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package widgets
import (
"fmt"
"time"
"github.com/cjbassi/gotop/src/utils"
ui "github.com/cjbassi/termui"
psNet "github.com/shirou/gopsutil/net"
)
type Net struct {
*ui.Sparklines
interval time.Duration
// used to calculate recent network activity
prevRecvTotal uint64
prevSentTotal uint64
}
func NewNet() *Net {
recv := ui.NewSparkline()
recv.Data = []int{0}
sent := ui.NewSparkline()
sent.Data = []int{0}
spark := ui.NewSparklines(recv, sent)
self := &Net{
Sparklines: spark,
interval: time.Second,
}
self.Label = "Network Usage"
self.update()
ticker := time.NewTicker(self.interval)
go func() {
for range ticker.C {
self.update()
}
}()
return self
}
func (self *Net) update() {
// `false` causes psutil to group all network activity
interfaces, _ := psNet.IOCounters(false)
curRecvTotal := interfaces[0].BytesRecv
curSentTotal := interfaces[0].BytesSent
if self.prevRecvTotal != 0 { // if this isn't the first update
recvRecent := curRecvTotal - self.prevRecvTotal
sentRecent := curSentTotal - self.prevSentTotal
self.Lines[0].Data = append(self.Lines[0].Data, int(recvRecent))
self.Lines[1].Data = append(self.Lines[1].Data, int(sentRecent))
if int(recvRecent) < 0 || int(sentRecent) < 0 {
utils.Error("net data",
fmt.Sprint(
"curRecvTotal: ", curRecvTotal, "\n",
"curSentTotal: ", curSentTotal, "\n",
"self.prevRecvTotal: ", self.prevRecvTotal, "\n",
"self.prevSentTotal: ", self.prevSentTotal, "\n",
"recvRecent: ", recvRecent, "\n",
"sentRecent: ", sentRecent, "\n",
"int(recvRecent): ", int(recvRecent), "\n",
"int(sentRecent): ", int(sentRecent),
))
}
}
// used in later calls to update
self.prevRecvTotal = curRecvTotal
self.prevSentTotal = curSentTotal
// render widget titles
for i := 0; i < 2; i++ {
var method string // either 'Rx' or 'Tx'
var total float64
recent := self.Lines[i].Data[len(self.Lines[i].Data)-1]
if i == 0 {
total = float64(curRecvTotal)
method = "Rx"
} else {
total = float64(curSentTotal)
method = "Tx"
}
recentFloat, unitRecent := utils.ConvertBytes(uint64(recent))
recent = int(recentFloat)
total, unitTotal := utils.ConvertBytes(uint64(total))
self.Lines[i].Title1 = fmt.Sprintf(" Total %s: %5.1f %s", method, total, unitTotal)
self.Lines[i].Title2 = fmt.Sprintf(" %s/s: %9d %2s/s", method, recent, unitRecent)
}
}
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