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b2ab61793d5a16ad16eb.worker.js
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b2ab61793d5a16ad16eb.worker.js
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/******/ (function(modules) { // webpackBootstrap
/******/ this["webpackChunktdweb"] = function webpackChunkCallback(chunkIds, moreModules) {
/******/ for(var moduleId in moreModules) {
/******/ modules[moduleId] = moreModules[moduleId];
/******/ }
/******/ while(chunkIds.length)
/******/ installedChunks[chunkIds.pop()] = 1;
/******/ };
/******/
/******/ // The module cache
/******/ var installedModules = {};
/******/
/******/ // object to store loaded chunks
/******/ // "1" means "already loaded"
/******/ var installedChunks = {
/******/ 0: 1
/******/ };
/******/
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/
/******/ // Check if module is in cache
/******/ if(installedModules[moduleId]) {
/******/ return installedModules[moduleId].exports;
/******/ }
/******/ // Create a new module (and put it into the cache)
/******/ var module = installedModules[moduleId] = {
/******/ i: moduleId,
/******/ l: false,
/******/ exports: {}
/******/ };
/******/
/******/ // Execute the module function
/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
/******/ // Flag the module as loaded
/******/ module.l = true;
/******/
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/
/******/ // This file contains only the entry chunk.
/******/ // The chunk loading function for additional chunks
/******/ __webpack_require__.e = function requireEnsure(chunkId) {
/******/ var promises = [];
/******/ promises.push(Promise.resolve().then(function() {
/******/ // "1" is the signal for "already loaded"
/******/ if(!installedChunks[chunkId]) {
/******/ importScripts(__webpack_require__.p + "" + chunkId + "." + "b2ab61793d5a16ad16eb" + ".worker.js");
/******/ }
/******/ }));
/******/ return Promise.all(promises);
/******/ };
/******/
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = modules;
/******/
/******/ // expose the module cache
/******/ __webpack_require__.c = installedModules;
/******/
/******/ // define getter function for harmony exports
/******/ __webpack_require__.d = function(exports, name, getter) {
/******/ if(!__webpack_require__.o(exports, name)) {
/******/ Object.defineProperty(exports, name, { enumerable: true, get: getter });
/******/ }
/******/ };
/******/
/******/ // define __esModule on exports
/******/ __webpack_require__.r = function(exports) {
/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ }
/******/ Object.defineProperty(exports, '__esModule', { value: true });
/******/ };
/******/
/******/ // create a fake namespace object
/******/ // mode & 1: value is a module id, require it
/******/ // mode & 2: merge all properties of value into the ns
/******/ // mode & 4: return value when already ns object
/******/ // mode & 8|1: behave like require
/******/ __webpack_require__.t = function(value, mode) {
/******/ if(mode & 1) value = __webpack_require__(value);
/******/ if(mode & 8) return value;
/******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
/******/ var ns = Object.create(null);
/******/ __webpack_require__.r(ns);
/******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value });
/******/ if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
/******/ return ns;
/******/ };
/******/
/******/ // getDefaultExport function for compatibility with non-harmony modules
/******/ __webpack_require__.n = function(module) {
/******/ var getter = module && module.__esModule ?
/******/ function getDefault() { return module['default']; } :
/******/ function getModuleExports() { return module; };
/******/ __webpack_require__.d(getter, 'a', getter);
/******/ return getter;
/******/ };
/******/
/******/ // Object.prototype.hasOwnProperty.call
/******/ __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ // __webpack_public_path__
/******/ __webpack_require__.p = "";
/******/
/******/
/******/ // Load entry module and return exports
/******/ return __webpack_require__(__webpack_require__.s = 10);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports, __webpack_require__) {
module.exports = __webpack_require__(9);
/***/ }),
/* 1 */
/***/ (function(module, exports) {
function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
try {
var info = gen[key](arg);
var value = info.value;
} catch (error) {
reject(error);
return;
}
if (info.done) {
resolve(value);
} else {
Promise.resolve(value).then(_next, _throw);
}
}
function _asyncToGenerator(fn) {
return function () {
var self = this,
args = arguments;
return new Promise(function (resolve, reject) {
var gen = fn.apply(self, args);
function _next(value) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
}
function _throw(err) {
asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
}
_next(undefined);
});
};
}
module.exports = _asyncToGenerator;
/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {
/* WEBPACK VAR INJECTION */(function(global) {var require;var require;/*!
