2023-09-06 09:23:13 +02:00
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<title>JSDoc: Source: becca/entities/brevision.js</title>
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<h1 class="page-title">Source: becca/entities/brevision.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 dateUtils = require('../../services/date_utils');
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const becca = require('../becca');
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const AbstractBeccaEntity = require("./abstract_becca_entity");
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const sql = require("../../services/sql");
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const BAttachment = require("./battachment");
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/**
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* Revision represents a 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 BRevision extends AbstractBeccaEntity {
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static get entityName() { return "revisions"; }
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static get primaryKeyName() { return "revisionId"; }
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static get hashedProperties() { return ["revisionId", "noteId", "title", "isProtected", "dateLastEdited", "dateCreated",
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"utcDateLastEdited", "utcDateCreated", "utcDateModified", "blobId"]; }
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constructor(row, titleDecrypted = false) {
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super();
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/** @type {string} */
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this.revisionId = row.revisionId;
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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.blobId = row.blobId;
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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 {int} */
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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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hasStringContent() {
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return utils.isStringNote(this.type, this.mime);
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}
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isContentAvailable() {
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return !this.revisionId // new note which was not encrypted yet
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|| !this.isProtected
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|| protectedSessionService.isProtectedSessionAvailable()
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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 Revision entity with its own sync. The 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 {string|Buffer} */
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getContent() {
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return this._getContent();
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}
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2023-10-19 00:29:03 +02:00
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/**
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* @returns {*}
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* @throws Error in case of invalid JSON */
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getJsonContent() {
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const content = this.getContent();
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if (!content || !content.trim()) {
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return null;
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}
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return JSON.parse(content);
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}
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/** @returns {*|null} valid object or null if the content cannot be parsed as JSON */
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getJsonContentSafely() {
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try {
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return this.getJsonContent();
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}
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catch (e) {
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return null;
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}
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}
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2023-09-06 09:23:13 +02:00
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/**
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* @param content
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* @param {object} [opts]
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* @param {object} [opts.forceSave=false] - will also save this BRevision entity
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*/
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setContent(content, opts) {
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this._setContent(content, opts);
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}
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/** @returns {BAttachment[]} */
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getAttachments() {
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return sql.getRows(`
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SELECT attachments.*
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FROM attachments
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WHERE ownerId = ?
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AND isDeleted = 0`, [this.revisionId])
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.map(row => new BAttachment(row));
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}
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2023-10-19 00:29:03 +02:00
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/** @returns {BAttachment|null} */
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getAttachmentById(attachmentId, opts = {}) {
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opts.includeContentLength = !!opts.includeContentLength;
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const query = opts.includeContentLength
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? `SELECT attachments.*, LENGTH(blobs.content) AS contentLength
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FROM attachments
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JOIN blobs USING (blobId)
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WHERE ownerId = ? AND attachmentId = ? AND isDeleted = 0`
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: `SELECT * FROM attachments WHERE ownerId = ? AND attachmentId = ? AND isDeleted = 0`;
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return sql.getRows(query, [this.revisionId, attachmentId])
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.map(row => new BAttachment(row))[0];
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}
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/** @returns {BAttachment[]} */
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getAttachmentsByRole(role) {
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return sql.getRows(`
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SELECT attachments.*
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FROM attachments
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WHERE ownerId = ?
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AND role = ?
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AND isDeleted = 0
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ORDER BY position`, [this.revisionId, role])
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.map(row => new BAttachment(row));
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}
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/** @returns {BAttachment} */
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getAttachmentByTitle(title) {
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2023-11-20 23:14:53 +01:00
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// cannot use SQL to filter by title since it can be encrypted
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return this.getAttachments().filter(attachment => attachment.title === title)[0];
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2023-10-19 00:29:03 +02:00
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}
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2023-09-06 09:23:13 +02:00
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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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revisionId: this.revisionId,
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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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blobId: this.blobId,
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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, // used when retrieving full note revision to frontend
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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 = BRevision;
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</code></pre>
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</article>
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</section>
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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="BAttachment.html">BAttachment</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="BOption.html">BOption</a></li><li><a href="BRecentNote.html">BRecentNote</a></li><li><a href="BRevision.html">BRevision</a></li><li><a href="BackendScriptApi.html">BackendScriptApi</a></li></ul>
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