refactor: logparser v5 to pkgs

logparser/v5/pipe/jsonlog.go

@@ -0,0 +1,47 @@
+// For more tutorials: https://bj.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package pipe
+
+import (
+	"encoding/json"
+	"io"
+)
+
+// JSON parses json records.
+type JSON struct {
+	reader io.Reader
+}
+
+// NewJSONLog creates a json parser.
+func NewJSONLog(r io.Reader) *JSON {
+	return &JSON{reader: r}
+}
+
+// Each yields records from a json reader.
+func (j *JSON) Each(yield func(Record) error) error {
+	defer readClose(j.reader)
+
+	dec := json.NewDecoder(j.reader)
+
+	for {
+		var r Record
+
+		err := dec.Decode(&r)
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+		if err := yield(r); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}