Review

In the previous section, we simply called the actions interface to perform a discard operation. However, we know that in the game of Majsoul, after declaring Riichi, the server will automatically discard the last tile for the player. Therefore, we need to modify the code from the previous section to cancel this action when the player has already declared Riichi.

How to Determine the State

• The gamestate library provides some game states that can help you determine the current status of the game.

Example Code

package main

import (
  "github.com/moxcomic/Archer/actions"
  "github.com/moxcomic/lq"
)

const (
  E_PlayOperation_None           = iota
  E_PlayOperation_Discard
  E_PlayOperation_Chi
  E_PlayOperation_Pon
  E_PlayOperation_Ankan
  E_PlayOperation_Minkan
  E_PlayOperation_Kakan
  E_PlayOperation_RiiChi
  E_PlayOperation_Tsumo
  E_PlayOperation_Ron
  E_PlayOperation_JiuZhongJiuPai
  E_PlayOperation_Babei
  E_PlayOperation_HuanSanZhang
  E_PlayOperation_DingQue
  E_PlayOperation_Reveal
  E_PlayOperation_Unveil
  E_PlayOperation_LockTile
  E_PlayOperation_Revealliqi
)

func onExecute(result *lq.NotifyAIResult, risk []float64, r, m, f, t float64) {
  if result.GetResult()[0].GetType() == E_PlayOperation_Discard {
    if gamestate.Inst().Riichi()[0] {
      if gamestate.Inst().IsOperation(E_PlayOperation_Ankan) {
        actions.NewMajsoulActions().Cancel()
      }
      
      return
    }
    
    actions.NewMajsoulActions().Discard(result.GetResult()[0].GetTile(), result.GetResult()[0].GetMoqie())
  }
}

• In the onExecute function, we check if the game is currently in a Riichi state. If so, and the current operation is E_PlayOperation_Ankan, the action will be canceled.
• Otherwise, we call the Discard action interface to perform the discard operation.
• Note: Since the Discard action interface requires passing in the tile and draw information, we need to retrieve the tile and draw-cut information from result.GetResult()[0].GetTile() and result.GetResult()[0].GetMoqie().
• For more information on gamestate, refer to gamestate.