/**
* Generate an RSS feed
*
* @return string RSS
*/
public function feedTask()
{
// Incoming
$tagstring = trim(Request::getVar('tag', '', 'request', 'none', 2));
// Ensure we were passed a tag
if (!$tagstring) {
throw new Exception(Lang::txt('COM_TAGS_NO_TAG'), 404);
}
// Break the string into individual tags
$tgs = explode(',', $tagstring);
// Sanitize the tag
$tags = array();
$added = array();
foreach ($tgs as $tag) {
// Load the tag
$tagobj = Tag::getInstance($tag);
if (in_array($tagobj->get('tag'), $added)) {
continue;
}
$added[] = $tagobj->get('tag');
// Ensure we loaded the tag's info from the database
if ($tagobj->exists()) {
$tags[] = $tagobj;
}
}
// Paging variables
$limitstart = Request::getInt('limitstart', 0);
$limit = Request::getInt('limit', Config::get('list_limit'));
$areas = array();
$searchareas = Event::trigger('tags.onTagAreas');
foreach ($searchareas as $area) {
$areas = array_merge($areas, $area);
}
// Get the active category
$area = Request::getVar('area', '');
$sort = Request::getVar('sort', '');
if ($area) {
$activeareas = array($area);
} else {
$activeareas = $areas;
}
// Get the search results
if (count($activeareas) > 1) {
$sqls = Event::trigger('tags.onTagView', array($tags, $limit, $limitstart, $sort, $activeareas));
if ($sqls) {
$s = array();
foreach ($sqls as $sql) {
if (!is_string($sql)) {
continue;
}
if (trim($sql) != '') {
$s[] = $sql;
}
}
$query = "(";
$query .= implode(") UNION (", $s);
$query .= ") ORDER BY ";
switch ($sort) {
case 'title':
$query .= 'title ASC, publish_up';
break;
case 'id':
$query .= "id DESC";
break;
case 'date':
default:
$query .= 'publish_up DESC, title';
break;
}
$query .= $limit != 'all' && $limit > 0 ? " LIMIT {$limitstart}, {$limit}" : "";
}
$this->database->setQuery($query);
$results = array($this->database->loadObjectList());
} else {
$results = Event::trigger('tags.onTagView', array($tags, $limit, $limitstart, $sort, $activeareas));
}
// Run through the array of arrays returned from plugins and find the one that returned results
$rows = array();
if ($results) {
foreach ($results as $result) {
if (is_array($result) && !empty($result)) {
$rows = $result;
break;
}
}
}
// Build some basic RSS document information
$title = Lang::txt(strtoupper($this->_option)) . ': ';
for ($i = 0, $n = count($tags); $i < $n; $i++) {
if ($i > 0) {
$title .= '+ ';
}
$title .= $tags[$i]->get('raw_tag') . ' ';
}
$title = trim($title);
$title .= ': ' . $area;
// Set the mime encoding for the document
Document::setType('feed');
// Start a new feed object
$doc = Document::instance();
$doc->link = Route::url('index.php?option=' . $this->_option);
$doc->title = Config::get('sitename') . ' - ' . $title;
$doc->description = Lang::txt('COM_TAGS_RSS_DESCRIPTION', Config::get('sitename'), $title);
$doc->copyright = Lang::txt('COM_TAGS_RSS_COPYRIGHT', gmdate("Y"), Config::get('sitename'));
$doc->category = Lang::txt('COM_TAGS_RSS_CATEGORY');
// Start outputing results if any found
if (count($rows) > 0) {
include_once PATH_CORE . DS . 'components' . DS . 'com_resources' . DS . 'helpers' . DS . 'helper.php';
foreach ($rows as $row) {
// Prepare the title
$title = strip_tags($row->title);
$title = html_entity_decode($title);
// Strip html from feed item description text
$description = html_entity_decode(String::truncate(Sanitize::stripAll(stripslashes($row->ftext)), 300));
$author = '';
@($date = $row->publish_up ? date('r', strtotime($row->publish_up)) : '');
if (isset($row->data3) || isset($row->rcount)) {
$resourceEx = new \Components\Resources\Helpers\Helper($row->id, $this->database);
$resourceEx->getCitationsCount();
$resourceEx->getLastCitationDate();
$resourceEx->getContributors();
$author = strip_tags($resourceEx->contributors);
}
// Load individual item creator class
$item = new \Hubzero\Document\Type\Feed\Item();
$item->title = $title;
$item->link = $row->href;
$item->description = $description;
$item->date = $date;
$item->category = isset($row->data1) ? $row->data1 : '';
$item->author = $author;
// Loads item info into rss array
$doc->addItem($item);
}
}
}
/**
* Remove tags from an item
*
* @param mixed $tags Array or string of tags
* @param integer $tagger ID of user to remove tags for
* @return mixed False if errors, integer on success
*/
public function remove($tags, $tagger = 0)
{
if (!$this->_scope_id) {
$this->setError('Unable to remove tags: No objct ID provided.');
return false;
}
if (!$tags) {
$this->setError('Unable to remove tags: No tag(s) provided.');
return false;
}
foreach ($this->_parse($tags) as $tg) {
$tag = Tag::getInstance((string) $tg);
// Does the tag exist?
if (!$tag->exists()) {
// Tag doesn't exist, no point in going any further
continue;
}
// Remove tag from object
if (!$tag->removeFrom($this->_scope, $this->_scope_id, $tagger)) {
$this->setError($tag->getError());
}
}
return true;
}
