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// idb-keyval.js 3.2.0
// https://github.com/jakearchibald/idb-keyval
// Copyright 2016, Jake Archibald
// Licensed under the Apache License, Version 2.0
var idbKeyval = (function (exports) {
'use strict';
class Store {
constructor(dbName = 'keyval-store', storeName = 'keyval') {
this.storeName = storeName;
this._dbp = new Promise((resolve, reject) => {
const openreq = indexedDB.open(dbName, 1);
openreq.onerror = () => reject(openreq.error);
openreq.onsuccess = () => resolve(openreq.result);
// First time setup: create an empty object store
openreq.onupgradeneeded = () => {
openreq.result.createObjectStore(storeName);
};
});
}
_withIDBStore(type, callback) {
return this._dbp.then(db => new Promise((resolve, reject) => {
const transaction = db.transaction(this.storeName, type);
transaction.oncomplete = () => resolve();
transaction.onabort = transaction.onerror = () => reject(transaction.error);
callback(transaction.objectStore(this.storeName));
}));
}
}
let store;
function getDefaultStore() {
if (!store)
store = new Store();
return store;
}
function get(key, store = getDefaultStore()) {
let req;
return store._withIDBStore('readonly', store => {
req = store.get(key);
}).then(() => req.result);
}
function set(key, value, store = getDefaultStore()) {
return store._withIDBStore('readwrite', store => {
store.put(value, key);
});
}
function del(key, store = getDefaultStore()) {
return store._withIDBStore('readwrite', store => {
store.delete(key);
});
}
function clear(store = getDefaultStore()) {
return store._withIDBStore('readwrite', store => {
store.clear();
});
}
function keys(store = getDefaultStore()) {
const keys = [];
return store._withIDBStore('readonly', store => {
// This would be store.getAllKeys(), but it isn't supported by Edge or Safari.
// And openKeyCursor isn't supported by Safari.
(store.openKeyCursor || store.openCursor).call(store).onsuccess = function () {
if (!this.result)
return;
keys.push(this.result.key);
this.result.continue();
};
}).then(() => keys);
}
exports.Store = Store;
exports.get = get;
exports.set = set;
exports.del = del;
exports.clear = clear;
exports.keys = keys;
return exports;
}({}));
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