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hydrogen-web/src/matrix/storage/idb/Storage.js

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import {Transaction} from "./Transaction.js";
import { STORE_NAMES, StorageError } from "../common.js";
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export class Storage {
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constructor(idbDatabase) {
this._db = idbDatabase;
const nameMap = STORE_NAMES.reduce((nameMap, name) => {
nameMap[name] = name;
return nameMap;
}, {});
this.storeNames = Object.freeze(nameMap);
}
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_validateStoreNames(storeNames) {
const idx = storeNames.findIndex(name => !STORE_NAMES.includes(name));
if (idx !== -1) {
throw new StorageError(`Tried top, a transaction unknown store ${storeNames[idx]}`);
}
}
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async readTxn(storeNames) {
this._validateStoreNames(storeNames);
try {
const txn = this._db.transaction(storeNames, "readonly");
return new Transaction(txn, storeNames);
} catch(err) {
throw new StorageError("readTxn failed", err);
}
}
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async readWriteTxn(storeNames) {
this._validateStoreNames(storeNames);
try {
const txn = this._db.transaction(storeNames, "readwrite");
return new Transaction(txn, storeNames);
} catch(err) {
throw new StorageError("readWriteTxn failed", err);
}
}
close() {
this._db.close();
}
}