[LCI] Implement Thousand Moons Smithy // Barracks of the Thousand

Mage/src/main/java/mage/abilities/common/CastSpellPaidBySourceTriggeredAbility.java

@@ -0,0 +1,77 @@
+package mage.abilities.common;
+
+
+import mage.MageObjectReference;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.Effect;
+import mage.constants.Zone;
+import mage.filter.FilterSpell;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.stack.Spell;
+import mage.target.targetpointer.FixedTarget;
+import mage.watchers.common.ManaPaidObjectSourceWatcher;
+
+/**
+ * @author Susucr
+ */
+public class CastSpellPaidBySourceTriggeredAbility extends TriggeredAbilityImpl {
+
+    private final FilterSpell filter;
+    private final boolean setTargetPointer;
+
+    public CastSpellPaidBySourceTriggeredAbility(Effect effect, FilterSpell filter, boolean setTargetPointer) {
+        super(Zone.BATTLEFIELD, effect);
+        setTriggerPhrase("Whenever you cast " + filter.getMessage() + " using mana produced by {this}, ");
+        addWatcher(new ManaPaidObjectSourceWatcher());
+
+        this.filter = filter;
+        this.setTargetPointer = setTargetPointer;
+    }
+
+    protected CastSpellPaidBySourceTriggeredAbility(final CastSpellPaidBySourceTriggeredAbility ability) {
+        super(ability);
+        this.filter = ability.filter;
+        this.setTargetPointer = ability.setTargetPointer;
+    }
+
+    @Override
+    public CastSpellPaidBySourceTriggeredAbility copy() {
+        return new CastSpellPaidBySourceTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.SPELL_CAST;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        if (!controllerId.equals(event.getPlayerId())) {
+            return false;
+        }
+
+        Spell spell = game.getSpell(event.getTargetId());
+        if (spell == null || !this.filter.match(spell, controllerId, this, game)) {
+            return false;
+        }
+
+        ManaPaidObjectSourceWatcher watcher = game.getState().getWatcher(ManaPaidObjectSourceWatcher.class);
+        if (watcher == null) {
+            return false;
+        }
+
+        if (!watcher.checkManaFromSourceWasUsedToPay(
+                new MageObjectReference(sourceId, game),
+                new MageObjectReference(spell.getSourceId(), game)
+        )) {
+            return false;
+        }
+
+        if (setTargetPointer) {
+            this.getAllEffects().setTargetPointer(new FixedTarget(spell.getId(), game));
+        }
+
+        return true;
+    }
+}