APISMgr.php
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<?php
/**
* @class APISMgr
* @version $Id: APISMgr.php 2101 2014-02-19 10:12:21Z natacha $
*
*/
define('NB_ANSWER_LIMIT',2000);
class APISMgr
{
function __construct()
{
}
function jdayToUTC($jday)
{
return round(($jday - 2440587.5) * 86400);
}
function jday($t) {
return $t / 86400 + 2440587.5;
}
function get($planet, $startTime, $stopTime, $datasets = null)
{
$planetNewName = ucfirst($planet);
list($y, $mo, $d, $h, $mi, $s) = sscanf($startTime,"%4d-%02d-%02dT%02d:%02d:%02d");
$start = mktime($h,$mi,$s,$mo,$d,$y);
list($y, $mo, $d, $h, $mi, $s) = sscanf($stopTime,"%4d-%02d-%02dT%02d:%02d:%02d");
$stop = mktime($h,$mi,$s,$mo,$d,$y);
$req = "SELECT * FROM apis.epn_core";
$req .= " WHERE target_name='".$planetNewName."'";
$req .= " AND dataproduct_type='im'";
$req .= " AND time_min>".$this->jday($start);
$req .= " AND time_min<".$this->jday($stop);
if (isset($datasets) && !in_array("all",$datasets))
{
$req .= " AND (";
$firstDatasetId = true;
foreach ($datasets as $dataset)
{
if (!$firstDatasetId)
$req .= " OR ";
$req .= "dataset_id ='".$dataset."'";
$firstDatasetId = false;
}
$req .= ")";
}
$req .= " ORDER BY time_min, dataset_id";
$postfields = array(
'REQUEST' => 'doQuery',
'LANG' => 'ADQL',
'QUERY' => $req,
'TIMEOUT' => '30',
'FORMAT' => 'VOTable/td'
);
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, EPNTAP_APIS);
curl_setopt($curl, CURLOPT_COOKIESESSION, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $postfields);
$req_res = curl_exec($curl);
curl_close($curl);
if (!$req_res)
return array('success' => false, 'message' => 'Error during TAP request');
$xml = new DOMDocument();
$xml->preserveWhiteSpace = false;
$xml->formatOutput = true;
$xml->loadXML($req_res);
$fields = $xml->getElementsByTagName('FIELD');
$tabledatas = $xml->getElementsByTagName('TABLEDATA');
$result = array();
$crtDate = 0;
$folderIndex = -1;
//$log = fopen(USERWSDIR."log","w");
//fprintf($log,$req_res);
$limitReached = false;
$lastDate = 0;
foreach ($tabledatas as $tabledata)
{
$trs = $tabledata->getElementsByTagName('TR');
$limitReached = ($trs->length >= NB_ANSWER_LIMIT);
foreach($trs as $tr)
{
$data = array();
$tds = $tr->getElementsByTagName('TD');
//fprintf($log,"=> ---------\n");
for ($i = 0; $i < $tds->length; $i++)
{
if ($fields->item($i)->getAttribute('ID') == 'time_min')
{
$time = $this->jdayToUTC($tds->item($i)->nodeValue);
$time = $time - ($time%86400);
$lastDate = $time;
//fprintf($log,"=> %s\n",$time);
if ($time != $crtDate)
{
$crtFolder = array('date' => date("Y-m-d H:i:s", $time), 'images' => array());
$crtDate = $time;
array_push($result,$crtFolder);
$folderIndex++;
}
}
if ($fields->item($i)->getAttribute('unit') == 'd')
{
$time = $this->jdayToUTC($tds->item($i)->nodeValue);
$data[$fields->item($i)->getAttribute('ID')] = date("Y-m-d H:i:s", $time);
//fprintf($log,"%s %s %s\n",$fields->item($i)->getAttribute('ID'),$tds->item($i)->nodeValue,$data[$fields->item($i)->getAttribute('ID')]);
}
else
$data[$fields->item($i)->getAttribute('ID')] = $tds->item($i)->nodeValue;
//fprintf($log,"%s = %s\n",$fields->item($i)->getAttribute('ID'),$data[$fields->item($i)->getAttribute('ID')]);
}
$data['name'] = basename($data['access_url']);
array_push($result[$folderIndex]['images'],$data);
}
}
$res= array('success' => true, 'result' => $result);
if ($limitReached)
$res['warning'] = 'Result limit reached ('.NB_ANSWER_LIMIT.'). The last result date is '.date("Y-m-d",$lastDate);
return $res;
}
}
/*define('EPNTAP_APIS','http://voparis-tap.obspm.fr/__system__/tap/run/tap/sync');
$tapMgr = new APISMgr();
$res = $tapMgr->get("saturn","1990-01-01T00:00:00","2015-01-01T00:00:00",array("all"));
//var_dump($res);*/
?>