Add m_chanhistory, mode +H <lines> to replay some lines of history on channel join

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@11895 e03df62e-2008-0410-955e-edbf42e46eb7

2 files changed, 107 insertions, 1 deletions

diff --git a/src/modules/m_chanhistory.cpp b/src/modules/m_chanhistory.cpp
new file mode 100644
index 000000000..f440040b7
--- /dev/null
+++ b/src/modules/m_chanhistory.cpp
@@ -0,0 +1,106 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+
+/* $ModDesc: Provides channel history for a given number of lines */
+
+struct HistoryItem
+{
+	time_t ts;
+	std::string line;
+	HistoryItem(const std::string& Line) : ts(ServerInstance->Time()), line(Line) {}
+};
+
+struct HistoryList
+{
+	std::deque<HistoryItem> lines;
+	unsigned int max;
+	HistoryList(unsigned int Max) : max(Max) {}
+};
+
+class HistoryMode : public ModeHandler
+{
+ public:
+	SimpleExtItem<HistoryList> ext;
+	HistoryMode(Module* Creator) : ModeHandler(Creator, "history", 'H', PARAM_SETONLY, MODETYPE_CHANNEL),
+		ext("history", Creator) { }
+
+	ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
+	{
+		int max = atoi(parameter.c_str());
+		if (adding && max == 0)
+			return MODEACTION_DENY;
+		if (adding)
+		{
+			ext.set(channel, new HistoryList(max));
+			channel->SetModeParam('H', parameter);
+		}
+		else
+		{
+			ext.unset(channel);
+			channel->SetModeParam('H', "");
+		}
+		return MODEACTION_ALLOW;
+	}
+};
+
+class ModuleChanHistory : public Module
+{
+	HistoryMode m;
+
+ public:
+
+	ModuleChanHistory() : m(this)
+	{
+		if (!ServerInstance->Modes->AddMode(&m))
+			throw ModuleException("Could not add new modes!");
+
+		Implementation eventlist[] = { I_OnUserJoin, I_OnUserMessage };
+		ServerInstance->Modules->Attach(eventlist, this, 2);
+	}
+
+	void OnUserMessage(User* user,void* dest,int target_type, const std::string &text, char status, const CUList&)
+	{
+		if (target_type == TYPE_CHANNEL && status == 0)
+		{
+			Channel* c = (Channel*)dest;
+			HistoryList* list = m.ext.get(c);
+			if (list)
+			{
+				char buf[MAXBUF];
+				snprintf(buf, MAXBUF, ":%s PRIVMSG %s :%s",
+					user->GetFullHost().c_str(), c->name.c_str(), text.c_str());
+				list->lines.push_back(HistoryItem(buf));
+				if (list->lines.size() > list->max)
+					list->lines.pop_front();
+			}
+		}
+	}
+
+	void OnUserJoin(Membership* memb, bool sync, bool created, CUList& except_list)
+	{
+		HistoryList* list = m.ext.get(memb->chan);
+		if (!list)
+			return;
+		for(std::deque<HistoryItem>::iterator i = list->lines.begin(); i != list->lines.end(); ++i)
+			memb->user->Write(i->line);
+	}
+
+	Version GetVersion()
+	{
+		return Version("Provides channel history replayed on join", VF_COMMON | VF_VENDOR);
+	}
+};
+
+MODULE_INIT(ModuleChanHistory)
diff --git a/src/modules/m_joinflood.cpp b/src/modules/m_joinflood.cpp
index 2b4a006f7..e0555b37f 100644
--- a/src/modules/m_joinflood.cpp
+++ b/src/modules/m_joinflood.cpp
@@ -17,7 +17,7 @@
 
 /** Holds settings and state associated with channel mode +j
  */
-class joinfloodsettings : public classbase
+class joinfloodsettings
 {
  public:
 	int secs;