Fix empty validLocations set failing to be decoded (#1197)

* Fix empty `validLocations` set failing to be decoded

* Remove unnecessary override

* Add encode tests

---------

Co-authored-by: Kevinthegreat <92656833+kevinthegreat1@users.noreply.github.com>

4 files changed, 29 insertions, 8 deletions

diff --git a/src/main/java/de/hysky/skyblocker/skyblock/chat/ChatRulesConfigScreen.java b/src/main/java/de/hysky/skyblocker/skyblock/chat/ChatRulesConfigScreen.java
index d986f9c7..b4e7334a 100644
--- a/src/main/java/de/hysky/skyblocker/skyblock/chat/ChatRulesConfigScreen.java
+++ b/src/main/java/de/hysky/skyblocker/skyblock/chat/ChatRulesConfigScreen.java
@@ -20,11 +20,6 @@ public class ChatRulesConfigScreen extends Screen {
     }
 
     @Override
-    public void setTooltip(Text tooltip) {
-        super.setTooltip(tooltip);
-    }
-
-    @Override
     protected void init() {
         super.init();
         chatRulesConfigListWidget = new ChatRulesConfigListWidget(client, this, width, height - 96, 32, 25);
diff --git a/src/main/java/de/hysky/skyblocker/utils/CodecUtils.java b/src/main/java/de/hysky/skyblocker/utils/CodecUtils.java
index 5b17dfa4..649f2dc4 100644
--- a/src/main/java/de/hysky/skyblocker/utils/CodecUtils.java
+++ b/src/main/java/de/hysky/skyblocker/utils/CodecUtils.java
@@ -44,7 +44,9 @@ public final class CodecUtils {
 	 * @param <E> The enum type
 	 * @return EnumSet codec for the given enum
 	 */
-	public static <E extends Enum<E>> Codec<EnumSet<E>> enumSetCodec(Codec<E> enumCodec) {
-		return enumCodec.listOf().xmap(EnumSet::copyOf, List::copyOf);
+	public static <E extends Enum<E>> Codec<EnumSet<E>> enumSetCodec(Codec<E> enumCodec, Class<E> enumClass) {
+		// EnumSet#copyOf finds type from the first element of the list passed to it, so if it's empty the enum type is unknown and an exception is thrown
+		// So we have to manually handle the case where the list empty
+		return enumCodec.listOf().xmap(list -> list.isEmpty() ? EnumSet.noneOf(enumClass) : EnumSet.copyOf(list), List::copyOf);
 	}
 }
diff --git a/src/main/java/de/hysky/skyblocker/utils/Location.java b/src/main/java/de/hysky/skyblocker/utils/Location.java
index 4c3aa6f4..b43783ab 100644
--- a/src/main/java/de/hysky/skyblocker/utils/Location.java
+++ b/src/main/java/de/hysky/skyblocker/utils/Location.java
@@ -47,7 +47,7 @@ public enum Location implements StringIdentifiable {
 	UNKNOWN("unknown");
 
 	public static final Codec<Location> CODEC = StringIdentifiable.createCodec(Location::values);
-	public static final Codec<EnumSet<Location>> SET_CODEC = CodecUtils.enumSetCodec(CODEC);
+	public static final Codec<EnumSet<Location>> SET_CODEC = CodecUtils.enumSetCodec(CODEC, Location.class);
 
 	/**
 	 * location id from <a href="https://api.hypixel.net/v2/resources/games">Hypixel API</a>
diff --git a/src/test/java/de/hysky/skyblocker/skyblock/chat/ChatRuleTest.java b/src/test/java/de/hysky/skyblocker/skyblock/chat/ChatRuleTest.java
index 1c5004fc..21831918 100644
--- a/src/test/java/de/hysky/skyblocker/skyblock/chat/ChatRuleTest.java
+++ b/src/test/java/de/hysky/skyblocker/skyblock/chat/ChatRuleTest.java
@@ -70,4 +70,28 @@ class ChatRuleTest {
 				)).getOrThrow()
 		);
 	}
+
+	@Test
+	void codecParseEmptySet() {
+		Assertions.assertEquals(
+				EnumSet.noneOf(Location.class),
+				ChatRule.LOCATION_FIXING_CODEC.parse(JsonOps.INSTANCE, JsonOps.INSTANCE.createList(Stream.empty())).getOrThrow()
+		);
+	}
+
+	@Test
+	void codecEncode() {
+		Assertions.assertEquals(
+				JsonOps.INSTANCE.createList(Stream.empty()),
+				ChatRule.LOCATION_FIXING_CODEC.encodeStart(JsonOps.INSTANCE, EnumSet.noneOf(Location.class)).getOrThrow()
+		);
+
+		Assertions.assertEquals(
+				JsonOps.INSTANCE.createList(Stream.of(Location.DWARVEN_MINES, Location.WINTER_ISLAND)
+						.map(Location::asString)
+						.map(JsonOps.INSTANCE::createString)
+				),
+				ChatRule.LOCATION_FIXING_CODEC.encodeStart(JsonOps.INSTANCE, EnumSet.of(Location.DWARVEN_MINES, Location.WINTER_ISLAND)).getOrThrow()
+		);
+	}
 }