refactor: stricer domain: notifications

toju-app/src/app/domains/attachment/domain/logic/attachment.logic.ts

@@ -0,0 +1,19 @@
+import { MAX_AUTO_SAVE_SIZE_BYTES } from '../constants/attachment.constants';
+import type { Attachment } from '../models/attachment.model';
+
+export function isAttachmentMedia(attachment: Pick<Attachment, 'mime'>): boolean {
+  return attachment.mime.startsWith('image/') ||
+    attachment.mime.startsWith('video/') ||
+    attachment.mime.startsWith('audio/');
+}
+
+export function shouldAutoRequestWhenWatched(attachment: Attachment): boolean {
+  return attachment.isImage ||
+    (isAttachmentMedia(attachment) && attachment.size <= MAX_AUTO_SAVE_SIZE_BYTES);
+}
+
+export function shouldPersistDownloadedAttachment(attachment: Pick<Attachment, 'size' | 'mime'>): boolean {
+  return attachment.size <= MAX_AUTO_SAVE_SIZE_BYTES ||
+    attachment.mime.startsWith('video/') ||
+    attachment.mime.startsWith('audio/');
+}