From a77cf8169b42a4394e62f7a381ca546b27d0f723 Mon Sep 17 00:00:00 2001
From: Arda Serdar Pektezol <1669855+pektezol@users.noreply.github.com>
Date: Mon, 7 Nov 2022 16:09:44 +0300
Subject: starting fresh for the third time

---
 packets/header.go | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 packets/header.go

(limited to 'packets/header.go')

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)
+}
-- 
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