Refactor tactical overview calculation into TacticalAnalysis class

src/main/java/funorb/shatteredplans/client/GameUI.java

@@ -3214,17 +3214,17 @@ public final class GameUI {
     this.gameSession.gameView.stopCombatAnimations();
     this.gameSession.recalculateSystemState();
     if (this.gameSession.localPlayer != null) {
-      final StatusPanelState var2 = (StatusPanelState) this.statusPanel.state;
+      final StatusPanelState statusState = (StatusPanelState) this.statusPanel.state;
-      if (var2.icon.isEmpty() && this.gameSession.placementMode != PlacementMode.BUILD_FLEET) {
+      if (statusState.icon.isEmpty() && this.gameSession.placementMode != PlacementMode.BUILD_FLEET) {
         if (this.gameSession.gameState.gameOptions.unifiedTerritories) {
           if (this.gameSession.localPlayer.combinedForce.fleetsAvailableToBuild > 0) {
             this.activateFleetPlacement(this.gameSession.localPlayer.combinedForce, true);
             return;
           }
         } else {
-          for (final ContiguousForce var3 : this.gameSession.localPlayer.contiguousForces) {
+          for (final ContiguousForce force : this.gameSession.localPlayer.contiguousForces) {
-            if (var3.fleetsAvailableToBuild > 0) {
+            if (force.fleetsAvailableToBuild > 0) {
-              this.activateFleetPlacement(var3, true);
+              this.activateFleetPlacement(force, true);
               return;
             }
           }
@@ -3233,7 +3233,7 @@ public final class GameUI {
 
       this.gameSession.endTurn();
       this.endTurnButton.activate();
-      var2.icon.setSprite(null);
+      statusState.icon.setSprite(null);
       if (this.gameSession.playersWaitingOn == 1) {
         this.setActionHint(StringConstants.TEXT_WAITING_FOR_PLAYER);
       } else {

src/main/java/funorb/shatteredplans/client/game/AbstractGameView.java

@@ -45,16 +45,13 @@ public abstract class AbstractGameView {
   public boolean isAnimatingViewport;
   public StarSystem targetedSystem;
   public MoveFleetsOrder selectedFleetOrder;
-  protected int[] possibleSystemCollapseStages;
   protected Random random;
   protected int animationTick;
   public SystemHighlight[] highlightedSystems;
   protected int[] systemDrawX;
   protected List<CombatEngagementAnimationState> combatEngagements;
   protected int[] clonedRemainingGarrisons;
-  protected boolean[] willOwnSystem;
   protected int _n;
-  protected int[] systemCollapseStages;
   private int largestFleetMovement;
   protected int largestFleetBuildQuantity;
   protected List<MoveFleetsAnimationState> fleetMovements;
@@ -66,7 +63,6 @@ public abstract class AbstractGameView {
   protected Player[] clonedSystemOwners;
   protected Collection<ProjectOrder> projectOrders;
   protected List<MoveFleetsAnimationState> combatRetreats;
-  protected boolean[] canOwnSystem;
   protected int[] systemDrawY;
   protected Player[] systemOwners;
   @MagicConstant(valuesFromClass = GameView.AnimationPhase.class)
@@ -243,16 +239,6 @@ public abstract class AbstractGameView {
     }
   }
 
-  public final void setTacticalOverlay(final boolean[] canOwnSystem,
-                                       final boolean[] willOwnSystem,
-                                       final int[] collapseStages,
-                                       final int[] possibleCollapseStages) {
-    this.possibleSystemCollapseStages = possibleCollapseStages;
-    this.systemCollapseStages = collapseStages;
-    this.canOwnSystem = canOwnSystem;
-    this.willOwnSystem = willOwnSystem;
-  }
-
   private void addBuildTannhauserEvent(final Player player, final StarSystem source, final StarSystem target) {
     final int phase = this.nextTannhauserPhase(source, target);
     this.buildEvents.add(new BuildEvent(target, player, GameState.ResourceType.EXOTICS, phase));

