@urql/exchange-graphcache/dist/urql-exchange-graphcache-default-storage.mjs

A normalized and configurable cache exchange for urql

var getRequestPromise = e => new Promise(((r, t) => {
  e.onerror = () => {
    t(e.error);
  };
  e.onsuccess = () => {
    r(e.result);
  };
}));

var getTransactionPromise = e => new Promise(((r, t) => {
  e.onerror = () => {
    t(e.error);
  };
  e.oncomplete = r;
}));

var makeDefaultStorage = e => {
  if (!e) {
    e = {};
  }
  var r;
  var t = e.idbName || "graphcache-v4";
  var a = "entries";
  var n = "metadata";
  var o = Object.create(null);
  var c = Math.floor((new Date).valueOf() / 864e5);
  var s = c - (e.maxAge || 7);
  var i = indexedDB.open(t, 1);
  var l = getRequestPromise(i);
  i.onupgradeneeded = () => {
    i.result.createObjectStore(a);
    i.result.createObjectStore(n);
  };
  return {
    clear: () => l.then((e => {
      var r = e.transaction([ n, a ], "readwrite");
      r.objectStore(n).clear();
      r.objectStore(a).clear();
      o = Object.create(null);
      return getTransactionPromise(r);
    })),
    readMetadata: () => l.then((e => getRequestPromise(e.transaction(n, "readonly").objectStore(n).get(n))), (() => null)),
    writeMetadata(e) {
      l.then((r => getRequestPromise(r.transaction(n, "readwrite").objectStore(n).put(e, n))), (() => {}));
    },
    writeData(e) {
      Object.assign(o, e);
      var toUndefined = () => {};
      return l.then((e => getRequestPromise(e.transaction(a, "readwrite").objectStore(a).put(o, c)))).then(toUndefined, toUndefined);
    },
    readData() {
      var e = {};
      return l.then((r => {
        var t = r.transaction(a, "readwrite");
        var n = t.objectStore(a);
        (n.openKeyCursor || n.openCursor).call(n).onsuccess = function() {
          if (this.result) {
            var {key: r} = this.result;
            if ("number" != typeof r || r < s) {
              n.delete(r);
            } else {
              var t = n.get(r);
              t.onsuccess = () => {
                var a = t.result;
                if (r === c) {
                  Object.assign(o, a);
                }
                Object.assign(e, a);
              };
            }
            this.result.continue();
          }
        };
        return getTransactionPromise(t);
      })).then((() => e), (() => o));
    },
    onCacheHydrated: e.onCacheHydrated,
    onOnline(e) {
      if (r) {
        window.removeEventListener("online", r);
        r = void 0;
      }
      window.addEventListener("online", r = () => {
        e();
      });
    }
  };
};

export { makeDefaultStorage };
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