refactor: remove pkg/extensions/search/common and move the code to the appropriate packages (#1358)

Signed-off-by: Nicol Draghici <idraghic@cisco.com>

pkg/common/utils.go

@@ -0,0 +1,70 @@
+package common
+
+import (
+	"strings"
+	"time"
+
+	ispec "github.com/opencontainers/image-spec/specs-go/v1"
+)
+
+func GetImageDirAndTag(imageName string) (string, string) {
+	var imageDir string
+
+	var imageTag string
+
+	if strings.Contains(imageName, ":") {
+		imageDir, imageTag, _ = strings.Cut(imageName, ":")
+	} else {
+		imageDir = imageName
+	}
+
+	return imageDir, imageTag
+}
+
+func GetImageDirAndDigest(imageName string) (string, string) {
+	var imageDir string
+
+	var imageDigest string
+
+	if strings.Contains(imageName, "@") {
+		imageDir, imageDigest, _ = strings.Cut(imageName, "@")
+	} else {
+		imageDir = imageName
+	}
+
+	return imageDir, imageDigest
+}
+
+// GetImageDirAndReference returns the repo, digest and isTag.
+func GetImageDirAndReference(imageName string) (string, string, bool) {
+	if strings.Contains(imageName, "@") {
+		repo, digest := GetImageDirAndDigest(imageName)
+
+		return repo, digest, false
+	}
+
+	repo, tag := GetImageDirAndTag(imageName)
+
+	return repo, tag, true
+}
+
+// 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
+}