feat(Core/Packets): Port packet handling from TrinityCore (#5617)

* feat(Core/Packets): Port packet handling from TrinityCore

* 1

* 2

* 3

* 1

* 2

* #3670

* 3

* 1

* codestyle

* fix msvc warnings

src/server/game/Server/WorldPacket.h

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef _WORLDPACKET_H_
+#define _WORLDPACKET_H_
+
+#include "Common.h"
+#include "Opcodes.h"
+#include "ByteBuffer.h"
+#include "Duration.h"
+
+class WorldPacket : public ByteBuffer
+{
+public:
+    // just container for later use
+    WorldPacket() : ByteBuffer(0), m_opcode(NULL_OPCODE) { }
+
+    explicit WorldPacket(uint16 opcode, size_t res = 200) :
+        ByteBuffer(res), m_opcode(opcode) { }
+
+    WorldPacket(WorldPacket&& packet) noexcept :
+        ByteBuffer(std::move(packet)), m_opcode(packet.m_opcode) { }
+
+    WorldPacket(WorldPacket&& packet, TimePoint receivedTime) :
+        ByteBuffer(std::move(packet)), m_opcode(packet.m_opcode), m_receivedTime(receivedTime) { }
+
+    WorldPacket(WorldPacket const& right) :
+        ByteBuffer(right), m_opcode(right.m_opcode) { }
+
+    WorldPacket& operator=(WorldPacket const& right)
+    {
+        if (this != &right)
+        {
+            m_opcode = right.m_opcode;
+            ByteBuffer::operator=(right);
+        }
+
+        return *this;
+    }
+
+    WorldPacket& operator=(WorldPacket&& right) noexcept
+    {
+        if (this != &right)
+        {
+            m_opcode = right.m_opcode;
+            ByteBuffer::operator=(std::move(right));
+        }
+
+        return *this;
+    }
+
+    WorldPacket(uint16 opcode, MessageBuffer&& buffer) :
+        ByteBuffer(std::move(buffer)), m_opcode(opcode) { }
+
+    void Initialize(uint16 opcode, size_t newres = 200)
+    {
+        clear();
+        _storage.reserve(newres);
+        m_opcode = opcode;
+    }
+
+    [[nodiscard]] uint16 GetOpcode() const { return m_opcode; }
+    void SetOpcode(uint16 opcode) { m_opcode = opcode; }
+
+    [[nodiscard]] TimePoint GetReceivedTime() const { return m_receivedTime; }
+
+protected:
+    uint16 m_opcode;
+    TimePoint m_receivedTime; // only set for a specific set of opcodes, for performance reasons.
+};
+
+#endif