Use file exists for do callout (#397)

* use fileExists and searching commonly used file extensions in doCallout

* Fix files not being searched correctly

prevent deeper search for files when they already have a file ending

* Lazy Eval condition

* fix edge case where invalid files where put into doCallout cache

addons/main/functions/fnc_doCallout.sqf

@@ -20,7 +20,6 @@
 
 if (GVAR(disableAICallouts)) exitWith {};
 
-scopeName QGVAR(doCallout_main);
 params [
  ["_unit", objNull, [objNull]],
  ["_behavior", "", [""]],
@@ -74,15 +73,33 @@ if (isNil "_cachedSounds") then {
  _cachedSounds = getArray (_protocolConfig >> _callout);
  private _deleted = false;
  {
- private _sound = _x;
+ private _sound = toLowerANSI _x;
  if (_sound == "") then {
- _sound = objNull;
  _deleted = true;
- } else {
- if (_sound select [0, 1] != "\") then {
- _sound = (getArray (configFile >> "CfgVoice" >> _speaker >> "directories") select 0) + _sound;
- };
+ _cachedSounds set [_forEachIndex, objNull];
+ continue;
  };
+
+ private _hasFileEnding = _sound regexMatch ".+?\.(?:ogg|wss|wav|mp3)$/io";
+
+ if (_sound select [0, 1] != "\") then {
+ _sound = (getArray (configFile >> "CfgVoice" >> _speaker >> "directories") select 0) + _sound;
+ };
+
+ if (!_hasFileEnding && {!fileExists _sound}) then {
+ {
+ if (fileExists (_sound + _x)) exitWith {
+ _sound = _sound + _x;
+ };
+ } forEach [".ogg", ".wss", ".wav", ".mp3"];
+ };
+
+ if (!_hasFileEnding || {!fileExists _sound}) then {
+ _deleted = true;
+ _cachedSounds set [_forEachIndex, objNull];
+ continue;
+ };
+
  _cachedSounds set [_forEachIndex, _sound];
  } forEach _cachedSounds;