Use the registry for filter modules as well

1 files changed, 56 insertions, 0 deletions

diff --git a/filter/str/string.go b/filter/str/string.go
new file mode 100644
index 0000000..0ae407d
--- /dev/null
+++ b/filter/str/string.go
@@ -0,0 +1,56 @@
+package str
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+
+	"github.com/Shugyousha/stasher/work"
+)
+
+type StringFilter struct {
+	FilterFuncMap map[string]func(string) string
+}
+
+func New(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
+}