src/main/java/funorb/shatteredplans/client/game/ClientGameSession.java

@@ -65,6 +65,7 @@ public final class ClientGameSession extends GameSession {
   private Player[] systemOwners;
   private ContiguousForce[] systemForces;
   private int[] remainingGarrisons;
+  private TacticalAnalysis tacticalAnalysis;
 
   public boolean desynced;
   public int turnNumberWhenJoined;
@@ -93,15 +94,6 @@ public final class ClientGameSession extends GameSession {
   private TickTimer recentlyPlayedBuildSfxQueue;
   private int recentlyPlayedBuildSfxCounter;
 
-  public boolean[] systemsWillOwn;
-  private boolean[] systemsCanOwn;
-  private int[] possibleCollapseStages;
-  private int[] minGarrisonsAtTurnEnd;
-  private int[] guaranteedCollapseStages;
-  private int[] maxGarrisonsAtTurnEnd;
-  private int[] safeGarrisonsToHold;
-  private int[] minGarrisonsToHold;
-
   public ClientGameSession(final boolean isMultiplayer,
                            final boolean isTutorial,
                            final int turnLengthIndex,
@@ -202,17 +194,10 @@ public final class ClientGameSession extends GameSession {
       }
     }
 
-    final int systemCount = this.gameState.map.systems.length;
-    this.systemsCanOwn = new boolean[systemCount];
-    this.systemsWillOwn = new boolean[systemCount];
-    this.guaranteedCollapseStages = new int[systemCount];
-    this.possibleCollapseStages = new int[systemCount];
-    this.minGarrisonsAtTurnEnd = new int[systemCount];
-    this.safeGarrisonsToHold = new int[systemCount];
-    this.maxGarrisonsAtTurnEnd = new int[systemCount];
-    this.minGarrisonsToHold = new int[systemCount];
     this.gameState.recalculatePlayerFleetProduction();
-    this.gameView.setTacticalOverlay(this.systemsCanOwn, this.systemsWillOwn, this.guaranteedCollapseStages, this.possibleCollapseStages);
+
+    this.tacticalAnalysis = new TacticalAnalysis(this.gameState.map.systems.length);
+    this.gameView.setTacticalAnalysis(this.tacticalAnalysis);
 
     if (this.localPlayerIndex < 0) {
       isAutoPlaying = false;
@@ -300,115 +285,12 @@ public final class ClientGameSession extends GameSession {
     ShatteredPlansClient.saveProfile();
   }
 
-  /**
+  private void recalculateTacticalAnalysis() {
-   * Recalculates the “hatching” overlay used to display which systems are
+    this.tacticalAnalysis.analyze(this.gameState, this.localPlayer);
-   * expected or in danger of being captured or lost.
-   */
-  private void recalculateTacticalOverlay() {
-    for (final StarSystem system : this.gameState.map.systems) {
-      this.guaranteedCollapseStages[system.index] = 0;
-      this.possibleCollapseStages[system.index] = 0;
-      if (system.owner == this.localPlayer) {
-        this.systemsCanOwn[system.index] = true;
-        this.maxGarrisonsAtTurnEnd[system.index] = system.remainingGarrison;
-        this.systemsWillOwn[system.index] = true;
-        this.minGarrisonsAtTurnEnd[system.index] = system.remainingGarrison;
-      } else {
-        this.systemsCanOwn[system.index] = false;
-        this.maxGarrisonsAtTurnEnd[system.index] = 0;
-        this.systemsWillOwn[system.index] = false;
-        this.minGarrisonsAtTurnEnd[system.index] = 0;
   }
 
