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131 lines
2.8 KiB
131 lines
2.8 KiB
package log
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import (
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"context"
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"fmt"
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"io"
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"os"
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"gitoa.ru/go-4devs/log/entry"
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"gitoa.ru/go-4devs/log/field"
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"gitoa.ru/go-4devs/log/internal/buffer"
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)
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// Keys for "built-in" attributes.
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const (
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// TimeKey is the key used by the built-in handlers for the time
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// when the log method is called. The associated Value is a [time.Time].
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KeyTime = "time"
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// LevelKey is the key used by the built-in handlers for the level
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// of the log call. The associated value is a [Level].
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KeyLevel = "level"
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// MessageKey is the key used by the built-in handlers for the
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// message of the log call. The associated value is a string.
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KeyMessage = "msg"
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// SourceKey is the key used by the built-in handlers for the source file
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// and line of the log call. The associated value is a string.
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KeySource = "source"
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// KeyName logger name.
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KeyName = "name"
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)
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func WithWriter(w io.Writer) func(*option) {
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return func(o *option) {
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o.out = w
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}
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}
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func WithStdout() func(*option) {
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return func(o *option) {
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o.out = os.Stdout
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}
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}
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// WithStringFormat sets format as simple string.
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func WithStringFormat() func(*option) {
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return func(o *option) {
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o.format = formatText()
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}
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}
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// WithJSONFormat sets json output format.
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func WithJSONFormat() func(*option) {
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return func(o *option) {
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o.format = formatJSON()
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}
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}
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type option struct {
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format func(io.Writer, *entry.Entry) (int, error)
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out io.Writer
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}
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// New creates standart logger.
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func New(opts ...func(*option)) Logger {
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log := option{
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format: formatText(),
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out: os.Stderr,
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}
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for _, opt := range opts {
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opt(&log)
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}
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return func(_ context.Context, entry *entry.Entry) (int, error) {
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return log.format(log.out, entry)
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}
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}
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func formatText() func(io.Writer, *entry.Entry) (int, error) {
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enc := field.NewEncoderText()
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return func(w io.Writer, entry *entry.Entry) (int, error) {
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buf := buffer.New()
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defer func() {
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buf.Free()
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}()
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*buf = enc.AppendField(*buf, field.String(KeyMessage, entry.Message()))
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for _, field := range entry.Fields() {
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*buf = enc.AppendField(*buf, field)
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}
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_, _ = buf.WriteString("\n")
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n, err := w.Write(*buf)
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if err != nil {
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return 0, fmt.Errorf("format text:%w", err)
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}
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return n, nil
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}
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}
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func formatJSON() func(w io.Writer, entry *entry.Entry) (int, error) {
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enc := field.NewEncoderJSON()
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return func(w io.Writer, entry *entry.Entry) (int, error) {
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buf := buffer.New()
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defer func() {
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buf.Free()
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}()
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_, _ = buf.WriteString("{")
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*buf = enc.AppendField(*buf, field.String(KeyMessage, entry.Message()))
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for _, field := range entry.Fields() {
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*buf = enc.AppendField(*buf, field)
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}
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_, _ = buf.WriteString("}")
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_, _ = buf.WriteString("\n")
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n, err := w.Write(*buf)
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if err != nil {
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return 0, fmt.Errorf("format json:%w", err)
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}
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return n, nil
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}
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}
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