@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 i = Math.floor((new Date).valueOf() / 864e5);
  var c = i - (e.maxAge || 7);
  var v = indexedDB.open(t, 1);
  var s = getRequestPromise(v);
  v.onupgradeneeded = () => {
    v.result.createObjectStore(a);
    v.result.createObjectStore(n);
  };
  var serializeEntry = e => e.replace(/:/g, "%3a");
  var deserializeEntry = e => e.replace(/%3a/g, ":");
  var deserializeBatch = e => {
    var r = {};
    var t = "";
    var a = "";
    var n = "";
    var o = 0;
    var i = 0;
    while (i < e.length) {
      n = "";
      while (":" !== (t = e[i++]) && t) {
        n += t;
      }
      if (o) {
        r[a] = deserializeEntry(n) || void 0;
        o = 0;
      } else {
        a = deserializeEntry(n);
        o = 1;
      }
    }
    return r;
  };
  return {
    clear: () => s.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: () => s.then((e => getRequestPromise(e.transaction(n, "readonly").objectStore(n).get(n))), (() => null)),
    writeMetadata(e) {
      s.then((r => getRequestPromise(r.transaction(n, "readwrite").objectStore(n).put(e, n))), (() => {}));
    },
    writeData(e) {
      Object.assign(o, e);
      var toUndefined = () => {};
      return s.then((e => getRequestPromise(e.transaction(a, "readwrite").objectStore(a).put((() => {
        var e = "";
        for (var r in o) {
          var t = o[r];
          e += serializeEntry(r);
          e += ":";
          if (t) {
            e += serializeEntry(t);
          }
          e += ":";
        }
        return e;
      })(), i)))).then(toUndefined, toUndefined);
    },
    readData() {
      var e = [];
      return s.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 < c) {
              n.delete(r);
            } else {
              var t = n.get(r);
              var a = e.length;
              e.push("");
              t.onsuccess = () => {
                var n = "" + t.result;
                if (r === i) {
                  Object.assign(o, deserializeBatch(n));
                }
                e[a] = n;
              };
            }
            this.result.continue();
          }
        };
        return getTransactionPromise(t);
      })).then((() => deserializeBatch(e.join(""))), (() => 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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