localForage -- Offline Storage, Improved
Version 1.7.3
https://localforage.github.io/localForage
(c) 2013-2017 Mozilla, Apache License 2.0
*/
(function(f){if(true){module.exports=f()}else { var g; }})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return require(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw (f.code="MODULE_NOT_FOUND", f)}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
(function (global){
'use strict';
var Mutation = global.MutationObserver || global.WebKitMutationObserver;
var scheduleDrain;
{
if (Mutation) {
var called = 0;
var observer = new Mutation(nextTick);
var element = global.document.createTextNode('');
observer.observe(element, {
characterData: true
});
scheduleDrain = function () {
element.data = (called = ++called % 2);
};
} else if (!global.setImmediate && typeof global.MessageChannel !== 'undefined') {
var channel = new global.MessageChannel();
channel.port1.onmessage = nextTick;
scheduleDrain = function () {
channel.port2.postMessage(0);
};
} else if ('document' in global && 'onreadystatechange' in global.document.createElement('script')) {
scheduleDrain = function () {
// Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted
// into the document. Do so, thus queuing up the task. Remember to clean up once it's been called.
var scriptEl = global.document.createElement('script');
scriptEl.onreadystatechange = function () {
nextTick();
scriptEl.onreadystatechange = null;
scriptEl.parentNode.removeChild(scriptEl);
scriptEl = null;
};
global.document.documentElement.appendChild(scriptEl);
};
} else {
scheduleDrain = function () {
setTimeout(nextTick, 0);
};
}
}
var draining;
var queue = [];
//named nextTick for less confusing stack traces
function nextTick() {
draining = true;
var i, oldQueue;
var len = queue.length;
while (len) {
oldQueue = queue;
queue = [];
i = -1;
while (++i < len) {
oldQueue[i]();
}
len = queue.length;
}
draining = false;
}
module.exports = immediate;
function immediate(task) {
if (queue.push(task) === 1 && !draining) {
scheduleDrain();
}
}
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],2:[function(_dereq_,module,exports){
'use strict';
var immediate = _dereq_(1);
/* istanbul ignore next */
function INTERNAL() {}
var handlers = {};
var REJECTED = ['REJECTED'];
var FULFILLED = ['FULFILLED'];
var PENDING = ['PENDING'];
module.exports = Promise;
function Promise(resolver) {
if (typeof resolver !== 'function') {
throw new TypeError('resolver must be a function');
}
this.state = PENDING;
this.queue = [];
this.outcome = void 0;
if (resolver !== INTERNAL) {
safelyResolveThenable(this, resolver);
}
}
Promise.prototype["catch"] = function (onRejected) {
return this.then(null, onRejected);
};
Promise.prototype.then = function (onFulfilled, onRejected) {
if (typeof onFulfilled !== 'function' && this.state === FULFILLED ||
typeof onRejected !== 'function' && this.state === REJECTED) {
return this;
}
var promise = new this.constructor(INTERNAL);
if (this.state !== PENDING) {
var resolver = this.state === FULFILLED ? onFulfilled : onRejected;
unwrap(promise, resolver, this.outcome);
} else {
this.queue.push(new QueueItem(promise, onFulfilled, onRejected));
}
return promise;
};
function QueueItem(promise, onFulfilled, onRejected) {
this.promise = promise;
if (typeof onFulfilled === 'function') {
this.onFulfilled = onFulfilled;
this.callFulfilled = this.otherCallFulfilled;
}
if (typeof onRejected === 'function') {
this.onRejected = onRejected;
this.callRejected = this.otherCallRejected;
