refactor: logparser v5 to pkgs

logparser/v5/pipe/pipe.go

@@ -0,0 +1,29 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package pipe
+
+// YieldFunc yields a record from an Iterator to up-stream (Consumer).
+type YieldFunc = func(Record) error
+
+// Iterator yields a record.
+type Iterator interface {
+	Each(YieldFunc) error
+}
+
+// Consumer consumes records from an iterator.
+type Consumer interface {
+	Consume(Iterator) error
+}
+
+// Transform represents both a record consumer and producer.
+// It has an input and output.
+// It takes a single record and provides an iterator for all the records.
+type Transform interface {
+	Iterator // producer: should never return on yield().err == nil
+	Consumer
+}