-      for (final MoveFleetsOrder incomingOrder : system.incomingOrders) {
+  public boolean isSystemOwnershipGuaranteed(final StarSystem system) {
-        if (incomingOrder.player == this.localPlayer) {
+    return this.tacticalAnalysis.isOwnershipGuaranteed(system);
-          this.maxGarrisonsAtTurnEnd[system.index] += incomingOrder.quantity;
-          this.systemsCanOwn[system.index] = true;
-          if (incomingOrder.target.owner == this.localPlayer || incomingOrder.target.garrison == 0) {
-            this.minGarrisonsAtTurnEnd[system.index] += incomingOrder.quantity;
-            this.systemsWillOwn[system.index] = true;
-          }
-        }
-      }
-
-      if (this.localPlayer != null) {
-        for (final StarSystem neighbor : system.neighbors) {
-          if (neighbor.owner != null && neighbor.owner != this.localPlayer
-              && (system.owner != this.localPlayer || !neighbor.owner.allies[this.localPlayer.index])
-              && !this.isStellarBombTarget(this.localPlayer, neighbor)) {
-            this.systemsWillOwn[system.index] = false;
-            this.minGarrisonsAtTurnEnd[system.index] = 0;
-            break;
-          }
-        }
-      }
-    }
-
-    if (this.gameState.gameOptions.noChainCollapsing) {
-      for (final StarSystem system : this.gameState.map.systems) {
-        this.minGarrisonsToHold[system.index] = 0;
-        this.safeGarrisonsToHold[system.index] = 0;
-      }
-    } else if (this.gameState.gameOptions.simpleGarrisoning) {
-      for (final StarSystem system : this.gameState.map.systems) {
-        this.minGarrisonsToHold[system.index] = 1;
-        this.safeGarrisonsToHold[system.index] = 1;
-      }
-    } else {
-      for (final StarSystem system : this.gameState.map.systems) {
-        this.minGarrisonsToHold[system.index] = (int) Arrays.stream(system.neighbors).filter(neighbor -> !this.systemsCanOwn[neighbor.index]).count();
-        this.safeGarrisonsToHold[system.index] = (int) Arrays.stream(system.neighbors).filter(neighbor -> !this.systemsWillOwn[neighbor.index]).count();
-      }
-    }
-
-    if (!this.gameState.gameOptions.noChainCollapsing) {
-      boolean goAgain = true;
-      while (goAgain) {
-        goAgain = false;
-
-        for (final StarSystem system : this.gameState.map.systems) {
-          final int index = system.index;
-          if (this.systemsCanOwn[index] && this.minGarrisonsToHold[index] > this.maxGarrisonsAtTurnEnd[index]) {
-            goAgain = true;
-            this.systemsCanOwn[index] = false;
-            final int nextStage = this.guaranteedCollapseStages[index] + 1;
-
-            for (final StarSystem neighbor : system.neighbors) {
-              if (this.gameState.gameOptions.simpleGarrisoning) {
-                this.minGarrisonsToHold[neighbor.index] = 1;
-              } else {
-                this.minGarrisonsToHold[neighbor.index]++;
-              }
-
-              if (this.guaranteedCollapseStages[neighbor.index] > nextStage || this.systemsCanOwn[neighbor.index]) {
-                this.guaranteedCollapseStages[neighbor.index] = nextStage;
-              }
-            }
-          }
-
-          if (this.systemsWillOwn[index] && this.safeGarrisonsToHold[index] > this.minGarrisonsAtTurnEnd[index]) {
-            goAgain = true;
-            this.systemsWillOwn[index] = false;
-            this.minGarrisonsAtTurnEnd[index] = 0;
-            final int nextStage = this.possibleCollapseStages[index] + 1;
-
-            for (final StarSystem neighbor : system.neighbors) {
-              if (this.gameState.gameOptions.simpleGarrisoning) {
-                this.safeGarrisonsToHold[neighbor.index] = 1;
-              } else {
-                this.safeGarrisonsToHold[neighbor.index]++;
-              }
-
-              if (nextStage < this.possibleCollapseStages[neighbor.index] || this.systemsWillOwn[neighbor.index]) {
-                this.possibleCollapseStages[neighbor.index] = nextStage;
-              }
-            }
-          }
-        }
-      }
-    }
-
-    this.gameView.setTacticalOverlay(this.systemsCanOwn, this.systemsWillOwn, this.guaranteedCollapseStages, this.possibleCollapseStages);
   }
 
   private void readTurnOrdersAndUpdate(final CipheredBuffer packet, final int len) {
@@ -427,22 +309,18 @@ public final class ClientGameSession extends GameSession {
       order.source.remainingGarrison -= order.quantity;
     }
 
