feat: validate backend name.

Signed-off-by: Aris Boutselis <aris.boutselis@senseon.io>

cmd/auth/auth.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/fatih/color"
 	"github.com/k8sgpt-ai/k8sgpt/pkg/ai"
+	"github.com/k8sgpt-ai/k8sgpt/pkg/util"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"golang.org/x/term"
@@ -58,9 +59,10 @@ var AuthCmd = &cobra.Command{
 			}
 		}
 
-		// check if backend is not empty
-		if backend == "" {
-			color.Red("Error: Backend AI cannot be empty.")
+		// check if backend is not empty and a valid value
+		backends := util.Backends()
+		if backend == "" || !util.ValidBackend(backends, backend) {
+			color.Red("Error: Backend AI cannot be empty and accepted values are '%v'", strings.Join(backends, ", "))
 			os.Exit(1)
 		}
 

pkg/util/util.go

@@ -185,3 +185,17 @@ func EnsureDirExists(dir string) error {
 
 	return err
 }
+
+func Backends() []string {
+	return []string{"openai", "localai", "azureopenai", "noopai"}
+}
+
+func ValidBackend(validBackends []string, backend string) bool {
+	for _, b := range validBackends {
+		if b == backend {
+			return true
+		}
+	}
+
+	return false
+}