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package hook
import (
"bufio"
"io"
"tunnel/pkg/server/queue"
"unicode"
)
func alpha(cb func(rune) rune) Func {
return func(rq, wq queue.Q) error {
r := bufio.NewReader(rq.Reader())
for {
c, _, err := r.ReadRune()
if err != nil {
if err == io.EOF {
break
}
return err
}
wq <- []byte(string(cb(c)))
}
return nil
}
}
func init() {
registerFunc("lower", "lowercase filter out/", alpha(unicode.ToLower))
registerFunc("upper", "uppercase filter out/", alpha(unicode.ToUpper))
}
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