mirror of
https://github.com/hedgedoc/hedgedoc.git
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672 lines
22 KiB
TypeScript
672 lines
22 KiB
TypeScript
import async from 'async'
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import base64url from 'base64url'
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import cheerio from 'cheerio'
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// eslint-disable-next-line @typescript-eslint/camelcase
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import { diff_match_patch, patch_obj } from 'diff-match-patch'
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import fs from 'fs'
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import LZString from 'lz-string'
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import markdownIt from 'markdown-it'
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import metaMarked from 'meta-marked'
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import moment from 'moment'
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import path from 'path'
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import Sequelize from 'sequelize'
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import {
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AfterCreate,
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AllowNull,
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BeforeCreate,
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BelongsTo,
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Column,
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DataType,
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Default,
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ForeignKey,
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HasMany,
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Model,
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PrimaryKey,
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Table,
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Unique
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} from 'sequelize-typescript'
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import { generate as shortIdGenerate, isValid as shortIdIsValid } from 'shortid'
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import S from 'string'
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import { config } from '../config'
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import { logger } from '../logger'
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import ot from '../ot/index'
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import { processData, stripNullByte } from '../utils/functions'
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import { Author, Revision, User } from './index'
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const md = markdownIt()
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// eslint-disable-next-line new-cap
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const dmp = new diff_match_patch()
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// permission types
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enum PermissionEnum {
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freely = 'freely',
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editable = 'editable',
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limited = 'limited',
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locked = 'locked',
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protected = 'protected',
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private = 'private'
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}
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export class OpengraphMetadata {
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title: string | number
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description: string | number
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type: string
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}
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export class NoteMetadata {
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title: string
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description: string
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robots: string
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GA: string
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disqus: string
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slideOptions
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opengraph: OpengraphMetadata
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}
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export type NoteAuthorship = [string, number, number, number, number]
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@Table({ paranoid: false })
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export class Note extends Model<Note> {
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@PrimaryKey
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@Default(Sequelize.UUIDV4)
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@Column(DataType.UUID)
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id: string
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@AllowNull(false)
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@Default(shortIdGenerate)
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@Unique
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@Column(DataType.STRING)
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shortid: string
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@Unique
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@Column(DataType.STRING)
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alias: string
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@Column(DataType.ENUM({ values: Object.keys(PermissionEnum).map(k => PermissionEnum[k]) }))
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permission: PermissionEnum
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@AllowNull(false)
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@Default(0)
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@Column(DataType.INTEGER)
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viewcount: number
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// ToDo: use @UpdatedAt instead? (https://www.npmjs.com/package/sequelize-typescript#createdat--updatedat--deletedat)
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@Column(DataType.DATE)
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lastchangeAt: Date
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// ToDo: use @UpdatedAt instead? (https://www.npmjs.com/package/sequelize-typescript#createdat--updatedat--deletedat)
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@Column(DataType.DATE)
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savedAt: Date
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@ForeignKey(() => User)
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@Column
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ownerId: string
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@BelongsTo(() => User, { foreignKey: 'ownerId', constraints: false, onDelete: 'CASCADE', hooks: true })
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owner: User
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@ForeignKey(() => User)
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@Column
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lastchangeuserId: string
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@BelongsTo(() => User, { foreignKey: 'lastchangeuserId', constraints: false })
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lastchangeuser: User
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@HasMany(() => Revision, { foreignKey: 'noteId', constraints: false })
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revisions: Revision[]
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@HasMany(() => Author, { foreignKey: 'noteId', constraints: false })
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authors: Author[]
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@Column(DataType.TEXT)
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get title (): string {
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return this.getDataValue('title') ?? ''
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}
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set title (value: string) {
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this.setDataValue('title', stripNullByte(value))
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}
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@Column(DataType.TEXT({ length: 'long' }))
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get content (): string {
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return this.getDataValue('content') ?? ''
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}
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set content (value: string) {
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this.setDataValue('content', stripNullByte(value))
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}
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@Column(DataType.TEXT({ length: 'long' }))
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get authorship (): NoteAuthorship[] {
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return processData(this.getDataValue('authorship'), [], JSON.parse)
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}
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set authorship (value: NoteAuthorship[]) {
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// Evil hack for TypeScript to accept saving a string in a NoteAuthorship DB-field
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this.setDataValue('authorship', JSON.stringify(value) as unknown as NoteAuthorship[])
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}
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@BeforeCreate
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static async defaultContentAndPermissions (note: Note): Promise<Note> {
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return await new Promise(function (resolve) {
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// if no content specified then use default note
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if (!note.content) {
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let filePath: string
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if (!note.alias) {
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filePath = config.defaultNotePath
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} else {
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filePath = path.join(config.docsPath, note.alias + '.md')
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}
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if (Note.checkFileExist(filePath)) {
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const fsCreatedTime = moment(fs.statSync(filePath).ctime)
