初始化斗地主残局版项目

app/internal/game/errors.go

@@ -0,0 +1,34 @@
+package game
+
+import (
+	"crypto/rand"
+	"doudizhu-server/internal/models"
+	"encoding/hex"
+	"errors"
+	"fmt"
+)
+
+var (
+	ErrRoomNotFound     = errors.New("room not found")
+	ErrRoomFull         = errors.New("room is full")
+	ErrGameStarted      = errors.New("game already started")
+	ErrGameNotStarted   = errors.New("game not started")
+	ErrPlayerNotFound   = errors.New("player not found")
+	ErrNotEnoughPlayers = errors.New("not enough players")
+	ErrPlayerNotReady   = errors.New("player not ready")
+	ErrNotYourTurn      = errors.New("not your turn")
+	ErrCardsNotInHand   = errors.New("cards not in hand")
+	ErrInvalidCardType  = errors.New("invalid card type")
+	ErrCannotBeat       = errors.New("cannot beat last play")
+	ErrCannotPass       = errors.New("cannot pass")
+)
+
+func generateID() string {
+	b := make([]byte, 8)
+	rand.Read(b)
+	return hex.EncodeToString(b)
+}
+
+func cardKey(c models.Card) string {
+	return fmt.Sprintf("%d_%d", c.Suit, c.Value)
+}