}
}
QueueItem.prototype.callFulfilled = function (value) {
handlers.resolve(this.promise, value);
};
QueueItem.prototype.otherCallFulfilled = function (value) {
unwrap(this.promise, this.onFulfilled, value);
};
QueueItem.prototype.callRejected = function (value) {
handlers.reject(this.promise, value);
};
QueueItem.prototype.otherCallRejected = function (value) {
unwrap(this.promise, this.onRejected, value);
};
function unwrap(promise, func, value) {
immediate(function () {
var returnValue;
try {
returnValue = func(value);
} catch (e) {
return handlers.reject(promise, e);
}
if (returnValue === promise) {
handlers.reject(promise, new TypeError('Cannot resolve promise with itself'));
} else {
handlers.resolve(promise, returnValue);
}
});
}
handlers.resolve = function (self, value) {
var result = tryCatch(getThen, value);
if (result.status === 'error') {
return handlers.reject(self, result.value);
}
var thenable = result.value;
if (thenable) {
safelyResolveThenable(self, thenable);
} else {
self.state = FULFILLED;
self.outcome = value;
var i = -1;
var len = self.queue.length;
while (++i < len) {
self.queue[i].callFulfilled(value);
}
}
return self;
};
handlers.reject = function (self, error) {
self.state = REJECTED;
self.outcome = error;
var i = -1;
var len = self.queue.length;
while (++i < len) {
self.queue[i].callRejected(error);
}
return self;
};
function getThen(obj) {
// Make sure we only access the accessor once as required by the spec
var then = obj && obj.then;
if (obj && (typeof obj === 'object' || typeof obj === 'function') && typeof then === 'function') {
return function appyThen() {
then.apply(obj, arguments);
};
}
}
function safelyResolveThenable(self, thenable) {
// Either fulfill, reject or reject with error
var called = false;
function onError(value) {
if (called) {
return;
}
called = true;
handlers.reject(self, value);
}
function onSuccess(value) {
if (called) {
return;
}
called = true;
handlers.resolve(self, value);
}
function tryToUnwrap() {
thenable(onSuccess, onError);
}
var result = tryCatch(tryToUnwrap);
if (result.status === 'error') {
onError(result.value);
}
}
function tryCatch(func, value) {
var out = {};
try {
out.value = func(value);
out.status = 'success';
} catch (e) {
out.status = 'error';
out.value = e;
}
return out;
}
Promise.resolve = resolve;
function resolve(value) {
if (value instanceof this) {
return value;
}
return handlers.resolve(new this(INTERNAL), value);
}
Promise.reject = reject;
function reject(reason) {
var promise = new this(INTERNAL);
return handlers.reject(promise, reason);
}
Promise.all = all;
function all(iterable) {
var self = this;
if (Object.prototype.toString.call(iterable) !== '[object Array]') {
return this.reject(new TypeError('must be an array'));
}
var len = iterable.length;
var called = false;
if (!len) {
return this.resolve([]);
}
var values = new Array(len);
var resolved = 0;
var i = -1;
var promise = new this(INTERNAL);
while (++i < len) {
allResolver(iterable[i], i);
}
return promise;
function allResolver(value, i) {
self.resolve(value).then(resolveFromAll, function (error) {
if (!called) {
called = true;
handlers.reject(promise, error);
}
});
function resolveFromAll(outValue) {
values[i] = outValue;
if (++resolved === len && !called) {
called = true;
handlers.resolve(promise, values);
}
}
}
}
Promise.race = race;
function race(iterable) {
var self = this;
if (Object.prototype.toString.call(iterable) !== '[object Array]') {
return this.reject(new TypeError('must be an array'));
