Major 3.0 (#118)

Co-authored-by: Maison da Silva <maisonmdsgreen@hotmail.com>

features/collectionStorage/utils/saveCollectionsToCloud.ts

@@ -0,0 +1,55 @@
+import { CollectionItem } from "@/models/CollectionModels";
+import { compress } from "lzutf8";
+import { WxtStorageItem } from "wxt/storage";
+import { collectionStorage } from "./collectionStorage";
+import getChunkKeys from "./getChunkKeys";
+import serializeCollections from "./serializeCollections";
+
+export default async function saveCollectionsToCloud(collections: CollectionItem[], timestamp: number): Promise<void>
+{
+	if (!collections || collections.length < 1)
+	{
+		await collectionStorage.chunkCount.setValue(0);
+		await browser.storage.sync.remove(getChunkKeys());
+		return;
+	}
+
+	const data: string = compress(serializeCollections(collections), { outputEncoding: "Base64" });
+	const chunks: string[] = splitIntoChunks(data);
+
+	if (chunks.length > collectionStorage.maxChunkCount)
+		throw new Error("Data is too large to be stored in sync storage.");
+
+	// Since there's a limit for cloud write operations, we need to write all chunks in one go.
+	const newRecords: Record<string, string | number> =
+	{
+		[getStorageKey(collectionStorage.chunkCount)]: chunks.length,
+		[getStorageKey(collectionStorage.syncLastUpdated)]: timestamp
+	};
+
+	for (let i = 0; i < chunks.length; i++)
+		newRecords[`c${i}`] = chunks[i];
+
+	await browser.storage.sync.set(newRecords);
+
+	if (chunks.length < collectionStorage.maxChunkCount)
+		await browser.storage.sync.remove(getChunkKeys(chunks.length));
+}
+
+function splitIntoChunks(data: string): string[]
+{
+	// QUOTA_BYTES_PER_ITEM includes length of key name, length of content and 2 more bytes (for unknown reason).
+	const chunkKey: string = getChunkKeys(collectionStorage.maxChunkCount - 1)[0];
+	const chunkSize = (chrome.storage.sync.QUOTA_BYTES_PER_ITEM ?? 8192) - chunkKey.length - 2;
+	const chunks: string[] = [];
+
+	for (let i = 0; i < data.length; i += chunkSize)
+		chunks.push(data.slice(i, i + chunkSize));
+
+	return chunks;
+}
+
+function getStorageKey(storageItem: WxtStorageItem<any, any>): string
+{
+	return storageItem.key.split(":")[1];
+}