package entities

import (
	"database/sql/driver"
	"encoding/json"
	"fmt"
)

// StringSlice is a custom type for []string that implements sql.Scanner and driver.Valuer
type StringSlice []string

// Scan implements the sql.Scanner interface for StringSlice
func (s *StringSlice) Scan(value interface{}) error {
	if value == nil {
		*s = StringSlice{}
		return nil
	}

	var bytes []byte
	switch v := value.(type) {
	case []byte:
		bytes = v
	case string:
		bytes = []byte(v)
	default:
		return fmt.Errorf("cannot scan %T into StringSlice", value)
	}

	return json.Unmarshal(bytes, s)
}

// Value implements the driver.Valuer interface for StringSlice
func (s StringSlice) Value() (driver.Value, error) {
	if s == nil {
		return nil, nil
	}
	return json.Marshal(s)
}