}
var len = iterable.length;
var called = false;
if (!len) {
return this.resolve([]);
}
var i = -1;
var promise = new this(INTERNAL);
while (++i < len) {
resolver(iterable[i]);
}
return promise;
function resolver(value) {
self.resolve(value).then(function (response) {
if (!called) {
called = true;
handlers.resolve(promise, response);
}
}, function (error) {
if (!called) {
called = true;
handlers.reject(promise, error);
}
});
}
}
},{"1":1}],3:[function(_dereq_,module,exports){
(function (global){
'use strict';
if (typeof global.Promise !== 'function') {
global.Promise = _dereq_(2);
}
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"2":2}],4:[function(_dereq_,module,exports){
'use strict';
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function getIDB() {
/* global indexedDB,webkitIndexedDB,mozIndexedDB,OIndexedDB,msIndexedDB */
try {
if (typeof indexedDB !== 'undefined') {
return indexedDB;
}
if (typeof webkitIndexedDB !== 'undefined') {
return webkitIndexedDB;
}
if (typeof mozIndexedDB !== 'undefined') {
return mozIndexedDB;
}
if (typeof OIndexedDB !== 'undefined') {
return OIndexedDB;
}
if (typeof msIndexedDB !== 'undefined') {
return msIndexedDB;
}
} catch (e) {
return;
}
}
var idb = getIDB();
function isIndexedDBValid() {
try {
// Initialize IndexedDB; fall back to vendor-prefixed versions
// if needed.
if (!idb) {
return false;
}
// We mimic PouchDB here;
//
// We test for openDatabase because IE Mobile identifies itself
// as Safari. Oh the lulz...
var isSafari = typeof openDatabase !== 'undefined' && /(Safari|iPhone|iPad|iPod)/.test(navigator.userAgent) && !/Chrome/.test(navigator.userAgent) && !/BlackBerry/.test(navigator.platform);
var hasFetch = typeof fetch === 'function' && fetch.toString().indexOf('[native code') !== -1;
// Safari <10.1 does not meet our requirements for IDB support (#5572)
// since Safari 10.1 shipped with fetch, we can use that to detect it
return (!isSafari || hasFetch) && typeof indexedDB !== 'undefined' &&
// some outdated implementations of IDB that appear on Samsung
// and HTC Android devices <4.4 are missing IDBKeyRange
// See: https://github.com/mozilla/localForage/issues/128
// See: https://github.com/mozilla/localForage/issues/272
typeof IDBKeyRange !== 'undefined';
} catch (e) {
return false;
}
}
// Abstracts constructing a Blob object, so it also works in older
// browsers that don't support the native Blob constructor. (i.e.
// old QtWebKit versions, at least).
// Abstracts constructing a Blob object, so it also works in older
// browsers that don't support the native Blob constructor. (i.e.
// old QtWebKit versions, at least).
function createBlob(parts, properties) {
/* global BlobBuilder,MSBlobBuilder,MozBlobBuilder,WebKitBlobBuilder */
parts = parts || [];
properties = properties || {};
try {
return new Blob(parts, properties);
} catch (e) {
if (e.name !== 'TypeError') {
throw e;
}
var Builder = typeof BlobBuilder !== 'undefined' ? BlobBuilder : typeof MSBlobBuilder !== 'undefined' ? MSBlobBuilder : typeof MozBlobBuilder !== 'undefined' ? MozBlobBuilder : WebKitBlobBuilder;
var builder = new Builder();
for (var i = 0; i < parts.length; i += 1) {
builder.append(parts[i]);
}
return builder.getBlob(properties.type);
}
}
// This is CommonJS because lie is an external dependency, so Rollup
// can just ignore it.
if (typeof Promise === 'undefined') {
// In the "nopromises" build this will just throw if you don't have
// a global promise object, but it would throw anyway later.
