localforage
Version:
Offline storage, improved.
1,539 lines (1,327 loc) • 93.8 kB
JavaScript
/*!
localForage -- Offline Storage, Improved
Version 1.10.0
https://localforage.github.io/localForage
(c) 2013-2017 Mozilla, Apache License 2.0
*/
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.localforage = f()}})(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 a(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 || !idb.open) {
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
// (see: https://github.com/pouchdb/pouchdb/issues/5572).
// Safari 10.1 shipped with fetch, we can use that to detect it.
// Note: this creates issues with `window.fetch` polyfills and
// overrides; see:
// https://github.com/localForage/localForage/issues/856
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 () {
var db = openreq.result;
db.onversionchange = function (e) {
// Triggered when the database is modified (e.g. adding an objectStore) or
// deleted (even when initiated by other sessions in different tabs).
// Closing the connection here prevents those operations from being blocked.
// If the database is accessed again later by this instance, the connection
// will be reopened or the database recreated as needed.
e.target.close();
};
resolve(db);
_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
};
if (options) {
for (var i in options) {
dbInfo[i] = options[i];
}
}
// Get the current context of the database;
var dbContext = dbContexts[dbInfo.name];
// ...or create a new context.
if (!dbContext) {
dbContext = createDbContext();
// Register the new context in the global container.
dbContexts[dbInfo.name] = dbContext;
}
// Register itself as a running localForage in the current context.
dbContext.forages.push(self);
// Replace the default `ready()` function with the specialized one.
if (!self._initReady) {
self._initReady = self.ready;
self.ready = _fullyReady;
}
// Create an array of initialization states of the related localForages.
var initPromises = [];
function ignoreErrors() {
// Don't handle errors here,
// just makes sure related localForages aren't pending.
return Promise$1.resolve();
}
for (var j = 0; j < dbContext.forages.length; j++) {
var forage = dbContext.forages[j];
if (forage !== self) {
// Don't wait for itself...
initPromises.push(forage._initReady()["catch"](ignoreErrors));
}
}
// Take a snapshot of the related localForages.
var forages = dbContext.forages.slice(0);
// Initialize the connection process only when
// all the related localForages aren't pending.
return Promise$1.all(initPromises).then(function () {
dbInfo.db = dbContext.db;
// Get the connection or open a new one without upgrade.
return _getOriginalConnection(dbInfo);
}).then(function (db) {
dbInfo.db = db;
if (_isUpgradeNeeded(dbInfo, self._defaultConfig.version)) {
// Reopen the database for upgrading.
return _getUpgradedConnection(dbInfo);
}
return db;
}).then(function (db) {
dbInfo.db = dbContext.db = db;
self._dbInfo = dbInfo;
// Share the final connection amongst related localForages.
for (var k = 0; k < forages.length; k++) {
var forage = forages[k];
if (forage !== self) {
// Self is already up-to-date.
forage._dbInfo.db = dbInfo.db;
forage._dbInfo.version = dbInfo.version;
}
}
});
}
function getItem(key, callback) {
var self = this;
key = normalizeKey(key);
var promise = new Promise$1(function (resolve, reject) {
self.ready().then(function () {
createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
var req = store.get(key);
req.onsuccess = function () {
var value = req.result;
if (value === undefined) {
value = null;
}
if (_isEncodedBlob(value)) {
value = _decodeBlob(value);
}
resolve(value);
};
req.onerror = function () {
reject(req.error);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
// Iterate over all items stored in database.
function iterate(iterator, callback) {
var self = this;
var promise = new Promise$1(function (resolve, reject) {
self.ready().then(function () {
createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
var req = store.openCursor();
var iterationNumber = 1;
req.onsuccess = function () {
var cursor = req.result;
if (cursor) {
var value = cursor.value;
if (_isEncodedBlob(value)) {
value = _decodeBlob(value);
}
var result = iterator(value, cursor.key, iterationNumber++);
// when the iterator callback returns any
// (non-`undefined`) value, then we stop
// the iteration immediately
if (result !== void 0) {
resolve(result);
} else {
cursor["continue"]();
}
} else {
resolve();
}
};
req.onerror = function () {
reject(req.error);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
function setItem(key, value, callback) {
var self = this;
key = normalizeKey(key);
var promise = new Promise$1(function (resolve, reject) {
var dbInfo;
self.ready().then(function () {
dbInfo = self._dbInfo;
if (toString.call(value) === '[object Blob]') {
return _checkBlobSupport(dbInfo.db).then(function (blobSupport) {
if (blobSupport) {
return value;
}
return _encodeBlob(value);
});
}
return value;
}).then(function (value) {
createTransaction(self._dbInfo, READ_WRITE, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
// The reason we don't _save_ null is because IE 10 does
// not support saving the `null` type in IndexedDB. How
// ironic, given the bug below!
