public static function validate_regex($regex, $element)
{
if (is_string($regex) && @get_class($element) == CRAYON_ELEMENT_CLASS) {
// If the (?alt) tag has been used, insert the file into the regex
$file = self::regex_match('#\\(\\?alt:(.+?)\\)#', $regex);
if (count($file) == 2) {
// Element 0 has full match, 1 has captured groups
for ($i = 0; $i < count($file[1]); $i++) {
$file_lines = CrayonUtil::lines(dirname($element->path()) . crayon_s() . $file[1][$i], 'rcwh');
if ($file_lines !== FALSE) {
$file_lines = implode('|', $file_lines);
// If any spaces exist, treat them as whitespace
$file_lines = preg_replace('#[ \\t]+#msi', '\\s+', $file_lines);
$regex = str_replace($file[0][$i], "(?:{$file_lines})", $regex);
} else {
CrayonLog::syslog("Parsing of '{$element->path()}' failed, an (?alt) tag failed for the element '{$element->name()}'");
return FALSE;
}
}
}
// If the (?default:element) function is used, replace the regex with the default, if exists
$def = self::regex_match('#\\(\\?default(?:\\:(\\w+))?\\)#', $regex);
if (count($def) == 2) {
// Load default language
$default = CrayonResources::langs()->get(CrayonLangs::DEFAULT_LANG);
// If default has not been loaded, we can't use it, skip the element
if (!$default) {
CrayonLog::syslog("Could not use default regex in the element '{$element->name()}' in '{$element->path()}'");
return FALSE;
}
for ($i = 0; $i < count($def[1]); $i++) {
// If an element has been provided
$element_name = !empty($def[1][$i]) ? $def[1][$i] : $element->name();
if (($default_element = $default->element($element_name)) != FALSE) {
$regex = str_replace($def[0][$i], '(?:' . $default_element->regex() . ')', $regex);
} else {
CrayonLog::syslog("The language at '{$element->path()}' referred to the Default Language regex for element '{$element->name()}', which did not exist.");
return FALSE;
}
}
}
// If the (?html) tag is used, escape characters in html (<, > and &)
$html = self::regex_match('#\\(\\?html:(.+?)\\)#', $regex);
if (count($html) == 2) {
for ($i = 0; $i < count($html[1]); $i++) {
$regex = str_replace($html[0][$i], htmlentities($html[1][$i]), $regex);
}
}
// Ensure all parenthesis are atomic to avoid conflicting with element matches
$regex = CrayonUtil::esc_atomic($regex);
// Escape #, this is our delimiter
$regex = CrayonUtil::esc_hash($regex);
// Test if regex is valid
if (@preg_match("#{$regex}#", '') === FALSE) {
CrayonLog::syslog("The regex for the element '{$element->name()}' in '{$element->path()}' is not valid.");
return FALSE;
}
return $regex;
} else {
return '';
}
}
private function load_attr_file($path)
{
if (($lines = CrayonUtil::lines($path, 'lwc')) !== FALSE) {
$attributes = array();
// key = language id, value = array of attr
foreach ($lines as $line) {
preg_match('#^[\\t ]*([^\\r\\n\\t ]+)[\\t ]+([^\\r\\n]+)#', $line, $matches);
if (count($matches) == 3 && ($lang = $this->get($matches[1]))) {
// If the langauges of the attribute exists, return it in an array
// TODO merge instead of replace key?
$attributes[$matches[1]] = explode(' ', $matches[2]);
}
}
return $attributes;
} else {
CrayonLog::syslog('Could not load attr file: ' . $path);
return FALSE;
}
}