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package derive
import (
"fmt"
"regexp"
)
type CompressionAlgo string
const (
// compression algo types
Zlib CompressionAlgo = "zlib"
Brotli9 CompressionAlgo = "brotli-9"
Brotli10 CompressionAlgo = "brotli-10"
Brotli11 CompressionAlgo = "brotli-11"
)
var CompressionAlgoTypes = []CompressionAlgo{
Zlib,
Brotli9,
Brotli10,
Brotli11,
}
var brotliRegexp = regexp.MustCompile(`^brotli-(9|10|11)$`)
func (algo CompressionAlgo) String() string {
return string(algo)
}
func (algo *CompressionAlgo) Set(value string) error {
if !ValidCompressionAlgoType(CompressionAlgo(value)) {
return fmt.Errorf("unknown compression algo type: %q", value)
}
*algo = CompressionAlgo(value)
return nil
}
func (algo *CompressionAlgo) Clone() any {
cpy := *algo
return &cpy
}
func (algo *CompressionAlgo) IsBrotli() bool {
return brotliRegexp.MatchString(algo.String())
}
func GetBrotliLevel(algo CompressionAlgo) int {
switch algo {
case Brotli9:
return 9
case Brotli10:
return 10
case Brotli11:
return 11
default:
panic("Unsupported brotli level")
}
}
func ValidCompressionAlgoType(value CompressionAlgo) bool {
for _, k := range CompressionAlgoTypes {
if k == value {
return true
}
}
return false
}