Function putExport

putExport(record: ExportRecord): Promise<void>

Stores a generated .xlsx export, then evicts the oldest exports until the store is within both caps: at most maxExportEntries records and at most maxExportsCacheBytes total bytes. The most recent export is always kept, even if it alone exceeds the byte budget.

Parameters

record: ExportRecord
The export record to persist (its id is the store key).

Returns Promise<void>

Resolves once the write and any eviction complete.

Example

await putExport({
  id: crypto.randomUUID(), createdAt: Date.now(), filename: "chempal-export.xlsx",
  query: "acetone", scope: "filtered", rowCount: 12, sizeBytes: blob.size, blob,
});

Source

export async function putExport(record: ExportRecord): Promise<void> {
  try {
    const db = await getDB();
    const tx = db.transaction(IDB_STORE.EXPORTS, 'readwrite');
    const store = tx.objectStore(IDB_STORE.EXPORTS);
    await store.put(record);

    // Oldest first, so we can evict from the front while keeping the newest.
    const all = (await store.getAll()).sort((a, b) => a.createdAt - b.createdAt);
    let totalBytes = all.reduce((sum, entry) => sum + entry.sizeBytes, 0);
    let index = 0;
    while (
      index < all.length - 1 &&
      (all.length - index > MAX_EXPORT_ENTRIES || totalBytes > MAX_EXPORT_CACHE_BYTES)
    ) {
      const victim = all[index];
      await store.delete(victim.id);
      totalBytes -= victim.sizeBytes;
      index++;
    }

    await tx.done;
    emitExportsUpdated();
  } catch (error) {
    logger.error('Failed to put export in IndexedDB', { error });
  }
}