package monitor
import (
"strconv"
"strings"
"time"
)
type viewBag struct {
title string
refresh time.Duration
fontURL string
chartJSURL string
customHead string
}
// returns index with new title/refresh
func newIndex(dat viewBag) string {
timeout := dat.refresh.Milliseconds() - timeoutDiff
if timeout < timeoutDiff {
timeout = timeoutDiff
}
ts := strconv.FormatInt(timeout, 10)
replacer := strings.NewReplacer("$TITLE", dat.title, "$TIMEOUT", ts,
"$FONT_URL", dat.fontURL, "$CHART_JS_URL", dat.chartJSURL, "$CUSTOM_HEAD", dat.customHead,
)
return replacer.Replace(indexHTML)
}
const (
defaultTitle = "Fiber Monitor"
defaultRefresh = 3 * time.Second
timeoutDiff = 200 // timeout will be Refresh (in milliseconds) - timeoutDiff
minRefresh = timeoutDiff * time.Millisecond
defaultFontURL = `https://fonts.googleapis.com/css2?family=Roboto:wght@400;900&display=swap`
defaultChartJSURL = `https://cdn.jsdelivr.net/npm/chart.js@2.9/dist/Chart.bundle.min.js`
defaultCustomHead = ``
// parametrized by $TITLE and $TIMEOUT
indexHTML = `
$TITLE
`
)