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