/**
* "Reads" a message for a user by returning it and setting the wasRead variabel of the message to
* true in the database. If the user isn't the receiver, the message isn't read and null is
* returned
*
* @param messageId a Long defining the message we want to read
* @param user the user who wants to read the message
* @return the Message given by the id with wasRead = true if the user is the receiver of the
* message or null if the user isn't the reciever of the message
*/
public Message read(Long messageId, User user) {
Message opened = messageDao.findOne(messageId);
if (opened == null || !opened.getReceiver().equals(user)) return null;
opened.setWasRead(true);
messageDao.save(opened);
return opened;
}
/**
* "Sends" a message by saving it to the database and setting the send date to now
*
* @param message SendDate may not be set, will be set to now.
* @return the message saved in the database (which is therefore "sent")
*/
private Message send(Message message) {
assert message.getSendDate() == null;
if (message.getReceiver().equals(message.getSender()))
throw new InvalidUserException("You cannot send yourself a message");
message.setSendDate(new Date());
message = messageDao.save(message);
mailService.sendMessageNotificationMail(message);
return message;
}
/**
* Returns all messages the user has received, ordered form newest send date to oldest.
*
* @param user from which we want to get all messages
* @return an ordered list of messages, form newest send date to oldest.
*/
@Transactional
public List<Message> getOrderedMessagesList(User user) {
List<Message> messages = (List<Message>) messageDao.findAllByReceiver(user);
Collections.sort(messages, MessageDateComparator);
return messages;
}