ViewFilter.php

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<?php
namespace Elgg\Amd;

class ViewFilter {
    private function getAmdName($name) {
        if (preg_match('~^(js/)?(.+)\\.js\\z~', $name, $m)) {
            // "js/foo/bar.js" or "foo/bar.js"
            return $m[2];
        }

        // must be in "js/" dir
        if (0 !== strpos($name, 'js/')) {
            return '';
        }
        $name = substr($name, 3);

        // Don't allow extension. We matched ".js" above
        if (pathinfo($name, PATHINFO_EXTENSION) !== null) {
            return '';
        }

        // "foo/bar"
        return $name;
    }
    
    public function filter($viewName, $content) {
        $amdName = $this->getAmdName($viewName);
        
        if (!empty($amdName)) {
            $content = preg_replace('/^(\s*)define\(([^\'"])/m', "\${1}define(\"$amdName\", \$2", $content, 1);
        }
        
        return $content;
    }
}