bump copyright, added stats page and updated dependencies

pkg/server/helper.go

@@ -1,9 +1,12 @@
-// Copyright (C) 2019 Marius Schellenberger
+// Copyright (C) 2020 Marius Schellenberger
 
 package server
 
 import (
 	"errors"
+	"git.giftfish.de/ston1th/gowiki/pkg/core"
+	bleve "git.giftfish.de/ston1th/gowiki/pkg/index"
+	"runtime"
 	"strconv"
 	"time"
 )
@@ -12,6 +15,8 @@ const (
 	day = time.Hour * 24
 	min = time.Second * 30
 	max = day * 90
+
+	div = 1048576
 )
 
 func duration(duration, mode string) (d time.Duration, err error) {
@@ -43,3 +48,19 @@ func duration(duration, mode string) (d time.Duration, err error) {
 	}
 	return
 }
+
+func fmtMem(i uint64) string {
+	return strconv.FormatFloat(float64(i)/div, 'f', 2, 64)
+}
+
+func getStats(i *bleve.Index) *core.Stats {
+	mem := new(runtime.MemStats)
+	runtime.ReadMemStats(mem)
+	return &core.Stats{
+		Goroutines: runtime.NumGoroutine(),
+		Alloc:      fmtMem(mem.Alloc),
+		Sys:        fmtMem(mem.Sys),
+		Docs:       i.DocCount(),
+		GoVersion:  runtime.Version(),
+	}
+}