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unlock-music-cli/algo/common/dispatch.go

32 lines
690 B
Go

package common
import (
"io"
"path/filepath"
"strings"
)
type NewDecoderFunc func(rd io.ReadSeeker) Decoder
type decoderItem struct {
noop bool
decoder NewDecoderFunc
}
var DecoderRegistry = make(map[string][]decoderItem)
func RegisterDecoder(ext string, noop bool, dispatchFunc NewDecoderFunc) {
DecoderRegistry[ext] = append(DecoderRegistry[ext],
decoderItem{noop: noop, decoder: dispatchFunc})
}
func GetDecoder(filename string, skipNoop bool) (rs []NewDecoderFunc) {
ext := strings.ToLower(strings.TrimLeft(filepath.Ext(filename), "."))
for _, dec := range DecoderRegistry[ext] {
if skipNoop && dec.noop {
continue
}
rs = append(rs, dec.decoder)
}
return
}