starting fresh for the third time

3 files changed, 161 insertions, 0 deletions

diff --git a/packets/header.go b/packets/header.go
new file mode 100644
index 0000000..60cd146
--- /dev/null
+++ b/packets/header.go
@@ -0,0 +1,33 @@
+package packets
+
+import (
+        "fmt"
+
+        "github.com/pektezol/bitreader"
+)
+
+func ParseHeader(reader *bitreader.ReaderType) {
+        header := Header{
+                DemoFileStamp:   reader.TryReadStringLen(8),
+                DemoProtocol:    uint(reader.TryReadInt32()),
+                NetworkProtocol: uint(reader.TryReadInt32()),
+                ServerName:      reader.TryReadStringLen(260),
+                ClientName:      reader.TryReadStringLen(260),
+                MapName:         reader.TryReadStringLen(260),
+                GameDirectory:   reader.TryReadStringLen(260),
+                PlaybackTime:    reader.TryReadFloat32(),
+                PlaybackTicks:   int(reader.TryReadInt32()),
+                PlaybackFrames:  int(reader.TryReadInt32()),
+                SignOnLength:    uint(reader.TryReadInt32()),
+        }
+        if header.DemoFileStamp != "HL2DEMO" {
+                panic("Invalid demo file stamp. Make sure a valid demo file is given.")
+        }
+        if header.DemoProtocol != 4 {
+                panic("Given demo is from old engine. This parser is only supported for new engine.")
+        }
+        if header.NetworkProtocol != 2001 {
+                panic("Given demo is not from Portal2. This parser currently only supports Portal 2.")
+        }
+        fmt.Println(header)
+}
diff --git a/packets/message.go b/packets/message.go
new file mode 100644
index 0000000..a8e830d
--- /dev/null
+++ b/packets/message.go
@@ -0,0 +1,64 @@
+package packets
+
+import (
+        "fmt"
+
+        "github.com/pektezol/bitreader"
+)
+
+func ParseMessage(reader *bitreader.ReaderType) (status int) {
+        messageType := reader.TryReadInt8()
+        messageTick := reader.TryReadInt32()
+        messageSlot := reader.TryReadInt8()
+        //fmt.Println(messageType, messageTick, messageSlot)
+        switch messageType {
+        case 0x01:
+                //signOn := SignOn{}
+                reader.SkipBytes(76*2 + 8)
+                val := reader.TryReadInt32()
+                reader.SkipBytes(int(val))
+                fmt.Printf("[%d] (%d) {%d} SignOn: \n", messageTick, messageType, messageSlot)
+                return 1
+        case 0x02:
+                reader.SkipBytes(76*2 + 8)
+                val := reader.TryReadInt32()
+                reader.SkipBytes(int(val))
+                // fmt.Printf("[%d] (%d) Packet: \n", messageTick, messageType)
+                return 2
+        case 0x03:
+                fmt.Printf("[%d] (%d) SyncTick: \n", messageTick, messageType)
+                return 3
+        case 0x04:
+                val := reader.TryReadInt32()
+                reader.SkipBytes(int(val))
+                // fmt.Printf("[%d] (%d) ConsoleCmd: \n", messageTick, messageType)
+                return 4
+        case 0x05:
+                reader.SkipBytes(4)
+                val := reader.TryReadInt32()
+                reader.SkipBytes(int(val))
+                // fmt.Printf("[%d] (%d) UserCmd: \n", messageTick, messageType)
+                return 5
+        case 0x06:
+                val := reader.TryReadInt32()
+                reader.SkipBytes(int(val))
+                // fmt.Printf("[%d] (%d) DataTables: \n", messageTick, messageType)
+                return 6
+        case 0x07:
+                fmt.Printf("[%d] (%d) Stop: \n", messageTick, messageType)
+                return 7
+        case 0x08:
+                reader.SkipBytes(4)
+                val := reader.TryReadInt32()
+                reader.SkipBytes(int(val))
+                // fmt.Printf("[%d] (%d) CustomData: \n", messageTick, messageType)
+                return 8
+        case 0x09:
+                val := reader.TryReadInt32()
+                reader.SkipBytes(int(val))
+                // fmt.Printf("[%d] (%d) StringTables: \n", messageTick, messageType)
+                return 9
+        default:
+                return 0
+        }
+}
diff --git a/packets/types.go b/packets/types.go
new file mode 100644
index 0000000..5f7a29b
--- /dev/null
+++ b/packets/types.go
@@ -0,0 +1,64 @@
+package packets
+
+type Header struct {
+        DemoFileStamp   string
+        DemoProtocol    uint
+        NetworkProtocol uint
+        ServerName      string
+        ClientName      string
+        MapName         string
+        GameDirectory   string
+        PlaybackTime    float32
+        PlaybackTicks   int
+        PlaybackFrames  int
+        SignOnLength    uint
+}
+
+type SignOn struct {
+        PacketInfo  []byte
+        InSequence  int32
+        OutSequence int32
+        Size        int32
+        Data        []byte
+}
+
+type Packet struct {
+        PacketInfo  []byte
+        InSequence  int32
+        OutSequence int32
+        Size        int32
+        Data        []byte
+}
+
+type SyncTick struct{}
+
+type ConsoleCmd struct {
+        Size int32
+        Data string
+}
+
+type UserCmd struct {
+        Cmd  int32
+        Size int32
+        Data []byte
+}
+
+type DataTables struct {
+        Size int32
+        Data []byte
+}
+
+type Stop struct {
+        RemainingData []byte
+}
+
+type CustomData struct {
+        Unknown int32
+        Size    int32
+        Data    []byte
+}
+
+type StringTables struct {
+        Size int32
+        Data []byte
+}