proxy ver1

pkg/logger/logger.go

@@ -0,0 +1,60 @@
+package logger
+
+import (
+	"fmt"
+
+	"github.com/mgutz/ansi"
+)
+
+type Logger interface {
+	Trace(f string, args ...interface{})
+	Debug(f string, args ...interface{})
+	Info(f string, args ...interface{})
+	Warn(f string, args ...interface{})
+}
+
+type NullLogger struct{}
+
+func (n NullLogger) Trace(f string, args ...interface{}) {}
+
+func (n NullLogger) Debug(f string, args ...interface{}) {}
+
+func (n NullLogger) Info(f string, args ...interface{}) {}
+
+func (n NullLogger) Warn(f string, args ...interface{}) {}
+
+type ColorLogger struct {
+	VeryVerbose bool
+	Verbose     bool
+	Prefix      string
+	Color       bool
+}
+
+func (c ColorLogger) Trace(f string, args ...interface{}) {
+	if !c.VeryVerbose {
+		return
+	}
+	c.output("blue", f, args...)
+}
+
+func (c ColorLogger) Debug(f string, args ...interface{}) {
+	if !c.Verbose {
+		return
+	}
+	c.output("green", f, args...)
+}
+
+func (c ColorLogger) Info(f string, args ...interface{}) {
+	c.output("green", f, args...)
+}
+
+func (c ColorLogger) Warn(f string, args ...interface{}) {
+	c.output("red", f, args...)
+}
+
+func (c ColorLogger) output(color, f string, args ...interface{}) {
+	if c.Color && color != "" {
+		f = ansi.Color(f, color)
+	}
+	fmt.Printf(fmt.Sprintf("%s%s\n", c.Prefix, f), args...)
+}