refactor: oop log parser to pkgs

interfaces/log-parser/oop/pipe/parse/json.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 parse
+
+import (
+	"encoding/json"
+	"io"
+
+	"github.com/inancgumus/learngo/interfaces/log-parser/oop/pipe"
+)
+
+// JSON parses json records.
+type JSON struct {
+	reader io.Reader
+}
+
+// FromJSON creates a json parser.
+func FromJSON(r io.Reader) *JSON {
+	return &JSON{reader: r}
+}
+
+// Each yields records from a json reader.
+func (j *JSON) Each(yield func(pipe.Record)) 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
+		}
+
+		yield(r)
+	}
+	return nil
+}