fix(lastUpdated): fix image lastUpdated timestamp logic (#863)

The lastUpdated field was picked from the first entry in image history
Now it is the created time of the image, or the last entry in
image history, if created time is unavailable

Signed-off-by: Andrei Aaron <andaaron@cisco.com>

pkg/extensions/search/common/common.go

@@ -75,6 +75,27 @@ func GetImageDirAndTag(imageName string) (string, string) {
 	return imageDir, imageTag
 }
 
+// GetImageLastUpdated This method will return last updated timestamp.
+// The Created timestamp is used, but if it is missing, look at the
+// history field and, if provided, return the timestamp of last entry in history.
+func GetImageLastUpdated(imageInfo ispec.Image) time.Time {
+	timeStamp := imageInfo.Created
+
+	if timeStamp != nil && !timeStamp.IsZero() {
+		return *timeStamp
+	}
+
+	if len(imageInfo.History) > 0 {
+		timeStamp = imageInfo.History[len(imageInfo.History)-1].Created
+	}
+
+	if timeStamp == nil {
+		timeStamp = &time.Time{}
+	}
+
+	return *timeStamp
+}
+
 func GetFixedTags(allTags, vulnerableTags []TagInfo) []TagInfo {
 	sort.Slice(allTags, func(i, j int) bool {
 		return allTags[i].Timestamp.Before(allTags[j].Timestamp)

pkg/extensions/search/common/oci_layout.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"path"
 	"strconv"
-	"time"
 
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	notreg "github.com/notaryproject/notation-go/registry"
@@ -24,7 +23,6 @@ type OciLayoutUtils interface { //nolint: interfacebloat
 	GetImageBlobManifest(imageDir string, digest godigest.Digest) (v1.Manifest, error)
 	GetImageInfo(imageDir string, hash v1.Hash) (ispec.Image, error)
 	GetImageTagsWithTimestamp(repo string) ([]TagInfo, error)
-	GetImageLastUpdated(imageInfo ispec.Image) time.Time
 	GetImagePlatform(imageInfo ispec.Image) (string, string)
 	GetImageManifestSize(repo string, manifestDigest godigest.Digest) int64
 	GetRepoLastUpdated(repo string) (TagInfo, error)
@@ -189,13 +187,7 @@ func (olu BaseOciLayoutUtils) GetImageTagsWithTimestamp(repo string) ([]TagInfo,
 				return tagsInfo, err
 			}
 
-			var timeStamp time.Time
-
-			if len(imageInfo.History) != 0 {
-				timeStamp = *imageInfo.History[0].Created
-			} else {
-				timeStamp = time.Time{}
-			}
+			timeStamp := GetImageLastUpdated(imageInfo)
 
 			tagsInfo = append(tagsInfo, TagInfo{Name: val, Timestamp: timeStamp, Digest: digest.String()})
 		}
@@ -250,18 +242,6 @@ func (olu BaseOciLayoutUtils) CheckManifestSignature(name string, digest godiges
 	return true
 }
 
-func (olu BaseOciLayoutUtils) GetImageLastUpdated(imageInfo ispec.Image) time.Time {
-	var timeStamp time.Time
-
-	if len(imageInfo.History) != 0 {
-		timeStamp = *imageInfo.History[0].Created
-	} else {
-		timeStamp = time.Time{}
-	}
-
-	return timeStamp
-}
-
 func (olu BaseOciLayoutUtils) GetImagePlatform(imageConfig ispec.Image) (
 	string, string,
 ) {
@@ -413,7 +393,7 @@ func (olu BaseOciLayoutUtils) GetExpandedRepoInfo(name string) (RepoInfo, error)
 		size := strconv.Itoa(int(imageSize))
 		manifestDigest := man.Digest.Hex()
 		configDigest := manifest.Config.Digest.Hex
-		lastUpdated := olu.GetImageLastUpdated(imageConfigInfo)
+		lastUpdated := GetImageLastUpdated(imageConfigInfo)
 		score := 0
 
 		imageSummary := ImageSummary{

pkg/extensions/search/resolver.go

@@ -10,7 +10,6 @@ import (
 	"sort"
 	"strconv"
 	"strings"
-	"time"
 
 	"github.com/99designs/gqlgen/graphql"
 	glob "github.com/bmatcuk/doublestar/v4"            //nolint:gci
@@ -211,7 +210,7 @@ func repoListWithNewestImage(
 			manifestDigest := manifest.Digest.Hex()
 			configDigest := imageBlobManifest.Config.Digest.Hex
 			isSigned := olu.CheckManifestSignature(repo, manifest.Digest)
-			lastUpdated := olu.GetImageLastUpdated(imageConfigInfo)
+			lastUpdated := common.GetImageLastUpdated(imageConfigInfo)
 			score := 0
 
 			imageSummary := gql_generated.ImageSummary{
@@ -371,7 +370,7 @@ func globalSearch(repoList []string, name, tag string, olu common.OciLayoutUtils
 				// update matching score
 				score := calculateImageMatchingScore(repo, index, matchesTag)
 
-				lastUpdated := olu.GetImageLastUpdated(imageConfigInfo)
+				lastUpdated := common.GetImageLastUpdated(imageConfigInfo)
 				os, arch := olu.GetImagePlatform(imageConfigInfo)
 				osArch := &gql_generated.OsArch{
 					Os:   &os,
@@ -569,13 +568,7 @@ func BuildImageInfo(repo string, tag string, manifestDigest godigest.Digest,
 	allHistory := []*gql_generated.LayerHistory{}
 	formattedManifestDigest := manifestDigest.Hex()
 	annotations := common.GetAnnotations(manifest.Annotations, imageConfig.Config.Labels)
-
-	lastUpdated := imageConfig.Created
-
-	if (lastUpdated == nil || *lastUpdated == (time.Time{})) &&
-		len(imageConfig.History) > 0 {
-		lastUpdated = imageConfig.History[len(imageConfig.History)-1].Created
-	}
+	lastUpdated := common.GetImageLastUpdated(imageConfig)
 
 	history := imageConfig.History
 	if len(history) == 0 {
@@ -617,7 +610,7 @@ func BuildImageInfo(repo string, tag string, manifestDigest godigest.Digest,
 			Licenses:      &annotations.Licenses,
 			Labels:        &annotations.Labels,
 			Source:        &annotations.Source,
-			LastUpdated:   lastUpdated,
+			LastUpdated:   &lastUpdated,
 			IsSigned:      &isSigned,
 			Platform: &gql_generated.OsArch{
 				Os:   &imageConfig.OS,
@@ -666,7 +659,7 @@ func BuildImageInfo(repo string, tag string, manifestDigest godigest.Digest,
 				Licenses:      &annotations.Licenses,
 				Labels:        &annotations.Labels,
 				Source:        &annotations.Source,
-				LastUpdated:   lastUpdated,
+				LastUpdated:   &lastUpdated,
 				IsSigned:      &isSigned,
 				Platform: &gql_generated.OsArch{
 					Os:   &imageConfig.OS,
@@ -711,7 +704,7 @@ func BuildImageInfo(repo string, tag string, manifestDigest godigest.Digest,
 		Licenses:      &annotations.Licenses,
 		Labels:        &annotations.Labels,
 		Source:        &annotations.Source,
-		LastUpdated:   lastUpdated,
+		LastUpdated:   &lastUpdated,
 		IsSigned:      &isSigned,
 		Platform: &gql_generated.OsArch{
 			Os:   &imageConfig.OS,