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fluxer_api/src/channel/repositories/message/MessageAttachmentRepository.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 type {AttachmentID, ChannelID, MessageID} from '~/BrandedTypes';
+import {fetchMany, fetchOne} from '~/database/Cassandra';
+import type {AttachmentLookupRow} from '~/database/CassandraTypes';
+import {AttachmentLookup} from '~/Tables';
+
+const LOOKUP_ATTACHMENT_BY_CHANNEL_AND_FILENAME_QUERY = AttachmentLookup.selectCql({
+	where: [
+		AttachmentLookup.where.eq('channel_id'),
+		AttachmentLookup.where.eq('attachment_id'),
+		AttachmentLookup.where.eq('filename'),
+	],
+	limit: 1,
+});
+
+const LIST_CHANNEL_ATTACHMENTS_QUERY = AttachmentLookup.selectCql({
+	where: AttachmentLookup.where.eq('channel_id'),
+});
+
+export class MessageAttachmentRepository {
+	async lookupAttachmentByChannelAndFilename(
+		channelId: ChannelID,
+		attachmentId: AttachmentID,
+		filename: string,
+	): Promise<MessageID | null> {
+		const result = await fetchOne<AttachmentLookupRow>(LOOKUP_ATTACHMENT_BY_CHANNEL_AND_FILENAME_QUERY, {
+			channel_id: channelId,
+			attachment_id: attachmentId,
+			filename,
+		});
+		return result ? result.message_id : null;
+	}
+
+	async listChannelAttachments(channelId: ChannelID): Promise<Array<AttachmentLookupRow>> {
+		const results = await fetchMany<AttachmentLookupRow>(LIST_CHANNEL_ATTACHMENTS_QUERY, {
+			channel_id: channelId,
+		});
+		return results;
+	}
+}