Add instance type and replicas to MongoDB Flex instance describe pret… (#40)

* Add instance type and replicas to MongoDB Flex instance describe pretty output

* Do not show instance type when it is not known

Author: joaopalet

internal/cmd/mongodbflex/instance/create/create.go

@@ -238,15 +238,8 @@ func buildRequest(ctx context.Context, service string, model *inputModel, apiCli
 		return req, err
 	}
 
-	// The number of replicas is enforced by the API according to the instance type
-	var replicas int64
-	if *model.Type == "Single" {
-		replicas = 1
-	} else if *model.Type == "Replica" {
-		replicas = 3
-	} else if *model.Type == "Sharded" {
-		replicas = 9
-	} else {
+	replicas, err := mongodbflexUtils.GetInstanceReplicas(*model.Type)
+	if err != nil {
 		return req, fmt.Errorf("invalid MongoDB Flex intance type: %w", err)
 	}
 

internal/cmd/mongodbflex/instance/describe/describe.go

@@ -11,6 +11,7 @@ import (
 	"stackit/internal/pkg/examples"
 	"stackit/internal/pkg/globalflags"
 	"stackit/internal/pkg/services/mongodbflex/client"
+	mongodbflexUtils "stackit/internal/pkg/services/mongodbflex/utils"
 	"stackit/internal/pkg/tables"
 	"stackit/internal/pkg/utils"
 
@@ -91,6 +92,12 @@ func outputResult(cmd *cobra.Command, outputFormat string, instance *mongodbflex
 		acls := *instance.Acl.Items
 		strings.Join(acls, ",")
 
+		instanceType, err := mongodbflexUtils.GetInstanceType(*instance.Replicas)
+		if err != nil {
+			// Should never happen
+			instanceType = ""
+		}
+
 		table := tables.NewTable()
 		table.AddRow("ID", *instance.Id)
 		table.AddSeparator()
@@ -106,11 +113,15 @@ func outputResult(cmd *cobra.Command, outputFormat string, instance *mongodbflex
 		table.AddSeparator()
 		table.AddRow("FLAVOR DESCRIPTION", *instance.Flavor.Description)
 		table.AddSeparator()
+		table.AddRow("TYPE", instanceType)
+		table.AddSeparator()
+		table.AddRow("REPLICAS", *instance.Replicas)
+		table.AddSeparator()
 		table.AddRow("CPU", *instance.Flavor.Cpu)
 		table.AddSeparator()
 		table.AddRow("RAM", *instance.Flavor.Memory)
 		table.AddSeparator()
-		err := table.Display(cmd)
+		err = table.Display(cmd)
 		if err != nil {
 			return fmt.Errorf("render table: %w", err)
 		}

internal/pkg/services/mongodbflex/utils/utils.go

@@ -9,6 +9,13 @@ import (
 	"github.com/stackitcloud/stackit-sdk-go/services/mongodbflex"
 )
 
+// The number of replicas is enforced by the API according to the instance type
+var instanceTypeToReplicas = map[string]int64{
+	"Single":  1,
+	"Replica": 3,
+	"Sharded": 9,
+}
+
 func ValidateFlavorId(service, flavorId string, flavors *[]mongodbflex.HandlersInfraFlavor) error {
 	for _, f := range *flavors {
 		if f.Id != nil && strings.EqualFold(*f.Id, flavorId) {
@@ -82,3 +89,20 @@ func GetUserName(ctx context.Context, apiClient MongoDBFlexClient, projectId, in
 	}
 	return *resp.Item.Username, nil
 }
+
+func GetInstanceReplicas(instanceType string) (int64, error) {
+	numReplicas, ok := instanceTypeToReplicas[instanceType]
+	if !ok {
+		return 0, fmt.Errorf("invalid instance type: %v", instanceType)
+	}
+	return numReplicas, nil
+}
+
+func GetInstanceType(numReplicas int64) (string, error) {
+	for k, v := range instanceTypeToReplicas {
+		if v == numReplicas {
+			return k, nil
+		}
+	}
+	return "", fmt.Errorf("invalid number of replicas: %v", numReplicas)
+}