Warnings on Campaign Load

MekHQ/resources/mekhq/resources/GUI.properties

@@ -1556,4 +1556,9 @@ AutoResolveMethod.PRINCESS.toolTipText=Princess plays the game for you.
 AutoResolveMethod.ABSTRACT_COMBAT.text=Abstract Combat Auto Resolution
 AutoResolveMethod.ABSTRACT_COMBAT.toolTipText=ACAR, a fast simulation using a subset of the abstract combat system rules
 AutoResolveMethod.promptForAutoResolveMethod.text=Select the method to use for auto resolving the scenario.
-AutoResolveMethod.promptForAutoResolveMethod.title=Auto Resolve Method
+AutoResolveMethod.promptForAutoResolveMethod.title=Auto Resolve Method
+
+ActiveContractWarning.title=Active Contract Warning
+ActiveContractWarning.message="This campaign has an active contract.\
+  \n\
+  \nPlease complete the contract before updating to version %s."

MekHQ/src/mekhq/campaign/Campaign.java

@@ -1209,6 +1209,53 @@ public List<AtBContract> getAtBContracts() {
                 .collect(Collectors.toList());
     }
 
+    /**
+     * Determines whether there is an active AtB (Against the Bot) contract.
+     * This method checks if there are contracts currently active. Optionally,
+     * it can also consider future contracts that have been accepted but have
+     * not yet started.
+     *
+     * @param includeFutureContracts a boolean indicating whether contracts that
+     *                               have been accepted but have not yet started
+     *                               should also be considered as active.
+     * @return {@code true} if there is any currently active AtB contract, or if
+     *         {@code includeFutureContracts} is {@code true} and there are future
+     *         contracts starting after the current date. Otherwise, {@code false}.
+     * @see #hasFutureAtBContract()
+     */
+    public boolean hasActiveAtBContract(boolean includeFutureContracts) {
+        if (!getActiveAtBContracts().isEmpty()) {
+            return true;
+        }
+
+        if (includeFutureContracts) {
+            return hasFutureAtBContract();
+        }
+
+        return false;
+    }
+
+    /**
+     * Determines whether there are any future AtB (Against the Bot) contracts.
+     * A future contract is defined as a contract that has been accepted but
+     * has a start date later than the current day.
+     *
+     * @return true if there is at least one future AtB contract (accepted but
+     *         starting after the current date). Otherwise, false.
+     */
+    public boolean hasFutureAtBContract() {
+        List<AtBContract> contracts = getAtBContracts();
+
+        for (AtBContract contract : contracts) {
+            // This catches any contracts that have been accepted, but haven't yet started
+            if (contract.getStartDate().isAfter(currentDay)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     public List<AtBContract> getActiveAtBContracts() {
         return getActiveAtBContracts(false);
     }

MekHQ/src/mekhq/campaign/io/CampaignXmlParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2024 - The MegaMek Team. All Rights Reserved.
+ * Copyright (c) 2018-2025 - The MegaMek Team. All Rights Reserved.
  *
  * This file is part of MekHQ.
  *
@@ -29,6 +29,7 @@
 import megamek.common.icons.Camouflage;
 import megamek.common.weapons.bayweapons.BayWeapon;
 import megamek.logging.MMLogger;
+import mekhq.MHQConstants;
 import mekhq.MekHQ;
 import mekhq.NullEntityException;
 import mekhq.Utilities;
@@ -67,6 +68,7 @@
 import mekhq.campaign.universe.PlanetarySystem.PlanetarySystemEvent;
 import mekhq.campaign.universe.Systems;
 import mekhq.campaign.universe.fameAndInfamy.FameAndInfamyController;
+import mekhq.gui.dialog.ActiveContractWarning;
 import mekhq.io.idReferenceClasses.PersonIdReference;
 import mekhq.module.atb.AtBEventProcessor;
 import mekhq.utilities.MHQXMLUtility;
@@ -581,6 +583,12 @@ public Campaign parse() throws CampaignXmlParseException, NullEntityException {
                         }
                     });
 
+        if (MHQConstants.VERSION.isHigherThan(version)) {
+            if (retVal.hasActiveAtBContract(true)) {
+                new ActiveContractWarning();
+            }
+        }
+
         logger.info("Load of campaign file complete!");
 
         return retVal;

MekHQ/src/mekhq/gui/dialog/ActiveContractWarning.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2025 - The MegaMek Team. All Rights Reserved.
+ *
+ * This file is part of MekHQ.
+ *
+ * MegaMek is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * MegaMek is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MegaMek. If not, see <http://www.gnu.org/licenses/>.
+ */
+package mekhq.gui.dialog;
+
+import mekhq.MHQConstants;
+import mekhq.MekHQ;
+
+import javax.swing.*;
+import java.util.ResourceBundle;
+
+public class ActiveContractWarning {
+    private final String RESOURCE_KEY = "mekhq.resources.GUI";
+    private final transient ResourceBundle resources =
+        ResourceBundle.getBundle(RESOURCE_KEY, MekHQ.getMHQOptions().getLocale());
+
+    /**
+     * Displays a warning dialog to the user indicating that the campaign has
+     * an active contract. The warning informs the user to complete the active
+     * contract before updating to the specified version of the application.
+     * <p>
+     * The displayed message includes the current application version retrieved
+     * from {@code MHQConstants.VERSION}.
+     * <p>
+     * The dialog uses an error message icon and is displayed in a modal popup.
+     *
+     * @see JOptionPane#showMessageDialog(java.awt.Component, Object, String, int)
+     */
+    public ActiveContractWarning() {
+        String message = String.format(resources.getString("ActiveContractWarning.message"),
+            MHQConstants.VERSION);
+
+        JOptionPane.showMessageDialog(
+            null,
+            message,
+            resources.getString("ActiveContractWarning.title"),
+            JOptionPane.ERROR_MESSAGE
+        );
+    }
+}