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209 lines
6.8 KiB
HTML
209 lines
6.8 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>JSDoc: Source: entities/note_revision.js</title>
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<h1 class="page-title">Source: entities/note_revision.js</h1>
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<section>
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<article>
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<pre class="prettyprint source linenums"><code>"use strict";
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const Entity = require('./entity');
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const protectedSessionService = require('../services/protected_session');
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const repository = require('../services/repository');
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const utils = require('../services/utils');
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const sql = require('../services/sql');
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const dateUtils = require('../services/date_utils');
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const syncTableService = require('../services/sync_table');
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/**
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* NoteRevision represents snapshot of note's title and content at some point in the past. It's used for seamless note versioning.
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*
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* @property {string} noteRevisionId
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* @property {string} noteId
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* @property {string} type
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* @property {string} mime
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* @property {string} title
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* @property {int} contentLength
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* @property {boolean} isErased
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* @property {boolean} isProtected
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* @property {string} dateLastEdited
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* @property {string} dateCreated
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* @property {string} utcDateLastEdited
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* @property {string} utcDateCreated
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* @property {string} utcDateModified
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*
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* @extends Entity
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*/
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class NoteRevision extends Entity {
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static get entityName() { return "note_revisions"; }
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static get primaryKeyName() { return "noteRevisionId"; }
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static get hashedProperties() { return ["noteRevisionId", "noteId", "title", "contentLength", "isErased", "isProtected", "dateLastEdited", "dateCreated", "utcDateLastEdited", "utcDateCreated", "utcDateModified"]; }
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constructor(row) {
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super(row);
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this.isProtected = !!this.isProtected;
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if (this.isProtected) {
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if (protectedSessionService.isProtectedSessionAvailable()) {
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this.title = protectedSessionService.decryptString(this.title);
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}
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else {
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this.title = "[Protected]";
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}
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}
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}
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async getNote() {
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return await repository.getNote(this.noteId);
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}
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/** @returns {boolean} true if the note has string content (not binary) */
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isStringNote() {
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return utils.isStringNote(this.type, this.mime);
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}
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/*
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* Note revision content has quite special handling - it's not a separate entity, but a lazily loaded
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* part of NoteRevision entity with it's own sync. Reason behind this hybrid design is that
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* content can be quite large and it's not necessary to load it / fill memory for any note access even
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* if we don't need a content, especially for bulk operations like search.
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*
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* This is the same approach as is used for Note's content.
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*/
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/** @returns {Promise<*>} */
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async getContent(silentNotFoundError = false) {
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if (this.content === undefined) {
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const res = await sql.getRow(`SELECT content, hash FROM note_revision_contents WHERE noteRevisionId = ?`, [this.noteRevisionId]);
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if (!res) {
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if (silentNotFoundError) {
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return undefined;
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}
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else {
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throw new Error("Cannot find note revision content for noteRevisionId=" + this.noteRevisionId);
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}
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}
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this.content = res.content;
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if (this.isProtected) {
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if (protectedSessionService.isProtectedSessionAvailable()) {
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this.content = protectedSessionService.decrypt(this.content);
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}
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else {
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this.content = "";
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}
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}
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}
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if (this.isStringNote()) {
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return this.content === null
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? ""
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: this.content.toString("UTF-8");
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}
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else {
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return this.content;
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}
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}
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/** @returns {Promise} */
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async setContent(content) {
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// force updating note itself so that utcDateModified is represented correctly even for the content
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this.forcedChange = true;
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this.contentLength = content === null ? 0 : content.length;
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await this.save();
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this.content = content;
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const pojo = {
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noteRevisionId: this.noteRevisionId,
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content: content,
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utcDateModified: dateUtils.utcNowDateTime(),
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hash: utils.hash(this.noteRevisionId + "|" + content)
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};
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if (this.isProtected) {
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if (protectedSessionService.isProtectedSessionAvailable()) {
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pojo.content = protectedSessionService.encrypt(pojo.content);
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}
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else {
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throw new Error(`Cannot update content of noteRevisionId=${this.noteRevisionId} since we're out of protected session.`);
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}
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}
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await sql.upsert("note_revision_contents", "noteRevisionId", pojo);
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await syncTableService.addNoteRevisionContentSync(this.noteRevisionId);
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}
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beforeSaving() {
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super.beforeSaving();
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if (this.isChanged) {
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this.utcDateModified = dateUtils.utcNowDateTime();
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}
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}
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// cannot be static!
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updatePojo(pojo) {
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if (pojo.isProtected) {
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if (protectedSessionService.isProtectedSessionAvailable()) {
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pojo.title = protectedSessionService.encrypt(pojo.title);
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}
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else {
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// updating protected note outside of protected session means we will keep original ciphertexts
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delete pojo.title;
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}
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}
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delete pojo.content;
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}
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}
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module.exports = NoteRevision;</code></pre>
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</article>
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</section>
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</div>
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<nav>
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<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="ApiToken.html">ApiToken</a></li><li><a href="Attribute.html">Attribute</a></li><li><a href="BackendScriptApi.html">BackendScriptApi</a></li><li><a href="Branch.html">Branch</a></li><li><a href="Entity.html">Entity</a></li><li><a href="Note.html">Note</a></li><li><a href="NoteRevision.html">NoteRevision</a></li><li><a href="Option.html">Option</a></li><li><a href="RecentNote.html">RecentNote</a></li></ul><h3><a href="global.html">Global</a></h3>
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