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* @license
* Copyright 2019 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { DB, openDb } from 'idb';
import { AppConfig } from '../interfaces/app-config';
const DATABASE_NAME = 'firebase-installations-database';
const DATABASE_VERSION = 1;
const OBJECT_STORE_NAME = 'firebase-installations-store';
let dbPromise: Promise<DB> | null = null;
function getDbPromise(): Promise<DB> {
if (!dbPromise) {
dbPromise = openDb(DATABASE_NAME, DATABASE_VERSION, upgradeDB => {
// We don't use 'break' in this switch statement, the fall-through
// behavior is what we want, because if there are multiple versions between
// the old version and the current version, we want ALL the migrations
// that correspond to those versions to run, not only the last one.
// eslint-disable-next-line default-case
switch (upgradeDB.oldVersion) {
case 0:
upgradeDB.createObjectStore(OBJECT_STORE_NAME);
}
});
}
return dbPromise;
}
/** Gets record(s) from the objectStore that match the given key. */
export async function get(appConfig: AppConfig): Promise<unknown> {
const key = getKey(appConfig);
const db = await getDbPromise();
return db
.transaction(OBJECT_STORE_NAME)
.objectStore(OBJECT_STORE_NAME)
.get(key);
}
/** Assigns or overwrites the record for the given key with the given value. */
export async function set<ValueType>(
appConfig: AppConfig,
value: ValueType
): Promise<ValueType> {
const key = getKey(appConfig);
const db = await getDbPromise();
const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');
await tx.objectStore(OBJECT_STORE_NAME).put(value, key);
await tx.complete;
return value;
}
/** Removes record(s) from the objectStore that match the given key. */
export async function remove(appConfig: AppConfig): Promise<void> {
const key = getKey(appConfig);
const db = await getDbPromise();
const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');
await tx.objectStore(OBJECT_STORE_NAME).delete(key);
await tx.complete;
}
/**
* Atomically updates a record with the result of updateFn, which gets
* called with the current value. If newValue is undefined, the record is
* deleted instead.
* @return Updated value
*/
export async function update<OldType, NewType>(
appConfig: AppConfig,
updateFn: (previousValue: OldType | undefined) => NewType
): Promise<NewType> {
const key = getKey(appConfig);
const db = await getDbPromise();
const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');
const store = tx.objectStore(OBJECT_STORE_NAME);
const oldValue = await store.get(key);
const newValue = updateFn(oldValue);
if (newValue === oldValue) {
return newValue;
}
if (newValue === undefined) {
await store.delete(key);
} else {
await store.put(newValue, key);
}
await tx.complete;
return newValue;
}
export async function clear(): Promise<void> {
const db = await getDbPromise();
const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');
await tx.objectStore(OBJECT_STORE_NAME).clear();
await tx.complete;
}
function getKey(appConfig: AppConfig): string {
return `${appConfig.appName}!${appConfig.appId}`;
}
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