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const body = fs.readFileSync(filePath, 'utf8')
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note.title = Note.parseNoteTitle(body)
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note.content = body
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if (filePath !== config.defaultNotePath) {
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note.createdAt = fsCreatedTime
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}
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}
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}
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// if no permission specified and have owner then give default permission in config, else default permission is freely
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if (!note.permission) {
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if (note.ownerId) {
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// TODO: Might explode if the user-defined permission does not exist
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note.permission = PermissionEnum[config.defaultPermission]
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} else {
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note.permission = PermissionEnum.freely
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}
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}
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return resolve(note)
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})
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}
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@AfterCreate
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static saveRevision (note): Promise<Note> {
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return new Promise(function (resolve, reject) {
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Revision.saveNoteRevision(note, function (err, _) {
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if (err) {
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return reject(err)
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}
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return resolve(note)
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})
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})
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}
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static checkFileExist (filePath): boolean {
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try {
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return fs.statSync(filePath).isFile()
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} catch (err) {
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return false
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}
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}
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static encodeNoteId (id): string {
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// remove dashes in UUID and encode in url-safe base64
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const str = id.replace(/-/g, '')
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const hexStr = Buffer.from(str, 'hex')
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return base64url.encode(hexStr)
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}
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static decodeNoteId (encodedId): string {
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// decode from url-safe base64
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const id: string = base64url.toBuffer(encodedId).toString('hex')
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// add dashes between the UUID string parts
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const idParts: string[] = []
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idParts.push(id.substr(0, 8))
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idParts.push(id.substr(8, 4))
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idParts.push(id.substr(12, 4))
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idParts.push(id.substr(16, 4))
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idParts.push(id.substr(20, 12))
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return idParts.join('-')
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}
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static checkNoteIdValid (id): boolean {
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const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
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const result = id.match(uuidRegex)
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return !!(result && result.length === 1)
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}
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static parseNoteId (noteId, callback): void {
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async.series({
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parseNoteIdByAlias: function (_callback) {
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// try to parse note id by alias (e.g. doc)
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Note.findOne({
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where: {
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alias: noteId
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}
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}).then(function (note) {
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if (note) {
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const filePath = path.join(config.docsPath, noteId + '.md')
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if (Note.checkFileExist(filePath)) {
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// if doc in filesystem have newer modified time than last change time
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// then will update the doc in db
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const fsModifiedTime = moment(fs.statSync(filePath).mtime)
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const dbModifiedTime = moment(note.lastchangeAt || note.createdAt)
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const body = fs.readFileSync(filePath, 'utf8')
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const contentLength = body.length
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const title = Note.parseNoteTitle(body)
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if (fsModifiedTime.isAfter(dbModifiedTime) && note.content !== body) {
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note.update({
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title: title,
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content: body,
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lastchangeAt: fsModifiedTime
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}).then(function (note) {
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Revision.saveNoteRevision(note, function (err, revision) {
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if (err) return _callback(err, null)
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// update authorship on after making revision of docs
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const patch = dmp.patch_fromText(revision.patch)
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const operations = Note.transformPatchToOperations(patch, contentLength)
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let authorship = note.authorship
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for (let i = 0; i < operations.length; i++) {
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authorship = Note.updateAuthorshipByOperation(operations[i], null, authorship)
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}
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note.update({
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authorship: authorship
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}).then(function (note) {
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return callback(null, note.id)
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}).catch(function (err) {
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return _callback(err, null)
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})
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})
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}).catch(function (err) {
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return _callback(err, null)
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})
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} else {
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return callback(null, note.id)
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}
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} else {
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return callback(null, note.id)
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}
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} else {
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const filePath = path.join(config.docsPath, noteId + '.md')
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if (Note.checkFileExist(filePath)) {
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Note.create({
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alias: noteId,
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owner: null,
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permission: 'locked'
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}).then(function (note) {
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return callback(null, note.id)
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}).catch(function (err) {
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return _callback(err, null)
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})
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} else {
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return _callback(null, null)
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}
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}
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}).catch(function (err) {
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return _callback(err, null)
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})
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},
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// parse note id by LZString is deprecated, here for compability
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parseNoteIdByLZString: function (_callback) {
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// Calculate minimal string length for an UUID that is encoded
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// base64 encoded and optimize comparsion by using -1
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// this should make a lot of LZ-String parsing errors obsolete
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// as we can assume that a nodeId that is 48 chars or longer is a
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// noteID.
