refactor: Use stream composition for firing BA tasers/Narcs

This section of code specifically checks whether a BA squad has already
fired a taser or Narc at a different target.

Author: Saklad5

megamek/src/megamek/common/actions/WeaponAttackAction.java

@@ -1906,23 +1906,25 @@ private static String toHitIsImpossible(Game game, Entity ae, int attackerId, Ta
                     && (wtype.hasFlag(WeaponType.F_TASER) || wtype.getAmmoType() == AmmoType.T_NARC)) {
                 // Go through all of the current actions to see if a NARC or Taser
                 // has been fired
-                for (Enumeration<EntityAction> i = game.getActions(); i.hasMoreElements();) {
-                    Object o = i.nextElement();
-                    if (!(o instanceof WeaponAttackAction)) {
-                        continue;
+
+                // A lazy stream that evaluates to the weapon types this entity has already fired at other targets.
+                Stream<WeaponType> diffTargetWeaponTypes = game.getActionsVector().stream()
+                    .filter(WeaponAttackAction.class::isInstance)
+                    .map(WeaponAttackAction.class::cast)
+                    .filter(prevAttack ->
+                        // Is this an attack from this entity to a different target?
+                        prevAttack.getEntityId() == ae.getId() && prevAttack.getTargetId() != target.getId()
+                    )
+                    .map(prevAttack -> ae.getEquipment(prevAttack.getWeaponId()).getType());
+
+                if (wtype.hasFlag(WeaponType.F_TASER)) {
+                    if (diffTargetWeaponTypes.anyMatch(prevWtype -> prevWtype.hasFlag(WeaponType.F_TASER))) {
+                        return Messages.getString("WeaponAttackAction.BATaserSameTarget");
                     }
-                    WeaponAttackAction prevAttack = (WeaponAttackAction) o;
-                    // Is this an attack from this entity to a different target?
-                    if (prevAttack.getEntityId() == ae.getId() && prevAttack.getTargetId() != target.getId()) {
-                        Mounted prevWeapon = ae.getEquipment(prevAttack.getWeaponId());
-                        WeaponType prevWtype = (WeaponType) prevWeapon.getType();
-                        if (prevWeapon.getType().hasFlag(WeaponType.F_TASER)
-                                && weapon.getType().hasFlag(WeaponType.F_TASER)) {
-                            return Messages.getString("WeaponAttackAction.BATaserSameTarget");
-                        }
-                        if (prevWtype.getAmmoType() == AmmoType.T_NARC && wtype.getAmmoType() == AmmoType.T_NARC) {
-                            return Messages.getString("WeaponAttackAction.BANarcSameTarget");
-                        }
+                } else {
+                    assert wtype.getAmmoType() == AmmoType.T_NARC;
+                    if (diffTargetWeaponTypes.anyMatch(prevWtype -> prevWtype.getAmmoType() == AmmoType.T_NARC)) {
+                        return Messages.getString("WeaponAttackAction.BANarcSameTarget");
                     }
                 }
             }