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package internal
import (
"fmt"
"log"
"os"
"path"
)
type FileLogger struct {
Level LogLevel
File *os.File
}
type LogLevel int8
const (
LOG_NOTSET LogLevel = iota
LOG_INFO
LOG_WARNING
LOG_ERROR
)
func (e LogLevel) String() string {
switch e {
case LOG_NOTSET:
return "NOTSET"
case LOG_INFO:
return "INFO"
case LOG_WARNING:
return "WARNING"
case LOG_ERROR:
return "ERROR"
default:
return "UNKNOWN"
}
}
func (logger *FileLogger) Init(level LogLevel, name string, directory string) error {
configDirErr := EnsureDirectory(directory)
if configDirErr != nil {
return &LogInitializeError{Name: name, Directory: directory, Err: configDirErr}
}
logFile, logOpenErr := os.OpenFile(logger.getFilename(directory, name), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0o666)
if logOpenErr != nil {
return &LogInitializeError{Name: name, Directory: directory, Err: logOpenErr}
}
log.SetOutput(logFile)
logger.File = logFile
logger.Level = level
return nil
}
func (logger *FileLogger) getFilename(directory string, name string) string {
pathString := path.Join(directory, name)
return fmt.Sprintf("%s.log", pathString)
}
func (logger *FileLogger) Log(level LogLevel, str string) {
if level >= logger.Level && logger.Level != LOG_NOTSET {
log.Printf("[%s]: %s", level.String(), str)
}
}
func (logger *FileLogger) Close() {
logger.File.Close()
}
type LogInitializeError struct {
Name string
Directory string
Err error
}
func (e *LogInitializeError) Error() string {
return fmt.Sprintf("failed initializing logging with name: %s and directory: %s with error: %v", e.Name, e.Directory, e.Err)
}
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