add IsForetold trigger

forge-game/src/main/java/forge/game/card/CardFactoryUtil.java

@@ -26,6 +26,7 @@ import java.util.Map.Entry;
 import java.util.Set;
 
 import forge.game.event.GameEventCardForetold;
+import forge.game.trigger.TriggerType;
 import org.apache.commons.lang3.StringUtils;
 
 import com.google.common.base.Predicate;
@@ -2892,6 +2893,7 @@ public class CardFactoryUtil {
                     final Game game = getHostCard().getGame();
                     final Card c = game.getAction().exile(getHostCard(), this);
                     c.setForetold(true);
+                    game.getTriggerHandler().runTrigger(TriggerType.IsForetold, AbilityKey.mapFromCard(c), false);
                     c.setForetoldThisTurn(true);
                     c.turnFaceDown(true);
                     // look at the exiled card

forge-game/src/main/java/forge/game/trigger/TriggerIsForetold.java

@@ -0,0 +1,74 @@
+/*
+ * Forge: Play Magic: the Gathering.
+ * Copyright (C) 2021  Forge Team
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package forge.game.trigger;
+
+import java.util.Map;
+
+import forge.game.ability.AbilityKey;
+import forge.game.card.Card;
+import forge.game.card.CardState;
+import forge.game.spellability.SpellAbility;
+import forge.util.Localizer;
+
+/**
+ * <p>
+ * Trigger_IsForetold class.
+ * </p>
+ * (Mainly copied from TriggerBecomeMonstrous)
+ */
+public class TriggerIsForetold extends Trigger {
+
+    /**
+     * <p>
+     * Constructor for Trigger_IsForetold.
+     * </p>
+     *
+     * @param params
+     *            a {@link java.util.HashMap} object.
+     * @param host
+     *            a {@link forge.game.card.Card} object.
+     * @param intrinsic
+     *            the intrinsic
+     */
+    public TriggerIsForetold(Map<String, String> params, final Card host, final boolean intrinsic) {
+        super(params, host, intrinsic);
+    }
+
+    /** {@inheritDoc}
+     * @param runParams*/
+    @Override
+    public final boolean performTest(Map<AbilityKey, Object> runParams) {
+        if (!matchesValidParam("ValidCard", runParams.get(AbilityKey.Card))) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public final void setTriggeringObjects(final SpellAbility sa, Map<AbilityKey, Object> runParams) {
+        sa.setTriggeringObjectsFrom(runParams, AbilityKey.Card);
+    }
+
+    @Override
+    public String getImportantStackObjects(SpellAbility sa) {
+        //nothing here because foretelling is secretive - generally will be Static anyway
+        return "";
+    }
+}

forge-game/src/main/java/forge/game/trigger/TriggerType.java

@@ -73,6 +73,7 @@ public enum TriggerType {
     Foretell(TriggerForetell.class),
     Immediate(TriggerImmediate.class),
     Investigated(TriggerInvestigated.class),
+    IsForetold(TriggerIsForetold.class),
     LandPlayed(TriggerLandPlayed.class),
     LifeGained(TriggerLifeGained.class),
     LifeLost(TriggerLifeLost.class),