/**
* Extracts existing links from provided HTML fragment to be wrapped in a
* new link prior to appending extracted links.
*
* @param callable|null $processor callback invoked per found link to
* generate related link to be appended later, omit to keep extracted
* link as-is
* @param string|null $link URL of link to be wrapping provided HTML
* fragment, null to extract contained links, but skip eventual
* generation of link
* @param string $label HTML fragment to extract additional links from and
* wrap in link afterwards
* @param string|null $class classes to apply on link generated eventually
* @param string|null $title title of link generated eventually
* @param bool $external true if eventually generated link is linking sth.
* external
* @return string resulting HTML fragment
*/
public static function extendLink($processor, $link, $label, $class = null, $title = null, $external = false)
{
if (!is_callable($processor)) {
$processor = function ($options) {
return markup::link($options['href'], $options['label'], $options['class'], $options['title'], !array_key_exists('onclick', $options));
};
}
if (preg_match_all('#<a\\s([^>]+)>#i', $label, $links, PREG_SET_ORDER)) {
$tail = implode(' ', array_map(function ($link) use($processor) {
$opts = array();
$index = 0;
while (preg_match('/\\s*([^=]+)=("[^"]*"|\'[^\']*\')/', $link[1], $next, PREG_OFFSET_CAPTURE, $index)) {
$index = $next[0][1] + strlen($next[0][0]);
$name = trim($next[1][0]);
$value = substr($next[2][0], 1, -1);
$opts[$name] = $value;
}
return call_user_func($processor, $opts);
}, $links));
} else {
$tail = '';
}
$label = strip_tags($label);
return trim(($link ? markup::link($link, $label, $class, $title, $external) : $label) . ' ' . $tail);
}
/**
* Links all parts of provided code that are not linking already.
*
* @param string $in HTML code to be linked
* @param string $link URL of link target
* @param string $classes classes to use on linking
* @param string $title title to use on linking
* @param boolean $external true if link is considered external (to be opened in new window)
* @return string revised HTML code
*/
public static function linkStatic($link, $in, $classes = null, $title = null, $external = false)
{
$chunks = preg_split('#(<a\\s|</a>)#', $in, null, PREG_SPLIT_DELIM_CAPTURE);
$out = '';
for ($i = 0; $i < count($chunks); $i++) {
if (strtolower(trim($chunks[$i])) === '<a') {
$out .= $chunks[$i] . $chunks[$i + 1] . $chunks[$i + 2];
$i += 2;
} else {
$out .= preg_replace_callback('#(^\\]?\\s*[;,.:]?\\s*)(.*?)(\\s*[;,.:]?\\s*\\[?$)#', function ($matches) use($link, $classes, $title, $external) {
if ($matches[2]) {
return $matches[1] . markup::link($link, $matches[2], $classes, $title, $external) . $matches[3];
}
return $matches[1] . $matches[3];
}, $chunks[$i]);
}
}
return $out;
}