// See: https://github.com/mozilla/localForage/issues/161
if (value === null) {
value = undefined;
}
var req = store.put(value, key);
transaction.oncomplete = function () {
// Cast to undefined so the value passed to
// callback/promise is the same as what one would get out
// of `getItem()` later. This leads to some weirdness
// (setItem('foo', undefined) will return `null`), but
// it's not my fault localStorage is our baseline and that
// it's weird.
if (value === undefined) {
value = null;
}
resolve(value);
};
transaction.onabort = transaction.onerror = function () {
var err = req.error ? req.error : req.transaction.error;
reject(err);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
function removeItem(key, callback) {
var self = this;
key = normalizeKey(key);
var promise = new Promise$1(function (resolve, reject) {
self.ready().then(function () {
createTransaction(self._dbInfo, READ_WRITE, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
// We use a Grunt task to make this safe for IE and some
// versions of Android (including those used by Cordova).
// Normally IE won't like `.delete()` and will insist on
// using `['delete']()`, but we have a build step that
// fixes this for us now.
var req = store["delete"](key);
transaction.oncomplete = function () {
resolve();
};
transaction.onerror = function () {
reject(req.error);
};
// The request will be also be aborted if we've exceeded our storage
// space.
transaction.onabort = function () {
var err = req.error ? req.error : req.transaction.error;
reject(err);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
function clear(callback) {
var self = this;
var promise = new Promise$1(function (resolve, reject) {
self.ready().then(function () {
createTransaction(self._dbInfo, READ_WRITE, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
var req = store.clear();
transaction.oncomplete = function () {
resolve();
};
transaction.onabort = transaction.onerror = function () {
var err = req.error ? req.error : req.transaction.error;
reject(err);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
function length(callback) {
var self = this;
var promise = new Promise$1(function (resolve, reject) {
self.ready().then(function () {
createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
var req = store.count();
req.onsuccess = function () {
resolve(req.result);
};
req.onerror = function () {
reject(req.error);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
function key(n, callback) {
var self = this;
var promise = new Promise$1(function (resolve, reject) {
if (n < 0) {
resolve(null);
return;
}
self.ready().then(function () {
createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
var advanced = false;
var req = store.openKeyCursor();
req.onsuccess = function () {
var cursor = req.result;
if (!cursor) {
// this means there weren't enough keys
resolve(null);
return;
}
if (n === 0) {
// We have the first key, return it if that's what they
// wanted.
resolve(cursor.key);
} else {
if (!advanced) {
// Otherwise, ask the cursor to skip ahead n
// records.
advanced = true;
cursor.advance(n);
} else {
// When we get here, we've got the nth key.
resolve(cursor.key);
}
}
};
req.onerror = function () {
reject(req.error);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
function keys(callback) {
var self = this;
var promise = new Promise$1(function (resolve, reject) {
self.ready().then(function () {
createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
if (err) {
return reject(err);
}
try {
var store = transaction.objectStore(self._dbInfo.storeName);
var req = store.openKeyCursor();
var keys = [];
req.onsuccess = function () {
var cursor = req.result;
if (!cursor) {
resolve(keys);
return;
}
keys.push(cursor.key);
cursor["continue"]();
};
req.onerror = function () {
reject(req.error);
};
} catch (e) {
reject(e);
}
});
})["catch"](reject);
});
executeCallback(promise, callback);
return promise;
}
function dropInstance(options, callback) {
callback = getCallback.apply(this, arguments);
var currentConfig = this.config();
options = typeof options !== 'function' && options || {};
if (!options.name) {
options.name = options.name || currentConfig.name;
options.storeName = options.storeName || currentConfig.storeName;
}
var self = this;
var promise;
if (!options.name) {
promise = Promise$1.reject('Invalid arguments');
} else {
var isCurrentDb = options.name === currentConfig.name && self._dbInfo.db;
var dbPromise = isCurrentDb ? Promise$1.resolve(self._dbInfo.db) : _getOriginalConnection(options).then(function (db) {
var dbContext = dbContexts[options.name];
var forages = dbContext.forages;
dbContext.db = db;
for (var i = 0; i < forages.length; i++) {
forages[i]._dbInfo.db = db;
}
return db;
});
if (!options.storeName) {
promise = dbPromise.then(function (db) {
_deferReadiness(options);
var dbContext = dbContexts[options.name];
var forages = dbContext.forages;
db.close();
for (var i = 0; i < forages.length; i++) {
var forage = forages[i];
forage._dbInfo.db = null;
}
var dropDBPromise = new Promise$1(function (resolve, reject) {
var req = idb.deleteDatabase(options.name);
