284 lines
12 KiB
JavaScript
284 lines
12 KiB
JavaScript
"use strict";
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// external modules
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var fs = require('fs');
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var path = require('path');
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var LZString = require('lz-string');
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var md = require('markdown-it')();
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var metaMarked = require('meta-marked');
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var cheerio = require('cheerio');
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var shortId = require('shortid');
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var Sequelize = require("sequelize");
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var async = require('async');
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var moment = require('moment');
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// core
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var config = require("../config.js");
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var logger = require("../logger.js");
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// permission types
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var permissionTypes = ["freely", "editable", "locked", "private"];
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module.exports = function (sequelize, DataTypes) {
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var Note = sequelize.define("Note", {
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id: {
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type: DataTypes.UUID,
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primaryKey: true,
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defaultValue: Sequelize.UUIDV4
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},
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shortid: {
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type: DataTypes.STRING,
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unique: true,
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allowNull: false,
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defaultValue: shortId.generate
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},
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alias: {
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type: DataTypes.STRING,
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unique: true
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},
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permission: {
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type: DataTypes.ENUM,
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values: permissionTypes
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},
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viewcount: {
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type: DataTypes.INTEGER,
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allowNull: false,
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defaultValue: 0
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},
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title: {
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type: DataTypes.TEXT
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},
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content: {
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type: DataTypes.TEXT
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},
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authorship: {
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type: DataTypes.TEXT
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},
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lastchangeAt: {
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type: DataTypes.DATE
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},
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savedAt: {
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type: DataTypes.DATE
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}
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}, {
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classMethods: {
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associate: function (models) {
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Note.belongsTo(models.User, {
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foreignKey: "ownerId",
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as: "owner",
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constraints: false
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});
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Note.belongsTo(models.User, {
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foreignKey: "lastchangeuserId",
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as: "lastchangeuser",
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constraints: false
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});
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Note.hasMany(models.Revision, {
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foreignKey: "noteId",
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constraints: false
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});
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Note.hasMany(models.Author, {
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foreignKey: "noteId",
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as: "authors",
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constraints: false
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});
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},
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checkFileExist: function (filePath) {
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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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checkNoteIdValid: function (id) {
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var 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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var result = id.match(uuidRegex);
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if (result && result.length == 1)
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return true;
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else
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return false;
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},
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parseNoteId: function (noteId, callback) {
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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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var 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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var fsModifiedTime = moment(fs.statSync(filePath).mtime);
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var dbModifiedTime = moment(note.lastchangeAt || note.createdAt);
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if (fsModifiedTime.isAfter(dbModifiedTime)) {
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var body = fs.readFileSync(filePath, 'utf8');
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note.update({
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title: LZString.compressToBase64(Note.parseNoteTitle(body)),
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content: LZString.compressToBase64(body),
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lastchangeAt: fsModifiedTime
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}).then(function (note) {
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sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
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if (err) return _callback(err, null);
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return callback(null, note.id);
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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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var 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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parseNoteIdByLZString: function (_callback) {
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// try to parse note id by LZString Base64
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try {
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var 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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} catch (err) {
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return _callback(err, 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 (shortId.isValid(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, result) {
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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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parseNoteTitle: function (body) {
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var title = "";
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var meta = null;
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try {
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var obj = metaMarked(body);
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body = obj.markdown;
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meta = obj.meta;
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} catch (err) {
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//na
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}
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if (meta && 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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var $ = cheerio.load(md.render(body));
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var h1s = $("h1");
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if (h1s.length > 0 && h1s.first().text().split('\n').length == 1)
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title = h1s.first().text();
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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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decodeTitle: function (title) {
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var decodedTitle = LZString.decompressFromBase64(title);
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if (decodedTitle) title = decodedTitle;
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else title = 'Untitled';
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return title;
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},
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generateWebTitle: function (title) {
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title = !title || title == "Untitled" ? "HackMD - Collaborative markdown notes" : title + " - HackMD";
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return title;
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},
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parseMeta: function (meta) {
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var _meta = {};
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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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if (meta.description && (typeof meta.description == "string" || typeof meta.description == "number"))
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_meta.description = meta.description;
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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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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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return _meta;
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}
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},
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hooks: {
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beforeCreate: function (note, options, callback) {
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// if no content specified then use default note
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if (!note.content) {
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var body = null;
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var filePath = null;
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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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var fsCreatedTime = moment(fs.statSync(filePath).ctime);
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body = fs.readFileSync(filePath, 'utf8');
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note.title = LZString.compressToBase64(Note.parseNoteTitle(body));
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note.content = LZString.compressToBase64(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 editable permission, else default permission is freely
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if (!note.permission) {
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if (note.ownerId) {
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note.permission = "editable";
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} else {
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note.permission = "freely";
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}
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}
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return callback(null, note);
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},
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afterCreate: function (note, options, callback) {
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sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
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callback(err, note);
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});
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}
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}
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});
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return Note;
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}; |