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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package mlog
import (
"bytes"
"strings"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
// Implementation of zapcore.Core to interpret log messages from a standard logger
// and translate the levels to zapcore levels.
type stdLogLevelInterpreterCore struct {
wrappedCore zapcore.Core
}
func stdLogInterpretZapEntry(entry zapcore.Entry) zapcore.Entry {
message := entry.Message
if strings.Index(message, "[DEBUG]") == 0 {
entry.Level = zapcore.DebugLevel
entry.Message = message[7:]
} else if strings.Index(message, "[DEBG]") == 0 {
entry.Level = zapcore.DebugLevel
entry.Message = message[6:]
} else if strings.Index(message, "[WARN]") == 0 {
entry.Level = zapcore.WarnLevel
entry.Message = message[6:]
} else if strings.Index(message, "[ERROR]") == 0 {
entry.Level = zapcore.ErrorLevel
entry.Message = message[7:]
} else if strings.Index(message, "[EROR]") == 0 {
entry.Level = zapcore.ErrorLevel
entry.Message = message[6:]
} else if strings.Index(message, "[ERR]") == 0 {
entry.Level = zapcore.ErrorLevel
entry.Message = message[5:]
} else if strings.Index(message, "[INFO]") == 0 {
entry.Level = zapcore.InfoLevel
entry.Message = message[6:]
}
return entry
}
func (s *stdLogLevelInterpreterCore) Enabled(lvl zapcore.Level) bool {
return s.wrappedCore.Enabled(lvl)
}
func (s *stdLogLevelInterpreterCore) With(fields []zapcore.Field) zapcore.Core {
return s.wrappedCore.With(fields)
}
func (s *stdLogLevelInterpreterCore) Check(entry zapcore.Entry, checkedEntry *zapcore.CheckedEntry) *zapcore.CheckedEntry {
entry = stdLogInterpretZapEntry(entry)
return s.wrappedCore.Check(entry, checkedEntry)
}
func (s *stdLogLevelInterpreterCore) Write(entry zapcore.Entry, fields []zapcore.Field) error {
entry = stdLogInterpretZapEntry(entry)
return s.wrappedCore.Write(entry, fields)
}
func (s *stdLogLevelInterpreterCore) Sync() error {
return s.wrappedCore.Sync()
}
func getStdLogOption() zap.Option {
return zap.WrapCore(
func(core zapcore.Core) zapcore.Core {
return &stdLogLevelInterpreterCore{core}
},
)
}
type loggerWriter struct {
logFunc func(msg string, fields ...Field)
}
func (l *loggerWriter) Write(p []byte) (int, error) {
trimmed := string(bytes.TrimSpace(p))
for _, line := range strings.Split(trimmed, "\n") {
l.logFunc(line)
}
return len(p), nil
}
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