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<h1 class="page-title">Source: becca/entities/brevision.js</h1>
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<pre class="prettyprint source linenums"><code>"use strict";
const protectedSessionService = require('../../services/protected_session');
const utils = require('../../services/utils');
const dateUtils = require('../../services/date_utils');
const becca = require('../becca');
const AbstractBeccaEntity = require("./abstract_becca_entity");
const sql = require("../../services/sql");
const BAttachment = require("./battachment");
/**
* Revision represents a snapshot of note's title and content at some point in the past.
* It's used for seamless note versioning.
*
* @extends AbstractBeccaEntity
*/
class BRevision extends AbstractBeccaEntity {
static get entityName() { return "revisions"; }
static get primaryKeyName() { return "revisionId"; }
static get hashedProperties() { return ["revisionId", "noteId", "title", "isProtected", "dateLastEdited", "dateCreated",
"utcDateLastEdited", "utcDateCreated", "utcDateModified", "blobId"]; }
constructor(row, titleDecrypted = false) {
super();
/** @type {string} */
this.revisionId = row.revisionId;
/** @type {string} */
this.noteId = row.noteId;
/** @type {string} */
this.type = row.type;
/** @type {string} */
this.mime = row.mime;
/** @type {boolean} */
this.isProtected = !!row.isProtected;
/** @type {string} */
this.title = row.title;
/** @type {string} */
this.blobId = row.blobId;
/** @type {string} */
this.dateLastEdited = row.dateLastEdited;
/** @type {string} */
this.dateCreated = row.dateCreated;
/** @type {string} */
this.utcDateLastEdited = row.utcDateLastEdited;
/** @type {string} */
this.utcDateCreated = row.utcDateCreated;
/** @type {string} */
this.utcDateModified = row.utcDateModified;
/** @type {int} */
this.contentLength = row.contentLength;
if (this.isProtected && !titleDecrypted) {
this.title = protectedSessionService.isProtectedSessionAvailable()
? protectedSessionService.decryptString(this.title)
: "[protected]";
}
}
getNote() {
return becca.notes[this.noteId];
}
/** @returns {boolean} true if the note has string content (not binary) */
hasStringContent() {
return utils.isStringNote(this.type, this.mime);
}
isContentAvailable() {
return !this.revisionId // new note which was not encrypted yet
|| !this.isProtected
|| protectedSessionService.isProtectedSessionAvailable()
}
/*
* Note revision content has quite special handling - it's not a separate entity, but a lazily loaded
* part of Revision entity with its own sync. The 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 {string|Buffer} */
getContent() {
return this._getContent();
}
/**
* @returns {*}
* @throws Error in case of invalid JSON */
getJsonContent() {
const content = this.getContent();
if (!content || !content.trim()) {
return null;
}
return JSON.parse(content);
}
/** @returns {*|null} valid object or null if the content cannot be parsed as JSON */
getJsonContentSafely() {
try {
return this.getJsonContent();
}
catch (e) {
return null;
}
}
/**
* @param content
* @param {object} [opts]
* @param {object} [opts.forceSave=false] - will also save this BRevision entity
*/
setContent(content, opts) {
this._setContent(content, opts);
}
/** @returns {BAttachment[]} */
getAttachments() {
return sql.getRows(`
SELECT attachments.*
FROM attachments
WHERE ownerId = ?
AND isDeleted = 0`, [this.revisionId])
.map(row => new BAttachment(row));
}
/** @returns {BAttachment|null} */
getAttachmentById(attachmentId, opts = {}) {
opts.includeContentLength = !!opts.includeContentLength;
const query = opts.includeContentLength
? `SELECT attachments.*, LENGTH(blobs.content) AS contentLength
FROM attachments
JOIN blobs USING (blobId)
WHERE ownerId = ? AND attachmentId = ? AND isDeleted = 0`
: `SELECT * FROM attachments WHERE ownerId = ? AND attachmentId = ? AND isDeleted = 0`;
return sql.getRows(query, [this.revisionId, attachmentId])
.map(row => new BAttachment(row))[0];
}
/** @returns {BAttachment[]} */
getAttachmentsByRole(role) {
return sql.getRows(`
SELECT attachments.*
FROM attachments
WHERE ownerId = ?
AND role = ?
AND isDeleted = 0
ORDER BY position`, [this.revisionId, role])
.map(row => new BAttachment(row));
}
/** @returns {BAttachment} */
getAttachmentByTitle(title) {
return sql.getRows(`
SELECT attachments.*
FROM attachments
WHERE ownerId = ?
AND title = ?
AND isDeleted = 0
ORDER BY position`, [this.revisionId, title])
.map(row => new BAttachment(row))[0];
}
beforeSaving() {
super.beforeSaving();
this.utcDateModified = dateUtils.utcNowDateTime();
}
getPojo() {
return {
revisionId: this.revisionId,
noteId: this.noteId,
type: this.type,
mime: this.mime,
isProtected: this.isProtected,
title: this.title,
blobId: this.blobId,
dateLastEdited: this.dateLastEdited,
dateCreated: this.dateCreated,
utcDateLastEdited: this.utcDateLastEdited,
utcDateCreated: this.utcDateCreated,
utcDateModified: this.utcDateModified,
content: this.content, // used when retrieving full note revision to frontend
contentLength: this.contentLength
};
}
getPojoToSave() {
const pojo = this.getPojo();
delete pojo.content; // not getting persisted
delete pojo.contentLength; // not getting persisted
if (pojo.isProtected) {
if (protectedSessionService.isProtectedSessionAvailable()) {
pojo.title = protectedSessionService.encrypt(this.title);
}
else {
// updating protected note outside of protected session means we will keep original ciphertexts
delete pojo.title;
}
}
return pojo;
}
}
module.exports = BRevision;
</code></pre>
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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><h3>Global</h3><ul><li><a href="global.html#api">api</a></li></ul>
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