/**
* Returns legend data, querying WMS GetStyles and GetLegendGraphics
*/
function get_legend($mapname, $layername)
{
// Check cache
if (defined('GET_LEGEND_CACHE_EXPIRY') && GET_LEGEND_CACHE_EXPIRY) {
// Check cache folder
$cache_folder = defined('GET_LEGEND_CACHE_DIRECTORY') && GET_LEGEND_CACHE_DIRECTORY ? GET_LEGEND_CACHE_DIRECTORY : dirname(__FILE__) . '/legend_cache/';
if (!is_dir($cache_folder) && !@mkdir($cache_folder)) {
err500('Cannot create cache folder, check permissions and configuration.');
}
$cache_file = $cache_folder . '/' . md5($mapname . $layername);
$filemtime = @filemtime($cache_file);
// returns FALSE if file does not exist
if (!$filemtime or time() - $filemtime >= GET_LEGEND_CACHE_EXPIRY) {
file_put_contents($cache_file, serialize(build_legend($mapname, $layername)));
}
return unserialize(file_get_contents($cache_file));
}
return build_legend($mapname, $layername);
}
function get_trend_pulses()
{
session_write_close();
$params = array('range' => 7);
$graph = array();
$otx = new Otx();
$trend = $otx->get_events_from_all_pulses($params);
if (is_array($trend) && count($trend) > 0) {
$legend = build_legend(7);
foreach ($legend as $l) {
$graph[] = array('date' => $l, 'value' => intval($trend[$l]['value']));
}
}
return $graph;
}