+
+std::string ModeUserServerNoticeMask::ProcessNoticeMasks(User* user, const std::string& input)
+{
+ bool adding = true;
+ std::bitset<64> curr = user->snomasks;
+
+ for (std::string::const_iterator i = input.begin(); i != input.end(); ++i)
+ {
+ switch (*i)
+ {
+ case '+':
+ adding = true;
+ break;
+ case '-':
+ adding = false;
+ break;
+ case '*':
+ for (size_t j = 0; j < 64; j++)
+ {
+ if (ServerInstance->SNO->IsSnomaskUsable(j+'A'))
+ curr[j] = adding;
+ }
+ break;
+ default:
+ // For local users check whether the given snomask is valid and enabled - IsSnomaskUsable() tests both.
+ // For remote users accept what we were told, unless the snomask char is not a letter.
+ if (IS_LOCAL(user))
+ {
+ if (!ServerInstance->SNO->IsSnomaskUsable(*i))
+ {
+ user->WriteNumeric(ERR_UNKNOWNSNOMASK, *i, "is unknown snomask char to me");
+ continue;
+ }
+ }
+ else if (!(((*i >= 'a') && (*i <= 'z')) || ((*i >= 'A') && (*i <= 'Z'))))
+ continue;
+
+ size_t index = ((*i) - 'A');
+ curr[index] = adding;
+ break;
+ }
+ }
+
+ std::string plus = "+";
+ std::string minus = "-";
+
+ // Apply changes and construct two strings consisting of the newly added and the removed snomask chars
+ for (size_t i = 0; i < 64; i++)
+ {
+ bool isset = curr[i];
+ if (user->snomasks[i] != isset)
+ {
+ user->snomasks[i] = isset;
+ std::string& appendhere = (isset ? plus : minus);
+ appendhere.push_back(i+'A');
+ }
+ }
+
+ // Create the final string that will be shown to the user and sent to servers
+ // Form: "+ABc-de"
+ std::string output;
+ if (plus.length() > 1)
+ output = plus;
+
+ if (minus.length() > 1)
+ output += minus;
+
+ // Unset the snomask usermode itself if every snomask was unset
+ if (user->snomasks.none())
+ user->SetMode(this, false);
+
+ return output;
+}