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docs/backend_api/becca_entities_bnote_revision.js.html
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docs/backend_api/becca_entities_bnote_revision.js.html
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<!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: becca/entities/bnote_revision.js</title>
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<script src="scripts/prettify/prettify.js"> </script>
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<script src="scripts/prettify/lang-css.js"> </script>
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<!--[if lt IE 9]>
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<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
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<![endif]-->
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<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
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<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
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</head>
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<body>
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<div id="main">
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<h1 class="page-title">Source: becca/entities/bnote_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 protectedSessionService = require('../../services/protected_session');
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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 becca = require('../becca');
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const entityChangesService = require('../../services/entity_changes');
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const AbstractBeccaEntity = require("./abstract_becca_entity");
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/**
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* NoteRevision represents snapshot of note's title and content at some point in the past.
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* It's used for seamless note versioning.
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*
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* @extends AbstractBeccaEntity
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*/
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class BNoteRevision extends AbstractBeccaEntity {
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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", "isProtected", "dateLastEdited", "dateCreated", "utcDateLastEdited", "utcDateCreated", "utcDateModified"]; }
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constructor(row, titleDecrypted = false) {
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super();
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/** @type {string} */
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this.noteRevisionId = row.noteRevisionId;
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/** @type {string} */
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this.noteId = row.noteId;
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/** @type {string} */
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this.type = row.type;
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/** @type {string} */
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this.mime = row.mime;
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/** @type {boolean} */
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this.isProtected = !!row.isProtected;
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/** @type {string} */
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this.title = row.title;
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/** @type {string} */
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this.dateLastEdited = row.dateLastEdited;
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/** @type {string} */
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this.dateCreated = row.dateCreated;
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/** @type {string} */
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this.utcDateLastEdited = row.utcDateLastEdited;
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/** @type {string} */
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this.utcDateCreated = row.utcDateCreated;
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/** @type {string} */
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this.utcDateModified = row.utcDateModified;
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/** @type {number} */
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this.contentLength = row.contentLength;
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if (this.isProtected && !titleDecrypted) {
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this.title = protectedSessionService.isProtectedSessionAvailable()
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? protectedSessionService.decryptString(this.title)
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: "[protected]";
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}
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}
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getNote() {
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return becca.notes[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 its 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 {*} */
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getContent(silentNotFoundError = false) {
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const res = sql.getRow(`SELECT content 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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let content = res.content;
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if (this.isProtected) {
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if (protectedSessionService.isProtectedSessionAvailable()) {
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content = protectedSessionService.decrypt(content);
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}
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else {
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content = "";
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}
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}
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if (this.isStringNote()) {
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return content === null
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? ""
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: content.toString("UTF-8");
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}
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else {
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return content;
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}
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}
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setContent(content, ignoreMissingProtectedSession = false) {
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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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};
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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 if (!ignoreMissingProtectedSession) {
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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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sql.upsert("note_revision_contents", "noteRevisionId", pojo);
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const hash = utils.hash(`${this.noteRevisionId}|${pojo.content.toString()}`);
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entityChangesService.addEntityChange({
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entityName: 'note_revision_contents',
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entityId: this.noteRevisionId,
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hash: hash,
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isErased: false,
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utcDateChanged: this.getUtcDateChanged(),
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isSynced: true
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});
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}
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/** @returns {{contentLength, dateModified, utcDateModified}} */
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getContentMetadata() {
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return sql.getRow(`
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SELECT
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LENGTH(content) AS contentLength,
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dateModified,
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utcDateModified
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FROM note_revision_contents
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WHERE noteRevisionId = ?`, [this.noteRevisionId]);
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}
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beforeSaving() {
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super.beforeSaving();
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this.utcDateModified = dateUtils.utcNowDateTime();
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}
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getPojo() {
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return {
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noteRevisionId: this.noteRevisionId,
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noteId: this.noteId,
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type: this.type,
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mime: this.mime,
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isProtected: this.isProtected,
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title: this.title,
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dateLastEdited: this.dateLastEdited,
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dateCreated: this.dateCreated,
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utcDateLastEdited: this.utcDateLastEdited,
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utcDateCreated: this.utcDateCreated,
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utcDateModified: this.utcDateModified,
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content: this.content,
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contentLength: this.contentLength
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};
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}
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getPojoToSave() {
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const pojo = this.getPojo();
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delete pojo.content; // not getting persisted
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delete pojo.contentLength; // not getting persisted
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if (pojo.isProtected) {
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if (protectedSessionService.isProtectedSessionAvailable()) {
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pojo.title = protectedSessionService.encrypt(this.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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return pojo;
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}
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}
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module.exports = BNoteRevision;
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</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>Modules</h3><ul><li><a href="module-sql.html">sql</a></li></ul><h3>Classes</h3><ul><li><a href="AbstractBeccaEntity.html">AbstractBeccaEntity</a></li><li><a href="BAttribute.html">BAttribute</a></li><li><a href="BBranch.html">BBranch</a></li><li><a href="BEtapiToken.html">BEtapiToken</a></li><li><a href="BNote.html">BNote</a></li><li><a href="BNoteRevision.html">BNoteRevision</a></li><li><a href="BOption.html">BOption</a></li><li><a href="BRecentNote.html">BRecentNote</a></li><li><a href="BackendScriptApi.html">BackendScriptApi</a></li></ul><h3><a href="global.html">Global</a></h3>
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</nav>
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<br class="clear">
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<footer>
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Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 4.0.0</a>
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</footer>
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<script> prettyPrint(); </script>
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<script src="scripts/linenumber.js"> </script>
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</body>
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</html>
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