Add HasServiceTemplate & GetServiceTemplate helpers (#649)

Signed-off-by: Tamal Saha <[email protected]>

apis/kubedb/v1alpha2/helpers.go

@@ -22,6 +22,7 @@ import (
 	"k8s.io/apimachinery/pkg/labels"
 	appslister "k8s.io/client-go/listers/apps/v1"
 	apps_util "kmodules.xyz/client-go/apps/v1"
+	ofst "kmodules.xyz/offshoot-api/api/v1"
 )
 
 func checkReplicas(lister appslister.StatefulSetNamespaceLister, selector labels.Selector, expectedItems int) (bool, string, error) {
@@ -37,3 +38,25 @@ func checkReplicas(lister appslister.StatefulSetNamespaceLister, selector labels
 	ready, msg := apps_util.StatefulSetsAreReady(items)
 	return ready, msg, nil
 }
+
+// HasServiceTemplate returns "true" if the desired serviceTemplate provided in "aliaS" is present in the serviceTemplate list.
+// Otherwise, it returns "false".
+func HasServiceTemplate(templates []NamedServiceTemplateSpec, alias ServiceAlias) bool {
+	for i := range templates {
+		if templates[i].Alias == alias {
+			return true
+		}
+	}
+	return false
+}
+
+// GetServiceTemplate returns a pointer to the desired serviceTemplate referred by "aliaS". Otherwise, it returns nil.
+func GetServiceTemplate(templates []NamedServiceTemplateSpec, alias ServiceAlias) ofst.ServiceTemplateSpec {
+	for i := range templates {
+		c := templates[i]
+		if c.Alias == alias {
+			return c.ServiceTemplate
+		}
+	}
+	return ofst.ServiceTemplateSpec{}
+}