| 1 | import type { FileBackedComposerAttachment } from "./composerImages"; |
| 2 | import { retainComposerAttachmentFile } from "./composerAttachmentFiles"; |
| 3 | |
| 4 | /** |
| 5 | * Preview retention for saved composer attachment copies. |
| 6 | * |
| 7 | * The durable owners of an attachment file (composer drafts, queued outbox |
| 8 | * messages) live in state, so this module cannot reach the ownership-cleanup |
| 9 | * sweep directly. Composer draft state registers the owner-side cleanup hook |
| 10 | * at module load; until then a release has nothing to retry, because no draft |
| 11 | * store has loaded yet and there is nothing to clean. |
| 12 | */ |
| 13 | type UnusedAttachmentHandler = (attachment: FileBackedComposerAttachment) => void; |
| 14 | |
| 15 | let onAttachmentUnused: UnusedAttachmentHandler | null = null; |
| 16 | |
| 17 | export function registerComposerAttachmentUnusedHandler(handler: UnusedAttachmentHandler): void { |
| 18 | onAttachmentUnused = handler; |
| 19 | } |
| 20 | |
| 21 | /** Keeps a native preview or upload readable until it finishes, then retries ownership cleanup. */ |
| 22 | export function retainComposerAttachmentFileForPreview( |
| 23 | attachment: FileBackedComposerAttachment, |
| 24 | ): () => void { |
| 25 | return retainComposerAttachmentFile(attachment.fileUri, () => { |
| 26 | onAttachmentUnused?.(attachment); |
| 27 | }); |
| 28 | } |