59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package loggers
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import (
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"fmt"
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"io"
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"os"
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"time"
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"github.com/haydenhargreaves/Potion/internal/infrastructure/logging"
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)
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type FileLogger struct {
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writer io.Writer
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filter logging.LogLevel
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}
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var _ logging.Logger = (*FileLogger)(nil)
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// NewFileLogger creates a new file logger, opened on the filepath provided. If any errors
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// occur, an error will be returned, along with an EMPTY logger. This is not a pointer return
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// so it will never be nil, just empty.
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//
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// This function does not close the file, cleanup function that is returned should be called
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// to close the file opened in this function.
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func NewFileLogger(filepath string, filter logging.LogLevel) (logging.Logger, func() error, error) {
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f, err := os.OpenFile(filepath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
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if err != nil {
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return &FileLogger{}, nil, err
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}
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if f == nil {
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return &FileLogger{}, nil, fmt.Errorf("File could not be opened. File is nil.")
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}
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logger := &FileLogger{
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writer: f,
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filter: filter,
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}
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cleanup := func() error {
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return f.Close()
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}
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return logger, cleanup, nil
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}
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// Log implements the interface.
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func (l *FileLogger) Log(level logging.LogLevel, format string, v ...any) {
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// level is too low, do not log
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if !l.filter.MatchFilter(level) {
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return
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}
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timestamp := time.Now().UTC().Format("01/02/2006 - 15:04:05")
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fullFormat := fmt.Sprintf("%-13s %s | %s\n", "["+level+"]", timestamp, format)
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bytes := fmt.Appendf(nil, fullFormat, v...)
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l.writer.Write(bytes)
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}
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