169 lines
3.4 KiB
Go
169 lines
3.4 KiB
Go
// Copyright © 2016 SurrealDB Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package log
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import (
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"bytes"
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"fmt"
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"sort"
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"strings"
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"time"
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"github.com/mgutz/ansi"
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"github.com/sirupsen/logrus"
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)
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const clear = ansi.Reset
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type TextFormatter struct {
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IgnoreFields []string
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TimestampFormat string
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}
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func (f *TextFormatter) ignore(field string) bool {
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for _, ignore := range f.IgnoreFields {
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if field == ignore {
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return true
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}
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}
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return false
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}
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func (f *TextFormatter) include(field string) bool {
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for _, ignore := range f.IgnoreFields {
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if field == ignore {
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return false
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}
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}
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return true
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}
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func (f *TextFormatter) Format(entry *logrus.Entry) ([]byte, error) {
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if f.TimestampFormat == "" {
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f.TimestampFormat = time.RFC3339Nano
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}
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var keys []string = make([]string, 0)
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for k := range entry.Data {
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if f.include(k) {
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keys = append(keys, k)
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}
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}
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sort.Strings(keys)
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b := &bytes.Buffer{}
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switch isColoured {
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case false:
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f.printBasic(b, entry, keys)
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case true:
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f.printColored(b, entry, keys)
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}
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b.WriteByte('\n')
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return b.Bytes(), nil
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}
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func (f *TextFormatter) printField(b *bytes.Buffer, key string, value interface{}) {
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b.WriteString(key)
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b.WriteByte('=')
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switch value := value.(type) {
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case string:
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if needsQuoting(value) {
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b.WriteString(value)
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} else {
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fmt.Fprintf(b, "%q", value)
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}
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case error:
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errmsg := value.Error()
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if needsQuoting(errmsg) {
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b.WriteString(errmsg)
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} else {
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fmt.Fprintf(b, "%q", value)
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}
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default:
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fmt.Fprint(b, value)
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}
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b.WriteByte(' ')
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}
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func (f *TextFormatter) printBasic(b *bytes.Buffer, entry *logrus.Entry, keys []string) {
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f.printField(b, "time", entry.Time.Format(f.TimestampFormat))
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f.printField(b, "level", entry.Level.String())
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f.printField(b, "msg", entry.Message)
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for _, key := range keys {
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f.printField(b, key, entry.Data[key])
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}
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}
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func (f *TextFormatter) printColored(b *bytes.Buffer, entry *logrus.Entry, keys []string) {
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var color string
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var prefix string
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switch entry.Level {
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case logrus.TraceLevel:
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color = ansi.White
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case logrus.DebugLevel:
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color = ansi.Magenta
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case logrus.InfoLevel:
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color = ansi.Blue
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case logrus.WarnLevel:
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color = ansi.Yellow
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case logrus.ErrorLevel:
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color = ansi.Red
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case logrus.FatalLevel:
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color = ansi.Red
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case logrus.PanicLevel:
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color = ansi.Red
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default:
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color = ansi.Blue
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}
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level := strings.ToUpper(entry.Level.String())[0:4]
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if value, ok := entry.Data["prefix"]; ok {
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prefix = fmt.Sprint(" ", ansi.Cyan, value, ":", clear)
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}
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fmt.Fprintf(b, "%s[%s]%s %s%+5s%s%s %s", ansi.LightBlack, entry.Time.Format(f.TimestampFormat), clear, color, level, clear, prefix, entry.Message)
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for _, k := range keys {
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fmt.Fprintf(b, " %s%s%s=%+v", color, k, clear, entry.Data[k])
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}
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}
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func needsQuoting(text string) bool {
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for _, ch := range text {
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if !((ch >= 'a' && ch <= 'z') ||
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(ch >= 'A' && ch <= 'Z') ||
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(ch >= '0' && ch <= '9') ||
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ch == '-' || ch == '.') {
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return false
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}
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}
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return true
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}
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