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fluxer_app/src/utils/MessageAttachmentUtils.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 CloudAttachment, CloudUpload} from '~/lib/CloudUpload';
+import {Logger} from '~/lib/Logger';
+import type {ApiAttachmentMetadata} from '~/utils/MessageRequestUtils';
+
+const logger = new Logger('MessageAttachmentUtils');
+
+export interface PreparedMessageAttachments {
+	attachments?: Array<ApiAttachmentMetadata>;
+	files?: Array<File>;
+}
+
+export const prepareAttachmentsForNonce = async (
+	nonce: string,
+	favoriteMemeId?: string,
+): Promise<PreparedMessageAttachments> => {
+	logger.debug(`Preparing attachments for nonce ${nonce}`);
+
+	const messageUpload = CloudUpload.getMessageUpload(nonce);
+	if (!messageUpload) {
+		throw new Error('No message upload found');
+	}
+
+	const files = messageUpload.attachments.map((att) => att.file);
+	const attachments = favoriteMemeId ? undefined : mapMessageUploadAttachments(messageUpload.attachments);
+
+	return {attachments, files};
+};
+
+export const mapMessageUploadAttachments = (attachments: Array<CloudAttachment>): Array<ApiAttachmentMetadata> =>
+	attachments.map((att, index) => ({
+		id: String(index),
+		filename: att.filename,
+		title: att.filename,
+		description: att.description,
+		flags: att.flags,
+	}));