1 files changed, 178 insertions, 0 deletions
diff --git a/packet/command/deltausercommand/deltausercommand.go b/packet/command/deltausercommand/deltausercommand.go
new file mode 100644
index 0000000..3a18371
--- /dev/null
+++ b/packet/command/deltausercommand/deltausercommand.go
@@ -0,0 +1,178 @@
+package deltausercommand
+
+import (
+	"github.com/osm/quake/common/buffer"
+	"github.com/osm/quake/common/context"
+	"github.com/osm/quake/protocol"
+)
+
+type Command struct {
+	ProtocolVersion uint32
+
+	Bits byte
+
+	CMAngle1    float32
+	CMAngle2    float32
+	CMAngle3    float32
+	CMForward8  byte
+	CMForward16 uint16
+	CMSide8     byte
+	CMSide16    uint16
+	CMUp8       byte
+	CMUp16      uint16
+	CMButtons   byte
+	CMImpulse   byte
+	CMMsec      byte
+}
+
+func (cmd *Command) Bytes() []byte {
+	buf := buffer.New()
+
+	buf.PutByte(cmd.Bits)
+
+	if cmd.Bits&protocol.CMAngle1 != 0 {
+		buf.PutAngle16(cmd.CMAngle1)
+	}
+
+	if cmd.Bits&protocol.CMAngle2 != 0 {
+		buf.PutAngle16(cmd.CMAngle2)
+	}
+
+	if cmd.Bits&protocol.CMAngle3 != 0 {
+		buf.PutAngle16(cmd.CMAngle3)
+	}
+
+	if cmd.ProtocolVersion <= 26 {
+		if cmd.Bits&protocol.CMForward != 0 {
+			buf.PutByte(cmd.CMForward8)
+		}
+
+		if cmd.Bits&protocol.CMSide != 0 {
+			buf.PutByte(cmd.CMSide8)
+		}
+
+		if cmd.Bits&protocol.CMUp != 0 {
+			buf.PutByte(cmd.CMUp8)
+		}
+	} else {
+		if cmd.Bits&protocol.CMForward != 0 {
+			buf.PutUint16(cmd.CMForward16)
+		}
+
+		if cmd.Bits&protocol.CMSide != 0 {
+			buf.PutUint16(cmd.CMSide16)
+		}
+
+		if cmd.Bits&protocol.CMUp != 0 {
+			buf.PutUint16(cmd.CMUp16)
+		}
+	}
+
+	if cmd.Bits&protocol.CMButtons != 0 {
+		buf.PutByte(cmd.CMButtons)
+	}
+
+	if cmd.Bits&protocol.CMImpulse != 0 {
+		buf.PutByte(cmd.CMImpulse)
+	}
+
+	if cmd.ProtocolVersion <= 26 && cmd.Bits&protocol.CMMsec != 0 {
+		buf.PutByte(cmd.CMMsec)
+	} else if cmd.ProtocolVersion >= 27 {
+		buf.PutByte(cmd.CMMsec)
+	}
+
+	return buf.Bytes()
+}
+
+func Parse(ctx *context.Context, buf *buffer.Buffer) (*Command, error) {
+	var err error
+	var cmd Command
+
+	cmd.ProtocolVersion = ctx.GetProtocolVersion()
+
+	if cmd.Bits, err = buf.ReadByte(); err != nil {
+		return nil, err
+	}
+
+	if cmd.Bits&protocol.CMAngle1 != 0 {
+		if cmd.CMAngle1, err = buf.GetAngle16(); err != nil {
+			return nil, err
+		}
+	}
+
+	if cmd.Bits&protocol.CMAngle2 != 0 {
+		if cmd.CMAngle2, err = buf.GetAngle16(); err != nil {
+			return nil, err
+		}
+	}
+
+	if cmd.Bits&protocol.CMAngle3 != 0 {
+		if cmd.CMAngle3, err = buf.GetAngle16(); err != nil {
+			return nil, err
+		}
+	}
+
+	if cmd.ProtocolVersion <= 26 {
+		if cmd.Bits&protocol.CMForward != 0 {
+			if cmd.CMForward8, err = buf.ReadByte(); err != nil {
+				return nil, err
+			}
+		}
+
+		if cmd.Bits&protocol.CMSide != 0 {
+			if cmd.CMSide8, err = buf.ReadByte(); err != nil {
+				return nil, err
+			}
+		}
+
+		if cmd.Bits&protocol.CMUp != 0 {
+			if cmd.CMUp8, err = buf.ReadByte(); err != nil {
+				return nil, err
+			}
+		}
+	} else {
+		if cmd.Bits&protocol.CMForward != 0 {
+			if cmd.CMForward16, err = buf.GetUint16(); err != nil {
+				return nil, err
+			}
+		}
+
+		if cmd.Bits&protocol.CMSide != 0 {
+			if cmd.CMSide16, err = buf.GetUint16(); err != nil {
+				return nil, err
+			}
+		}
+
+		if cmd.Bits&protocol.CMUp != 0 {
+			if cmd.CMUp16, err = buf.GetUint16(); err != nil {
+				return nil, err
+			}
+		}
+
+	}
+
+	if cmd.Bits&protocol.CMButtons != 0 {
+		if cmd.CMButtons, err = buf.ReadByte(); err != nil {
+			return nil, err
+		}
+	}
+
+	if cmd.Bits&protocol.CMImpulse != 0 {
+		if cmd.CMImpulse, err = buf.ReadByte(); err != nil {
+			return nil, err
+		}
+	}
+
+	if cmd.ProtocolVersion <= 26 && cmd.Bits&protocol.CMMsec != 0 {
+		if cmd.CMMsec, err = buf.ReadByte(); err != nil {
+			return nil, err
+		}
+	} else if cmd.ProtocolVersion >= 27 {
+		if cmd.CMMsec, err = buf.ReadByte(); err != nil {
+			return nil, err
+		}
+	}
+
+	return &cmd, nil
+}