_dereq_(3);
}
var Promise$1 = Promise;
function executeCallback(promise, callback) {
if (callback) {
promise.then(function (result) {
callback(null, result);
}, function (error) {
callback(error);
});
}
}
function executeTwoCallbacks(promise, callback, errorCallback) {
if (typeof callback === 'function') {
promise.then(callback);
}
if (typeof errorCallback === 'function') {
promise["catch"](errorCallback);
}
}
function normalizeKey(key) {
// Cast the key to a string, as that's all we can set as a key.
if (typeof key !== 'string') {
console.warn(key + ' used as a key, but it is not a string.');
key = String(key);
}
return key;
}
function getCallback() {
if (arguments.length && typeof arguments[arguments.length - 1] === 'function') {
return arguments[arguments.length - 1];
}
}
// Some code originally from async_storage.js in
// [Gaia](https://github.com/mozilla-b2g/gaia).
var DETECT_BLOB_SUPPORT_STORE = 'local-forage-detect-blob-support';
var supportsBlobs = void 0;
var dbContexts = {};
var toString = Object.prototype.toString;
// Transaction Modes
var READ_ONLY = 'readonly';
var READ_WRITE = 'readwrite';
// Transform a binary string to an array buffer, because otherwise
// weird stuff happens when you try to work with the binary string directly.
// It is known.
// From http://stackoverflow.com/questions/14967647/ (continues on next line)
// encode-decode-image-with-base64-breaks-image (2013-04-21)
function _binStringToArrayBuffer(bin) {
var length = bin.length;
var buf = new ArrayBuffer(length);
var arr = new Uint8Array(buf);
for (var i = 0; i < length; i++) {
arr[i] = bin.charCodeAt(i);
}
return buf;
}
//
// Blobs are not supported in all versions of IndexedDB, notably
// Chrome <37 and Android <5. In those versions, storing a blob will throw.
//
// Various other blob bugs exist in Chrome v37-42 (inclusive).
// Detecting them is expensive and confusing to users, and Chrome 37-42
// is at very low usage worldwide, so we do a hacky userAgent check instead.
//
// content-type bug: https://code.google.com/p/chromium/issues/detail?id=408120
// 404 bug: https://code.google.com/p/chromium/issues/detail?id=447916
// FileReader bug: https://code.google.com/p/chromium/issues/detail?id=447836
//
// Code borrowed from PouchDB. See:
// https://github.com/pouchdb/pouchdb/blob/master/packages/node_modules/pouchdb-adapter-idb/src/blobSupport.js
//
function _checkBlobSupportWithoutCaching(idb) {
return new Promise$1(function (resolve) {
var txn = idb.transaction(DETECT_BLOB_SUPPORT_STORE, READ_WRITE);
var blob = createBlob(['']);
txn.objectStore(DETECT_BLOB_SUPPORT_STORE).put(blob, 'key');
txn.onabort = function (e) {
// If the transaction aborts now its due to not being able to
// write to the database, likely due to the disk being full
e.preventDefault();
e.stopPropagation();
resolve(false);
};
txn.oncomplete = function () {
var matchedChrome = navigator.userAgent.match(/Chrome\/(\d+)/);
var matchedEdge = navigator.userAgent.match(/Edge\//);
// MS Edge pretends to be Chrome 42:
// https://msdn.microsoft.com/en-us/library/hh869301%28v=vs.85%29.aspx
resolve(matchedEdge || !matchedChrome || parseInt(matchedChrome[1], 10) >= 43);
};
})["catch"](function () {
return false; // error, so assume unsupported
});
}
function _checkBlobSupport(idb) {
if (typeof supportsBlobs === 'boolean') {
return Promise$1.resolve(supportsBlobs);
}
return _checkBlobSupportWithoutCaching(idb).then(function (value) {
supportsBlobs = value;
return supportsBlobs;
});
}
function _deferReadiness(dbInfo) {
var dbContext = dbContexts[dbInfo.name];
// Create a deferred object representing the current database operation.
