Core/Chat: Unify chat hyperlink parsing (PR #22417)

- Validate most link properties all the time
- If enabled, also validate link text (needs locale)
- Instead of blocking the entire message, sanitize it
- Apply filtering to DND/AFK messages. Closes #22399

(cherry picked from commit f27284594b)

src/server/game/Chat/Chat.cpp

@@ -19,7 +19,6 @@
 #include "AccountMgr.h"
 #include "CellImpl.h"
 #include "CharacterCache.h"
-#include "ChatLink.h"
 #include "ChatPackets.h"
 #include "Common.h"
 #include "DatabaseEnv.h"
@@ -37,6 +36,7 @@
 #include "World.h"
 #include "WorldSession.h"
 #include <boost/algorithm/string/replace.hpp>
+#include <sstream>
 
 // Lazy loading of the command table cache from commands and the
 // ScriptMgr should be thread safe since the player commands,
@@ -445,66 +445,6 @@ bool ChatHandler::ParseCommands(char const* text)
     return _ParseCommands(text+1);
 }
 
-bool ChatHandler::isValidChatMessage(char const* message)
-{
-/*
-Valid examples:
-|cffa335ee|Hitem:812:0:0:0:0:0:0:0:70|h[Glowing Brightwood Staff]|h|r
-|cffffff00|Hquest:51101:-1:110:120:5|h[The Wounded King]|h|r
-|cffffd000|Htrade:4037:1:150:1:6AAAAAAAAAAAAAAAAAAAAAAOAADAAAAAAAAAAAAAAAAIAAAAAAAAA|h[Engineering]|h|r
-|cff4e96f7|Htalent:2232:-1|h[Taste for Blood]|h|r
-|cff71d5ff|Hspell:21563|h[Command]|h|r
-|cffffd000|Henchant:3919|h[Engineering: Rough Dynamite]|h|r
-|cffffff00|Hachievement:546:0000000000000001:0:0:0:-1:0:0:0:0|h[Safe Deposit]|h|r
-|cff66bbff|Hglyph:21:762|h[Glyph of Bladestorm]|h|r
-
-| will be escaped to ||
-*/
-
-    if (strlen(message) > 255)
-        return false;
-
-    // more simple checks
-    if (sWorld->getIntConfig(CONFIG_CHAT_STRICT_LINK_CHECKING_SEVERITY) < 3)
-    {
-        const char validSequence[6] = "cHhhr";
-        const char* validSequenceIterator = validSequence;
-        const std::string validCommands = "cHhr|";
-
-        while (*message)
-        {
-            // find next pipe command
-            message = strchr(message, '|');
-
-            if (!message)
-                return true;
-
-            ++message;
-            char commandChar = *message;
-            if (validCommands.find(commandChar) == std::string::npos)
-                return false;
-
-            ++message;
-            // validate sequence
-            if (sWorld->getIntConfig(CONFIG_CHAT_STRICT_LINK_CHECKING_SEVERITY) == 2)
-            {
-                if (commandChar == *validSequenceIterator)
-                {
-                    if (validSequenceIterator == validSequence + 4)
-                        validSequenceIterator = validSequence;
-                    else
-                        ++validSequenceIterator;
-                }
-                else
-                    return false;
-            }
-        }
-        return true;
-    }
-
-    return LinkExtractor(message).IsValidMessage();
-}
-
 bool ChatHandler::ShowHelpForSubCommands(std::vector<ChatCommand> const& table, char const* cmd, char const* subcmd)
 {
     std::string list;