/**
* Collect URLs from the current page and stores it into the database for a later upload
* This function does not upload anything because it speeds up the loadtime of the current page
* It also does not check if the file is locally stored or not
*
* @param array $matches
* @param bool $is_css_file this will be converted to true if $is_css_import is true
* @param bool $is_css_import
*
* @return bool|null|string
*
* @since 1.0
*/
public function collect_urls($matches, $is_css_file = false, $is_css_import = false)
{
if ($is_css_import) {
$is_css_file = true;
}
$architecture = '[url]';
if ($is_css_file) {
$architecture = 'url("[url]") ';
}
if ($is_css_import) {
$architecture = '@import url("[url]") ' . $matches[1] . ';';
}
$url = $matches[0];
$url = trim($url);
if ('' == $url) {
return $url;
}
// leaves data: fields in URLs (used in some custom fonts)
if (false !== stripos($url, 'data:')) {
return $url;
}
// removes versioning from urls (ex. my-file.css?v=3.3.2)
$versioning = stripos($url, '?');
if (false !== $versioning) {
$url = substr($url, 0, stripos($url, '?'));
}
// removes versioning with #
$versioning = stripos($url, '#');
if (false !== $versioning) {
$url = substr($url, 0, stripos($url, '#'));
}
// checks if the ORIGINAL file URL is in the list of excluded files
if ($this->is_file_excluded($url)) {
return $url;
}
/**
* CSS files are tricky
* we first have to replace all relative paths with their absolute paths
* then we can decide if it should be uploaded
*/
if ($is_css_file) {
$url = $this->real_css_image_url($url);
}
// check if the file is in the caching database table
$drive_url = WPB_Google_Drive_Cdn_Service_Helper::get_cached_url($url);
if (empty($drive_url)) {
// if the file has not yet been uploaded to Google Drive, mark it (for doing this later)
WPB_Google_Drive_Cdn_Service_Helper::record_url($url);
return $is_css_file ? str_replace('[url]', $url, $architecture) : $url;
}
// yes, it's in the db table. Go for it!
// checks if the DRIVE file URL is in the list of excluded files
if ($this->is_file_excluded($url)) {
return $url;
}
// now check whether this url should be replaced
$every_x = (int) WPB_Google_Drive_Cdn_Settings::get_setting('every_x');
if ($every_x) {
if (!isset($this->_replacement_counter)) {
$this->_replacement_counter = 0;
}
$this->_replacement_counter = $this->_replacement_counter + 1;
// replace every single link when $every_x is 1
if (1 == $every_x) {
return $is_css_file ? str_replace('[url]', $drive_url, $architecture) : $drive_url;
}
// replace nothing
if ($every_x <= 0) {
return $is_css_file ? str_replace('[url]', $url, $architecture) : $url;
}
// replace each x
if (0 == $this->_replacement_counter % $every_x) {
return $is_css_file ? str_replace('[url]', $drive_url, $architecture) : $drive_url;
}
}
// return the normal URL, because we cannot do anything here
return $is_css_file ? str_replace('[url]', $url, $architecture) : $url;
}