var deferredOperation = {};
deferredOperation.promise = new Promise$1(function (resolve, reject) {
deferredOperation.resolve = resolve;
deferredOperation.reject = reject;
});
// Enqueue the deferred operation.
dbContext.deferredOperations.push(deferredOperation);
// Chain its promise to the database readiness.
if (!dbContext.dbReady) {
dbContext.dbReady = deferredOperation.promise;
} else {
dbContext.dbReady = dbContext.dbReady.then(function () {
return deferredOperation.promise;
});
}
}
function _advanceReadiness(dbInfo) {
var dbContext = dbContexts[dbInfo.name];
// Dequeue a deferred operation.
var deferredOperation = dbContext.deferredOperations.pop();
// Resolve its promise (which is part of the database readiness
// chain of promises).
if (deferredOperation) {
deferredOperation.resolve();
return deferredOperation.promise;
}
}
function _rejectReadiness(dbInfo, err) {
var dbContext = dbContexts[dbInfo.name];
// Dequeue a deferred operation.
var deferredOperation = dbContext.deferredOperations.pop();
// Reject its promise (which is part of the database readiness
// chain of promises).
if (deferredOperation) {
deferredOperation.reject(err);
return deferredOperation.promise;
}
}
function _getConnection(dbInfo, upgradeNeeded) {
return new Promise$1(function (resolve, reject) {
dbContexts[dbInfo.name] = dbContexts[dbInfo.name] || createDbContext();
if (dbInfo.db) {
if (upgradeNeeded) {
_deferReadiness(dbInfo);
dbInfo.db.close();
} else {
return resolve(dbInfo.db);
}
}
var dbArgs = [dbInfo.name];
if (upgradeNeeded) {
dbArgs.push(dbInfo.version);
}
var openreq = idb.open.apply(idb, dbArgs);
if (upgradeNeeded) {
openreq.onupgradeneeded = function (e) {
var db = openreq.result;
try {
db.createObjectStore(dbInfo.storeName);
if (e.oldVersion <= 1) {
// Added when support for blob shims was added
db.createObjectStore(DETECT_BLOB_SUPPORT_STORE);
}
} catch (ex) {
if (ex.name === 'ConstraintError') {
console.warn('The database "' + dbInfo.name + '"' + ' has been upgraded from version ' + e.oldVersion + ' to version ' + e.newVersion + ', but the storage "' + dbInfo.storeName + '" already exists.');
} else {
throw ex;
}
}
};
}
openreq.onerror = function (e) {
e.preventDefault();
reject(openreq.error);
};
openreq.onsuccess = function () {
resolve(openreq.result);
_advanceReadiness(dbInfo);
};
});
}
function _getOriginalConnection(dbInfo) {
return _getConnection(dbInfo, false);
}
function _getUpgradedConnection(dbInfo) {
return _getConnection(dbInfo, true);
}
function _isUpgradeNeeded(dbInfo, defaultVersion) {
if (!dbInfo.db) {
return true;
}
var isNewStore = !dbInfo.db.objectStoreNames.contains(dbInfo.storeName);
var isDowngrade = dbInfo.version < dbInfo.db.version;
var isUpgrade = dbInfo.version > dbInfo.db.version;
if (isDowngrade) {
// If the version is not the default one
// then warn for impossible downgrade.
if (dbInfo.version !== defaultVersion) {
console.warn('The database "' + dbInfo.name + '"' + " can't be downgraded from version " + dbInfo.db.version + ' to version ' + dbInfo.version + '.');
}
// Align the versions to prevent errors.
dbInfo.version = dbInfo.db.version;
}
if (isUpgrade || isNewStore) {
// If the store is new then increment the version (if needed).
