/**
* Sends a message over the network to notify another user that the application user wants to send
* a file.
*
* @param user The user asked to receive a file.
* @param file The file to send.
* @throws CommandException If the specified user is the application user, or there is no
* connection to the network, or the application user is away, or the specified user is away,
* or the file name is too long.
*/
public void sendFile(final User user, final File file) throws CommandException {
Validate.notNull(user, "User can not be null");
Validate.notNull(file, "File can not be null");
if (user.isMe()) {
throw new CommandException("You can not send a file to yourself");
} else if (!isConnected()) {
throw new CommandException("You can not send a file without being connected");
} else if (me.isAway()) {
throw new CommandException("You can not send a file while away");
} else if (user.isAway()) {
throw new CommandException("You can not send a file to a user that is away");
} else if (Tools.getBytes(file.getName()) > Constants.MESSAGE_MAX_BYTES) {
throw new CommandException(
"You can not send a file with a name with more than "
+ Constants.MESSAGE_MAX_BYTES
+ " bytes");
} else {
messages.sendFile(user, file);
}
}
