add bracket format

.golangci.yml

@@ -73,3 +73,4 @@ issues:
     - path: example/*
       linters:
         - gomnd
+        - lll

example/log.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"time"
 
 	"gitoa.ru/go-4devs/log"
 	"gitoa.ru/go-4devs/log/field"
@@ -16,9 +17,13 @@ func main() {
 	log.Err(ctx, "error message", 42)
 	service(ctx, log.Log())
 
-	logger := log.New(log.WithJSONFormat()).With(log.WithSource(10, log.TrimPath))
+	logger := log.New(log.WithJSONFormat()).With(log.WithSource(10, log.TrimPath), log.WithTime(log.KeyTime, time.RFC3339))
 	logger.AlertKV(ctx, "alert message new logger", field.String("string", "value"))
 	service(ctx, logger)
+
+	strLogger := log.New(log.WithFormat(log.FormatWithBracket())).With(log.WithSource(10, log.TrimPath), log.WithTime(log.KeyTime, time.RFC3339))
+	strLogger.AlertKV(ctx, "alert message new txt logger", field.String("string", "value"))
+	service(ctx, strLogger)
 }
 
 func service(ctx context.Context, logger log.Logger) {

field/field.go

@@ -501,3 +501,14 @@ type Field struct {
 func (f Field) String() string {
 	return fmt.Sprintf("%s=%+v", f.Key, f.Value)
 }
+
+// String implent stringer.
+func (f Field) IsKey(keys ...string) bool {
+	for _, key := range keys {
+		if key == f.Key {
+			return true
+		}
+	}
+
+	return false
+}

global.go

@@ -3,6 +3,7 @@ package log
 import (
 	"context"
 	"io"
+	"time"
 
 	"gitoa.ru/go-4devs/log/field"
 	"gitoa.ru/go-4devs/log/level"
@@ -10,6 +11,7 @@ import (
 
 //nolint:gochecknoglobals,gomnd
 var global = With(New(),
+	WithTime(KeyTime, time.RFC3339),
 	WithSource(2, TrimPath),
 	WithLevel(KeyLevel, level.Debug),
 	WithExit(level.Alert),

writer_example_test.go

@@ -0,0 +1,36 @@
+package log_test
+
+import (
+	"context"
+	"math"
+	"path/filepath"
+	"time"
+
+	"gitoa.ru/go-4devs/log"
+	"gitoa.ru/go-4devs/log/entry"
+	"gitoa.ru/go-4devs/log/field"
+	"gitoa.ru/go-4devs/log/level"
+)
+
+func exampleWithTime(key, format string) log.Middleware {
+	return func(ctx context.Context, e *entry.Entry, handler log.Logger) (int, error) {
+		return handler(ctx, e.Add(field.FormatTime(key, format, time.Unix(math.MaxInt32, 0))))
+	}
+}
+
+func ExampleFormatWithBracket() {
+	ctx := context.Background()
+	logger := log.New(log.WithFormat(log.FormatWithBracket()), log.WithStdout()).With(
+		log.WithSource(10, filepath.Base),
+		exampleWithTime(log.KeyTime, time.RFC3339), //log.WithTime(log.KeyTime, time.RFC3339),
+		log.WithLevel(log.KeyLevel, level.Info),
+	)
+
+	logger.InfoKV(ctx, "imfo message", field.Int64("num", 42))
+
+	serviceLogger := logger.With(log.WithName("service_name"))
+	serviceLogger.Err(ctx, "error message")
+	// Output:
+	// 2038-01-19T06:14:07+03:00 [info] writer_example_test.go:29 "imfo message" num=42
+	// 2038-01-19T06:14:07+03:00 [error][service_name] writer_example_test.go:32 "error message"
+}

writter.go

@@ -43,15 +43,18 @@ func WithStdout() func(*option) {
 
 // WithStringFormat sets format as simple string.
 func WithStringFormat() func(*option) {
-	return func(o *option) {
+	return WithFormat(formatString())
-		o.format = formatText()
-	}
 }
 
 // WithJSONFormat sets json output format.
 func WithJSONFormat() func(*option) {
+	return WithFormat(formatJSON())
+}
+
+// WithFormat sets custom output format.
+func WithFormat(format func(io.Writer, *entry.Entry) (int, error)) func(*option) {
 	return func(o *option) {
-		o.format = formatJSON()
+		o.format = format
 	}
 }
 
@@ -63,7 +66,7 @@ type option struct {
 // New creates standart logger.
 func New(opts ...func(*option)) Logger {
 	log := option{
-		format: formatText(),
+		format: formatString(),
 		out:    os.Stderr,
 	}
 
@@ -76,7 +79,61 @@ func New(opts ...func(*option)) Logger {
 	}
 }
 
-func formatText() func(io.Writer, *entry.Entry) (int, error) {
+func FormatWithBracket() func(io.Writer, *entry.Entry) (int, error) {
+	enc := field.NewEncoderText()
+
+	appendValue := func(buf *buffer.Buffer, data field.Fields, key, prefix, suffix string) *buffer.Buffer {
+		data.Fields(
+			func(f field.Field) bool {
+				if f.IsKey(key) {
+					_, _ = buf.WriteString(prefix)
+					*buf = enc.AppendValue(*buf, f.Value)
+					_, _ = buf.WriteString(suffix)
+
+					return false
+				}
+
+				return true
+			})
+
+		return buf
+	}
+
+	return func(w io.Writer, data *entry.Entry) (int, error) {
+		buf := buffer.New()
+		defer func() {
+			buf.Free()
+		}()
+
+		fields := data.Fields()
+		buf = appendValue(buf, fields, KeyTime, "", " ")
+		_, _ = buf.WriteString("[")
+		*buf = enc.AppendValue(*buf, field.StringValue(data.Level().String()))
+		_, _ = buf.WriteString("]")
+		buf = appendValue(buf, fields, KeyName, "[", "]")
+		buf = appendValue(buf, fields, KeySource, " ", " ")
+		*buf = enc.AppendValue(*buf, field.StringValue(data.Message()))
+
+		fields.Fields(func(f field.Field) bool {
+			if !f.IsKey(KeyTime, KeySource, KeyName, KeyLevel) {
+				*buf = enc.AppendField(*buf, f)
+			}
+
+			return true
+		})
+
+		_, _ = buf.WriteString("\n")
+
+		n, err := w.Write(*buf)
+		if err != nil {
+			return 0, fmt.Errorf("format text:%w", err)
+		}
+
+		return n, nil
+	}
+}
+
+func formatString() func(io.Writer, *entry.Entry) (int, error) {
 	enc := field.NewEncoderText()
 
 	return func(w io.Writer, entry *entry.Entry) (int, error) {