Direct-delivery: Fix slices in direct notifier

There was a bug in direct notifier that caused only subset of
notification was sent to client. The first iteration over notification
replaced original notification slice with just first "page". This caused
that only one "page" was sent and rest was ignored.

This commit fixes amqp and stomp direct notification delivery.

Signed-off-by: Ales Raszka <araszka@redhat.com>

notifier/amqp/directdeliverer.go

@@ -85,6 +85,7 @@ func (d *DirectDeliverer) Deliver(ctx context.Context, _ uuid.UUID) error {
 
 	var buf bytes.Buffer
 	enc := json.NewEncoder(&buf)
+	var currentBlock []notifier.Notification
 	for bs, be := 0, rollup; bs < len(d.n); bs, be = be, be+rollup {
 		buf.Reset()
 		// if block-end exceeds array bounds, slice block underflow.
@@ -93,8 +94,8 @@ func (d *DirectDeliverer) Deliver(ctx context.Context, _ uuid.UUID) error {
 			be = len(d.n)
 		}
 
-		d.n = d.n[bs:be]
-		err := enc.Encode(&d.n)
+		currentBlock = d.n[bs:be]
+		err := enc.Encode(&currentBlock)
 		if err != nil {
 			ch.TxRollback()
 			return &clairerror.ErrDeliveryFailed{err}

notifier/stomp/directdeliverer.go

@@ -75,6 +75,7 @@ func (d *DirectDeliverer) Deliver(ctx context.Context, nID uuid.UUID) error {
 
 	var buf bytes.Buffer
 	enc := json.NewEncoder(&buf)
+	var currentBlock []notifier.Notification
 	for bs, be := 0, rollup; bs < len(d.n); bs, be = be, be+rollup {
 		buf.Reset()
 		// if block-end exceeds array bounds, slice block underflow.
@@ -83,8 +84,8 @@ func (d *DirectDeliverer) Deliver(ctx context.Context, nID uuid.UUID) error {
 			be = len(d.n)
 		}
 
-		d.n = d.n[bs:be]
-		err := enc.Encode(&d.n)
+		currentBlock = d.n[bs:be]
+		err := enc.Encode(&currentBlock)
 		if err != nil {
 			tx.Abort()
 			return &clairerror.ErrDeliveryFailed{err}