/**
*creates the shortcode pattern that only matches Avia Builder Shortcodes
**/
static function build_pattern($predefined_tags = false)
{
global $shortcode_tags;
//save the "real" shortcode array
$old_sc = $shortcode_tags;
//if we got allowed shortcodes build the pattern. nested shortcodes are also considered but within a separate array
if (!empty(ShortcodeHelper::$allowed_shortcodes)) {
$shortcode_tags = array_flip(array_merge(ShortcodeHelper::$allowed_shortcodes, ShortcodeHelper::$nested_shortcodes));
}
//filter out all elements that are not in the predefined tags array. this is necessary for nested shortcode modal to work properly
if (is_array($predefined_tags)) {
$predefined_tags = array_flip($predefined_tags);
$shortcode_tags = shortcode_atts($predefined_tags, $shortcode_tags);
}
//create the pattern and store it
ShortcodeHelper::$pattern = get_shortcode_regex();
//restore original shortcode tags
$shortcode_tags = $old_sc;
return ShortcodeHelper::$pattern;
}
