fix and update

apps/frontend/lib/document-attachments.ts

@@ -0,0 +1,76 @@
+export type DocumentAttachmentMeta = {
+  fileName?: string;
+  contentType?: string;
+};
+
+export const DOCUMENT_FILE_ACCEPT =
+  'image/*,.pdf,.doc,.docx,.xls,.xlsx,.ppt,.pptx,.txt,.rtf,.odt,application/pdf,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document';
+
+const EXTENSION_TO_MIME: Record<string, string> = {
+  jpg: 'image/jpeg',
+  jpeg: 'image/jpeg',
+  png: 'image/png',
+  webp: 'image/webp',
+  gif: 'image/gif',
+  pdf: 'application/pdf',
+  doc: 'application/msword',
+  docx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+  xls: 'application/vnd.ms-excel',
+  xlsx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+  ppt: 'application/vnd.ms-powerpoint',
+  pptx: 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+  txt: 'text/plain',
+  rtf: 'application/rtf',
+  odt: 'application/vnd.oasis.opendocument.text'
+};
+
+export function resolveDocumentFileContentType(file: File) {
+  const fromType = file.type?.trim();
+  if (fromType && fromType !== 'application/octet-stream') {
+    return fromType;
+  }
+  const extension = file.name.split('.').pop()?.toLowerCase() ?? '';
+  return EXTENSION_TO_MIME[extension] ?? 'application/octet-stream';
+}
+
+export function inferAttachmentContentType(storageKey: string, meta?: DocumentAttachmentMeta) {
+  if (meta?.contentType) return meta.contentType;
+  const extension = storageKey.split('.').pop()?.toLowerCase() ?? '';
+  return EXTENSION_TO_MIME[extension] ?? 'application/octet-stream';
+}
+
+export function isImageAttachment(contentType: string) {
+  return contentType.startsWith('image/');
+}
+
+export function isPdfAttachment(contentType: string) {
+  return contentType === 'application/pdf';
+}
+
+export function attachmentKindLabel(contentType: string) {
+  if (isImageAttachment(contentType)) return 'Изображение';
+  if (isPdfAttachment(contentType)) return 'PDF';
+  if (contentType.includes('word') || contentType === 'application/msword') return 'Word';
+  if (contentType.includes('excel') || contentType === 'application/vnd.ms-excel') return 'Excel';
+  if (contentType.includes('powerpoint') || contentType === 'application/vnd.ms-powerpoint') return 'PowerPoint';
+  if (contentType === 'text/plain') return 'Текст';
+  return 'Файл';
+}
+
+export function attachmentDisplayName(storageKey: string, meta?: DocumentAttachmentMeta) {
+  if (meta?.fileName?.trim()) return meta.fileName.trim();
+  const parts = storageKey.split('/');
+  return parts[parts.length - 1] ?? 'Файл';
+}
+
+export function attachmentFileExtension(contentType: string, fileName?: string) {
+  const fromName = fileName?.split('.').pop()?.toUpperCase();
+  if (fromName && fromName.length <= 5) return fromName;
+  if (isPdfAttachment(contentType)) return 'PDF';
+  if (contentType.includes('word')) return 'DOC';
+  if (contentType.includes('excel')) return 'XLS';
+  if (contentType.includes('powerpoint')) return 'PPT';
+  if (contentType === 'text/plain') return 'TXT';
+  if (isImageAttachment(contentType)) return 'IMG';
+  return 'FILE';
+}