From c89ea44131e4d209e3827f44e5d8d98f958199c0 Mon Sep 17 00:00:00 2001
From: daveluff <daveluff>
Date: Mon, 6 Oct 2003 22:40:37 +0000
Subject: [PATCH] Further progress towards AI/ATC dialog

---
 src/ATC/AIPlane.cxx |  2 +-
 src/ATC/ATC.cxx     | 18 ++++++++++++++++++
 src/ATC/ATC.hxx     | 23 +++++++++++++++++------
 src/ATC/tower.cxx   |  3 +++
 4 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/src/ATC/AIPlane.cxx b/src/ATC/AIPlane.cxx
index 5ce556b47..bfb83a0e9 100644
--- a/src/ATC/AIPlane.cxx
+++ b/src/ATC/AIPlane.cxx
@@ -52,7 +52,7 @@ FGAIPlane::~FGAIPlane() {
 void FGAIPlane::Update(double dt) {
 	if(_pending) {
 		if(tuned_station) {
-			if(tuned_station->FreqClear()) {
+			if(tuned_station->GetFreqClear()) {
 				_pending = false;
 				_transmit = true;
 				_transmitting = false;
diff --git a/src/ATC/ATC.cxx b/src/ATC/ATC.cxx
index 120c00e98..4ea5e10f4 100644
--- a/src/ATC/ATC.cxx
+++ b/src/ATC/ATC.cxx
@@ -36,7 +36,25 @@ FGATC::FGATC() {
 FGATC::~FGATC() {
 }
 
+// Derived classes wishing to use the response counter should call this from their own Update(...).
 void FGATC::Update(double dt) {
+	if(responseReqd) {
+		if(responseCounter >= responseTime) {
+			responseReqd = false;
+			respond = true;
+		} else {
+			responseCounter += dt;
+		}
+	}
+}
+
+void FGATC::SetResponseReqd(string rid) {
+	responseReqd = true;
+	respond = false;	// TODO - this ignores the fact that more than one plane could call this before response
+						// Shouldn't happen with AI only, but user could confuse things??
+	responseID = rid;
+	responseCounter = 0.0;
+	responseTime = 2.5;		// TODO - randomize this slightly.
 }
 
 void FGATC::AddPlane(string pid) {
diff --git a/src/ATC/ATC.hxx b/src/ATC/ATC.hxx
index 1249e6e1f..1401cdd1a 100644
--- a/src/ATC/ATC.hxx
+++ b/src/ATC/ATC.hxx
@@ -99,13 +99,15 @@ ostream& operator << (ostream& os, atc_type atc);
 
 class FGATC {
 	
-	public:
+public:
 	
 	FGATC();
 	virtual ~FGATC();
 	
 	// Run the internal calculations
-	virtual void Update(double dt);
+	// Derived classes should call this method from their own Update methods if they 
+	// wish to use the response timer functionality.
+	void Update(double dt);
 	
 	// Add plane to a stack
 	virtual void AddPlane(string pid);
@@ -120,10 +122,12 @@ class FGATC {
 	virtual void SetNoDisplay();
 	
 	// Returns true if OK to transmit on this frequency
-	inline bool FreqClear() { return freqClear; }
+	inline bool GetFreqClear() { return freqClear; }
 	// Indicate that the frequency is in use
-	inline void FreqInUse() { freqClear = false; }
-	// Under development!!
+	inline void SetFreqInUse() { freqClear = false; }
+	// Transmission to the ATC is finished and a response is required
+	void SetResponseReqd(string rid);
+	// The above 3 funcs under development!!
 	// The idea is that AI traffic or the user ATC dialog box calls FreqInUse() when they begin transmitting,
 	// and that the tower control sets freqClear back to true following a reply.
 	// AI traffic should check FreqClear() is true prior to transmitting.
@@ -156,7 +160,7 @@ class FGATC {
 	inline const char* get_name() {return name.c_str();}
 	inline void set_name(const string nm) {name = nm;}
 	
-	protected:
+protected:
 	
 	// Render a transmission
 	// Outputs the transmission either on screen or as audio depending on user preference
@@ -182,6 +186,13 @@ class FGATC {
 	FGATCVoice* vPtr;
 	
 	bool freqClear;		// Flag to indicate if the frequency is clear of ongoing dialog
+	bool responseReqd;	// Flag to indicate we should be responding to a request/report 
+	double responseTime;	// Time to take from end of request transmission to beginning of response
+							// The idea is that this will be slightly random.
+	double responseCounter;		// counter to implement the above
+	string responseID;	// ID of the plane to respond to
+	bool respond;	// Flag to indicate now is the time to respond - ie set following the count down of the response timer.
+	// Derived classes only need monitor this flag, and use the response ID, as long as they call FGATC::Update(...)
 };
 
 inline istream&
diff --git a/src/ATC/tower.cxx b/src/ATC/tower.cxx
index dee428491..689a8e92d 100644
--- a/src/ATC/tower.cxx
+++ b/src/ATC/tower.cxx
@@ -736,6 +736,9 @@ void FGTower::Update(double dt) {
 	if(update_count >= update_count_max) {
 		update_count = 0;
 	}
+	
+	// Call the base class update for the response time handling.
+	FGATC::Update(dt);
 
 	if(ident == "KEMT") {	
 		// For AI debugging convienience - may be removed