notifier: remove first update constraint

Claircore will limit the number of returned update diffs now. The check
to determine if the first update operation is encountered is no longer
needed.

Signed-off-by: ldelossa <ldelossa@redhat.com>

notifier/processor.go

@@ -10,6 +10,7 @@ import (
 	"github.com/quay/clair/v4/indexer"
 	"github.com/quay/clair/v4/matcher"
 	"github.com/quay/claircore"
+	"github.com/quay/claircore/libvuln/driver"
 	"github.com/quay/claircore/pkg/distlock"
 	"github.com/rs/zerolog"
 )
@@ -217,13 +218,17 @@ func (p *Processor) safe(ctx context.Context, e Event) (bool, uuid.UUID) {
 	}
 
 	uos := all[e.updater]
-	n := len(uos)
-	if n < 2 {
-		log.Info().Msg("encountered first update operation. will not process notifications")
-		return false, uuid.Nil
+
+	var current driver.UpdateOperation
+	var prev driver.UpdateOperation
+
+	if len(uos) == 1 {
+		current = uos[0]
+		prev.Ref = uuid.Nil
+	} else {
+		current, prev = uos[0], uos[1]
 	}
 
-	current, prev := uos[0], uos[1]
 	if current.Ref.String() != e.uo.Ref.String() {
 		log.Info().Str("new", current.Ref.String()).Msg("newer update operation is present, will not process notifications")
 		return false, uuid.Nil

notifier/processor_safe_test.go

@@ -39,7 +39,6 @@ var (
 func TestProcessorSafe(t *testing.T) {
 	t.Run("UnsafeDuplications", testUnsafeDuplications)
 	t.Run("UnsafeStaleUOID", testUnsafeStaleUOID)
-	t.Run("UnSafeFirstUpdate", testUnsafeFirstUpdate)
 	t.Run("UnsafeMatcherErr", testUnsafeMatcherErr)
 	t.Run("UnsafeStoreErr", testUnsafeStoreErr)
 	t.Run("Safe", testSafe)
@@ -131,43 +130,6 @@ func testUnsafeMatcherErr(t *testing.T) {
 	}
 }
 
-// testSafeFirstUpdate confirms notifications will not be created if no previous
-// operation can be used as a base in the diff.
-func testUnsafeFirstUpdate(t *testing.T) {
-	ctx := context.TODO()
-	sm := &MockStore{
-		ReceiptByUOID_: func(ctx context.Context, id uuid.UUID) (Receipt, error) {
-			return Receipt{}, clairerror.ErrNoReceipt{}
-		},
-	}
-	mm := &matcher.Mock{
-		UpdateOperations_: func(context.Context, ...string) (map[string][]driver.UpdateOperation, error) {
-			// reslice to have only one UOID
-			latest := processorUpdateOps[testUpdater][:1]
-			uo := map[string][]driver.UpdateOperation{
-				testUpdater: latest,
-			}
-			return uo, nil
-		},
-	}
-
-	p := Processor{
-		store:   sm,
-		matcher: mm,
-	}
-
-	e := Event{
-		updater: testUpdater,
-		uo:      processorUpdateOps[testUpdater][1],
-	}
-
-	b, _ := p.safe(ctx, e)
-	if b {
-		t.Fatalf("got: %v, want: %v", b, false)
-	}
-
-}
-
 // testSafeStaleUOID confirms the guard against creating stale notifications
 // works correctly.
 func testUnsafeStaleUOID(t *testing.T) {