/
scanner.go
70 lines (59 loc) · 1.15 KB
/
scanner.go
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package main
import (
"io"
"strings"
"github.com/ymotongpoo/goltsv"
)
type LTSVScanner struct {
OutputDelimiter string
RemainLTSV bool
keys []string
text string
err error
reader *goltsv.LTSVReader
}
func NewLTSVScanner(keys []string, r io.Reader) *LTSVScanner {
return <SVScanner{
OutputDelimiter: "\t",
keys: keys,
reader: goltsv.NewReader(r),
}
}
func (l *LTSVScanner) Err() error {
if l.err == io.EOF {
return nil
}
return l.err
}
func (l *LTSVScanner) Bytes() []byte {
return []byte(l.text)
}
func (l *LTSVScanner) Text() string {
return l.text
}
func (l *LTSVScanner) Scan() bool {
if l.err != nil {
return false
}
recode, err := l.reader.Read()
if err != nil {
l.err = err
l.text = ""
return false
}
switch {
case l.RemainLTSV:
var fields []string
for _, key := range l.keys {
fields = append(fields, key+":"+recode[key])
}
l.text = strings.Join(fields, "\t")
default:
var values []string
for _, key := range l.keys {
values = append(values, recode[key])
}
l.text = strings.Join(values, l.OutputDelimiter)
}
return true
}