autocycle: Only cycle once in 15 seconds

This should stop all fights against ChanServ. Please note that nothing will
happen if we are the only one in the channel after 15 secs since this module
only checks if it needs to do something when someone leaves a channel.

Signed-off-by: Uli Schlachter <psychon@znc.in>

modules/autocycle.cpp

@@ -11,7 +11,10 @@
 
 class CAutoCycleMod : public CModule {
 public:
-	MODCONSTRUCTOR(CAutoCycleMod) {}
+	MODCONSTRUCTOR(CAutoCycleMod) {
+		m_recentlyCycled.SetTTL(15 * 1000);
+	}
+
 	virtual ~CAutoCycleMod() {}
 
 	virtual bool OnLoad(const CString& sArgs, CString& sMessage) {
@@ -119,14 +122,20 @@ class CAutoCycleMod : public CModule {
 		if (!IsAutoCycle(Channel.GetName()))
 			return;
 
+		// Did we recently annoy opers via cycling of an empty channel?
+		if (m_recentlyCycled.HasItem(Channel.GetName()))
+			return;
+
 		// Is there only one person left in the channel?
 		if (Channel.GetNickCount() != 1)
 			return;
 
 		// Is that person us and we don't have op?
 		const CNick& pNick = Channel.GetNicks().begin()->second;
-		if (!pNick.HasPerm(CChan::Op) && pNick.GetNick().Equals(m_pUser->GetCurNick()))
+		if (!pNick.HasPerm(CChan::Op) && pNick.GetNick().Equals(m_pUser->GetCurNick())) {
 			Channel.Cycle();
+			m_recentlyCycled.AddItem(Channel.GetName());
+		}
 	}
 
 	bool AlreadyAdded(const CString& sInput) {
@@ -222,6 +231,7 @@ class CAutoCycleMod : public CModule {
 private:
 	vector<CString> m_vsChans;
 	vector<CString> m_vsNegChans;
+	TCacheMap<CString> m_recentlyCycled;
 };
 
 template<> void TModInfo<CAutoCycleMod>(CModInfo& Info) {