package webutility
  
  import (
  	"fmt"
  	"time"
  )
  
  // Timer ...
  type Timer struct {
  	name         string
  	running      bool
  	started      time.Time
  	stopped      time.Time
  	lastDuration time.Duration
  }
  
  // NewTimer ...
  func NewTimer(name string) *Timer {
  	t := &Timer{name: name}
  	t.Reset()
  	return t
  }
  
  // Start ...
  func (t *Timer) Start() time.Time {
  	t.running = true
  	t.started = time.Now()
  	return t.started
  }
  
  // Stop ...
  func (t *Timer) Stop() time.Duration {
  	t.running = false
  	t.stopped = time.Now()
  	t.lastDuration = t.stopped.Sub(t.started)
  	return t.lastDuration
  }
  
  // LastRunDuration ...
  func (t *Timer) LastRunDuration() time.Duration {
  	return t.lastDuration
  }
  
  // Clear ...
  func (t *Timer) Clear() {
  	t.started = time.Now()
  	t.stopped = time.Now()
  	t.lastDuration = 0
  }
  
  // Reset ...
  func (t *Timer) Reset() {
  	t.Stop()
  	t.Start()
  }
  
  // Elapsed ...
  func (t *Timer) Elapsed() time.Duration {
  	if t.running {
  		return time.Now().Sub(t.started)
  	}
  	return 0
  }
  
  // Print ...
  func (t *Timer) Print(s string) {
  	status := "RUNNING"
  	if !t.running {
  		status = "STOPPED"
  	}
  	fmt.Printf("timer[%s][%s]: %v %s
  ", t.name, status, t.Elapsed(), s)
  }
  
  // Lap ...
  func (t *Timer) Lap(s string) {
  	t.Print(s)
  	t.Reset()
  }