/**
* Return list of JP2 files to use for JPX generation selected by Mid Points
*
* @return array List of filepaths of images to use during JPX generation
* as well as a list of the times for each image in the
* series.
*/
private function _queryJPXImageFramesMidPoint()
{
include_once HV_ROOT_DIR . '/../src/Helper/DateTimeConversions.php';
include_once HV_ROOT_DIR . '/../src/Database/ImgIndex.php';
$imgIndex = new Database_ImgIndex();
// Parse List of dates and convert them to Unix Timestaps
$startTimesArray = explode(',', $this->_startTime);
$endTimesArray = explode(',', $this->_endTime);
if (count($startTimesArray) < 1 || count($endTimesArray) < 1) {
throw new Exception('At least one Start and End date need to be specified. Please use timestamps separated with commas.', 61);
}
if (count($startTimesArray) != count($endTimesArray)) {
throw new Exception('Number of Start dates doesn\'t match the number of End dates. Please use equal amount of Start and End dates.', 61);
}
$images = array();
$dates = array();
foreach ($startTimesArray as $k => $start) {
$end = $endTimesArray[$k];
$middle = round(($start + $end) / 2);
$results = $imgIndex->getDataMidPoint($start, $end, $middle, $this->_sourceId);
if ($results && isset($results['id'])) {
$filepath = HV_JP2_DIR . $results['filepath'] . '/' . $results['filename'];
array_push($images, $filepath);
array_push($dates, strtotime($results['date']));
} else {
array_push($images, null);
array_push($dates, null);
}
}
return array($images, $dates);
}
