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[user/henk/code/inspircd.git] / src / modules / m_spanningtree / ftopic.cpp

diff --git a/src/modules/m_spanningtree/ftopic.cpp b/src/modules/m_spanningtree/ftopic.cpp
index 4e57715f3d6caf826038068074f80b459de2cab5..2f9813860fe8803cae12fb202c1ebebe9d047927 100644 (file)
--- a/src/modules/m_spanningtree/ftopic.cpp
+++ b/src/modules/m_spanningtree/ftopic.cpp
@@ -1,7 +1,11 @@
 /*
  * InspIRCd -- Internet Relay Chat Daemon
  *
- *   Copyright (C) 2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2018 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012-2014, 2016 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
  *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
  *
  * This file is part of InspIRCd.  InspIRCd is free software: you can
@@ -21,31 +25,69 @@
 #include "inspircd.h"
 #include "commands.h"
 
-#include "treesocket.h"
-#include "treeserver.h"
-#include "utils.h"
-
 /** FTOPIC command */
-CmdResult CommandFTopic::Handle(const std::vector<std::string>& params, User *user)
+CmdResult CommandFTopic::Handle(User* user, Params& params)
 {
-       time_t ts = ConvToInt(params[1]);
        Channel* c = ServerInstance->FindChan(params[0]);
-       if (c)
+       if (!c)
+               return CMD_FAILURE;
+
+       if (c->age < ServerCommand::ExtractTS(params[1]))
+               // Our channel TS is older, nothing to do
+               return CMD_FAILURE;
+
+       // Channel::topicset is initialized to 0 on channel creation, so their ts will always win if we never had a topic
+       time_t ts = ServerCommand::ExtractTS(params[2]);
+       if (ts < c->topicset)
+               return CMD_FAILURE;
+
+       // The topic text is always the last parameter
+       const std::string& newtopic = params.back();
+
+       // If there is a setter in the message use that, otherwise use the message source
+       const std::string& setter = ((params.size() > 4) ? params[3] : (ServerInstance->Config->FullHostInTopic ? user->GetFullHost() : user->nick));
+
+       /*
+        * If the topics were updated at the exact same second, accept
+        * the remote only when it's "bigger" than ours as defined by
+        * string comparison, so non-empty topics always overridde
+        * empty topics if their timestamps are equal
+        *
+        * Similarly, if the topic texts are equal too, keep one topic
+        * setter and discard the other
+        */
+       if (ts == c->topicset)
        {
-               if ((ts >= c->topicset) || (c->topic.empty()))
-               {
-                       if (c->topic != params[3])
-                       {
-                               // Update topic only when it differs from current topic
-                               c->topic.assign(params[3], 0, ServerInstance->Config->Limits.MaxTopic);
-                               c->WriteChannel(user, "TOPIC %s :%s", c->name.c_str(), c->topic.c_str());
-                       }
-
-                       // Always update setter and settime.
-                       c->setby.assign(params[2], 0, 127);
-                       c->topicset = ts;
-               }
+               // Discard if their topic text is "smaller"
+               if (c->topic > newtopic)
+                       return CMD_FAILURE;
+
+               // If the texts are equal in addition to the timestamps, decide which setter to keep
+               if ((c->topic == newtopic) && (c->setby >= setter))
+                       return CMD_FAILURE;
        }
+
+       c->SetTopic(user, newtopic, ts, &setter);
        return CMD_SUCCESS;
 }
 
+// Used when bursting and in reply to RESYNC, contains topic setter as the 4th parameter
+CommandFTopic::Builder::Builder(Channel* chan)
+       : CmdBuilder("FTOPIC")
+{
+       push(chan->name);
+       push_int(chan->age);
+       push_int(chan->topicset);
+       push(chan->setby);
+       push_last(chan->topic);
+}
+
+// Used when changing the topic, the setter is the message source
+CommandFTopic::Builder::Builder(User* user, Channel* chan)
+       : CmdBuilder(user, "FTOPIC")
+{
+       push(chan->name);
+       push_int(chan->age);
+       push_int(chan->topicset);
+       push_last(chan->topic);
+}