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import { md5 } from 'main.md5';
const MAX_ITEMS_CNT = 100;
const MAX_SIZE_IN_BYTES = 5 * 1024 * 1024;
const CACHE_TTL = 3600;
export default class AutocompleteCache
{
static set(sourceCode: string, params: Object, data: Object)
{
const results = AutocompleteCache.#getAll(sourceCode);
results.push({
hash: AutocompleteCache.#makeParamsHash(params),
data: data,
});
BX.localStorage.set(
AutocompleteCache.#getStorageName(sourceCode),
AutocompleteCache.#getResultsToStore(results),
CACHE_TTL
);
}
static get(sourceCode: string, params: Object): ?Object
{
const hash = AutocompleteCache.#makeParamsHash(params);
const results = AutocompleteCache.#getAll(sourceCode);
for (const result of results)
{
if (result && result.hash === hash)
{
return result;
}
}
return null;
}
static #getResultsToStore(results: Array): Array
{
if (new Blob([JSON.stringify(results)]).size > MAX_SIZE_IN_BYTES)
{
return [];
}
if (results.length > MAX_ITEMS_CNT)
{
return results.slice(results.length - MAX_ITEMS_CNT);
}
return results;
}
static #getAll(sourceCode: string): Array
{
const currentResults = BX.localStorage.get(AutocompleteCache.#getStorageName(sourceCode));
return Array.isArray(currentResults) ? currentResults : [];
}
static #makeParamsHash(params: Object): string
{
return md5(JSON.stringify(params));
}
static #getStorageName(sourceCode: string): string
{
return `location${sourceCode}AutocompleteCache`;
}
}