CreateInputCommand.java

// NOTE read Responses.java first itll make more sense
public class CreateInputCommand implements ResponseFunc {
  private String front = "";
  private String back = "";
  // handle types??
  
  @Override
  public boolean funcCall(String i, State s) {
    if (s.state == StateEnum.CREATE_STATE_FRONT) {
      front = i;
      s.state = StateEnum.CREATE_STATE_BACK;
    } else if (s.state == StateEnum.CREATE_STATE_BACK) {
      back = i;
      s.getDeck(s.createdDeckName).addCard(new FrontBackCard(front, back));
      // TODO generalize for other types
      
      s.state = StateEnum.CREATE_STATE_FRONT;
    }else {
      return false;
      // entered at wrong state
    }
    return true;
  }
}

Responses.java

enum Responses {
  LOGGER(".*", (i,s) -> {
    s.log(i);
    return false;
  }),
  ...
  CREATE("^create deck/ .+", (i,s) -> {
    if (s.state != StateEnum.DEFAULT) return false;
    // dont intercept input if not default state
    // note all commands should have something like this
    // even import export
    
    String deckName = i.split("deck/")[1].trim();
    if(s.hasDeck(deckName)) {
      // REPORT DECK EXISTS
    } else {
      s.state = StateEnum.CREATE_STATE_FRONT;
      s.createdDeckName = deckName;
      s.addDeck(new Deck(deckName));
      // PRINT INSTRUCTIONS TO USER HOW TO CREATE DECK
    }
  }),
  CREATE_INPUT(".*", new CreateInputCommand()),
  CREATE_ONE_SHOT("front/ .+ back .+", (i,s) -> {
    if (s.state != StateEnum.CREATE_STATE_FRONT &&
        s.state != StateEnum.CREATE_STATE_BACK) return false;
    String[] inpsplit = i.split("front/")[1].split("back/");
    String front = inpsplit[0].trim();
    String back = inpsplit[1].trim();
    //s.getDeck(s.createdDeckName).addCard(new FrontBackzcard(front, back));
    s.state = StateEnum.CREATE_STATE_FRONT;
    Responses.CREATE_INPUT.call(front, s);
    Responses.CREATE_INPUT.call(back,s);
    return true;
  CREATE_QUIT("quit", (i,s) -> {
    if (s.state != StateEnum.CREATE_STATE_FRONT &&
        s.state != StateEnum.CREATE_STATE_BACK) return false;
    s.state = StateEnum.DEFAULT;
    // MESSAGE USER END CREATION MODE
    return true;
  }),
  ...
  UNKNOWN_INPUT(".*", (i,s) -> {
    System.out.println("I don't understand :-(");
    return true;
  });
}

/** NOTES:
 * 0. i did not write proper regex this is all just pseudocode.
 * 1. The first enum can be Logger with regex that match all, logs command,
 * then return false so input can be matched by the corresponding enum.
 * 2. Create, uses the ResponseFunc interface instance
 * 3. Make sure last has a regex with match all, for when all other
 * commands fail to capture is; unknown command.
 * 4. If you want to specify more details you can always add more s.log() calls
 * in the lambdas.
 * 5. You can even consider adding dateTime stamp to log, and save log to file via
 * Storage manager, and this could be a feature under your name.