refactor: logparser v6

logparser/v6/logly/parse/count.go

@@ -0,0 +1,40 @@
+// 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 parse
+
+import "fmt"
+
+// Count the parsed records.
+type Count struct {
+	// Parser is wrapped by Count to count the parsed records.
+	Parser
+	count int
+}
+
+// CountRecords creates a record counter that wraps a parser.
+func CountRecords(p Parser) *Count {
+	return &Count{Parser: p}
+}
+
+// Parse increments the counter.
+func (c *Count) Parse() bool {
+	c.count++
+	return c.Parser.Parse()
+}
+
+// Err returns the first error that was encountered by the Log.
+func (c *Count) Err() (err error) {
+	err = c.Parser.Err()
+	if err != nil {
+		err = fmt.Errorf("record #%d: %v", c.count, err)
+	}
+	return
+}
+
+// You don't need to implement the Value() method.
+// Thanks to interface embedding.

logparser/v6/logly/parse/json.go

@@ -0,0 +1,58 @@
+// 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/logparser/v6/logly/record"
+)
+
+// JSONParser parses json records.
+type JSONParser struct {
+	in   *json.Decoder
+	err  error          // last error
+	last *record.Record // last parsed record
+}
+
+// JSON creates a json parser.
+func JSON(r io.Reader) *JSONParser {
+	return &JSONParser{
+		in:   json.NewDecoder(r),
+		last: new(record.Record),
+	}
+}
+
+// Parse the next line.
+func (p *JSONParser) Parse() bool {
+	if p.err != nil {
+		return false
+	}
+
+	p.last.Reset()
+
+	err := p.in.Decode(&p.last)
+	if err == io.EOF {
+		return false
+	}
+
+	p.err = err
+
+	return err == nil
+}
+
+// Value returns the most recent record parsed by a call to Parse.
+func (p *JSONParser) Value() record.Record {
+	return *p.last
+}
+
+// Err returns the first error that was encountered by the Log.
+func (p *JSONParser) Err() error {
+	return p.err
+}

logparser/v6/logly/parse/parser.go

@@ -0,0 +1,22 @@
+// 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 parse
+
+import "github.com/inancgumus/learngo/logparser/v6/logly/record"
+
+// Parser is an interface for the parsers.
+type Parser interface {
+	// Parse the next record from the source.
+	Parse() bool
+
+	// Value returns the last parsed record by a call to Parse.
+	Value() record.Record
+
+	// Err returns the first error that was encountered.
+	Err() error
+}

logparser/v6/logly/parse/text.go

@@ -0,0 +1,54 @@
+// For more tutorials: https://bp.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package parse
+
+import (
+	"bufio"
+	"io"
+
+	"github.com/inancgumus/learngo/logparser/v6/logly/record"
+)
+
+// TextParser parses text based log lines.
+type TextParser struct {
+	in   *bufio.Scanner
+	err  error          // last error
+	last *record.Record // last parsed record
+}
+
+// Text creates a text parser.
+func Text(r io.Reader) *TextParser {
+	return &TextParser{
+		in:   bufio.NewScanner(r),
+		last: new(record.Record),
+	}
+}
+
+// Parse the next line.
+func (p *TextParser) Parse() bool {
+	if p.err != nil {
+		return false
+	}
+	if !p.in.Scan() {
+		return false
+	}
+
+	p.err = p.last.FromText(p.in.Bytes())
+
+	return true
+}
+
+// Value returns the most recent record parsed by a call to Parse.
+func (p *TextParser) Value() record.Record {
+	return *p.last
+}
+
+// Err returns the first error that was encountered by the Log.
+func (p *TextParser) Err() error {
+	return p.err
+}