forked from Kieran/snort
cache NostrBand requests in localstorage
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parent
118ada989e
commit
8c1bbe58f6
42
packages/app/src/External/NostrBand.ts
vendored
42
packages/app/src/External/NostrBand.ts
vendored
@ -69,15 +69,41 @@ export default class NostrBandApi {
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return await this.#json<TrendingHashtagsResponse>("GET", "/v0/trending/hashtags");
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}
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async #json<T>(method: string, path: string) {
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async #json<T>(method: string, path: string, storageKey: string) {
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throwIfOffline();
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const res = await fetch(`${this.#url}${path}`, {
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method: method ?? "GET",
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});
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if (res.ok) {
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return (await res.json()) as T;
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} else {
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throw new NostrBandError("Failed to load content from nostr.band", await res.text(), res.status);
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// Try to get cached data first
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const cachedData = localStorage.getItem(storageKey);
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if (cachedData) {
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const parsedData = JSON.parse(cachedData);
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const { timestamp, data } = parsedData;
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const ageInMinutes = (new Date().getTime() - timestamp) / 1000 / 60;
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if (ageInMinutes < 15) {
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// Use cached data if it's not older than 15 minutes
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return data as T;
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}
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}
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// Fetch new data if no valid cache is found
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try {
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const res = await fetch(`${this.#url}${path}`, { method: method ?? "GET" });
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if (res.ok) {
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const data = (await res.json()) as T;
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// Cache the new data with a timestamp
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localStorage.setItem(storageKey, JSON.stringify({ data, timestamp: new Date().getTime() }));
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return data;
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} else {
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throw new NostrBandError("Failed to load content from nostr.band", await res.text(), res.status);
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}
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} catch (error) {
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if (cachedData) {
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// If an error occurs and there is cached data, return the cached data
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return JSON.parse(cachedData).data as T;
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} else {
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// If no cache is available, rethrow the error
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throw error;
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}
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}
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}
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}
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