Move files

frontend/sync-client/src/utils/deserialize.test.ts

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+import init, { base64ToBytes } from "sync_lib";
+import fs from "fs";
+
+describe("deserialize", () => {
+	it("should serialize a Uint8Array to a base64 string", async () => {
+		const wasmBin = fs.readFileSync(
+			"../../backend/sync_lib/pkg/sync_lib_bg.wasm"
+		);
+		await init({ module_or_path: wasmBin });
+
+		const base64 = "SGVsbG8=";
+		const jsResult = base64ToBytes(base64);
+		const expected = new Uint8Array([72, 101, 108, 108, 111]);
+		expect(jsResult).toEqual(expected);
+		const rustResult = base64ToBytes(base64);
+		expect(jsResult).toEqual(rustResult);
+	});
+});

frontend/sync-client/src/utils/deserialize.ts

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+import { base64ToBytes } from "byte-base64";
+
+export function deserialize(data: string): Uint8Array {
+	return base64ToBytes(data);
+}

frontend/sync-client/src/utils/hash.ts

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+// https://stackoverflow.com/questions/7616461/generate-a-hash-from-string-in-javascript
+export function hash(content: Uint8Array): string {
+	let result = 0;
+	// eslint-disable-next-line @typescript-eslint/prefer-for-of
+	for (let i = 0; i < content.length; i++) {
+		result = (result << 5) - result + content[i];
+		result |= 0; // Convert to 32bit integer
+	}
+	return Math.abs(result).toString(16);
+}
+
+export const EMPTY_HASH = hash(new Uint8Array(0));

frontend/sync-client/src/utils/is-equal-bytes.test.ts

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+import { isEqualBytes } from "./is-equal-bytes";
+
+describe("isEqualBytes", () => {
+	it("should return true for equal byte arrays", () => {
+		const bytes1 = new Uint8Array([1, 2, 3, 4]);
+		const bytes2 = new Uint8Array([1, 2, 3, 4]);
+		expect(isEqualBytes(bytes1, bytes2)).toBe(true);
+	});
+
+	it("should return false for byte arrays of different lengths", () => {
+		const bytes1 = new Uint8Array([1, 2, 3, 4]);
+		const bytes2 = new Uint8Array([1, 2, 3]);
+		expect(isEqualBytes(bytes1, bytes2)).toBe(false);
+	});
+
+	it("should return true for empty byte arrays", () => {
+		const bytes1 = new Uint8Array([]);
+		const bytes2 = new Uint8Array([]);
+		expect(isEqualBytes(bytes1, bytes2)).toBe(true);
+	});
+
+	it("should return false for byte arrays with same length but different content", () => {
+		const bytes1 = new Uint8Array([1, 2, 3, 4]);
+		const bytes2 = new Uint8Array([4, 3, 2, 1]);
+		expect(isEqualBytes(bytes1, bytes2)).toBe(false);
+	});
+});

frontend/sync-client/src/utils/is-equal-bytes.ts

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+export function isEqualBytes(bytes1: Uint8Array, bytes2: Uint8Array): boolean {
+	if (bytes1.length !== bytes2.length) {
+		return false;
+	}
+
+	for (let i = 0; i < bytes1.length; i++) {
+		if (bytes1[i] !== bytes2[i]) {
+			return false;
+		}
+	}
+
+	return true;
+}

frontend/sync-client/src/utils/retried-fetch.ts

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+import * as fetchRetryFactory from "fetch-retry";
+import type { RequestInitRetryParams } from "fetch-retry";
+import { Logger } from "src/tracing/logger";
+
+const fetchWithRetry = fetchRetryFactory.default(fetch);
+
+function getUrlFromInput(input: RequestInfo | URL): string {
+	if (input instanceof URL) {
+		return input.href;
+	}
+	if (typeof input === "string") {
+		return input;
+	}
+	return input.url;
+}
+
+export async function retriedFetch(
+	input: RequestInfo | URL,
+	init: RequestInitRetryParams<typeof fetch> = {}
+): Promise<Response> {
+	return fetchWithRetry(input, {
+		retryOn: function (attempt, error, response) {
+			if (error !== null || !response || response.status >= 500) {
+				Logger.getInstance().warn(
+					`Retrying fetch for ${getUrlFromInput(input)}, attempt ${attempt}`
+				);
+
+				return true;
+			}
+			return false;
+		},
+		retries: 6,
+		retryDelay: (attempt) => Math.pow(1.5, attempt) * 500,
+		...init
+	});
+}

frontend/sync-client/src/utils/serialize.test.ts

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+import { serialize } from "./serialize";
+import init, { bytesToBase64 } from "sync_lib";
+import fs from "fs";
+
+describe("serialize", () => {
+	it("should serialize a Uint8Array to a base64 string", async () => {
+		const wasmBin = fs.readFileSync(
+			"../../backend/sync_lib/pkg/sync_lib_bg.wasm"
+		);
+		await init({ module_or_path: wasmBin });
+
+		const data = new Uint8Array([72, 101, 108, 108, 111]);
+		const jsResult = serialize(data);
+		const rustResult = bytesToBase64(data);
+		expect(rustResult).toBe("SGVsbG8=");
+		expect(jsResult).toBe(rustResult);
+	});
+});

frontend/sync-client/src/utils/serialize.ts

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+import { bytesToBase64 } from "byte-base64";
+
+export function serialize(data: Uint8Array): string {
+	return bytesToBase64(data);
+}