From a7ebc19c59ba835744297dfba1566773ac557e0c Mon Sep 17 00:00:00 2001
From: danieldg <danieldg@e03df62e-2008-0410-955e-edbf42e46eb7>
Date: Sat, 17 Oct 2009 23:37:27 +0000
Subject: Fix channel mode +H to allow maximum length and add explanatory
 message prefix

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@11897 e03df62e-2008-0410-955e-edbf42e46eb7
---
 src/modules/m_chanhistory.cpp | 35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

diff --git a/src/modules/m_chanhistory.cpp b/src/modules/m_chanhistory.cpp
index f440040b7..0e5bfd082 100644
--- a/src/modules/m_chanhistory.cpp
+++ b/src/modules/m_chanhistory.cpp
@@ -25,8 +25,8 @@ struct HistoryItem
 struct HistoryList
 {
 	std::deque<HistoryItem> lines;
-	unsigned int max;
-	HistoryList(unsigned int Max) : max(Max) {}
+	unsigned int maxlen, maxtime;
+	HistoryList(unsigned int len, unsigned int time) : maxlen(len), maxtime(time) {}
 };
 
 class HistoryMode : public ModeHandler
@@ -38,12 +38,16 @@ class HistoryMode : public ModeHandler
 
 	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));
+			std::string::size_type colon = parameter.find(':');
+			if (colon == std::string::npos)
+				return MODEACTION_DENY;
+			int len = atoi(parameter.substr(0, colon).c_str());
+			int time = atoi(parameter.substr(colon+1).c_str());
+			if (len <= 0 || time < 0 || len > 50)
+				return MODEACTION_DENY;
+			ext.set(channel, new HistoryList(len, time));
 			channel->SetModeParam('H', parameter);
 		}
 		else
@@ -58,9 +62,7 @@ class HistoryMode : public ModeHandler
 class ModuleChanHistory : public Module
 {
 	HistoryMode m;
-
  public:
-
 	ModuleChanHistory() : m(this)
 	{
 		if (!ServerInstance->Modes->AddMode(&m))
@@ -70,6 +72,11 @@ class ModuleChanHistory : public Module
 		ServerInstance->Modules->Attach(eventlist, this, 2);
 	}
 
+	~ModuleChanHistory()
+	{
+		ServerInstance->Modes->DelMode(&m);
+	}
+
 	void OnUserMessage(User* user,void* dest,int target_type, const std::string &text, char status, const CUList&)
 	{
 		if (target_type == TYPE_CHANNEL && status == 0)
@@ -82,7 +89,7 @@ class ModuleChanHistory : public Module
 				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)
+				if (list->lines.size() > list->maxlen)
 					list->lines.pop_front();
 			}
 		}
@@ -93,8 +100,16 @@ class ModuleChanHistory : public Module
 		HistoryList* list = m.ext.get(memb->chan);
 		if (!list)
 			return;
+		time_t mintime = 0;
+		if (list->maxtime)
+			mintime = ServerInstance->Time() - list->maxtime;
+		memb->user->WriteServ("NOTICE %s :Replaying up to %d lines of pre-join history spanning up to %d seconds",
+			memb->chan->name.c_str(), list->maxlen, list->maxtime);
 		for(std::deque<HistoryItem>::iterator i = list->lines.begin(); i != list->lines.end(); ++i)
-			memb->user->Write(i->line);
+		{
+			if (i->ts >= mintime)
+				memb->user->Write(i->line);
+		}
 	}
 
 	Version GetVersion()
-- 
cgit v1.2.3