secra\CachingProxy\CssCachingProxy::modifyFilecontent()

Complexity

Conditions	2
Paths	1

Size

Total Lines	60
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Importance

Changes	2
Bugs	0	Features	0

<?php
    protected function modifyFilecontent($csscontent, $cssfilepath)
    {
        // Remove the path to docroot from full filepath and remove filename from cssfilepath
        $relativeCssPath = dirname(preg_replace("#^".$this->docrootpath."#", "", $cssfilepath));

        // Use # insted of / in regexpress!
        // Search for every url() expr in css files only if the start with ./
        // Don't matter if url in " or not
        $csscontent = preg_replace_callback(
            '#url\("?\./([^"]+)"?\)#i',
            function ($matches) use ($relativeCssPath)
            {
                // $matches[1] contain first subpattern
                return 'url("/'.$relativeCssPath.'/'.$matches[1].'")';
            },
            $csscontent
        );

        // Now search for path with ../ sequences
        $csscontent = preg_replace_callback(
            '#url\(("|\')?(../){1,20}([^"\']+)("|\')?\)#i',
            function ($matches) use ($relativeCssPath)
            {
                // $matches[0] contains whole matching pattern
                // $matches[2] contains ../ subpattern !! but only one time !!
                // $matches[3] contain path subpattern

                // Now count only how much ../ in the begining of the string to avoid counting of ../ in the middle

                // Where is the first .
                $posFirstDot = strpos($matches[0], ".");

                // Number of char that countain only ./ from the beginning of the string
                $charCount = strspn($matches[0], "./", $posFirstDot);

                // Cut the first part of the string
                $pathstring = substr($matches[0], $posFirstDot, $charCount);

                // Count the ../
                $pathdepth = substr_count($pathstring, '../');

                // Add starting slash, in case all folders has to be replaced, so the last can match in for loop
                // later the / is need because we transform the relativ to absolut path, so we need a starting slash
                $relativeCssPath = "/".$relativeCssPath;

                // Remove all folder that dots stand for
                for ($i=0; $i<$pathdepth; $i++) {
                    // find last occurrence of / in csspath, remove folder depth from last to first
                    $lastSlashPos = strrpos($relativeCssPath, "/");
                    // remove the last folder now, substr replace everything to the end of the string as default
                    $relativeCssPath = substr_replace($relativeCssPath, "", $lastSlashPos);
                }

                return 'url("'.$relativeCssPath.'/'.$matches[3].'")';
            },
            $csscontent
        );

        // return css content
        return $csscontent;
    }
}