refactor(backend): 添加 service 缓存端口

backend/internal/repository/email_cache.go

@@ -0,0 +1,48 @@
+package repository
+
+import (
+	"context"
+	"encoding/json"
+	"time"
+
+	"sub2api/internal/service/ports"
+
+	"github.com/redis/go-redis/v9"
+)
+
+const verifyCodeKeyPrefix = "verify_code:"
+
+type emailCache struct {
+	rdb *redis.Client
+}
+
+func NewEmailCache(rdb *redis.Client) ports.EmailCache {
+	return &emailCache{rdb: rdb}
+}
+
+func (c *emailCache) GetVerificationCode(ctx context.Context, email string) (*ports.VerificationCodeData, error) {
+	key := verifyCodeKeyPrefix + email
+	val, err := c.rdb.Get(ctx, key).Result()
+	if err != nil {
+		return nil, err
+	}
+	var data ports.VerificationCodeData
+	if err := json.Unmarshal([]byte(val), &data); err != nil {
+		return nil, err
+	}
+	return &data, nil
+}
+
+func (c *emailCache) SetVerificationCode(ctx context.Context, email string, data *ports.VerificationCodeData, ttl time.Duration) error {
+	key := verifyCodeKeyPrefix + email
+	val, err := json.Marshal(data)
+	if err != nil {
+		return err
+	}
+	return c.rdb.Set(ctx, key, val, ttl).Err()
+}
+
+func (c *emailCache) DeleteVerificationCode(ctx context.Context, email string) error {
+	key := verifyCodeKeyPrefix + email
+	return c.rdb.Del(ctx, key).Err()
+}