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const base64UuidLength = ((4 * 36) / 3) - 1
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if (!(noteId.length > base64UuidLength)) {
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return _callback(null, null)
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}
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// try to parse note id by LZString Base64
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try {
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const id = LZString.decompressFromBase64(noteId)
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if (id && Note.checkNoteIdValid(id)) {
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return callback(null, id)
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} else {
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return _callback(null, null)
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}
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} catch (err) {
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if (err.message === 'Cannot read property \'charAt\' of undefined') {
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logger.warning('Looks like we can not decode "' + noteId + '" with LZString. Can be ignored.')
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} else {
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logger.error(err)
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}
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return _callback(null, null)
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}
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},
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parseNoteIdByBase64Url: function (_callback) {
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// try to parse note id by base64url
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try {
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const id = Note.decodeNoteId(noteId)
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if (id && Note.checkNoteIdValid(id)) {
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return callback(null, id)
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} else {
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return _callback(null, null)
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}
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} catch (err) {
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logger.error(err)
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return _callback(null, null)
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}
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},
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parseNoteIdByShortId: function (_callback) {
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// try to parse note id by shortId
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try {
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if (shortIdIsValid(noteId)) {
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Note.findOne({
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where: {
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shortid: noteId
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}
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}).then(function (note) {
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if (!note) return _callback(null, null)
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return callback(null, note.id)
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}).catch(function (err) {
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return _callback(err, null)
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})
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} else {
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return _callback(null, null)
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}
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} catch (err) {
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return _callback(err, null)
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}
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}
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}, function (err, _) {
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if (err) {
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logger.error(err)
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return callback(err, null)
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}
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return callback(null, null)
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})
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}
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static parseNoteTitle (body): string {
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const parsed = Note.extractMeta(body)
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const $ = cheerio.load(md.render(parsed.markdown))
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return Note.extractNoteTitle(parsed.meta, $)
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}
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static extractNoteTitle (meta, $): string {
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let title = ''
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if (meta.title && (typeof meta.title === 'string' || typeof meta.title === 'number')) {
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title = meta.title
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} else {
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const h1s = $('h1')
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if (h1s.length > 0 && h1s.first().text().split('\n').length === 1) {
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title = S(h1s.first().text()).stripTags().s
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}
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}
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if (!title) title = 'Untitled'
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return title
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}
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static generateDescription (markdown): string {
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return markdown.substr(0, 100).replace(/(?:\r\n|\r|\n)/g, ' ')
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}
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static decodeTitle (title): string {
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return title || 'Untitled'
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}
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static generateWebTitle (title): string {
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title = !title || title === 'Untitled' ? 'CodiMD - Collaborative markdown notes' : title + ' - CodiMD'
