CCats/daemon/include/JsonCommander.h

#ifndef JSONCOMMANDER_H
#define JSONCOMMANDER_H

#include <json/json.h>

#include "FileManager.h"

/**
 * @class JsonCommander
 *
 * A class to execute the json commands which were sent by a client.
 * It also uses the file manager for writing and reading files.
 */
class JsonCommander {
public:
  /**
   * Action for the json response.
   * send         - send the json answer
   * closeAndSend - send the json answer and close the socket
   * close        - close the socket
   */
  enum Action { close, send, closeAndSend };

  /**
   * Response for commands
   *
   * If action is set to close json can be uninitialized.
   */
  struct Response {
    Action action;
    Json::Value json;
  };

  /**
   * Creates a JsonCommaner
   */
  JsonCommander(FileManager &fileManager);

  /**
   * Deletes the JsonCommander
   */
  ~JsonCommander();

  /**
   * Executes commands
   */
  Response execute(const Json::Value &message);

  /**
   * Does version check before login
   */
  Response testVersion(const Json::Value &message);

  /**
   * Checks if login is valid
   */
  Response checkLogin(const Json::Value &message);

private:
  /**
   * protocol version of the client server protocol
   */
  const std::string protocolVersion = "0.2";

  /**
   * Contains the name of the user which uses the current connection.
   * Is set at checkLogin. Used for deleteUser.
   */
  std::string currentUser;

  /**
   * Map of all commands
   *
   * Used to find the command function fast
   */
  std::map<std::string, Response (JsonCommander::*)(const Json::Value &)>
      commandsMap;

  /**
   * file manager for reading and writing files
   */
  FileManager &fileManager;

  /**
   *
   * Last chunk number which was sent.
   */
  int getFileRemaining;

  /**
   * Last chunk number which was received.
   */
  int putFileReceived;

  /**
   * Executes the status command
   */
  Response executeStatus(const Json::Value &message);

  /**
   * Executes the close command
   */
  Response executeClose(const Json::Value &message);

  /**
   * Executes the list command
   */
  Response executeList(const Json::Value &message);

  /**
   * Executes the put command
   */
  Response executePut(const Json::Value &message);

  /**
   * Executes the putdata command
   */
  Response executePutdata(const Json::Value &message);

  /**
   * Executes the get command
   */
  Response executeGet(const Json::Value &message);

  /**
   * Executes the getdata command
   */
  Response executeGetdata(const Json::Value &message);

  /**
   * Executes the deleteme command
   */
  Response executeDeleteMe(const Json::Value &message);
};

#endif