77 lines
1.9 KiB
JavaScript
77 lines
1.9 KiB
JavaScript
/* Copyright 2025 Mozilla Foundation
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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import { getUuid } from "pdfjs-lib";
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class SignatureStorage {
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// TODO: Encrypt the data in using a password and add a UI for entering it.
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// We could use the Web Crypto API for this (see https://bradyjoslin.com/blog/encryption-webcrypto/
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// for an example).
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#signatures = null;
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#save() {
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localStorage.setItem("pdfjs.signature", JSON.stringify(this.#signatures));
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}
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async getAll() {
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if (!this.#signatures) {
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const data = localStorage.getItem("pdfjs.signature");
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this.#signatures = data ? JSON.parse(data) : Object.create(null);
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}
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return this.#signatures;
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}
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async isFull() {
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return Object.keys(await this.getAll()).length === 5;
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}
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async create(data) {
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if (await this.isFull()) {
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return null;
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}
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const uuid = getUuid();
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this.#signatures[uuid] = data;
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this.#save();
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return uuid;
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}
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async delete(uuid) {
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const signatures = await this.getAll();
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if (!signatures[uuid]) {
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return false;
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}
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delete signatures[uuid];
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this.#save();
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return true;
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}
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async update(uuid, data) {
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const signatures = await this.getAll();
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const oldData = signatures[uuid];
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if (!oldData) {
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return false;
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}
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Object.assign(oldData, data);
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this.#save();
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return true;
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}
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}
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export { SignatureStorage };
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