feat: implement create command

cmd/utils/tools.go

@@ -1,17 +1,19 @@
 package utils
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"path"
+	"strings"
 
 	"github.com/charmbracelet/lipgloss"
 )
 
 var ErrStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#F00"))
 
-func ErrPrint(data string) {
-	fmt.Println(ErrStyle.Render(data))
+func ErrPrint(data ...string) {
+	fmt.Println(ErrStyle.Render(strings.Join(data, " ")))
 }
 
 var EnvyPath string
@@ -24,3 +26,19 @@ func Init() {
 
 	EnvyPath = path.Join(conf, "envy")
 }
+
+func NoSpace(input string) error {
+	for _, r := range input {
+		if !(isAlphaNum(r) || r == '-' || r == '_') {
+			return errors.New("input can only contain letters, numbers, '-' and '_'")
+		}
+	}
+	return nil
+}
+
+// helper function
+func isAlphaNum(r rune) bool {
+	return (r >= 'a' && r <= 'z') ||
+		(r >= 'A' && r <= 'Z') ||
+		(r >= '0' && r <= '9')
+}