Method createTagsFromField

/**
 * Create any new tags by looking for #new# in the strings
 *
 * @param   array  $tags  Tags text array from the field
 *
 * @return  mixed   If successful, metadata with new tag titles replaced by tag ids. Otherwise false.
 *
 * @since   3.1
 */
public function createTagsFromField($tags)
{
    if (empty($tags) || $tags[0] == '') {
        return;
    } else {
        // We will use the tags table to store them
        $tagTable = Factory::getApplication()->bootComponent('com_tags')->getMVCFactory()->createTable('Tag', 'Administrator');
        $newTags = array();
        $canCreate = Factory::getUser()->authorise('core.create', 'com_tags');
        foreach ($tags as $key => $tag) {
            // User is not allowed to create tags, so don't create.
            if (!$canCreate && strpos($tag, '#new#') !== false) {
                continue;
            }
            // Remove the #new# prefix that identifies new tags
            $tagText = str_replace('#new#', '', $tag);
            if ($tagText === $tag) {
                $newTags[] = (int) $tag;
            } else {
                // Clear old data if exist
                $tagTable->reset();
                // Try to load the selected tag
                if ($tagTable->load(array('title' => $tagText))) {
                    $newTags[] = (int) $tagTable->id;
                } else {
                    // Prepare tag data
                    $tagTable->id = 0;
                    $tagTable->title = $tagText;
                    $tagTable->published = 1;
                    $tagTable->description = '';
                    // $tagTable->language = property_exists ($item, 'language') ? $item->language : '*';
                    $tagTable->language = '*';
                    $tagTable->access = 1;
                    // Make this item a child of the root tag
                    $tagTable->setLocation($tagTable->getRootId(), 'last-child');
                    // Try to store tag
                    if ($tagTable->check()) {
                        // Assign the alias as path (autogenerated tags have always level 1)
                        $tagTable->path = $tagTable->alias;
                        if ($tagTable->store()) {
                            $newTags[] = (int) $tagTable->id;
                        }
                    }
                }
            }
        }
        // At this point $tags is an array of all tag ids
        $this->tags = $newTags;
        $result = $newTags;
    }
    return $result;
}