add the validation question and function

Author: walonCode

internals/extras/list.go

@@ -35,3 +35,38 @@ var DatabaseListInfo = map[string]map[string][]string{
 		"fastapi": {"pip", "install", "aiosqlite"},
 	},
 }
+
+
+var ValidationList = map[string][]string{
+	"node":    {"zod", "yup", "joi", "class-validator", "none"},
+	"fastapi": {"pydantic", "none"},
+	"go":      {"go-playground/validator", "none"},
+}
+
+
+var ValidationListInfo = map[string]map[string][]string{
+	"zod": {
+		"js": {"npm", "install", "zod"},
+		"ts": {"npm", "install", "zod"}, 
+	},
+	"yup": {
+		"js": {"npm", "install", "yup"},
+		"ts": {"npm", "install", "yup", "@types/yup"},
+	},
+	"joi": {
+		"js": {"npm", "install", "joi"},
+		"ts": {"npm", "install", "joi", "@types/joi"},
+	},
+	"class-validator": {
+		"js": {"npm", "install", "class-validator", "class-transformer"}, // works but not common in JS-only
+		"ts": {"npm", "install", "class-validator", "class-transformer"},
+	},
+	"pydantic": {
+		"fastapi": {"pip", "install", "pydantic"},
+	},
+	"go-playground/validator": {
+		"go": {"go", "get", "github.com/go-playground/validator/v10"},
+	},
+}
+
+

internals/prompt/prompt.go

@@ -9,7 +9,7 @@ import (
 )
 
 func SelectBackend(options []string)(string, error){
-	fmt.Println("Choose a backend starter")
+	fmt.Println("-----Choose a backend starter------")
 
 	for i, opt := range options {
 		fmt.Printf("%d), %s\n",i+1, opt)
@@ -47,7 +47,7 @@ func AskProjectName()(string, error){
 
 //ask for database
 func AskDatabase( option []string)(string, error){
-	fmt.Println("Choice a database")
+	fmt.Println("-----Choice a database------")
 	for i, opt := range option {
 		fmt.Printf(" %d). %s\n",i+1, opt)
 	}
@@ -71,6 +71,27 @@ func AskDatabase( option []string)(string, error){
 //ask for auth
 //ask for linting
 //ask for validation
+func AskForValidator(options []string)(string,error){
+	fmt.Println("-----Choose a Validator libray-----")
+	for i ,opt := range options{
+		fmt.Printf(" %d). %v\n",i+1, opt)
+	}
+
+	reader := bufio.NewReader(os.Stdin)
+	fmt.Printf("Enter your choice: ")
+	input,err := reader.ReadString('\n')
+	if err != nil {
+		return "",err
+	}
+	input = strings.TrimSpace(input)
+
+	choice,err := strconv.Atoi(input)
+	if err != nil && choice > len(options) && choice < 1 {
+		return "", nil
+	}
+
+	return options[choice - 1], nil
+}
 
 
 func ConfirmGit()(bool, error){

internals/runner/runValidator.go

@@ -0,0 +1,45 @@
+package runner
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+
+	"github.com/walonCode/backend-starter-cli/internals/extras"
+)
+
+// RunDatabase installs DB dependencies based on stack + dbName
+func RunValidator(projectDir, stack, validatorName string) error {
+	if validatorName == "none" {
+		fmt.Println("No validator selected")
+		return nil
+	}
+
+	dbInfo, ok := extras.ValidationListInfo[validatorName]
+	if !ok {
+		return fmt.Errorf("unknown validator: %s", validatorName)
+	}
+
+	cmdArgs, ok := dbInfo[stack]
+	if !ok {
+		return fmt.Errorf("no install instructions for %s in %s", validatorName, stack)
+	}
+
+	if len(cmdArgs) == 0 {
+		return fmt.Errorf("empty install command for %s in %s", validatorName, stack)
+	}
+
+	// First item is the command, rest are args
+	cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Dir = projectDir
+
+	fmt.Printf("📦 Installing %s for %s...\n", validatorName, stack)
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("failed to install %s: %w", validatorName, err)
+	}
+
+	fmt.Printf("✅ %s setup complete!\n", validatorName)
+	return nil
+}