} elseif (isset($_GET['deleteannotation']) && !empty($_GET['type'])) {
$dbids = array();
if (!empty($_GET['dbids'])) {
$dbids = $_GET['dbids'];
}
// Delete annotation.
echo $pdfHandler->deletePDFAnnotation($_GET['type'], $dbids);
} elseif (isset($_GET['editannotation']) && !empty($_GET['dbid'])) {
// Edit PDF note text.
echo $pdfHandler->editPDFNote($_GET['dbid'], $_GET['text']);
} elseif (isset($_GET['savepdfnote']) && !empty($_GET['page']) && !empty($_GET['top']) && !empty($_GET['left'])) {
// Save new PDF note.
echo $pdfHandler->savePDFNote($_GET['page'], $_GET['top'], $_GET['left']);
} elseif (isset($_POST['savepdfmarkers']) && !empty($_POST['page']) && !empty($_POST['markers'])) {
// Save PDF markers.
echo $pdfHandler->savePDFMarkers($_POST['page'], $_POST['markers']);
} elseif (isset($_GET['getpdfmarkers'])) {
$users = null;
if (isset($_GET['users']) && $_GET['users'] === 'other') {
$users = 'other';
}
// Get PDF markers.
echo $pdfHandler->getPDFMarkers($users);
} elseif (isset($_GET['getpdfnotes'])) {
$users = null;
if (isset($_GET['users']) && $_GET['users'] === 'other') {
$users = 'other';
}
// Get PDF markers.
echo $pdfHandler->getPDFNotes($users);
} elseif (isset($_GET['downloadpdf'])) {
