gtsocial-umbx

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logger.go (2030B)

      1 package viper
      2 
      3 import (
      4 	"fmt"
      5 
      6 	jww "github.com/spf13/jwalterweatherman"
      7 )
      8 
      9 // Logger is a unified interface for various logging use cases and practices, including:
     10 //   - leveled logging
     11 //   - structured logging
     12 type Logger interface {
     13 	// Trace logs a Trace event.
     14 	//
     15 	// Even more fine-grained information than Debug events.
     16 	// Loggers not supporting this level should fall back to Debug.
     17 	Trace(msg string, keyvals ...interface{})
     18 
     19 	// Debug logs a Debug event.
     20 	//
     21 	// A verbose series of information events.
     22 	// They are useful when debugging the system.
     23 	Debug(msg string, keyvals ...interface{})
     24 
     25 	// Info logs an Info event.
     26 	//
     27 	// General information about what's happening inside the system.
     28 	Info(msg string, keyvals ...interface{})
     29 
     30 	// Warn logs a Warn(ing) event.
     31 	//
     32 	// Non-critical events that should be looked at.
     33 	Warn(msg string, keyvals ...interface{})
     34 
     35 	// Error logs an Error event.
     36 	//
     37 	// Critical events that require immediate attention.
     38 	// Loggers commonly provide Fatal and Panic levels above Error level,
     39 	// but exiting and panicing is out of scope for a logging library.
     40 	Error(msg string, keyvals ...interface{})
     41 }
     42 
     43 type jwwLogger struct{}
     44 
     45 func (jwwLogger) Trace(msg string, keyvals ...interface{}) {
     46 	jww.TRACE.Printf(jwwLogMessage(msg, keyvals...))
     47 }
     48 
     49 func (jwwLogger) Debug(msg string, keyvals ...interface{}) {
     50 	jww.DEBUG.Printf(jwwLogMessage(msg, keyvals...))
     51 }
     52 
     53 func (jwwLogger) Info(msg string, keyvals ...interface{}) {
     54 	jww.INFO.Printf(jwwLogMessage(msg, keyvals...))
     55 }
     56 
     57 func (jwwLogger) Warn(msg string, keyvals ...interface{}) {
     58 	jww.WARN.Printf(jwwLogMessage(msg, keyvals...))
     59 }
     60 
     61 func (jwwLogger) Error(msg string, keyvals ...interface{}) {
     62 	jww.ERROR.Printf(jwwLogMessage(msg, keyvals...))
     63 }
     64 
     65 func jwwLogMessage(msg string, keyvals ...interface{}) string {
     66 	out := msg
     67 
     68 	if len(keyvals) > 0 && len(keyvals)%2 == 1 {
     69 		keyvals = append(keyvals, nil)
     70 	}
     71 
     72 	for i := 0; i <= len(keyvals)-2; i += 2 {
     73 		out = fmt.Sprintf("%s %v=%v", out, keyvals[i], keyvals[i+1])
     74 	}
     75 
     76 	return out
     77 }