44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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export class Store {
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constructor(storeValue, writable) {
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this._storeValue = storeValue;
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this._writable = writable;
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}
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// makes a copy deep enough that any modifications in the store
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// won't affect the original
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// used for transactions
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cloneStoreValue() {
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// assumes 1 level deep is enough, and that values will be replaced
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// rather than updated.
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if (Array.isArray(this._storeValue)) {
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return this._storeValue.slice();
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} else if (typeof this._storeValue === "object") {
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return Object.assign({}, this._storeValue);
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} else {
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return this._storeValue;
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}
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}
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assertWritable() {
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if (!this._writable) {
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throw new Error("Tried to write in read-only transaction");
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}
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}
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}
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