Handle trimming out third place match in prepared maps

app/features/tournament-bracket/core/PreparedMaps.test.ts

@@ -209,6 +209,17 @@ describe("PreparedMaps - trimPreparedEliminationMaps", () => {
 		expect(trimmed).toBe(FOUR_TEAM_SE_PREPARED);
 	});
 
+	test("returns trimmed if third place match disappeared", () => {
+		const trimmed = PreparedMaps.trimPreparedEliminationMaps({
+			preparedMaps: FOUR_TEAM_SE_PREPARED,
+			teamCount: 3,
+			bracket: tournament.bracketByIdx(0)!,
+		});
+
+		expect(trimmed?.maps.length).toBe(FOUR_TEAM_SE_PREPARED.maps.length - 1);
+		expect(trimmed?.maps.some((m) => m.groupId === 1)).toBe(false);
+	});
+
 	test("trims the maps (SE - 1 extra round)", () => {
 		const trimmed = PreparedMaps.trimPreparedEliminationMaps({
 			preparedMaps: EIGHT_TEAM_SE_PREPARED,

app/features/tournament-bracket/core/PreparedMaps.ts

@@ -101,6 +101,10 @@ export function trimPreparedEliminationMaps({
 		eliminationTeamCountOptions(teamCount)[0].max;
 
 	if (isPerfectCountMatch) {
+		if (thirdPlaceMatchDisappeared({ preparedMaps, teamCount, ...rest })) {
+			return filterOutThirdPlaceMatch(preparedMaps);
+		}
+
 		return preparedMaps;
 	}
 
@@ -160,3 +164,28 @@ function roundsWithVirtualIds<T extends { roundId: number }>(
 
 	return rounds.map((r, i) => ({ ...r, roundId: virtualIds[i] }));
 }
+
+function thirdPlaceMatchDisappeared({
+	bracket,
+	preparedMaps,
+	teamCount,
+}: TrimPreparedEliminationMapsAgs & { preparedMaps: PreparedMaps }) {
+	if (
+		bracket.type !== "single_elimination" ||
+		!bracket.settings?.thirdPlaceMatch
+	) {
+		return false;
+	}
+
+	const preparedHasThirdPlace =
+		removeDuplicates(preparedMaps.maps.map((r) => r.groupId)).length > 1;
+
+	return preparedHasThirdPlace && teamCount < 4;
+}
+
+function filterOutThirdPlaceMatch(prepared: PreparedMaps): PreparedMaps {
+	return {
+		...prepared,
+		maps: prepared.maps.filter((map) => map.groupId === 0),
+	};
+}