status.go

package main

import (
	"fmt"
	"github.com/izolight/gopoststuff/simplenntp"
	"time"
)

func StatusLogger(ticker *time.Ticker, tdchan chan *simplenntp.TimeData) {
	var tds []*simplenntp.TimeData
	totalPosted := int64(0)

	for t := range ticker.C {
		stamp := t.UnixNano() / 1e6
		tds = append(tds, &simplenntp.TimeData{stamp, 0})

		// Fetch any new TimeData entries
		var breakNow bool
		for {
			breakNow = false

			select {
			case td := <-tdchan:
				// New item, add it to our list
				tds = append(tds, td)
				totalPosted += int64(td.Bytes)
			default:
				// Nothing else in the channel, done for now
				breakNow = true
			}

			if breakNow {
				break
			}
		}

		// Calculate current speed
		if len(tds) > 0 {

			active := float64(tds[len(tds)-1].Milliseconds-tds[0].Milliseconds) / 1000
			totalBytes := 0
			for _, td := range tds {
				totalBytes += td.Bytes
			}

			//speed := float64(totalBytes) / float64(active)
			//speed := float64(totalBytes) / float64(active) / 1024
			speed, speedUnit := prettySize(float64(totalBytes) / float64(active))

			// Total posted
			posted := float64(totalPosted) / 1024 / 1024

			// Print it
			//fmt.Printf("Posted \033[1m%.1f\033[0mMiB - Current speed: \033[1m%.1f\033[0mKiB/s             \r", posted, speed)
			fmt.Printf("Posted \033[1m%.1f\033[0mMiB - Current speed: \033[1m%.1f\033[0m%s/s             \r", posted, speed, speedUnit)

			//log.Debug("Current speed: %.1fKB/s", speed)
		}

		// Trim slice to only use the last 5 seconds
		earliest := stamp - 5000
		start := 0
		for i, td := range tds {
			if td.Milliseconds >= earliest {
				start = i
				break
			}
		}

		tds = tds[start:]
	}
}

func prettySize(b float64) (nb float64, nu string) {
	units := make(map[string]float64)
	units["B"] = 0
	units["KB"] = 1024
	units["MB"] = 1024 * 1024
	units["GB"] = 1024 * 1024 * 1024
	units["TB"] = 1024 * 1024 * 1024 * 1024

	for k, v := range units {
		tspeed := b / v
		if tspeed >= 10.0 && tspeed < 100.0 {
			nb = tspeed
			nu = k
			break
		}
	}
	return nb, nu
}