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	# Conflicts: # docs/backend_api/BNote.html # docs/backend_api/BackendScriptApi.html # docs/backend_api/services_backend_script_api.js.html # docs/frontend_api/FAttribute.html # docs/frontend_api/FBranch.html # docs/frontend_api/FNote.html # docs/frontend_api/FrontendScriptApi.html # docs/frontend_api/entities_fattachment.js.html # docs/frontend_api/entities_fattribute.js.html # docs/frontend_api/entities_fblob.js.html # docs/frontend_api/entities_fbranch.js.html # docs/frontend_api/entities_fnote.js.html # docs/frontend_api/global.html # docs/frontend_api/index.html # docs/frontend_api/services_frontend_script_api.js.html # package.json # src/services/backend_script_api.js # src/services/build.js
		
			
				
	
	
		
			260 lines
		
	
	
		
			8.5 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
			
		
		
	
	
			260 lines
		
	
	
		
			8.5 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: becca/entities/brevision.js</title>
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<div id="main">
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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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    /**
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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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    /**
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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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    /** @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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        // 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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    }
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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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</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="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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