Return old fakeonline module as modules_online

It was accidentally dropped in 0.207 because of the confusing name,
it looked too much like antiidle module.

Instead, this module tells broken clients like Colloquy that *status and
*module are "online". Otherwise those clients require user to always
prepend messages to *module with "/msg *module", even if the window of
*module's query is active.

Also fix the module to support network modules

modules/modules_online.cpp

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2004-2013 ZNC, see the NOTICE file for details.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <znc/User.h>
+#include <znc/IRCNetwork.h>
+#include <znc/znc.h>
+
+class CFOModule : public CModule {
+public:
+	MODCONSTRUCTOR(CFOModule) {}
+	virtual ~CFOModule() {}
+
+	bool IsOnlineModNick(const CString& sNick) {
+		const CString& sPrefix = m_pUser->GetStatusPrefix();
+		if (!sNick.Equals(sPrefix, false, sPrefix.length()))
+			return false;
+
+		CString sModNick = sNick.substr(sPrefix.length());
+		if (sModNick.Equals("status") ||
+				m_pNetwork->GetModules().FindModule(sModNick) ||
+				m_pUser->GetModules().FindModule(sModNick) ||
+				CZNC::Get().GetModules().FindModule(sModNick))
+			return true;
+		return false;
+	}
+
+	virtual EModRet OnUserRaw(CString& sLine) {
+		//Handle ISON
+		if (sLine.Token(0).Equals("ison")) {
+			VCString vsNicks;
+			VCString::const_iterator it;
+
+			// Get the list of nicks which are being asked for
+			sLine.Token(1, true).TrimLeft_n(":").Split(" ", vsNicks, false);
+
+			CString sBNCNicks;
+			for (it = vsNicks.begin(); it != vsNicks.end(); ++it) {
+				if (IsOnlineModNick(*it)) {
+					sBNCNicks += " " + *it;
+				}
+			}
+			// Remove the leading space
+			sBNCNicks.LeftChomp();
+
+			if (!m_pNetwork->GetIRCSock()) {
+				// if we are not connected to any IRC server, send
+				// an empty or module-nick filled response.
+				PutUser(":irc.znc.in 303 " + m_pClient->GetNick() + " :" + sBNCNicks);
+			} else {
+				// We let the server handle this request and then act on
+				// the 303 response from the IRC server.
+				m_ISONRequests.push_back(sBNCNicks);
+			}
+		}
+
+		//Handle WHOIS
+		if (sLine.Token(0).Equals("whois")) {
+			CString sNick = sLine.Token(1);
+
+			if (IsOnlineModNick(sNick)) {
+				PutUser(":znc.in 311 " + m_pNetwork->GetCurNick() + " " + sNick + " " + sNick + " znc.in * :" + sNick);
+				PutUser(":znc.in 312 " + m_pNetwork->GetCurNick() + " " + sNick + " *.znc.in :Bouncer");
+				PutUser(":znc.in 318 " + m_pNetwork->GetCurNick() + " " + sNick + " :End of /WHOIS list.");
+
+				return HALT;
+			}
+		}
+
+		return CONTINUE;
+	}
+
+	virtual EModRet OnRaw(CString& sLine) {
+		//Handle 303 reply if m_Requests is not empty
+		if (sLine.Token(1) == "303" && !m_ISONRequests.empty()) {
+			VCString::iterator it = m_ISONRequests.begin();
+
+			sLine.Trim();
+
+			// Only append a space if this isn't an empty reply
+			if (sLine.Right(1) != ":") {
+				sLine += " ";
+			}
+
+			//add BNC nicks to the reply
+			sLine += *it;
+			m_ISONRequests.erase(it);
+		}
+
+		return CONTINUE;
+	}
+
+private:
+	VCString m_ISONRequests;
+};
+
+template<> void TModInfo<CFOModule>(CModInfo& Info) {
+	Info.SetWikiPage("modules_online");
+}
+
+NETWORKMODULEDEFS(CFOModule, "Make ZNC's *modules to be \"online\".")