feat: add cli prompts

Author: archandatta

cmd/create.go

@@ -2,9 +2,8 @@ package cmd
 
 import (
 	"fmt"
-	"regexp"
 
-	"github.com/AlecAivazis/survey/v2"
+	"github.com/onkernel/cli/pkg/create"
 	"github.com/spf13/cobra"
 )
 
@@ -21,68 +20,28 @@ func init() {
 	createCmd.Flags().String("template", "", "Template to use for the application")
 }
 
-const defaultAppName = "my-kernel-app"
-
-// projectNameValidator ensures the project name is safe for file systems and package managers.
-func projectNameValidator(val any) error {
-	str, ok := val.(string)
-	if !ok {
-		return fmt.Errorf("invalid input type")
-	}
-
-	// Project name must be non-empty
-	if len(str) == 0 {
-		return fmt.Errorf("project name cannot be empty")
-	}
+func runCreateApp(cmd *cobra.Command, args []string) error {
+	appName, _ := cmd.Flags().GetString("name")
+	language, _ := cmd.Flags().GetString("language")
+	template, _ := cmd.Flags().GetString("template")
 
-	// Validate project name: only letters, numbers, underscores, and hyphens
-	// This regex prevents special characters that might break shell commands or filesystem paths.
-	matched, err := regexp.MatchString(`^[A-Za-z\-_\d]+$`, str)
+	appName, err := create.PromptForAppName(appName)
 	if err != nil {
-		return err
-	}
-	if !matched {
-		return fmt.Errorf("project name may only include letters, numbers, underscores, and hyphens")
-	}
-	return nil
-}
-
-// promptForAppName prompts the user for the application name if not provided
-func promptForAppName(providedAppName string) (string, error) {
-	if providedAppName != "" {
-		return providedAppName, nil
-	}
-
-	var appName string
-	prompt := &survey.Input{
-		Message: "What is the name of your project?",
-		Default: defaultAppName,
+		return fmt.Errorf("failed to get app name: %w", err)
 	}
 
-	err := survey.AskOne(prompt, &appName, survey.WithValidator(projectNameValidator))
+	language, err = create.PromptForLanguage(language)
 	if err != nil {
-		return "", err
+		return fmt.Errorf("failed to get language: %w", err)
 	}
 
-	return appName, nil
-}
-
-func runCreateApp(cmd *cobra.Command, args []string) error {
-	providedAppName, _ := cmd.Flags().GetString("name")
-	language, _ := cmd.Flags().GetString("language")
-	template, _ := cmd.Flags().GetString("template")
-
-	// Prompt for app name if not provided
-	appName, err := promptForAppName(providedAppName)
+	template, err = create.PromptForTemplate(template)
 	if err != nil {
-		return fmt.Errorf("failed to get app name: %w", err)
+		return fmt.Errorf("failed to get template: %w", err)
 	}
 
 	fmt.Printf("Creating application '%s' with language '%s' and template '%s'...\n", appName, language, template)
 
-	// TODO: prompt the user for the language of the app, suggest a default language (typescript)
-	// TODO: prompt the user for the template of the app, suggest a default template (sample-app)
-
 	// TODO: create the project structure
 
 	// print "Creating a new TypeScript Sample App" or similar. Essentially the language and template name combined.

pkg/create/prompts.go

@@ -0,0 +1,87 @@
+package create
+
+import (
+	"fmt"
+	"regexp"
+
+	"github.com/AlecAivazis/survey/v2"
+)
+
+const defaultAppName = "my-kernel-app"
+
+// projectNameValidator ensures the project name is safe for file systems and package managers.
+func projectNameValidator(val any) error {
+	str, ok := val.(string)
+	if !ok {
+		return fmt.Errorf("invalid input type")
+	}
+
+	// Project name must be non-empty
+	if len(str) == 0 {
+		return fmt.Errorf("project name cannot be empty")
+	}
+
+	// Validate project name: only letters, numbers, underscores, and hyphens
+	// This regex prevents special characters that might break shell commands or filesystem paths.
+	matched, err := regexp.MatchString(`^[A-Za-z\-_\d]+$`, str)
+	if err != nil {
+		return err
+	}
+	if !matched {
+		return fmt.Errorf("project name may only include letters, numbers, underscores, and hyphens")
+	}
+	return nil
+}
+
+// PromptForAppName prompts the user for the application name if not provided
+func PromptForAppName(providedAppName string) (string, error) {
+	if providedAppName != "" {
+		return providedAppName, nil
+	}
+
+	var appName string
+	prompt := &survey.Input{
+		Message: "What is the name of your project?",
+		Default: defaultAppName,
+	}
+
+	if err := survey.AskOne(prompt, &appName, survey.WithValidator(projectNameValidator)); err != nil {
+		return "", err
+	}
+
+	return appName, nil
+}
+
+func PromptForLanguage(providedLanguage string) (string, error) {
+	if providedLanguage != "" {
+		return providedLanguage, nil
+	}
+	var language string
+	languagePrompt := &survey.Select{
+		Message: "Choose a programming language:",
+		// TODO: create constants so that more languages can be added later
+		Options: []string{"typescript", "python"},
+		Default: "typescript",
+	}
+	if err := survey.AskOne(languagePrompt, &language); err != nil {
+		return "", err
+	}
+	return language, nil
+}
+
+func PromptForTemplate(providedTemplate string) (string, error) {
+	if providedTemplate != "" {
+		return providedTemplate, nil
+	}
+
+	var template string
+	templatePrompt := &survey.Select{
+		Message: "Choose a template:",
+		Options: []string{"sample-app"},
+		Default: "sample-app",
+	}
+	if err := survey.AskOne(templatePrompt, &template); err != nil {
+		return "", err
+	}
+	return template, nil
+}