From ce44ba26aadb0e3b2d2f6d36fbfcc35abb4dcef7 Mon Sep 17 00:00:00 2001
From: theelk801 <theelk801@gmail.com>
Date: Fri, 28 Apr 2023 18:22:39 -0400
Subject: [PATCH] [J22] Implement Goblin Researcher

---
 .../src/mage/cards/g/GoblinResearcher.java    | 122 ++++++++++++++++++
 Mage.Sets/src/mage/sets/Jumpstart2022.java    |   1 +
 2 files changed, 123 insertions(+)
 create mode 100644 Mage.Sets/src/mage/cards/g/GoblinResearcher.java

diff --git a/Mage.Sets/src/mage/cards/g/GoblinResearcher.java b/Mage.Sets/src/mage/cards/g/GoblinResearcher.java
new file mode 100644
index 0000000000..6bdd7581b2
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/g/GoblinResearcher.java
@@ -0,0 +1,122 @@
+package mage.cards.g;
+
+import mage.MageInt;
+import mage.MageObjectReference;
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.condition.Condition;
+import mage.abilities.effects.OneShotEffect;
+import mage.cards.Card;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.players.Player;
+import mage.util.CardUtil;
+import mage.watchers.Watcher;
+
+import java.util.*;
+
+/**
+ * @author TheElk801
+ */
+public final class GoblinResearcher extends CardImpl {
+
+    public GoblinResearcher(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{3}{R}");
+
+        this.subtype.add(SubType.GOBLIN);
+        this.subtype.add(SubType.WIZARD);
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(3);
+
+        // When Goblin Researcher enters the battlefield, exile the top card of your library. During any turn you attacked with Goblin Researcher, you may play that card.
+        this.addAbility(new EntersBattlefieldTriggeredAbility(new GoblinResearcherEffect()), new GoblinResearcherWatcher());
+    }
+
+    private GoblinResearcher(final GoblinResearcher card) {
+        super(card);
+    }
+
+    @Override
+    public GoblinResearcher copy() {
+        return new GoblinResearcher(this);
+    }
+}
+
+class GoblinResearcherEffect extends OneShotEffect {
+
+    GoblinResearcherEffect() {
+        super(Outcome.Benefit);
+        staticText = "exile the top card of your library. " +
+                "During any turn you attacked with {this}, you may play that card";
+    }
+
+    private GoblinResearcherEffect(final GoblinResearcherEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public GoblinResearcherEffect copy() {
+        return new GoblinResearcherEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return false;
+        }
+        Card card = player.getLibrary().getFromTop(game);
+        if (card == null) {
+            return false;
+        }
+        player.moveCards(card, Zone.EXILED, source, game);
+        CardUtil.makeCardPlayable(
+                game, source, card, Duration.Custom, false,
+                source.getControllerId(), GoblinResearcherCondition.instance
+        );
+        return true;
+    }
+}
+
+enum GoblinResearcherCondition implements Condition {
+    instance;
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return false;
+    }
+}
+
+class GoblinResearcherWatcher extends Watcher {
+
+    private final Map<MageObjectReference, Set<UUID>> map = new HashMap<>();
+
+    GoblinResearcherWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.ATTACKER_DECLARED) {
+            return;
+        }
+        map.computeIfAbsent(new MageObjectReference(event.getSourceId(), game), x -> new HashSet<>()).add(event.getPlayerId());
+    }
+
+    @Override
+    public void reset() {
+        super.reset();
+        map.clear();
+    }
+
+    static boolean checkPlayer(Ability source, Game game) {
+        game.getState()
+                .getWatcher(GoblinResearcherWatcher.class)
+                .map
+                .getOrDefault(new MageObjectReference(source, 0), Collections.emptySet())
+                .contains(source.getControllerId());
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/Jumpstart2022.java b/Mage.Sets/src/mage/sets/Jumpstart2022.java
index 6c273777a6..b052a48e79 100644
--- a/Mage.Sets/src/mage/sets/Jumpstart2022.java
+++ b/Mage.Sets/src/mage/sets/Jumpstart2022.java
@@ -319,6 +319,7 @@ public final class Jumpstart2022 extends ExpansionSet {
         cards.add(new SetCardInfo("Goblin Psychopath", 544, Rarity.UNCOMMON, mage.cards.g.GoblinPsychopath.class));
         cards.add(new SetCardInfo("Goblin Rabblemaster", 545, Rarity.RARE, mage.cards.g.GoblinRabblemaster.class));
         cards.add(new SetCardInfo("Goblin Rally", 546, Rarity.UNCOMMON, mage.cards.g.GoblinRally.class));
+        cards.add(new SetCardInfo("Goblin Researcher", 34, Rarity.COMMON, mage.cards.g.GoblinResearcher.class));
         cards.add(new SetCardInfo("Goblin Trailblazer", 547, Rarity.COMMON, mage.cards.g.GoblinTrailblazer.class));
         cards.add(new SetCardInfo("Goblin Warchief", 548, Rarity.UNCOMMON, mage.cards.g.GoblinWarchief.class));
         cards.add(new SetCardInfo("Goldhound", 549, Rarity.COMMON, mage.cards.g.Goldhound.class));