-    this.recalculateTacticalOverlay();
+    this.recalculateTacticalAnalysis();
   }
 
   // only used by the tutorial
   public void setMap(final Map map) {
     this.gameState.setMap(map);
+
+    this.tacticalAnalysis = new TacticalAnalysis(map.systems.length);
+    this.recalculateTacticalAnalysis();
+
     this.gameView.setMap(map);
-    this.maxGarrisonsAtTurnEnd = new int[map.systems.length];
+    this.gameView.setTacticalAnalysis(this.tacticalAnalysis);
-    this.minGarrisonsToHold = new int[map.systems.length];
-    this.systemsCanOwn = new boolean[map.systems.length];
-    this.guaranteedCollapseStages = new int[map.systems.length];
-    this.minGarrisonsAtTurnEnd = new int[map.systems.length];
-    this.safeGarrisonsToHold = new int[map.systems.length];
-    this.systemsWillOwn = new boolean[map.systems.length];
-    this.possibleCollapseStages = new int[map.systems.length];
-    this.recalculateTacticalOverlay();
   }
 
   public void draw() {
@@ -1412,7 +1290,7 @@ public final class ClientGameSession extends GameSession {
             this.gameView.stopCombatAnimations();
             this.recalculateSystemState();
             this.handleBuildProject(GameState.ResourceType.ENERGY, target);
-            this.recalculateTacticalOverlay();
+            this.recalculateTacticalAnalysis();
             this.ui.setPlacementMode(PlacementMode.NONE);
             this.ui.markProjectPending(GameState.ResourceType.ENERGY);
           }
@@ -1481,7 +1359,7 @@ public final class ClientGameSession extends GameSession {
     this.gameState.projectOrders.remove(order);
     this.ui.handleProjectOrderCanceled(order.type);
     if (order.type == GameState.ResourceType.ENERGY) {
-      this.recalculateTacticalOverlay();
+      this.recalculateTacticalAnalysis();
     }
   }
 
@@ -1534,7 +1412,7 @@ public final class ClientGameSession extends GameSession {
       this.cancelOrdersToAttackPlayer(offerer);
     }
 
-    this.recalculateTacticalOverlay();
+    this.recalculateTacticalAnalysis();
     super.handlePactAccepted(offerer, offeree);
   }
 
@@ -1590,15 +1468,6 @@ public final class ClientGameSession extends GameSession {
 
     for (final StarSystem system : this.gameState.map.systems) {
       system.remainingGarrison = system.garrison;
-      if (system.owner == this.localPlayer) {
-        this.maxGarrisonsAtTurnEnd[system.index] = system.garrison;
-        this.minGarrisonsAtTurnEnd[system.index] = system.garrison;
-      } else {
-        this.systemsCanOwn[system.index] = false;
-        this.systemsWillOwn[system.index] = false;
-        this.maxGarrisonsAtTurnEnd[system.index] = 0;
-        this.minGarrisonsAtTurnEnd[system.index] = 0;
-      }
     }
 
     if (this.systemOwners == null || this.systemOwners.length < this.gameState.map.systems.length) {
@@ -1615,13 +1484,12 @@ public final class ClientGameSession extends GameSession {
     }
 
     this.gameView.assignSystemState(this.remainingGarrisons, this.systemForces, this.systemOwners, false);
-    this.gameView.setTacticalOverlay(this.systemsCanOwn, this.systemsWillOwn, this.guaranteedCollapseStages, this.possibleCollapseStages);
+    this.recalculateTacticalAnalysis();
-    this.recalculateTacticalOverlay();
     if (this.isMultiplayer || this.ais[this.localPlayerIndex] == null) {
       if (isAutoPlaying && !this.desynced && this.localPlayerIsAlive) {
         this.ais[this.localPlayerIndex].makeDesiredPactOffers();
         this.ais[this.localPlayerIndex].planTurnOrders();
-        this.recalculateTacticalOverlay();
+        this.recalculateTacticalAnalysis();
 
