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			295 lines
		
	
	
		
			9.6 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
			
		
		
	
	
			295 lines
		
	
	
		
			9.6 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
<!DOCTYPE html>
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    <title>JSDoc: Source: becca/entities/battachment.js</title>
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    <h1 class="page-title">Source: becca/entities/battachment.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 utils = require('../../services/utils');
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const dateUtils = require('../../services/date_utils');
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const AbstractBeccaEntity = require("./abstract_becca_entity");
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const sql = require("../../services/sql");
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const protectedSessionService = require("../../services/protected_session");
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const log = require("../../services/log");
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const attachmentRoleToNoteTypeMapping = {
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    'image': 'image'
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};
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/**
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 * Attachment represent data related/attached to the note. Conceptually similar to attributes, but intended for
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 * larger amounts of data and generally not accessible to the user.
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 *
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 * @extends AbstractBeccaEntity
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 */
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class BAttachment extends AbstractBeccaEntity {
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    static get entityName() { return "attachments"; }
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    static get primaryKeyName() { return "attachmentId"; }
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    static get hashedProperties() { return ["attachmentId", "ownerId", "role", "mime", "title", "blobId", "utcDateScheduledForErasureSince"]; }
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    constructor(row) {
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        super();
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        if (!row.ownerId?.trim()) {
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            throw new Error("'ownerId' must be given to initialize a Attachment entity");
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        } else if (!row.role?.trim()) {
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            throw new Error("'role' must be given to initialize a Attachment entity");
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        } else if (!row.mime?.trim()) {
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            throw new Error("'mime' must be given to initialize a Attachment entity");
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        } else if (!row.title?.trim()) {
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            throw new Error("'title' must be given to initialize a Attachment entity");
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        }
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        /** @type {string} */
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        this.attachmentId = row.attachmentId;
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        /** 
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         * either noteId or revisionId to which this attachment belongs
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         * @type {string}
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         */
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        this.ownerId = row.ownerId;
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        /** @type {string} */
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        this.role = row.role;
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        /** @type {string} */
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        this.mime = row.mime;
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        /** @type {string} */
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        this.title = row.title;
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        /** @type {int} */
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        this.position = row.position;
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        /** @type {string} */
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        this.blobId = row.blobId;
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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.dateModified = row.dateModified;
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        /** @type {string} */
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        this.utcDateModified = row.utcDateModified;
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        /** @type {string} */
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        this.utcDateScheduledForErasureSince = row.utcDateScheduledForErasureSince;
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        /**
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         * optionally added to the entity
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         * @type {int}
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         */
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        this.contentLength = row.contentLength;
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        this.decrypt();
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    }
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    /** @returns {BAttachment} */
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    copy() {
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        return new BAttachment({
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            ownerId: this.ownerId,
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            role: this.role,
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            mime: this.mime,
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            title: this.title,
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            blobId: this.blobId,
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            isProtected: this.isProtected
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        });
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    }
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    /** @returns {BNote} */
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    getNote() {
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        return this.becca.notes[this.ownerId];
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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.attachmentId // new attachment 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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    getTitleOrProtected() {
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        return this.isContentAvailable() ? this.title : '[protected]';
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    }
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    decrypt() {
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        if (!this.isProtected || !this.attachmentId) {
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            this.isDecrypted = true;
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            return;
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        }
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        if (!this.isDecrypted && protectedSessionService.isProtectedSessionAvailable()) {
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            try {
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                this.title = protectedSessionService.decryptString(this.title);
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                this.isDecrypted = true;
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            }
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            catch (e) {
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                log.error(`Could not decrypt attachment ${this.attachmentId}: ${e.message} ${e.stack}`);
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            }
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        }
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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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     * @param content
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     * @param {object} [opts]
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     * @param {object} [opts.forceSave=false] - will also save this BAttachment entity
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     * @param {object} [opts.forceFrontendReload=false] - override frontend heuristics on when to reload, instruct to reload
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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 {{note: BNote, branch: BBranch}} */
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    convertToNote() {
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        if (this.type === 'search') {
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            throw new Error(`Note of type search cannot have child notes`);
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        }
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        if (!this.getNote()) {
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            throw new Error("Cannot find note of this attachment. It is possible that this is note revision's attachment. " +
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                "Converting note revision's attachments to note is not (yet) supported.");
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        }
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        if (!(this.role in attachmentRoleToNoteTypeMapping)) {
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            throw new Error(`Mapping from attachment role '${this.role}' to note's type is not defined`);
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        }
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        if (!this.isContentAvailable()) { // isProtected is the same for attachment
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            throw new Error(`Cannot convert protected attachment outside of protected session`);
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        }
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        const noteService = require('../../services/notes');
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        const { note, branch } = noteService.createNewNote({
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            parentNoteId: this.ownerId,
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            title: this.title,
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            type: attachmentRoleToNoteTypeMapping[this.role],
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            mime: this.mime,
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            content: this.getContent(),
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            isProtected: this.isProtected
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        });
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        this.markAsDeleted();
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        const parentNote = this.getNote();
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        if (this.role === 'image' && parentNote.type === 'text') {
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            const origContent = parentNote.getContent();
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            const oldAttachmentUrl = `api/attachments/${this.attachmentId}/image/`;
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            const newNoteUrl = `api/images/${note.noteId}/`;
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            const fixedContent = utils.replaceAll(origContent, oldAttachmentUrl, newNoteUrl);
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            if (fixedContent !== origContent) {
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                parentNote.setContent(fixedContent);
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            }
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            noteService.asyncPostProcessContent(note, fixedContent);
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        }
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        return { note, branch };
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    }
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    getFileName() {
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        const type = this.role === 'image' ? 'image' : 'file';
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        return utils.formatDownloadTitle(this.title, type, this.mime);
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    }
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    beforeSaving() {
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        super.beforeSaving();
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        if (this.position === undefined || this.position === null) {
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            this.position = 10 + sql.getValue(`SELECT COALESCE(MAX(position), 0)
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                                              FROM attachments
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                                              WHERE ownerId = ?`, [this.noteId]);
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        }
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        this.dateModified = dateUtils.localNowDateTime();
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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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            attachmentId: this.attachmentId,
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            ownerId: this.ownerId,
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            role: this.role,
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            mime: this.mime,
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            title: this.title,
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            position: this.position,
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            blobId: this.blobId,
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            isProtected: !!this.isProtected,
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            isDeleted: false,
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            dateModified: this.dateModified,
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            utcDateModified: this.utcDateModified,
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            utcDateScheduledForErasureSince: this.utcDateScheduledForErasureSince,
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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.contentLength;
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        if (pojo.isProtected) {
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            if (this.isDecrypted) {
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                pojo.title = protectedSessionService.encrypt(pojo.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 = BAttachment;
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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><h3>Global</h3><ul><li><a href="global.html#api">api</a></li></ul>
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