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package widgets
import (
"fmt"
"log"
"math"
"strconv"
"time"
"github.com/VictoriaMetrics/metrics"
"github.com/distatus/battery"
ui "github.com/xxxserxxx/gotop/v4/termui"
)
type BatteryWidget struct {
*ui.LineGraph
updateInterval time.Duration
}
func NewBatteryWidget(horizontalScale int) *BatteryWidget {
self := &BatteryWidget{
LineGraph: ui.NewLineGraph(),
updateInterval: time.Minute,
}
self.Title = tr.Value("widget.label.battery")
self.HorizontalScale = horizontalScale
// intentional duplicate
// adds 2 datapoints to the graph, otherwise the dot is difficult to see
self.update()
self.update()
go func() {
for range time.NewTicker(self.updateInterval).C {
self.Lock()
self.update()
self.Unlock()
}
}()
return self
}
func (b *BatteryWidget) EnableMetric() {
bats, err := battery.GetAll()
if err != nil {
log.Printf(tr.Value("error.metricsetup", "batt", err.Error()))
return
}
for i, _ := range bats {
id := makeID(i)
metrics.NewGauge(makeName("battery", i), func() float64 {
if ds, ok := b.Data[id]; ok {
return ds[len(ds)-1]
}
return 0.0
})
}
}
func makeID(i int) string {
return tr.Value("widget.label.batt") + strconv.Itoa(i)
}
func (b *BatteryWidget) Scale(i int) {
b.LineGraph.HorizontalScale = i
}
func (b *BatteryWidget) update() {
batteries, err := battery.GetAll()
if err != nil {
switch errt := err.(type) {
case battery.ErrFatal:
log.Printf(tr.Value("error.fatalfetch", "batt", err.Error()))
return
case battery.Errors:
batts := make([]*battery.Battery, 0)
for i, e := range errt {
if e == nil {
batts = append(batts, batteries[i])
} else {
log.Printf(tr.Value("error.recovfetch"), "batt", e.Error())
}
}
if len(batts) < 1 {
log.Print(tr.Value("error.nodevfound", "batt"))
return
}
batteries = batts
}
}
for i, battery := range batteries {
id := makeID(i)
perc := battery.Current / battery.Full
percentFull := math.Abs(perc) * 100.0
// TODO: look into this sort of thing; doesn't the array grow forever? Is the widget library truncating it?
b.Data[id] = append(b.Data[id], percentFull)
b.Labels[id] = fmt.Sprintf("%3.0f%% %.0f/%.0f", percentFull, math.Abs(battery.Current), math.Abs(battery.Full))
}
}
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