bbop in golang

bbop.go

package la0c

import (
	"math/rand"
	"strconv"
	"strings"
)

const (
	ANSWER   = "ビ,ビ,ッ,ド,レ,ッ,ド,・,オ,ペ,レ,ー,ショ,ン"
	MATERIAL = "ビ,ビ,ド,レ,ド,オ,ペ,レ,ショ"
)

type bbopResult struct {
	Result     string `json:"result"`
	MatchCount int    `json:"match_count"`
}

func TryBBOP(seed string) bbopResult {
	answerArray := strings.Split(ANSWER, ",")
	baseArray := strings.Split(ANSWER, ",")
	materialArray := strings.Split(MATERIAL, ",")
	for i, ans := range answerArray {
		switch ans {
		case "ッ", "・", "ー", "ン":
			continue
		default:
			if i, err := strconv.ParseInt(seed, 10, 64); err == nil {
				rand.Seed(i)
			}
			index := rand.Intn(9)
			baseArray[i] = materialArray[index]
		}
	}
	return bbopResult{
		Result:     strings.Join(baseArray, ""),
		MatchCount: CalcMatchCount(baseArray),
	}
}

func CalcMatchCount(result []string) int {
	answerArray := strings.Split(ANSWER, ",")
	count := 0
	for i, ans := range answerArray {
		switch ans {
		case "ッ", "・", "ー", "ン":
			continue
		default:
			if result[i] == ans {
				count++
			}
		}
	}
	return count
}