type SourceSelectionCriteria struct {
	ReplicaModifications ReplicaModifications `xml:"ReplicaModifications" json:"ReplicaModifications"`
}

// IsValid - checks whether SourceSelectionCriteria is valid or not.
func (s SourceSelectionCriteria) IsValid() bool {
	return s.ReplicaModifications.Status == Enabled || s.ReplicaModifications.Status == Disabled
}

// Validate source selection criteria

func (d Destination) isValidStorageClass() bool {
	if d.StorageClass == "" {
		return true
	}
	return d.StorageClass == "STANDARD" || d.StorageClass == "REDUCED_REDUNDANCY"
}

// IsValid - checks whether Destination is valid or not.
func (d Destination) IsValid() bool {
	return d.Bucket != "" || !d.isValidStorageClass()
}

func (d Destination) String() string {
	return d.ARN
}

func (s *peerRESTServer) HealthHandler(w http.ResponseWriter, r *http.Request) {
	s.IsValid(w, r)
}

// VerifyBinary - verifies the downloaded binary is in-tact
func (s *peerRESTServer) VerifyBinaryHandler(w http.ResponseWriter, r *http.Request) {
	if !s.IsValid(w, r) {
		s.writeErrorResponse(w, errors.New("Invalid request"))
		return
	}

	if r.ContentLength < 0 {

}

// ShardSize - returns actual shared size from erasure blockSize.
func (e ErasureInfo) ShardSize() int64 {
	return ceilFrac(e.BlockSize, int64(e.DataBlocks))
}

// IsValid - tells if erasure info fields are valid.
func (fi FileInfo) IsValid() bool {
	if fi.Deleted {
		// Delete marker has no data, no need to check
		// for erasure coding information
		return true
	}
	dataBlocks := fi.Erasure.DataBlocks

	if err := storageServerRequestValidate(r); err != nil {
		s.writeErrorResponse(w, err)
		return false
	}

	return true
}

// IsValid - To authenticate and check if the disk-id in the request corresponds to the underlying disk.
func (s *storageRESTServer) IsValid(w http.ResponseWriter, r *http.Request) bool {
	if !s.IsAuthValid(w, r) {
		return false
	}

	if err := r.ParseForm(); err != nil {

		tags["pool"] = er.poolIndex
		tags["merrs"] = joinErrs(errs)
		tags["derrs"] = joinErrs(dataErrs)
		if m.IsValid() {
			tags["size"] = m.Size
			tags["mtime"] = m.ModTime.Format(http.TimeFormat)
			tags["data"] = m.Erasure.DataBlocks
			tags["parity"] = m.Erasure.ParityBlocks
		} else {
			tags["invalid-meta"] = true
			tags["data"] = er.setDriveCount - er.defaultParityCount
			tags["parity"] = er.defaultParityCount
		}

}

// SetTarget - sets a new minio-go client target for this bucket.
func (sys *BucketTargetSys) SetTarget(ctx context.Context, bucket string, tgt *madmin.BucketTarget, update bool) error {
	if !tgt.Type.IsValid() && !update {
		return BucketRemoteArnTypeInvalid{Bucket: bucket}
	}
	clnt, err := sys.getRemoteTargetClient(tgt)
	if err != nil {
		return BucketRemoteTargetNotFound{Bucket: tgt.TargetBucket, Err: err}
	}

			}
		} else {
			if testCase.expectedErr != nil {
				t.Fatalf("test %v: error: expected = %v, got = <nil>", i+1, testCase.expectedErr)
			}
			if !cred.IsValid() {
				t.Fatalf("test %v: got invalid credentials", i+1)
			}
		}
	}
}

func TestCredentialsEqual(t *testing.T) {
	cred, err := GetNewCredentials()
	if err != nil {

		return quotaCfg, err
	}
	if !quotaCfg.IsValid() {
		if quotaCfg.Type == "fifo" {
			internalLogIf(GlobalContext, errors.New("Detected older 'fifo' quota config, 'fifo' feature is removed and not supported anymore. Please clear your quota configs using 'mc admin bucket quota alias/bucket --clear' and use 'mc ilm add' for expiration of objects"), logger.WarningKind)
			return quotaCfg, fmt.Errorf("invalid quota type 'fifo'")
		}

	type Alias Config
	aux := &struct {
		*Alias
	}{
		Alias: (*Alias)(sCfg),
	}
	return json.Unmarshal(data, &aux)
}

// IsValid - returns true if input string is a valid
// storage class kind supported.
func IsValid(sc string) bool {
	return sc == RRS || sc == STANDARD
}

// UnmarshalText unmarshals storage class from its textual form into
// storageClass structure.