add golang backend for login an d webserver

backend/utils/utils.go

@@ -0,0 +1,46 @@
+package utils
+
+import (
+	"fmt"
+	"os/exec"
+	"runtime"
+
+	"github.com/tecamino/tecamino-logger/logging"
+)
+
+func OpenBrowser(url string, logger *logging.Logger) error {
+	var commands [][]string
+
+	switch runtime.GOOS {
+	case "windows":
+		// Try with Chrome in kiosk mode
+		commands = [][]string{
+			{`C:\Program Files\Google\Chrome\Application\chrome.exe`, "--kiosk", url},
+			{"rundll32", "url.dll,FileProtocolHandler", url}, // fallback
+		}
+	case "darwin":
+		// macOS: open with Chrome in kiosk
+		commands = [][]string{
+			{"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome", "--kiosk", url},
+			{"open", url}, // fallback
+		}
+	default: // Linux
+		commands = [][]string{
+			{"chromium-browser", "--kiosk", url},
+			{"google-chrome", "--kiosk", url},
+			{"firefox", "--kiosk", url},
+			{"xdg-open", url}, // fallback
+		}
+	}
+
+	for _, cmd := range commands {
+		execCmd := exec.Command(cmd[0], cmd[1:]...)
+		if err := execCmd.Start(); err == nil {
+			return nil
+		} else {
+			logger.Error("utils.OpenBrowser", err)
+		}
+	}
+
+	return fmt.Errorf("could not open browser")
+}