broadcast-channel/dist/lib/method-chooser.js

A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers, NodeJs, Deno and iframes

"use strict";

var _typeof = require("@babel/runtime/helpers/typeof");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.chooseMethod = chooseMethod;
var _native = require("./methods/native.js");
var _indexedDb = require("./methods/indexed-db.js");
var _localstorage = require("./methods/localstorage.js");
var _simulate = require("./methods/simulate.js");
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t2 in e) "default" !== _t2 && {}.hasOwnProperty.call(e, _t2) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t2)) && (i.get || i.set) ? o(f, _t2, i) : f[_t2] = e[_t2]); return f; })(e, t); }
// the line below will be removed from es5/browser builds

// order is important
var METHODS = [_native.NativeMethod,
// fastest
_indexedDb.IndexedDBMethod, _localstorage.LocalstorageMethod];
function chooseMethod(options) {
  var chooseMethods = [].concat(options.methods, METHODS).filter(Boolean);

  // the line below will be removed from es5/browser builds

  // directly chosen
  if (options.type) {
    if (options.type === 'simulate') {
      // only use simulate-method if directly chosen
      return _simulate.SimulateMethod;
    }
    var ret = chooseMethods.find(function (m) {
      return m.type === options.type;
    });
    if (!ret) throw new Error('method-type ' + options.type + ' not found');else return ret;
  }

  /**
   * if no webworker support is needed,
   * remove idb from the list so that localstorage will be chosen
   */
  if (!options.webWorkerSupport) {
    chooseMethods = chooseMethods.filter(function (m) {
      return m.type !== 'idb';
    });
  }
  var useMethod = chooseMethods.find(function (method) {
    return method.canBeUsed();
  });
  if (!useMethod) {
    throw new Error("No usable method found in " + JSON.stringify(METHODS.map(function (m) {
      return m.type;
    })));
  } else {
    return useMethod;
  }
}