Stepnav.php

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<?php

 
namespace Depage\HtmlForm\Elements;

class Stepnav
{
    private $htmlString;

    protected $form;

    public function __construct(array $parameters, object $form)
    {
        $this->form = $form;
    }

    public function __toString(): string
    {
        $currentStepId = $this->form->getCurrentStepId();
        $firstInvalidStep = $this->form->getFirstInvalidStep();
 
        $htmlString = "<ol class=\"stepnav\">";
        foreach ($this->form->getSteps() as $stepNum => $step) {
            $link = "";
            $class = "step-$stepNum";
            $label = $step->htmlLabel();
 
            // add link to previously unsaved steps
            if ($stepNum <= $firstInvalidStep && $stepNum != $currentStepId) {
                $link = "href=\"" . htmlspecialchars($this->form->buildUrl(['step' => $stepNum])) . "\"";
            }
 
            // add valid-class to previous steps
            if ($stepNum < $currentStepId) {
                $class .= $step->validate() ? " valid" : " invalid";
            }
 
            if ($stepNum == $currentStepId) {
                $htmlString .= "<li class=\"current-step $class\"><a $link><strong>$label</strong></a></li>";
            } else {
                $htmlString .= "<li class=\"$class\"><a $link>$label</a></li>";
            }
        }
        $htmlString .= "</ol>";
 
        return $htmlString;
    }
}
 
/* vim:set ft=php sw=4 sts=4 fdm=marker et : */