Add server-stats widget

internal/glance/templates.go

@@ -1,10 +1,10 @@
 package glance
 
 import (
+	"fmt"
 	"html/template"
 	"math"
 	"strconv"
-	"time"
 
 	"golang.org/x/text/language"
 	"golang.org/x/text/message"
@@ -27,9 +27,31 @@ var globalTemplateFunctions = template.FuncMap{
 	"formatPrice": func(price float64) string {
 		return intl.Sprintf("%.2f", price)
 	},
-	"dynamicRelativeTimeAttrs": func(t time.Time) template.HTMLAttr {
+	"dynamicRelativeTimeAttrs": func(t interface{ Unix() int64 }) template.HTMLAttr {
 		return template.HTMLAttr(`data-dynamic-relative-time="` + strconv.FormatInt(t.Unix(), 10) + `"`)
 	},
+	"formatServerMegabytes": func(mb uint64) template.HTML {
+		var value string
+		var label string
+
+		if mb < 1_000 {
+			value = strconv.FormatUint(mb, 10)
+			label = "MB"
+		} else if mb < 1_000_000 {
+			if mb < 10_000 {
+				value = fmt.Sprintf("%.1f", float64(mb)/1_000)
+			} else {
+				value = strconv.FormatUint(mb/1_000, 10)
+			}
+
+			label = "GB"
+		} else {
+			value = fmt.Sprintf("%.1f", float64(mb)/1_000_000)
+			label = "TB"
+		}
+
+		return template.HTML(value + ` <span class="color-base size-h5">` + label + `</span>`)
+	},
 }
 
 func mustParseTemplate(primary string, dependencies ...string) *template.Template {