* ``` * * @internal */ final class InstallationStateCssClassViewHelper extends AbstractViewHelper { public function initializeArguments(): void { $this->registerArgument('needle', 'string', '', true); $this->registerArgument('haystack', 'array', '', true); } /** * Returns string meant to be used as css class * 'installed' => if an extension is installed * 'available' => if an extension is available in the system * '' (empty string) => if neither installed nor available */ public function render(): string { $needle = $this->arguments['needle']; $haystack = $this->arguments['haystack']; if (array_key_exists($needle, $haystack)) { if (isset($haystack[$needle]['installed']) && $haystack[$needle]['installed'] === true) { return 'installed'; } return 'available'; } return ''; } }