function wikipedia_search($procd_descr)
{
profiling_start('wikipedia_search');
$TERMS = wikipedia_process_term($procd_descr);
$url = wikipedia_url($TERMS);
$data = cached_file_get_contents($url);
Error::setPrepend($data);
Error::generate('debug', 'WIKIPEDIA');
eval('$arr = ' . $data . ';');
foreach ($arr['query']['pages'] as $k => $v) {
$title = urlencode($v['title']);
$url = urlencode($v['fullurl']);
// https://dgl.cx/2008/10/wikipedia-summary-dns
if ($k == -1) {
// not found
return array();
}
break;
}
// this is probably a topic from a random unintended field like "frequency analysis (cryptoanalysis)"
if (strlen($title) < strlen($TERMS) - 5 || strlen($title) > strlen($TERMS) + 5 || strrchr($title, '%28')) {
return array();
}
$store = array('title' => urldecode(str_replace('+', ' ', $title)), 'link' => urldecode($url), 'source' => 'wikipedia');
profiling_end('wikipedia_search');
return array($store);
}
function google_search($procd_descr)
{
$TERMS = urlencode($procd_descr . " Lecture Notes");
$USERIP = $_SERVER['REMOTE_ADDR'];
$url = "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q={$TERMS}&rsz=small";
$data = cached_file_get_contents($url);
$arr = json_decode($data, true);
$results = $arr['responseData']['results'];
$store = array();
foreach ($results as $elem) {
$link = $elem['url'];
$title = $elem['titleNoFormatting'];
array_push($store, array($title, $link));
}
return $store;
}
function itunesu_search($procd_descr)
{
$TERMS = urlencode($procd_descr);
$USERIP = $_SERVER['REMOTE_ADDR'];
ini_set('user_agent', 'iTunes/8.1');
$url = "http://ax.search.itunes.apple.com/WebObjects/MZSearch.woa/wa/advancedSearch?descriptionTerm={$TERMS}&media=iTunesU";
$data = cached_file_get_contents($url);
$parser = xml_parser_create();
xml_parse_into_struct($parser, $data, $xml);
xml_parser_free($parser);
$store = array();
foreach ($xml as $key => $elem) {
if ($elem['tag'] == 'GOTOURL' && $elem['level'] == 21 && $elem['type'] == 'open') {
array_push($store, array('url' => $elem['attributes']['URL'], 'title' => $elem['attributes']['DRAGGINGNAME'], 'art' => $xml[$key + 2]['attributes']['URL']));
}
}
return $store;
}
function youtube_query($TERMS, $srch)
{
$str = $TERMS . "+" . implode("+", $srch);
$url = "http://gdata.youtube.com/feeds/api/videos?q={$str}&orderby=relevance&start-index=1&max-results=2&v=2&format=5";
$data = cached_file_get_contents($url);
$parser = xml_parser_create();
xml_parse_into_struct($parser, $data, $xml);
xml_parser_free($parser);
$store = array();
foreach ($xml as $elem) {
//if($elem['tag'] == "MEDIA:THUMBNAIL") {
// echo "<img src=\"".$elem['attributes']['URL']."\" /><br/>";
//}
//print_r($elem);
$content = "";
if ($elem['tag'] == "CONTENT") {
$content = $elem['attributes']['SRC'];
//$content .= "(".$str.")";
array_push($store, $content);
}
}
return $store;
}
function get_news_from_feed($feedurl)
{
$xml = cached_file_get_contents($feedurl);
try {
libxml_use_internal_errors(true);
$xml = new SimpleXMLElement($xml);
} catch (Exception $ex) {
$xml = false;
}
$cnewstemplate = file_get_contents('templates/cnewsitem.html');
$cnews = "";
$cnewskeys = array('#HEADLINE#', '#LINK#');
if ($xml) {
foreach ($xml->xpath('/rss/channel/item') as $item) {