         this.unsentMoveOrders.addAll(this.gameState.moveOrders);
         this.unsentBuildOrders.addAll(this.gameState.buildOrders);
@@ -1650,16 +1518,11 @@ public final class ClientGameSession extends GameSession {
         JagexApplet.clientError(var6, "AI has errored in single player game");
       }
 
-      this.recalculateTacticalOverlay();
+      this.recalculateTacticalAnalysis();
       this.advanceTurnSinglePlayer();
     }
   }
 
-  private boolean isStellarBombTarget(final Player player, final StarSystem system) {
-    return this.gameState.projectOrders.stream().anyMatch(order ->
-        order.player == player && order.type == GameState.ResourceType.ENERGY && order.target == system);
-  }
-
   private void resendAllTurnOrders() {
     C2SPacket.Type.ALL_TURN_ORDERS.write(C2SPacket.buffer);
     C2SPacket.buffer.withLengthShort(() -> {
@@ -1681,7 +1544,7 @@ public final class ClientGameSession extends GameSession {
     orders.projectOrders.forEach(this::addOrder);
     orders.buildOrders.forEach(this::addOrder);
     orders.moveOrders.forEach(this::addOrder);
-    this.recalculateTacticalOverlay();
+    this.recalculateTacticalAnalysis();
     this.ui.updateAvailableFleetCounters();
   }
 
@@ -1707,8 +1570,6 @@ public final class ClientGameSession extends GameSession {
 
     order.system.remainingGarrison += order.quantity;
     this.remainingGarrisons[order.system.index] += order.quantity;
-    this.maxGarrisonsAtTurnEnd[order.system.index] += order.quantity;
-    this.minGarrisonsAtTurnEnd[order.system.index] += order.quantity;
     force.fleetsAvailableToBuild -= order.quantity;
   }
 
@@ -1762,7 +1623,7 @@ public final class ClientGameSession extends GameSession {
         this.gameState.moveOrders.remove(order);
       }
 
-      this.recalculateTacticalOverlay();
+      this.recalculateTacticalAnalysis();
       if (this.isMultiplayer) {
         this.unsentMoveOrders.remove(order);
         this.unsentMoveOrders.add(order);
@@ -1819,12 +1680,12 @@ public final class ClientGameSession extends GameSession {
         this.gameView.highlightedSystems[system.index] = SystemHighlight.GRAY;
       }
     }
-    this.recalculateTacticalOverlay();
+    this.recalculateTacticalAnalysis();
   }
 
   private void handleMoveFleets(final StarSystem source, final StarSystem target, final int quantity) {
     this.addOrder(new MoveFleetsOrder(source, target, quantity));
-    this.recalculateTacticalOverlay();
+    this.recalculateTacticalAnalysis();
   }
 
   private void handleBuildProject(@MagicConstant(valuesFromClass = GameState.ResourceType.class) final int type, final StarSystem target) {

src/main/java/funorb/shatteredplans/client/game/GameView.java

@@ -74,6 +74,7 @@ public final class GameView extends AbstractGameView {
   public boolean _Gb;
   public boolean _Ab;
   public MoveFleetsOrder _rb;
+  protected TacticalAnalysis tacticalAnalysis;
   private Sprite[] _Mb;
   private ArgbSprite _K;
   private double _wb;
@@ -3055,9 +3056,9 @@ public final class GameView extends AbstractGameView {
       final boolean isAttacked = system.incomingOrders.stream()
           .anyMatch(order -> order.player == this.localPlayer);
       if (isAttacked && this.localPlayer != null) {
-        if (!this.canOwnSystem[system.index]) {
+        if (!this.tacticalAnalysis.isOwnershipPossible(system)) {
           drawSystemHatching(this.systemHexes[system.index], Drawing.RED, 96);
-        } else if (this.willOwnSystem[system.index]) {
+        } else if (this.tacticalAnalysis.isOwnershipGuaranteed(system)) {
           drawSystemHatching(this.systemHexes[system.index], Drawing.GREEN, 64);
         } else {
           drawSystemHatching(this.systemHexes[system.index], Drawing.YELLOW, 64);
@@ -3079,10 +3080,10 @@ public final class GameView extends AbstractGameView {
       }
 
