db.js

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`6e3f55a5` 2023-10-13 Pavel Safronov	1	async function openDb() {
	2	const promise = new Promise((resolve, reject) => {
	3	const openRequest = indexedDB.open("hawkDb", 1);
	4
	5	openRequest.onupgradeneeded = function (e) {
	6	const db = e.target.result;
	7	if (!db.objectStoreNames.contains("spotify")) {
	8	db.createObjectStore("spotify");
	9	}
	10	};
	11
	12	openRequest.onsuccess = function (e) {
	13	const db = e.target.result;
	14	resolve(db);
	15	};
	16
	17	openRequest.onerror = function (e) {
	18	console.error("Error opening IndexedDB:", e);
	19	reject(e);
	20	};
	21	});
	22	const db = await promise;
	23	return db;
	24	}
	25
	26	async function deleteDb() {
	27	const promise = new Promise((resolve, reject) => {
	28	const deleteRequest = indexedDB.deleteDatabase("hawkDb");
	29
	30	deleteRequest.onsuccess = function (e) {
	31	resolve();
	32	};
	33
	34	deleteRequest.onerror = function (e) {
	35	console.error("Error deleting IndexedDB:", e);
	36	reject(e);
	37	};
	38	});
	39	await promise;
	40	}
	41
	42	async function setWithExpiry(db, key, value, ttl) {
	43	const item = {
	44	value: value,
	45	expiry: Date.now() + ttl
	46	};
	47	const transaction = db.transaction("spotify", "readwrite");
	48	const store = transaction.objectStore("spotify");
	49	store.put(item, key);
	50	await transaction.complete;
	51	}
	52
	53	async function getWithExpiry(db, key) {
	54	const transaction = db.transaction("spotify", "readonly");
	55	const store = transaction.objectStore("spotify");
	56	const promise = new Promise((resolve, reject) => {
	57	const request = store.get(key);
	58	request.onsuccess = function (e) {
	59	resolve(e.target.result);
	60	};
	61	request.onerror = function (e) {
	62	console.error("Error getting from IndexedDB:", e);
	63	reject(e);
	64	};
	65	});
	66	const item = await promise;
	67	if (!item) {
	68	return null;
	69	}
	70	console.debug(`Cache hit for ${key}`);
	71	console.debug(JSON.stringify(item))
	72	console.debug(item)
	73
	74	if (!item) {
	75	return null;
	76	}
	77	if (Date.now() > item.expiry) {
	78	return null;
	79	}
	80	return item.value;
	81	}