events: add TickRateInfoAvailable for CSVCMsg_ServerInfo (#296)

Author: markus-wa

pkg/demoinfocs/events/events.go

@@ -447,6 +447,13 @@ type SayText2 struct {
 	IsChatAll bool     // Seems to always be false, team chat might not be recorded
 }
 
+// TickRateInfoAvailable signals that the tick-rate information has been received via CSVCMsg_ServerInfo.
+// This can be useful for corrupt demo headers where the tick-rate is missing in the beginning of the demo.
+type TickRateInfoAvailable struct {
+	TickRate float64       // See Parser.TickRate()
+	TickTime time.Duration // See Parser.TickTime()
+}
+
 // ChatMessage signals a player generated chat message.
 // Since team chat is generally not recorded IsChatAll will probably always be false.
 // See SayText for admin / console messages and SayText2 for raw network package data.

pkg/demoinfocs/net_messages.go

@@ -65,4 +65,9 @@ func (p *parser) handleSetConVar(setConVar *msg.CNETMsg_SetConVar) {
 func (p *parser) handleServerInfo(srvInfo *msg.CSVCMsg_ServerInfo) {
 	// srvInfo.MapCrc might be interesting as well
 	p.tickInterval = srvInfo.TickInterval
+
+	p.eventDispatcher.Dispatch(events.TickRateInfoAvailable{
+		TickRate: p.TickRate(),
+		TickTime: p.TickTime(),
+	})
 }