       if (owner == this.localPlayer && this.localPlayer != null) {
-        if (!this.canOwnSystem[system.index]) {
+        if (!this.tacticalAnalysis.isOwnershipPossible(system)) {
-          drawSystemHatching(var6, Drawing.RED, this.systemCollapseStages[system.index] == 0 ? 192 : 96);
+          drawSystemHatching(var6, Drawing.RED, this.tacticalAnalysis.getEarliestGuaranteedCollapseWave(system) == 0 ? 192 : 96);
-        } else if (!this.willOwnSystem[system.index]) {
+        } else if (!this.tacticalAnalysis.isOwnershipGuaranteed(system)) {
-          drawSystemHatching(var6, Drawing.YELLOW, this.possibleSystemCollapseStages[system.index] == 0 ? 128 : 64);
+          drawSystemHatching(var6, Drawing.YELLOW, this.tacticalAnalysis.getEarliestPossibleCollapseWave(system) == 0 ? 128 : 64);
         }
       }
     }
@@ -3701,4 +3702,8 @@ public final class GameView extends AbstractGameView {
       }
     }
   }
+
+  public final void setTacticalAnalysis(final TacticalAnalysis tacticalAnalysis) {
+    this.tacticalAnalysis = tacticalAnalysis;
+  }
 }