$newsdata = array((string) $item->title, (string) $item->link);
$cnews .= str_replace($cnewskeys, $newsdata, $cnewstemplate);
}
}
if ($cnews == '') {
// hack to hide community news altogether if an error occurs
$cnews = "<style>.cnews{display:none}</style>";
}
return $cnews;
}
function youtube_query($TERMS, $srch, $crs)
{
global $CONFIG;
profiling_start('youtube_query');
$TAGS = $srch;
$rtags = get_full_tags($crs);
$str = urlencode($TERMS);
//."+".implode("+", $srch);
$url = "http://gdata.youtube.com/feeds/api/videos?q={$str}&orderby=relevance&start-index=1&max-results=2&v=2&format=5";
$data = cached_file_get_contents($url);
$parser = xml_parser_create();
xml_parse_into_struct($parser, $data, $xml);
xml_parser_free($parser);
$store = array();
foreach ($xml as $elem) {
switch ($elem['tag']) {
case 'MEDIA:THUMBNAIL':
$content['thumbnail_url'] = $elem['attributes']['URL'];
$content['thumbnail_width'] = $elem['attributes']['WIDTH'];
$content['thumbnail_height'] = $elem['attributes']['HEIGHT'];
break;
case 'MEDIA:PLAYER':
$content['link'] = $elem['attributes']['URL'];
break;
case 'CONTENT':
if ($elem['attributes']['TYPE'] == 'application/x-shockwave-flash') {
$val = $elem['attributes']['SRC'];
} else {
continue 2;
}
$content['src'] = $val;
break;
case 'MEDIA:CATEGORY':
if ($val != 'Howto' && $val != 'Education' && $val != 'News' && $val != 'Tech') {
continue 2;
} else {
if ($val == 'Education') {
$content['rating'] += 5;
}
}
$val = $elem['value'];
$content[strtolower($elem['tag'])] = $val;
break;
case 'CATEGORY':
if ($elem['attributes']['SCHEME'] != 'http://gdata.youtube.com/schemas/2007/categories.cat') {
continue 2;
} else {
$val = $elem['attributes']['TERM'];
if ($val != 'Howto' && $val != 'Education' && $val != 'News' && $val != 'Tech') {
continue 2;
} else {
if ($val == 'Education') {
$content['rating'] += 5;
}
}
$content[strtolower($elem['tag'])] = $val;
}
break;
case 'MEDIA:KEYWORDS':
$val = $elem['value'];
if (!$val) {
continue 2;
}
if ($rtags) {
$matches = count_matches(explode(', ', $val), explode(',', $rtags));
} else {
$matches = false;
}
if ($matches > 0) {
$content[strtolower($elem['tag'])] = $val;
$content['rating'] += 5;
} else {
$content['rating'] -= 5;
continue 2;
}
break;
case 'MEDIA:DESCRIPTION':
// YT:RATING : attributes : NUMDISLIKES, NUMLIKES
$val = $elem['value'];
if ($rtags) {
$matches = count_matches(explode(' ', $val), explode(',', $rtags));
} else {
$matches = false;
}
if ($matches && $matches > 0) {
$content[strtolower($elem['tag'])] = $val;
$content['rating'] += 2;
} else {
$content['rating'] -= 2;
continue 2;
}
break;
case 'TITLE':
$val = $elem['value'];
$content[strtolower($elem['tag'])] = $val;
break;
case 'ENTRY':
if ($elem['type'] == 'open') {
$content = array('src' => false, 'title' => false, 'media:keywords' => false, 'media:description' => false, 'category' => false, 'rating' => 10, 'thumbnail_url' => false, 'thumbnail_width' => false, 'thumbnail_height' => false, 'link' => false, 'source' => 'youtube');
} else {
if ($elem['type'] == 'close') {
if ($content['rating'] > 8) {
if ($CONFIG['debug']) {
$content['title'] .= ' - rating=' . $content['rating'];
}
array_push($store, $content);
}
}
}
default:
}
}
profiling_end('youtube_query');
return $store;
}