// This will trigger an "upgradeneeded" event which is required
// for creating a store.
if (isNewStore) {
var incVersion = dbInfo.db.version + 1;
if (incVersion > dbInfo.version) {
dbInfo.version = incVersion;
}
}
return true;
}
return false;
}
// encode a blob for indexeddb engines that don't support blobs
function _encodeBlob(blob) {
return new Promise$1(function (resolve, reject) {
var reader = new FileReader();
reader.onerror = reject;
reader.onloadend = function (e) {
var base64 = btoa(e.target.result || '');
resolve({
__local_forage_encoded_blob: true,
data: base64,
type: blob.type
});
};
reader.readAsBinaryString(blob);
});
}
// decode an encoded blob
function _decodeBlob(encodedBlob) {
var arrayBuff = _binStringToArrayBuffer(atob(encodedBlob.data));
return createBlob([arrayBuff], { type: encodedBlob.type });
}
// is this one of our fancy encoded blobs?
function _isEncodedBlob(value) {
return value && value.__local_forage_encoded_blob;
}
// Specialize the default `ready()` function by making it dependent
// on the current database operations. Thus, the driver will be actually
// ready when it's been initialized (default) *and* there are no pending
// operations on the database (initiated by some other instances).
function _fullyReady(callback) {
var self = this;
var promise = self._initReady().then(function () {
var dbContext = dbContexts[self._dbInfo.name];
if (dbContext && dbContext.dbReady) {
return dbContext.dbReady;
}
});
executeTwoCallbacks(promise, callback, callback);
return promise;
}
// Try to establish a new db connection to replace the
// current one which is broken (i.e. experiencing
// InvalidStateError while creating a transaction).
function _tryReconnect(dbInfo) {
_deferReadiness(dbInfo);
var dbContext = dbContexts[dbInfo.name];
var forages = dbContext.forages;
for (var i = 0; i < forages.length; i++) {
var forage = forages[i];
if (forage._dbInfo.db) {
forage._dbInfo.db.close();
forage._dbInfo.db = null;
}
}
dbInfo.db = null;
return _getOriginalConnection(dbInfo).then(function (db) {
dbInfo.db = db;
if (_isUpgradeNeeded(dbInfo)) {
// Reopen the database for upgrading.
return _getUpgradedConnection(dbInfo);
}
return db;
}).then(function (db) {
// store the latest db reference
// in case the db was upgraded
dbInfo.db = dbContext.db = db;
for (var i = 0; i < forages.length; i++) {
forages[i]._dbInfo.db = db;
}
})["catch"](function (err) {
_rejectReadiness(dbInfo, err);
throw err;
});
}
// FF doesn't like Promises (micro-tasks) and IDDB store operations,
// so we have to do it with callbacks
function createTransaction(dbInfo, mode, callback, retries) {
if (retries === undefined) {
retries = 1;
}
try {
var tx = dbInfo.db.transaction(dbInfo.storeName, mode);
callback(null, tx);
} catch (err) {
if (retries > 0 && (!dbInfo.db || err.name === 'InvalidStateError' || err.name === 'NotFoundError')) {
return Promise$1.resolve().then(function () {
if (!dbInfo.db || err.name === 'NotFoundError' && !dbInfo.db.objectStoreNames.contains(dbInfo.storeName) && dbInfo.version <= dbInfo.db.version) {
// increase the db version, to create the new ObjectStore
if (dbInfo.db) {
dbInfo.version = dbInfo.db.version + 1;
}
// Reopen the database for upgrading.
return _getUpgradedConnection(dbInfo);
}
}).then(function () {
return _tryReconnect(dbInfo).then(function () {
createTransaction(dbInfo, mode, callback, retries - 1);
});
})["catch"](callback);
}
callback(err);
}
}
function createDbContext() {
return {
// Running localForages sharing a database.
forages: [],
// Shared database.
db: null,
// Database readiness (promise).
dbReady: null,
// Deferred operations on the database.
deferredOperations: []
};
}
// Open the IndexedDB database (automatically creates one if one didn't
// previously exist), using any options set in the config.
function _initStorage(options) {
var self = this;
var dbInfo = {
db: null
};