Extend archive manager

internal/util/diskUsage.go

@@ -0,0 +1,34 @@
+// Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package util
+
+import (
+	"os"
+
+	"github.com/ClusterCockpit/cc-backend/pkg/log"
+)
+
+func DiskUsage(dirpath string) float64 {
+	var size int64
+
+	dir, err := os.Open(dirpath)
+	if err != nil {
+		log.Errorf("DiskUsage() error: %v", err)
+		return 0
+	}
+	defer dir.Close()
+
+	files, err := dir.Readdir(-1)
+	if err != nil {
+		log.Errorf("DiskUsage() error: %v", err)
+		return 0
+	}
+
+	for _, file := range files {
+		size += file.Size()
+	}
+
+	return float64(size) * 1e-6
+}

internal/util/statistics.go

@@ -0,0 +1,21 @@
+// Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package util
+
+import "golang.org/x/exp/constraints"
+
+func Min[T constraints.Ordered](a, b T) T {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+func Max[T constraints.Ordered](a, b T) T {
+	if a > b {
+		return a
+	}
+	return b
+}