feat: rps commands

internal/db/services/rps/service.go

@@ -0,0 +1,136 @@
+package rps
+
+import (
+	"context"
+	"crypto/rand"
+	"errors"
+	"math/big"
+	"strings"
+
+	"velox-bot/internal/db/repos/rpsrepo"
+)
+
+type Repo interface {
+	GetScore(ctx context.Context, guildID int64, userID int64) (int, bool, error)
+	SetScore(ctx context.Context, guildID int64, userID int64, score int) error
+	TopScores(ctx context.Context, guildID int64, limit int) ([]rpsrepo.ScoreEntry, error)
+}
+
+type Service struct {
+	repo Repo
+}
+
+func New(repo Repo) *Service {
+	return &Service{repo: repo}
+}
+
+type Hand string
+
+const (
+	HandScissors Hand = "✌️"
+	HandPaper    Hand = "✋"
+	HandRock     Hand = "🤜"
+)
+
+func (h Hand) String() string { return string(h) }
+
+func ParseHand(s string) (Hand, bool) {
+	switch strings.TrimSpace(s) {
+	case string(HandScissors):
+		return HandScissors, true
+	case string(HandPaper):
+		return HandPaper, true
+	case string(HandRock):
+		return HandRock, true
+	default:
+		return "", false
+	}
+}
+
+func RandomHand() (Hand, error) {
+	n, err := rand.Int(rand.Reader, big.NewInt(3))
+	if err != nil {
+		return "", err
+	}
+	switch n.Int64() {
+	case 0:
+		return HandScissors, nil
+	case 1:
+		return HandPaper, nil
+	default:
+		return HandRock, nil
+	}
+}
+
+type GameResult string
+
+const (
+	ResultWin  GameResult = "You won!"
+	ResultLose GameResult = "You lost!"
+	ResultTie  GameResult = "It's a tie!"
+)
+
+func DetermineResult(user Hand, bot Hand) GameResult {
+	if user == bot {
+		return ResultTie
+	}
+	switch user {
+	case HandRock:
+		if bot == HandScissors {
+			return ResultWin
+		}
+	case HandPaper:
+		if bot == HandRock {
+			return ResultWin
+		}
+	case HandScissors:
+		if bot == HandPaper {
+			return ResultWin
+		}
+	}
+	return ResultLose
+}
+
+type PlayOutput struct {
+	UserHand Hand
+	BotHand  Hand
+	Result   GameResult
+	Score    int
+}
+
+func (s *Service) Play(ctx context.Context, guildID int64, userID int64, userHand Hand) (PlayOutput, error) {
+	botHand, err := RandomHand()
+	if err != nil {
+		return PlayOutput{}, err
+	}
+	result := DetermineResult(userHand, botHand)
+
+	score, _, err := s.repo.GetScore(ctx, guildID, userID)
+	if err != nil {
+		return PlayOutput{}, err
+	}
+	if result == ResultWin {
+		score++
+		if err := s.repo.SetScore(ctx, guildID, userID, score); err != nil {
+			return PlayOutput{}, err
+		}
+	}
+
+	return PlayOutput{
+		UserHand: userHand,
+		BotHand:  botHand,
+		Result:   result,
+		Score:    score,
+	}, nil
+}
+
+func (s *Service) GetScore(ctx context.Context, guildID int64, userID int64) (int, bool, error) {
+	return s.repo.GetScore(ctx, guildID, userID)
+}
+
+func (s *Service) TopScores(ctx context.Context, guildID int64, limit int) ([]rpsrepo.ScoreEntry, error) {
+	return s.repo.TopScores(ctx, guildID, limit)
+}
+
+var ErrGuildOnly = errors.New("guild only")
+

internal/db/services/services.go

@@ -3,19 +3,22 @@ package services
 import (
 	"velox-bot/internal/db/services/level"
 	"velox-bot/internal/db/services/levelsettings"
+	"velox-bot/internal/db/services/rps"
 )
 
 type Services struct {
 	Level         *level.Service
 	LevelSettings *levelsettings.Service
+	RPS           *rps.Service
 }
 
 var Global *Services
 
-func NewServices(level *level.Service, levelSettings *levelsettings.Service) *Services {
+func NewServices(level *level.Service, levelSettings *levelsettings.Service, rps *rps.Service) *Services {
 	s := &Services{
 		Level:         level,
 		LevelSettings: levelSettings,
+		RPS:           rps,
 	}
 	Global = s
 	return s