;
  ~CommandManager() = default;
 
  using Command = std::function<void()>;
 
  struct CommandInfo {
    Command command;
    char mnemonic;
    std::string name;
    std::string desc;
    CommandInfo(Command command, char mnemonic, const std::string &name,
                const std::string &desc)
        : command(std::move(command)),
          mnemonic(mnemonic),
          name(name),
          desc(desc) {}
    CommandInfo() = default;
  };
 
  // New command info which supports subsections of commands
  struct CommandInfoOrPrefix {
    CommandInfo command_info;
    std::unordered_map<std::string, CommandInfoOrPrefix> subcommands;
    CommandInfoOrPrefix(CommandInfo command_info)
        : command_info(std::move(command_info)) {}
    CommandInfoOrPrefix() = default;
  };
 
  void RegisterPrefix(const std::string &group_name, const char prefix,
                      const std::string &name, const std::string &desc) {
    commands_[group_name].command_info = {nullptr, prefix, name, desc};
  }
 
  void RegisterSubcommand(const std::string &group_name,
                          const std::string &shortcut, const char mnemonic,
                          const std::string &name, const std::string &desc,
                          Command command) {
    commands_[group_name].subcommands[shortcut].command_info = {
        command, mnemonic, name, desc};
  }
 
  void RegisterCommand(const std::string &shortcut, Command command,
                       char mnemonic, const std::string &name,
                       const std::string &desc) {
    commands_[shortcut].command_info = {std::move(command), mnemonic, name,
                                        desc};
  }
 
  void ExecuteCommand(const std::string &shortcut) {
    if (commands_.find(shortcut) != commands_.end()) {
      commands_[shortcut].command_info.command();
    }
  }
 
  void ShowWhichKey();
 
  void SaveKeybindings(const std::string &filepath);
  void LoadKeybindings(const std::string &filepath);
 
 private:
  std::unordered_map<std::string, CommandInfoOrPrefix> commands_;
};
 
}  // namespace editor
}  // namespace yaze
 
#endif  // YAZE_APP_EDITOR_SYSTEM_COMMAND_MANAGER_H