/**
* Update keywords from input array
* @param ilMDGeneral $a_md_section
* @param array $a_keywords lang => keywords
*/
public static function updateKeywords(ilMDGeneral $a_md_section, array $a_keywords)
{
// trim keywords
$new_keywords = array();
foreach ($a_keywords as $lang => $keywords) {
foreach ($keywords as $keyword) {
$keyword = trim($keyword);
if ($keyword != "" && !(is_array($new_keywords[$lang]) && in_array($keyword, $new_keywords[$lang]))) {
$new_keywords[$lang][] = $keyword;
}
}
}
// update existing author entries (delete if not entered)
foreach ($ids = $a_md_section->getKeywordIds() as $id) {
$md_key = $a_md_section->getKeyword($id);
$lang = $md_key->getKeywordLanguageCode();
// entered keyword already exists
if (is_array($new_keywords[$lang]) && in_array($md_key->getKeyword(), $new_keywords[$lang])) {
unset($new_keywords[$lang][array_search($md_key->getKeyword(), $new_keywords[$lang])]);
} else {
$md_key->delete();
}
}
// insert entered, but not existing keywords
foreach ($new_keywords as $lang => $key_arr) {
foreach ($key_arr as $keyword) {
if ($keyword != "") {
$md_key = $a_md_section->addKeyword();
$md_key->setKeyword(ilUtil::stripSlashes($keyword));
$md_key->setKeywordLanguage(new ilMDLanguageItem($lang));
$md_key->save();
}
}
}
}