req.onerror = function () {
var db = req.result;
if (db) {
db.close();
}
reject(req.error);
};
req.onblocked = function () {
// Closing all open connections in onversionchange handler should prevent this situation, but if
// we do get here, it just means the request remains pending - eventually it will succeed or error
console.warn('dropInstance blocked for database "' + options.name + '" until all open connections are closed');
};
req.onsuccess = function () {
var db = req.result;
if (db) {
db.close();
}
resolve(db);
};
});
return dropDBPromise.then(function (db) {
dbContext.db = db;
for (var i = 0; i < forages.length; i++) {
var _forage = forages[i];
_advanceReadiness(_forage._dbInfo);
}
})["catch"](function (err) {
(_rejectReadiness(options, err) || Promise$1.resolve())["catch"](function () {});
throw err;
});
});
} else {
promise = dbPromise.then(function (db) {
if (!db.objectStoreNames.contains(options.storeName)) {
return;
}
var newVersion = db.version + 1;
_deferReadiness(options);
var dbContext = dbContexts[options.name];
var forages = dbContext.forages;
db.close();
for (var i = 0; i < forages.length; i++) {
var forage = forages[i];
forage._dbInfo.db = null;
forage._dbInfo.version = newVersion;
}
var dropObjectPromise = new Promise$1(function (resolve, reject) {
var req = idb.open(options.name, newVersion);
req.onerror = function (err) {
var db = req.result;
db.close();
reject(err);
};
req.onupgradeneeded = function () {
var db = req.result;
db.deleteObjectStore(options.storeName);
};
req.onsuccess = function () {
var db = req.result;
db.close();
resolve(db);
};
});
return dropObjectPromise.then(function (db) {
dbContext.db = db;
for (var j = 0; j < forages.length; j++) {
var _forage2 = forages[j];
_forage2._dbInfo.db = db;
_advanceReadiness(_forage2._dbInfo);
}
})["catch"](function (err) {
(_rejectReadiness(options, err) || Promise$1.resolve())["catch"](function () {});
throw err;
});
});
}
}
executeCallback(promise, callback);
return promise;
}
var asyncStorage = {
_driver: 'asyncStorage',
_initStorage: _initStorage,
_support: isIndexedDBValid(),
iterate: iterate,
getItem: getItem,
setItem: setItem,
removeItem: removeItem,
clear: clear,
length: length,
key: key,
keys: keys,
dropInstance: dropInstance
};
function isWebSQLValid() {
return typeof openDatabase === 'function';
}
// Sadly, the best way to save binary data in WebSQL/localStorage is serializing
// it to Base64, so this is how we store it to prevent very strange errors with less
// verbose ways of binary <-> string data storage.
var BASE_CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var BLOB_TYPE_PREFIX = '~~local_forage_type~';
var BLOB_TYPE_PREFIX_REGEX = /^~~local_forage_type~([^~]+)~/;
var SERIALIZED_MARKER = '__lfsc__:';
var SERIALIZED_MARKER_LENGTH = SERIALIZED_MARKER.length;
// OMG the serializations!
var TYPE_ARRAYBUFFER = 'arbf';
var TYPE_BLOB = 'blob';
var TYPE_INT8ARRAY = 'si08';
var TYPE_UINT8ARRAY = 'ui08';
var TYPE_UINT8CLAMPEDARRAY = 'uic8';
var TYPE_INT16ARRAY = 'si16';
var TYPE_INT32ARRAY = 'si32';
var TYPE_UINT16ARRAY = 'ur16';
var TYPE_UINT32ARRAY = 'ui32';
var TYPE_FLOAT32ARRAY = 'fl32';
var TYPE_FLOAT64ARRAY = 'fl64';
var TYPE_SERIALIZED_MARKER_LENGTH = SERIALIZED_MARKER_LENGTH + TYPE_ARRAYBUFFER.length;
var toString$1 = Object.prototype.toString;
function stringToBuffer(serializedString) {
// Fill the string into a ArrayBuffer.
var bufferLength = serializedString.length * 0.75;
var len = serializedString.length;
var i;
var p = 0;
var encoded1, encoded2, encoded3, encoded4;
if (serializedString[serializedString.length - 1] === '=') {
bufferLength--;
if (serializedString[serializedString.length - 2] === '=') {
bufferLength--;
}
}
var buffer = new ArrayBuffer(bufferLength);
var bytes = new Uint8Array(buffer);
for (i = 0; i < len; i += 4) {
encoded1 = BASE_CHARS.indexOf(serializedString[i]);
encoded2 = BASE_CHARS.indexOf(serializedString[i + 1]);
encoded3 = BASE_CHARS.indexOf(serializedString[i + 2]);
encoded4 = BASE_CHARS.indexOf(serializedString[i + 3]);
/*jslint bitwise: true */
bytes[p++] = encoded1 << 2 | encoded2 >> 4;
bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
}
return buffer;
}
// Converts a buffer to a string to store, serialized, in the backend
// storage library.
function bufferToString(buffer) {
// base64-arraybuffer
var bytes = new Uint8Array(buffer);
var base64String = '';
var i;
for (i = 0; i < bytes.length; i += 3) {
/*jslint bitwise: true */
base64String += BASE_CHARS[bytes[i] >> 2];
base64String += BASE_CHARS[(bytes[i] & 3) << 4 | bytes[i + 1] >> 4];
base64String += BASE_CHARS[(bytes[i + 1] & 15) << 2 | bytes[i + 2] >> 6];
base64String += BASE_CHARS[bytes[i + 2] & 63];
}
if (bytes.length % 3 === 2) {
base64String = base64String.substring(0, base64String.length - 1) + '=';
} else if (bytes.length % 3 === 1) {
base64String = base64String.substring(0, base64String.length - 2) + '==';
}
return base64String;
}
// Serialize a value, afterwards executing a callback (which usually
// instructs the `setItem()` callback/promise to be executed). This is how
// we store binary data with localStorage.
function serialize(value, callback) {
var