packages/pass/store/sagas/rules/website-rules.saga.ts

   1 import { select } from 'redux-saga/effects';
   2
   3 import { WEBSITE_RULES_URL } from '@proton/pass/constants';
   4 import { validateRules } from '@proton/pass/lib/extension/utils/website-rules';
   5 import { resolveWebsiteRules } from '@proton/pass/store/actions/creators/rules';
   6 import { websiteRulesRequest } from '@proton/pass/store/actions/requests';
   7 import { createRequestSaga } from '@proton/pass/store/request/sagas';
   8 import type { RequestEntry, RequestStatus } from '@proton/pass/store/request/types';
   9 import { selectRequest } from '@proton/pass/store/selectors';
  10 import type { Maybe } from '@proton/pass/types';
  11 import { msToEpoch } from '@proton/pass/utils/time/epoch';
  12
  13 /* Don't fetch if the rules were not modified since our last fetch */
  14 const revalidateWebsiteRules = async (lastRequestedAt: number): Promise<boolean> => {
  15     if (lastRequestedAt === 0) return true;
  16     const header = (await fetch(WEBSITE_RULES_URL, { method: 'HEAD' })).headers.get('Last-Modified');
  17     const lastModified = header ? msToEpoch(new Date(header).getTime()) : 0;
  18     if (lastRequestedAt >= lastModified) return false;
  19
  20     return true;
  21 };
  22
  23 export default createRequestSaga({
  24     actions: resolveWebsiteRules,
  25     call: function* (_, { getStorage }) {
  26         const lastRequest: Maybe<RequestEntry<RequestStatus>> = yield select(selectRequest(websiteRulesRequest()));
  27         const lastRequestedAt = lastRequest?.status === 'success' ? lastRequest.requestedAt : 0;
  28
  29         if (yield revalidateWebsiteRules(lastRequestedAt)) {
  30             const response: Response = yield fetch(WEBSITE_RULES_URL);
  31             const rules: unknown = yield response.json();
  32             if (validateRules(rules)) yield getStorage?.().setItem('websiteRules', JSON.stringify(rules));
  33         }
  34
  35         return true;
  36     },
  37 });