import { getCacheScopeIdentifier } from "./cache-scope-identifier";
const getCacheKey = (scopeIdentifier: string, prefix: string) => {
const hash = scopeIdentifier.split("").reduce((acc, char) => {
return ((acc << 5) - acc + char.charCodeAt(0)) | 0;
}, 0);
return `${prefix}-${Math.abs(hash)}`;
};
const MAX_CACHE_SIZE = 4 * 1024 * 1024; // 4MB limit (localStorage typically allows 5-10MB)
export const loadFromCache = <T>(prefix: string): T | null => {
try {
const scopeIdentifier = getCacheScopeIdentifier();
if (!scopeIdentifier) return null;
const cached = localStorage.getItem(getCacheKey(scopeIdentifier, prefix));
if (!cached) return null;
return JSON.parse(cached);
} catch (error) {
console.error("Error loading cached data:", error);
return null;
}
};
export const saveToCache = (prefix: string, data: unknown): void => {
const scopeIdentifier = getCacheScopeIdentifier();
if (!scopeIdentifier) return;
try {
const serialized = JSON.stringify(data);
if (serialized.length > MAX_CACHE_SIZE) {
console.warn(
`Cache data too large (${(serialized.length / 1024 / 1024).toFixed(2)}MB), skipping cache`,
);
return;
}
localStorage.setItem(getCacheKey(scopeIdentifier, prefix), serialized);
} catch (error) {
if (
error instanceof DOMException &&
(error.name === "QuotaExceededError" || error.code === 22)
) {
console.warn("localStorage quota exceeded, clearing old cache entries");
try {
// Clear old cache entries and retry - match both 'cache' and 'superglue-' prefixed keys
const keys = Object.keys(localStorage);
const currentKey = getCacheKey(scopeIdentifier, prefix);
keys
.filter((k) => k !== currentKey && (k.includes("cache") || k.startsWith("superglue-")))
.forEach((k) => localStorage.removeItem(k));
const serialized = JSON.stringify(data);
if (serialized.length <= MAX_CACHE_SIZE) {
localStorage.setItem(currentKey, serialized);
}
} catch (retryError) {
// If still failing, just give up silently - cache is non-essential
console.warn("Failed to save cache after cleanup, skipping");
}
} else {
console.error("Error saving cache data:", error);
}
}
};
