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package filter
import (
"bytes"
"encoding/json"
"fmt"
"io"
"github.com/Shugyousha/stasher/work"
)
type StringFilter struct {
FilterFuncMap map[string]func(string) string
}
func NewStringFilter(ffmap map[string]func(string) string) *StringFilter {
return &StringFilter{FilterFuncMap: ffmap}
}
func (f *StringFilter) Filter(w *work.Work) *work.Work {
dec := json.NewDecoder(bytes.NewReader(w.Data))
jm := make(map[string]string, 10)
err := dec.Decode(&jm)
if err == io.EOF {
fmt.Printf("EOF jm: %v\n", jm)
return w
}
if err != nil {
fmt.Printf("Error when decoding JSON: %q\n", err)
w.Err = err
return w
}
changed := false
for field, ff := range f.FilterFuncMap {
str, ok := jm[field]
if !ok {
continue
}
jm[field] = ff(str)
changed = true
}
if changed {
bs, err := json.Marshal(jm)
if err != nil {
fmt.Printf("Error when marshalling JSON: %q\n", err)
w.Err = err
} else {
w.Data = bs
}
}
return w
}
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