private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wparam, IntPtr lparam, ref bool handled)
{
if (msg == WinApi.WM_COPYDATA)
{
var cds = (WinApi.COPYDATASTRUCT)Marshal.PtrToStructure(lparam, typeof(WinApi.COPYDATASTRUCT));
if (cds.cbData < 12)
return IntPtr.Zero;
var recv = (int)cds.dwData == Sig.Recv;
if (!recv)
return IntPtr.Zero;
var data = new byte[cds.cbData];
Marshal.Copy(cds.lpData, data, 0, cds.cbData);
var packet = new Packet(data, 0);
HandlePacket(packet);
}
return (IntPtr)1;
}
private void ProductsRequest(Packet packet)
{
if (packet.GetString() != "GetProductList" || !packet.GetBool()) // Is valid
return;
var currentPostId = packet.GetInt();
var post = Erinn.Posts.FirstOrDefault(p => p.Id == currentPostId);
if (post == null)
return;
packet.GetInt(); // Unk
packet.GetInt(); // Unk
var itemCount = packet.GetInt();
for (var i = 0; i < itemCount; i++) // List of item ids (duplicated later in the packet)
packet.GetInt();
itemCount = packet.GetInt();
for (var i = 0; i < itemCount; i++)
{
var itemId = packet.GetInt();
var item = post.Items.FirstOrDefault(a => a.Id == itemId);
var normalizedCost = packet.GetInt();
var stock = packet.GetInt();
packet.GetBool(); // Limited time
if (item != null)
{
item.Stock = stock;
item.Price = (int)Math.Round(normalizedCost * post.MerchantLevel.Discount, MidpointRounding.AwayFromZero);
}
var townCount = packet.GetInt();
for (var j = 0; j < townCount; j++)
{
var destId = packet.GetInt();
packet.GetInt(); // Stock at destination
var normalizedSellPrice = packet.GetInt();
var destPost = Erinn.Posts.FirstOrDefault(p => p.Id == destId);
if (destPost == null || item == null)
continue;
if (!post.Weights.ContainsKey(destPost.Id))
continue;
var weight = post.Weights[destPost.Id];
var profit = item.Profits.FirstOrDefault(p => p.Destination == destPost);
if (profit != null)
{
var sellPrice = (int)Math.Round(normalizedSellPrice * weight * item.MultiFactor + item.AddFactor,
MidpointRounding.AwayFromZero);
profit.Amount = sellPrice - item.Price;
}
}
}
PostSelect.SelectedItem = post;
//CalculateTrades();
}
private void HandlePacket(Packet packet)
{
if (packet.Op == Properties.Settings.Default.CommerceInfoRequestOp)
InfoRequest(packet);
else if (packet.Op == Properties.Settings.Default.CommerceInfoUpdateOp)
InfoUpdate(packet);
else if (packet.Op == Properties.Settings.Default.ProductListRequestOp)
ProductsRequest(packet);
}
private void InfoUpdate(Packet packet)
{
Erinn.Ducats = packet.GetLong();
var transportFlags = packet.GetLong(); // Transport type flags (Bitfield)
packet.GetInt(); // Unknown
var townCount = packet.GetShort();
for (var i = 0; i < townCount; i++)
{
var townId = packet.GetInt();
var tradingExp = packet.GetInt();
var town = Erinn.Posts.FirstOrDefault(t => t.Id == townId);
if (town != null)
town.MerchantLevel = GetMerchantLevel(tradingExp);
}
if (Properties.Settings.Default.SniffTransports)
{
foreach (var transport in Erinn.Transports)
{
transport.Enabled = (transportFlags & 1 << transport.Id) != 0;
}
}
}
/// <summary>Writes packet as bin and the length of it as int to buffer.</summary>
public Packet PutBin(Packet packet)
{
var val = packet.Build();
return PutInt(val.Length).PutBin(val);
}
