Across donut, split, nimble some code cleanup

pkg/donut/acl.go

@@ -0,0 +1,47 @@
+package donut
+
+// BucketACL - bucket level access control
+type BucketACL string
+
+// different types of ACL's currently supported for buckets
+const (
+	BucketPrivate         = BucketACL("private")
+	BucketPublicRead      = BucketACL("public-read")
+	BucketPublicReadWrite = BucketACL("public-read-write")
+)
+
+func (b BucketACL) String() string {
+	return string(b)
+}
+
+// IsPrivate - is acl Private
+func (b BucketACL) IsPrivate() bool {
+	return b == BucketACL("private")
+}
+
+// IsPublicRead - is acl PublicRead
+func (b BucketACL) IsPublicRead() bool {
+	return b == BucketACL("public-read")
+}
+
+// IsPublicReadWrite - is acl PublicReadWrite
+func (b BucketACL) IsPublicReadWrite() bool {
+	return b == BucketACL("public-read-write")
+}
+
+// IsValidBucketACL - is provided acl string supported
+func IsValidBucketACL(acl string) bool {
+	switch acl {
+	case "private":
+		fallthrough
+	case "public-read":
+		fallthrough
+	case "public-read-write":
+		return true
+	case "":
+		// by default its "private"
+		return true
+	default:
+		return false
+	}
+}