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return title
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}
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static extractNoteTags (meta, $): string[] {
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const tags: string[] = []
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const rawtags: string[] = []
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if (meta.tags && (typeof meta.tags === 'string' || typeof meta.tags === 'number')) {
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const metaTags = ('' + meta.tags).split(',')
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for (let i = 0; i < metaTags.length; i++) {
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const text: string = metaTags[i].trim()
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if (text) rawtags.push(text)
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}
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} else {
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const h6s = $('h6')
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h6s.each(function (key, value) {
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if (/^tags/gmi.test($(value).text())) {
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const codes = $(value).find('code')
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for (let i = 0; i < codes.length; i++) {
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const text = S($(codes[i]).text().trim()).stripTags().s
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if (text) rawtags.push(text)
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}
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}
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})
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}
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for (let i = 0; i < rawtags.length; i++) {
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let found = false
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for (let j = 0; j < tags.length; j++) {
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if (tags[j] === rawtags[i]) {
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found = true
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break
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}
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}
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if (!found) {
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tags.push(rawtags[i])
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}
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}
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return tags
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}
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static extractMeta (content): { markdown: string; meta: {} } {
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try {
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const obj = metaMarked(content)
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if (!obj.markdown) obj.markdown = ''
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if (!obj.meta) obj.meta = {}
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return obj
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} catch (err) {
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return {
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markdown: content,
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meta: {}
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}
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}
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}
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static parseMeta (meta): NoteMetadata {
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const _meta = new NoteMetadata()
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if (meta) {
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if (meta.title && (typeof meta.title === 'string' || typeof meta.title === 'number')) {
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_meta.title = meta.title
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}
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if (meta.description && (typeof meta.description === 'string' || typeof meta.description === 'number')) {
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_meta.description = meta.description
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}
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if (meta.robots && (typeof meta.robots === 'string' || typeof meta.robots === 'number')) {
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_meta.robots = meta.robots
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}
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if (meta.GA && (typeof meta.GA === 'string' || typeof meta.GA === 'number')) {
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_meta.GA = meta.GA
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}
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if (meta.disqus && (typeof meta.disqus === 'string' || typeof meta.disqus === 'number')) {
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_meta.disqus = meta.disqus
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}
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if (meta.slideOptions && (typeof meta.slideOptions === 'object')) {
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_meta.slideOptions = meta.slideOptions
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}
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if (meta.opengraph && (typeof meta.opengraph === 'object')) {
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_meta.opengraph = meta.opengraph
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}
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}
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return _meta
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}
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static parseOpengraph (meta, title: string): OpengraphMetadata {
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let _ogdata = new OpengraphMetadata()
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if (meta.opengraph) {
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_ogdata = meta.opengraph
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}
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if (!(_ogdata.title && (typeof _ogdata.title === 'string' || typeof _ogdata.title === 'number'))) {
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_ogdata.title = title
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}
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if (!(_ogdata.description && (typeof _ogdata.description === 'string' || typeof _ogdata.description === 'number'))) {
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_ogdata.description = meta.description || ''
