myaac/system/twig.php

<?php

use Twig\Environment as Twig_Environment;
use Twig\Extension\DebugExtension as Twig_DebugExtension;
use Twig\Loader\FilesystemLoader as Twig_FilesystemLoader;
use Twig\TwigFilter;
use Twig\TwigFunction;

$dev_mode = (config('env') === 'dev');
$twig_loader = new Twig_FilesystemLoader(SYSTEM . 'templates');
$twig = new Twig_Environment($twig_loader, array(
	'cache' => CACHE . 'twig/',
	'auto_reload' => $dev_mode,
	'debug' => $dev_mode
));

$twig_loader->addPath(PLUGINS);

$twig->addGlobal('logged', false);
$twig->addGlobal('account_logged', new OTS_Account());

if($dev_mode) {
	$twig->addExtension(new Twig_DebugExtension());
}
unset($dev_mode);

require LIBS . 'TwigTypeCastingExtension.php';
$twig->addExtension(new MyAAC\Twig\Extension\TwigTypeCastingExtension());

$function = new TwigFunction('getStyle', function ($i) {
	return getStyle($i);
});
$twig->addFunction($function);

$function = new TwigFunction('getLink', function ($s) {
	return getLink($s);
});
$twig->addFunction($function);

$function = new TwigFunction('getPlayerLink', function ($s, $p) {
	return getPlayerLink($s, $p);
});
$twig->addFunction($function);

$function = new TwigFunction('getGuildLink', function ($s, $p) {
    return getGuildLink($s, $p);
});
$twig->addFunction($function);

$function = new TwigFunction('hook', function ($context, $hook, array $params = []) {
	global $hooks;

	if(is_string($hook)) {
		if (defined($hook)) {
			$hook = constant($hook);
		}
		else {
			// plugin/template has a hook that this version of myaac does not support
			// just silently return
			return;
		}
	}

	$params['context'] = $context;
	$hooks->trigger($hook, $params);
}, ['needs_context' => true]);
$twig->addFunction($function);

$function = new TwigFunction('config', function ($key) {
	return config($key);
});
$twig->addFunction($function);

$function = new TwigFunction('getCustomPage', function ($name) {
	$success = false;
	return getCustomPage($name, $success);
});
$twig->addFunction($function);

$filter = new TwigFilter('urlencode', function ($s) {
	return urlencode($s);
});

$twig->addFilter($filter);
unset($function, $filter);