src/main/java/funorb/shatteredplans/client/game/TacticalAnalysis.java

@@ -0,0 +1,218 @@
+package funorb.shatteredplans.client.game;
+
+import funorb.shatteredplans.game.GameState;
+import funorb.shatteredplans.game.MoveFleetsOrder;
+import funorb.shatteredplans.game.Player;
+import funorb.shatteredplans.map.StarSystem;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+
+/**
+ * This class performs some simple analyses of the current map from the
+ * perspective of the local player. The resulting information is used to drive
+ * the “tactical overlay” in the user interface, which renders the information
+ * using cross-hatching of various colors.
+ */
+public final class TacticalAnalysis {
+  /**
+   * {@code true} for systems owned by the local player that could be attacked
+   * by a hostile force on this turn (and therefore could be lost regardless of
+   * its garrison at the start of combat on this turn).
+   */
+  private final boolean[] systemThreatened;
+
+  /**
+   * {@code true} for systems that the local player is <i>guaranteed</i> to own
+   * after this turn. Implies {@link #systemCanOwn}.
+   */
+  private final boolean[] systemWillOwn;
+
+  /**
+   * {@code true} for systems that the local play <i>may</i> own after this
+   * turn. Implied by {@link #systemWillOwn}.
+   */
+  private final boolean[] systemCanOwn;
+
+  /**
+   * The minimum number of fleets (owned by the local player) that could be
+   * garrisoned in each system after this turn, assuming the worst possible
+   * combat outcomes.
+   */
+  private final int[] minGarrisonAtTurnEnd;
+
+  /**
+   * The maximum number of fleets (owned by the local player) that could be
+   * garrisoned in each system after this turn, assuming the best possible
+   * combat outcomes.
+   */
+  private final int[] maxGarrisonAtTurnEnd;
+
+  /**
+   * The absolute minimum number of fleets needed to be garrisoned in each
+   * system at the end of this turn to have any chance of holding it, assuming
+   * the best possible combat outcomes in neighboring systems.
+   */
+  private final int[] minGarrisonToHold;
+
+  /**
+   * The minimum number of fleets needed to be garrisoned in each system at the
+   * end of this turn to <i>guarantee</i> it will be held, assuming the worst
+   * possible combat outcomes in neighboring systems.
+   */
+  private final int[] safeGarrisonToHold;
+
+  /**
+   * Tracks the index of the earliest “wave” in which each system <i>might</i>
+   * collapse. For systems that cannot be lost (see {@link #systemWillOwn}),
+   * the value is arbitrary.
+   */
+  private final int[] possibleCollapseWave;
+
+  /**
+   * Tracks the index of the earliest “wave” in which each system is
+   * <i>guaranteed</i> to collapse. For systems that might not be lost (see
+   * {@link #systemCanOwn}), the value is arbitrary.
+   */
+  private final int[] guaranteedCollapseWave;
+
+  public TacticalAnalysis(final int systemCount) {
+    this.systemThreatened = new boolean[systemCount];
+    this.systemCanOwn = new boolean[systemCount];
+    this.systemWillOwn = new boolean[systemCount];
+    this.guaranteedCollapseWave = new int[systemCount];
+    this.possibleCollapseWave = new int[systemCount];
+    this.minGarrisonAtTurnEnd = new int[systemCount];
+    this.safeGarrisonToHold = new int[systemCount];
+    this.maxGarrisonAtTurnEnd = new int[systemCount];
+    this.minGarrisonToHold = new int[systemCount];
+  }
+
+  public boolean isThreatened(final @NotNull StarSystem system) {
+    return this.systemThreatened[system.index];
+  }
+
+  public boolean isOwnershipGuaranteed(final @NotNull StarSystem system) {
+    return this.systemWillOwn[system.index];
+  }
+
+  public boolean isOwnershipPossible(final @NotNull StarSystem system) {
+    return this.systemCanOwn[system.index];
+  }
+
+  public int getEarliestPossibleCollapseWave(final @NotNull StarSystem system) {
+    return this.possibleCollapseWave[system.index];
+  }
+
+  public int getEarliestGuaranteedCollapseWave(final @NotNull StarSystem system) {
+    return this.guaranteedCollapseWave[system.index];
+  }
+
+  public void analyze(final @NotNull GameState gameState, final @Nullable Player localPlayer) {
+    for (final StarSystem system : gameState.map.systems) {
+      this.systemThreatened[system.index] = false;
+      this.guaranteedCollapseWave[system.index] = 0;
+      this.possibleCollapseWave[system.index] = 0;
+      if (system.owner == localPlayer) {
+        this.systemCanOwn[system.index] = true;
+        this.maxGarrisonAtTurnEnd[system.index] = system.remainingGarrison;
+        this.systemWillOwn[system.index] = true;
+        this.minGarrisonAtTurnEnd[system.index] = system.remainingGarrison;
+      } else {
+        this.systemCanOwn[system.index] = false;
+        this.maxGarrisonAtTurnEnd[system.index] = 0;
+        this.systemWillOwn[system.index] = false;