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}
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if (!(_ogdata.type && (typeof _ogdata.type === 'string'))) {
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_ogdata.type = 'website'
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}
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return _ogdata
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}
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static updateAuthorshipByOperation (operation, userId: string | null, authorships): NoteAuthorship[] {
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let index = 0
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const timestamp = Date.now()
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for (let i = 0; i < operation.length; i++) {
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const op = operation[i]
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if (ot.TextOperation.isRetain(op)) {
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index += op
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} else if (ot.TextOperation.isInsert(op)) {
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const opStart = index
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const opEnd = index + op.length
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let inserted = false
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// authorship format: [userId, startPos, endPos, createdAt, updatedAt]
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if (authorships.length <= 0) authorships.push([userId, opStart, opEnd, timestamp, timestamp])
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else {
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for (let j = 0; j < authorships.length; j++) {
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const authorship = authorships[j]
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if (!inserted) {
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const nextAuthorship = authorships[j + 1] || -1
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if ((nextAuthorship !== -1 && nextAuthorship[1] >= opEnd) || j >= authorships.length - 1) {
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if (authorship[1] < opStart && authorship[2] > opStart) {
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// divide
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const postLength = authorship[2] - opStart
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authorship[2] = opStart
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authorship[4] = timestamp
|
|
authorships.splice(j + 1, 0, [userId, opStart, opEnd, timestamp, timestamp])
|
|
authorships.splice(j + 2, 0, [authorship[0], opEnd, opEnd + postLength, authorship[3], timestamp])
|
|
j += 2
|
|
inserted = true
|
|
} else if (authorship[1] >= opStart) {
|
|
authorships.splice(j, 0, [userId, opStart, opEnd, timestamp, timestamp])
|
|
j += 1
|
|
inserted = true
|
|
} else if (authorship[2] <= opStart) {
|
|
authorships.splice(j + 1, 0, [userId, opStart, opEnd, timestamp, timestamp])
|
|
j += 1
|
|
inserted = true
|
|
}
|
|
}
|
|
}
|
|
if (authorship[1] >= opStart) {
|
|
authorship[1] += op.length
|
|
authorship[2] += op.length
|
|
}
|
|
}
|
|
}
|
|
index += op.length
|
|
} else if (ot.TextOperation.isDelete(op)) {
|
|
const opStart = index
|
|
const opEnd = index - op
|
|
if (operation.length === 1) {
|
|
authorships = []
|
|
} else if (authorships.length > 0) {
|
|
for (let j = 0; j < authorships.length; j++) {
|
|
const authorship = authorships[j]
|
|
if (authorship[1] >= opStart && authorship[1] <= opEnd && authorship[2] >= opStart && authorship[2] <= opEnd) {
|
|
authorships.splice(j, 1)
|
|
j -= 1
|
|
} else if (authorship[1] < opStart && authorship[1] < opEnd && authorship[2] > opStart && authorship[2] > opEnd) {
|
|
authorship[2] += op
|
|
authorship[4] = timestamp
|
|
} else if (authorship[2] >= opStart && authorship[2] <= opEnd) {
|
|
authorship[2] = opStart
|
|
authorship[4] = timestamp
|
|
} else if (authorship[1] >= opStart && authorship[1] <= opEnd) {
|
|
authorship[1] = opEnd
|
|
authorship[4] = timestamp
|
|
}
|
|
if (authorship[1] >= opEnd) {
|
|
authorship[1] += op
|
|
authorship[2] += op
|
|
}
|
|
}
|
|
}
|
|
index += op
|
|
}
|
|
}
|
|
// merge
|
|
for (let j = 0; j < authorships.length; j++) {
|
|
const authorship = authorships[j]
|
|
for (let k = j + 1; k < authorships.length; k++) {
|
|
const nextAuthorship = authorships[k]
|
|
if (nextAuthorship && authorship[0] === nextAuthorship[0] && authorship[2] === nextAuthorship[1]) {
|
|
const minTimestamp = Math.min(authorship[3], nextAuthorship[3])
|
|
const maxTimestamp = Math.max(authorship[3], nextAuthorship[3])
|
|
authorships.splice(j, 1, [authorship[0], authorship[1], nextAuthorship[2], minTimestamp, maxTimestamp])
|
|
authorships.splice(k, 1)
|
|
j -= 1
|
|
break
|
|
}
|
|
}
|
|
}
|
|
// clear
|
|
for (let j = 0; j < authorships.length; j++) {
|
|
const authorship = authorships[j]
|
|
if (!authorship[0]) {
|
|
authorships.splice(j, 1)
|
|
j -= 1
|
|
}
|
|
}
|
|
return authorships
|
|
}
|
|
|
|
// eslint-disable-next-line @typescript-eslint/camelcase
|
|
static transformPatchToOperations (patch: patch_obj[], contentLength): number[][] {
|
|
const operations: number[][] = []
|
|
if (patch.length > 0) {
|
|
// calculate original content length
|
|
for (let j = patch.length - 1; j >= 0; j--) {
|
|
const p = patch[j]
|
|
for (let i = 0; i < p.diffs.length; i++) {
|
|
const diff = p.diffs[i]
|
|
switch (diff[0]) {
|
|
case 1: // insert
|
|
contentLength -= diff[1].length
|
|
break
|
|
case -1: // delete
|
|
contentLength += diff[1].length
|
|
break
|
|
}
|
|
}
|
|
}
|
|
// generate operations
|
|
let bias = 0
|
|
let lengthBias = 0
|
|
for (let j = 0; j < patch.length; j++) {
|
|
const operation: number[] = []
|
|
const p = patch[j]
|
|
let currIndex = p.start1 || 0
|
|
const currLength = contentLength - bias
|
|
for (let i = 0; i < p.diffs.length; i++) {
|
|
const diff = p.diffs[i]
|
|
switch (diff[0]) {
|
|
case 0: // retain
|
|
if (i === 0) {
|
|
// first
|
|
operation.push(currIndex + diff[1].length)
|
|
} else if (i !== p.diffs.length - 1) {
|
|
// mid
|
|
operation.push(diff[1].length)
|
|
} else {
|
|
// last
|
|
operation.push(currLength + lengthBias - currIndex)
|
|
}
|
|
currIndex += diff[1].length
|
|
break
|
|
case 1: // insert
|
|
operation.push(diff[1].length)
|
|
lengthBias += diff[1].length
|
|
currIndex += diff[1].length
|
|
break
|
|
case -1: // delete
|
|
operation.push(-diff[1].length)
|
|
bias += diff[1].length
|
|
currIndex += diff[1].length
|
|
break
|
|
}
|
|
}
|
|
operations.push(operation)
|
|
}
|
|
}
|
|
return operations
|
|
}
|
|
|
|
static parseNoteInfo (body): { title: string; tags: string[] } {
|
|
const parsed = Note.extractMeta(body)
|
|
const $ = cheerio.load(md.render(parsed.markdown))
|
|
return {
|
|
title: Note.extractNoteTitle(parsed.meta, $),
|
|
tags: Note.extractNoteTags(parsed.meta, $)
|
|
}
|
|
}
|
|
}
|