Files
redka/internal/command/key/exists.go
2024-04-30 02:01:19 +05:00

36 lines
715 B
Go

package key
import (
"github.com/nalgeon/redka/internal/parser"
"github.com/nalgeon/redka/internal/redis"
)
// Determines whether one or more keys exist.
// EXISTS key [key ...]
// https://redis.io/commands/exists
type Exists struct {
redis.BaseCmd
Keys []string
}
func ParseExists(b redis.BaseCmd) (*Exists, error) {
cmd := &Exists{BaseCmd: b}
err := parser.New(
parser.Strings(&cmd.Keys),
).Required(1).Run(cmd.Args())
if err != nil {
return cmd, err
}
return cmd, nil
}
func (cmd *Exists) Run(w redis.Writer, red redis.Redka) (any, error) {
count, err := red.Key().Count(cmd.Keys...)
if err != nil {
w.WriteError(cmd.Error(err))
return nil, err
}
w.WriteInt(count)
return count, nil
}