require_once '../tag/lib.php';
$action = optional_param('action', '', PARAM_ALPHA);
require_login();
if (empty($CFG->usetags)) {
error('Tags are disabled!');
}
if (isguestuser()) {
print_error('noguest');
}
if (!confirm_sesskey()) {
print_error('sesskey');
}
switch ($action) {
case 'addinterest':
$id = optional_param('id', 0, PARAM_INT);
$name = optional_param('name', '', PARAM_TEXT);
if (empty($name) && $id) {
$name = tag_name($id);
}
tag_an_item('user', $USER->id, $name);
if (!empty($name) && !$id) {
$id = tag_id(tag_normalize($name));
}
redirect($CFG->wwwroot . '/tag/index.php?id=' . $id);
break;
case 'flaginappropriate':
$id = required_param('id', PARAM_INT);
tag_flag_inappropriate($id);
redirect($CFG->wwwroot . '/tag/index.php?id=' . $id, get_string('responsiblewillbenotified', 'tag'));
break;
}
/**
* function to attach tags into a post
* @param int postid - id of the blog
*/
function add_tags_info($postid)
{
global $USER;
$post = get_record('post', 'id', $postid);
/// Attach official tags
if ($otags = optional_param('otags', '', PARAM_INT)) {
foreach ($otags as $otag) {
$tag->tagid = $otag;
//insert_record('blog_tag_instance', $tag);
tag_an_item('blog', $postid, $otag, 'official');
}
}
/// Attach Personal Tags
if ($ptags = optional_param('ptags', '', PARAM_NOTAGS)) {
$ptags = explode(',', $ptags);
foreach ($ptags as $ptag) {
$ptag = trim($ptag);
// check for existance
// it does not matter whether it is an offical tag or personal tag
// we do not want to have 1 copy of offical tag and 1 copy of personal tag (for the same tag)
if ($ctag = tag_by_id($ptag)) {
tag_an_item('blog', $postid, $ctag);
} else {
// create a personal tag
if ($tagid = tag_create($ptag)) {
if ($tagid = array_shift($tagid)) {
tag_an_item('blog', $postid, $tagid);
}
}
}
}
}
}
/**
* Updates the tags associated with an item
*
* Ex 1:
* Suppose user 1 is tagged only with "algorithms", "computers" and "software"
* By calling update_item_tags('user', 1, 'algorithms, software, mathematics')
* User 1 will now be tagged only with "algorithms", "software" and "mathematics"
*
* Ex 2:
* update_item_tags('user', '1', 'algorithms, 12, 13')
* User 1 will now be tagged only with "algorithms", and with tags of ids 12 and 13
*
*
* @param string $item_type name of the table where the item is stored. Ex: 'user'
* @param string $item_id id of the item to be tagged
* @param string $tag_names_or_ids_csv comma separated tag names (can be unormalized) or ids of existing tags
* @param string $tag_type type of the tags that are beeing added (optional, default value is "default")
*/
function update_item_tags($item_type, $item_id, $tag_names_or_ids_csv, $tag_type = "default")
{
//if $tag_names_csv is an empty string, remove all tag associations of the item
if (empty($tag_names_or_ids_csv)) {
untag_an_item($item_type, $item_id);
return;
}
//convert any tag ids passed to their corresponding tag names
$tag_names_csv = tag_name_from_string($tag_names_or_ids_csv);
//associate the tags passed with the item
tag_an_item($item_type, $item_id, $tag_names_csv, $tag_type);
//get the ids of the tags passed
$existing_and_new_tags_ids = tags_id(tag_normalize($tag_names_csv));
// delete any tag instance with $item_type and $item_id
// that are not in $tag_names_csv
$tags_id_csv = "'" . implode("','", $existing_and_new_tags_ids) . "'";
$select = "\n itemid = '{$item_id}'\n AND\n itemtype = '{$item_type}'\n AND\n tagid NOT IN ({$tags_id_csv})\n ";
delete_records_select('tag_instance', $select);
}