+        this.minGarrisonAtTurnEnd[system.index] = 0;
+      }
+
+      for (final MoveFleetsOrder incomingOrder : system.incomingOrders) {
+        if (incomingOrder.player == localPlayer) {
+          this.maxGarrisonAtTurnEnd[system.index] += incomingOrder.quantity;
+          this.systemCanOwn[system.index] = true;
+          if (incomingOrder.target.owner == localPlayer || incomingOrder.target.garrison == 0) {
+            this.minGarrisonAtTurnEnd[system.index] += incomingOrder.quantity;
+            this.systemWillOwn[system.index] = true;
+          }
+        }
+      }
+
+      if (localPlayer != null) {
+        for (final StarSystem neighbor : system.neighbors) {
+          if (neighbor.owner != null && neighbor.owner != localPlayer
+              && (system.owner != localPlayer || !neighbor.owner.allies[localPlayer.index])
+              && !gameState.isStellarBombTarget(localPlayer, neighbor)) {
+            this.systemThreatened[system.index] = true;
+            this.systemWillOwn[system.index] = false;
+            this.minGarrisonAtTurnEnd[system.index] = 0;
+            break;
+          }
+        }
+      }
+    }
+
+    if (gameState.gameOptions.noChainCollapsing) {
+      for (final StarSystem system : gameState.map.systems) {
+        this.minGarrisonToHold[system.index] = 0;
+        this.safeGarrisonToHold[system.index] = 0;
+      }
+    } else if (gameState.gameOptions.simpleGarrisoning) {
+      for (final StarSystem system : gameState.map.systems) {
+        this.minGarrisonToHold[system.index] = 1;
+        this.safeGarrisonToHold[system.index] = 1;
+      }
+    } else {
+      for (final StarSystem system : gameState.map.systems) {
+        this.minGarrisonToHold[system.index] = (int) Arrays.stream(system.neighbors).filter(neighbor -> !this.systemCanOwn[neighbor.index]).count();
+        this.safeGarrisonToHold[system.index] = (int) Arrays.stream(system.neighbors).filter(neighbor -> !this.systemWillOwn[neighbor.index]).count();
+      }
+    }
+
+    if (!gameState.gameOptions.noChainCollapsing) {
+      boolean goAgain = true;
+      while (goAgain) {
+        goAgain = false;
+
+        for (final StarSystem system : gameState.map.systems) {
+          final int index = system.index;
+          if (this.systemCanOwn[index] && this.minGarrisonToHold[index] > this.maxGarrisonAtTurnEnd[index]) {
+            goAgain = true;
+            this.systemCanOwn[index] = false;
+            final int nextStage = this.guaranteedCollapseWave[index] + 1;
+
+            for (final StarSystem neighbor : system.neighbors) {
+              if (gameState.gameOptions.simpleGarrisoning) {
+                this.minGarrisonToHold[neighbor.index] = 1;
+              } else {
+                this.minGarrisonToHold[neighbor.index]++;
+              }
+
+              if (this.guaranteedCollapseWave[neighbor.index] > nextStage || this.systemCanOwn[neighbor.index]) {
+                this.guaranteedCollapseWave[neighbor.index] = nextStage;
+              }
+            }
+          }
+
+          if (this.systemWillOwn[index] && this.safeGarrisonToHold[index] > this.minGarrisonAtTurnEnd[index]) {
+            goAgain = true;
+            this.systemWillOwn[index] = false;
+            this.minGarrisonAtTurnEnd[index] = 0;
+            final int nextStage = this.possibleCollapseWave[index] + 1;
+
+            for (final StarSystem neighbor : system.neighbors) {
+              if (gameState.gameOptions.simpleGarrisoning) {
+                this.safeGarrisonToHold[neighbor.index] = 1;
+              } else {
+                this.safeGarrisonToHold[neighbor.index]++;
+              }
+
+              if (nextStage < this.possibleCollapseWave[neighbor.index] || this.systemWillOwn[neighbor.index]) {
+                this.possibleCollapseWave[neighbor.index] = nextStage;
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}

src/main/java/funorb/shatteredplans/client/game/TutorialState.java

@@ -262,7 +262,7 @@ public final class TutorialState {
 
         for (var3 = 0; var2.length > var3; ++var3) {
           var4 = var2[var3];
-          if (var4.owner == localPlayer && !session.systemsWillOwn[var4.index]) {
+          if (var4.owner == localPlayer && !session.isSystemOwnershipGuaranteed(var4)) {
             session.gameView.a021(92, var4, 300.0F);
             return;
           }

src/main/java/funorb/shatteredplans/game/GameState.java

@@ -1333,6 +1333,11 @@ public final class GameState {
     return kills;
   }
 
+  public boolean isStellarBombTarget(final Player player, final StarSystem system) {
+    return this.projectOrders.stream().anyMatch(order ->
+        order.player == player && order.type == ResourceType.ENERGY && order.target == system);
+  }
+
   public void recalculateFleetProduction() {
     for (final Player player : this.players) {
       this.recalculateFleetProduction(player);