initial commit

fluxer_api/src/utils/BucketUtils.ts

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+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {FLUXER_EPOCH} from '~/Constants';
+
+const BUCKET_SIZE = BigInt(1000 * 60 * 60 * 24 * 10);
+
+export const makeBucket = (snowflake: bigint | null): number => {
+	let timestamp: bigint;
+	if (snowflake == null) {
+		timestamp = BigInt(Date.now() - FLUXER_EPOCH);
+	} else {
+		timestamp = snowflake >> 22n;
+	}
+	return Math.floor(Number(timestamp / BUCKET_SIZE));
+};
+
+export const makeBuckets = (startId: bigint | null, endId: bigint | null = null): Array<number> => {
+	const start = makeBucket(startId);
+	const end = makeBucket(endId);
+	const result: Array<number> = [];
+	for (let i = start; i <= end; i++) {
+		result.push(i);
+	}
+	return result;
+};