Set default capability for old scanners (goharbor#20306)

Signed-off-by: stonezdj <stone.zhang@broadcom.com>
Co-authored-by: Wang Yan <wangyan@vmware.com>

Author: stonezdj

src/pkg/scan/rest/v1/models.go

@@ -161,14 +161,22 @@ func (md *ScannerAdapterMetadata) GetCapability(mimeType string) *ScannerCapabil
 // ConvertCapability converts the capability to map, used in get scanner API
 func (md *ScannerAdapterMetadata) ConvertCapability() map[string]interface{} {
 	capabilities := make(map[string]interface{})
+	oldScanner := true
 	for _, c := range md.Capabilities {
+		if len(c.Type) > 0 {
+			oldScanner = false
+		}
 		if c.Type == ScanTypeVulnerability {
 			capabilities[supportVulnerability] = true
-		}
-		if c.Type == ScanTypeSbom {
+		} else if c.Type == ScanTypeSbom {
 			capabilities[supportSBOM] = true
 		}
 	}
+	if oldScanner && len(capabilities) == 0 {
+		// to compatible with old version scanner, suppose they should always support scan vulnerability when capability is empty
+		capabilities[supportVulnerability] = true
+		capabilities[supportSBOM] = false
+	}
 	return capabilities
 }
 

src/pkg/scan/rest/v1/models_test.go

@@ -13,3 +13,29 @@ func TestIsSupportedMimeType(t *testing.T) {
 	// Test with an unsupported mime type
 	assert.False(t, isSupportedMimeType("unsupported/mime-type"), "isSupportedMimeType should return false for unsupported mime types")
 }
+
+func TestConvertCapability(t *testing.T) {
+	md := &ScannerAdapterMetadata{
+		Capabilities: []*ScannerCapability{
+			{Type: ScanTypeSbom},
+			{Type: ScanTypeVulnerability},
+		},
+	}
+	result := md.ConvertCapability()
+	assert.Equal(t, result[supportSBOM], true)
+	assert.Equal(t, result[supportVulnerability], true)
+}
+
+func TestConvertCapabilityOldScaner(t *testing.T) {
+	md := &ScannerAdapterMetadata{
+		Capabilities: []*ScannerCapability{
+			{
+				ConsumesMimeTypes: []string{"application/vnd.oci.image.manifest.v1+json", "application/vnd.docker.distribution.manifest.v2+json"},
+				ProducesMimeTypes: []string{MimeTypeNativeReport},
+			},
+		},
+	}
+	result := md.ConvertCapability()
+	assert.Equal(t, result[supportSBOM], false)
+	assert.Equal(t, result[supportVulnerability], true)
+}