@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession(false);
User user = (User) session.getAttribute("user");
MessageBox messageBox = new MessageBox();
// Check the permissions.
if (user.getRole() == UserRole.ADMIN || user.getRole() == UserRole.EDITOR) {
if (request.getParameter("selectionIds") == null) {
// The method is called from the chain list page.
this.doGet(request, response);
} else {
// The method is called from the chain delete page.
String[] selection = (request.getParameter("selectionIds")).split(",");
List<String> selectionList = chainIdsToListOfTitles(selection);
for (int i = 0; i < selection.length; i++) {
ChainService.removeChain(Long.valueOf(selection[i].trim()));
}
// Form the success message.
messageBox.setTitle("The following chains have been successfully deleted:");
messageBox.setMessages(selectionList);
Messager.sendMessage(request, messageBox, MessageSeverity.SUCCESS);
response.sendRedirect(request.getContextPath() + "/ChainList");
}
} else {
// Form the error message.
messageBox.setTitle(
"Not enough previlegues to perform the operation. Please contact the administrator.");
Messager.sendMessage(request, messageBox, MessageSeverity.ERROR);
response.sendRedirect(request.getContextPath() + "/ChainList");
}
}
/**
* Retrieves the title of the chain with the given id and forms a list of titles.
*
* @param ids - an array of chain ids.
* @return a list of chain titles.
*/
private static List<String> chainIdsToListOfTitles(String[] ids) {
List<String> selectionList = new ArrayList<>();
for (String id : ids) {
selectionList.add(ChainService.openChain(Long.valueOf(id.trim())).getTitle());
}
return selectionList;
}