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author | Florian Dold <florian.dold@gmail.com> | 2019-06-15 22:44:54 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2019-06-15 22:44:54 +0200 |
commit | 2ee9431f1ba5bf67546bbf85758a01991c40673f (patch) | |
tree | 4581c4f3c966d742c66ea7f4bae4f9a3f8e2f5ff /packages/idb-bridge/src/BridgeIDBDatabase.ts | |
parent | 65eb8b96f894491d406f91070df53ccbd43d19c9 (diff) | |
download | wallet-core-2ee9431f1ba5bf67546bbf85758a01991c40673f.tar.xz |
idb wip
Diffstat (limited to 'packages/idb-bridge/src/BridgeIDBDatabase.ts')
-rw-r--r-- | packages/idb-bridge/src/BridgeIDBDatabase.ts | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/packages/idb-bridge/src/BridgeIDBDatabase.ts b/packages/idb-bridge/src/BridgeIDBDatabase.ts new file mode 100644 index 000000000..cff2fd6e3 --- /dev/null +++ b/packages/idb-bridge/src/BridgeIDBDatabase.ts @@ -0,0 +1,239 @@ +/* + * Copyright 2017 Jeremy Scheff + * + * 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 BridgeIDBTransaction from "./BridgeIDBTransaction"; +import { + ConstraintError, + InvalidAccessError, + InvalidStateError, + NotFoundError, + TransactionInactiveError, +} from "./util/errors"; +import fakeDOMStringList from "./util/fakeDOMStringList"; +import FakeEventTarget from "./util/FakeEventTarget"; +import { FakeDOMStringList, KeyPath, TransactionMode } from "./util/types"; +import validateKeyPath from "./util/validateKeyPath"; +import queueTask from "./util/queueTask"; +import { + Backend, + DatabaseConnection, + Schema, + DatabaseTransaction, +} from "./backend-interface"; + +/** + * Ensure that an active version change transaction is currently running. + */ +const confirmActiveVersionchangeTransaction = (database: BridgeIDBDatabase) => { + if (!database._runningVersionchangeTransaction) { + throw new InvalidStateError(); + } + + // Find the latest versionchange transaction + const transactions = database._transactions.filter( + (tx: BridgeIDBTransaction) => { + return tx.mode === "versionchange"; + }, + ); + const transaction = transactions[transactions.length - 1]; + + if (!transaction || transaction._state === "finished") { + throw new InvalidStateError(); + } + + if (transaction._state !== "active") { + throw new TransactionInactiveError(); + } + + return transaction; +}; + + +// http://www.w3.org/TR/2015/REC-IndexedDB-20150108/#database-interface +class BridgeIDBDatabase extends FakeEventTarget { + _closePending = false; + _closed = false; + _runningVersionchangeTransaction = false; + _transactions: Array<BridgeIDBTransaction> = []; + + _backendConnection: DatabaseConnection; + _backend: Backend; + + _schema: Schema; + + get name(): string { + return this._schema.databaseName; + } + + get version(): number { + return this._schema.databaseVersion; + } + + get objectStoreNames(): FakeDOMStringList { + return fakeDOMStringList(Object.keys(this._schema.objectStores)).sort(); + } + + /** + * http://www.w3.org/TR/2015/REC-IndexedDB-20150108/#database-closing-steps + */ + _closeConnection() { + this._closePending = true; + + const transactionsComplete = this._transactions.every( + (transaction: BridgeIDBTransaction) => { + return transaction._state === "finished"; + }, + ); + + if (transactionsComplete) { + this._closed = true; + this._backend.close(this._backendConnection); + } else { + queueTask(() => { + this._closeConnection(); + }); + } + } + + constructor(backend: Backend, backendConnection: DatabaseConnection) { + super(); + + this._schema = backend.getSchema(backendConnection); + + this._backend = backend; + this._backendConnection = backendConnection; + } + + // http://w3c.github.io/IndexedDB/#dom-idbdatabase-createobjectstore + public createObjectStore( + name: string, + options: { autoIncrement?: boolean; keyPath?: KeyPath } | null = {}, + ) { + if (name === undefined) { + throw new TypeError(); + } + const transaction = confirmActiveVersionchangeTransaction(this); + const backendTx = transaction._backendTransaction; + if (!backendTx) { + throw Error("invariant violated"); + } + + const keyPath = + options !== null && options.keyPath !== undefined + ? options.keyPath + : null; + const autoIncrement = + options !== null && options.autoIncrement !== undefined + ? options.autoIncrement + : false; + + if (keyPath !== null) { + validateKeyPath(keyPath); + } + + if (!Object.keys(this._schema.objectStores).includes(name)) { + throw new ConstraintError(); + } + + if (autoIncrement && (keyPath === "" || Array.isArray(keyPath))) { + throw new InvalidAccessError(); + } + + transaction._backend.createObjectStore(backendTx, name, keyPath, autoIncrement); + + this._schema = this._backend.getSchema(this._backendConnection); + + return transaction.objectStore("name"); + } + + public deleteObjectStore(name: string): void { + if (name === undefined) { + throw new TypeError(); + } + const transaction = confirmActiveVersionchangeTransaction(this); + transaction._objectStoresCache.delete(name); + } + + public _internalTransaction( + storeNames: string | string[], + mode?: TransactionMode, + backendTransaction?: DatabaseTransaction, + ): BridgeIDBTransaction { + mode = mode !== undefined ? mode : "readonly"; + if ( + mode !== "readonly" && + mode !== "readwrite" && + mode !== "versionchange" + ) { + throw new TypeError("Invalid mode: " + mode); + } + + const hasActiveVersionchange = this._transactions.some( + (transaction: BridgeIDBTransaction) => { + return ( + transaction._state === "active" && + transaction.mode === "versionchange" && + transaction.db === this + ); + }, + ); + if (hasActiveVersionchange) { + throw new InvalidStateError(); + } + + if (this._closePending) { + throw new InvalidStateError(); + } + + if (!Array.isArray(storeNames)) { + storeNames = [storeNames]; + } + if (storeNames.length === 0 && mode !== "versionchange") { + throw new InvalidAccessError(); + } + for (const storeName of storeNames) { + if (this.objectStoreNames.indexOf(storeName) < 0) { + throw new NotFoundError( + "No objectStore named " + storeName + " in this database", + ); + } + } + + const tx = new BridgeIDBTransaction(storeNames, mode, this, backendTransaction); + this._transactions.push(tx); + return tx; + } + + public transaction( + storeNames: string | string[], + mode?: TransactionMode, + ): BridgeIDBTransaction { + if (mode === "versionchange") { + throw new TypeError("Invalid mode: " + mode); + } + return this._internalTransaction(storeNames, mode); + } + + public close() { + this._closeConnection(); + } + + public toString() { + return "[object IDBDatabase]"; + } +} + +export default BridgeIDBDatabase; |