2016-04-20 10:03:55 +00:00
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"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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2016-07-02 08:11:06 +00:00
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var md = require('markdown-it')();
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2016-06-21 13:42:03 +00:00
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var metaMarked = require('meta-marked');
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2016-04-20 10:03:55 +00:00
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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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2016-05-30 04:43:51 +00:00
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var moment = require('moment');
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2016-10-10 12:23:33 +00:00
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var DiffMatchPatch = require('diff-match-patch');
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var dmp = new DiffMatchPatch();
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2016-10-10 12:38:14 +00:00
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var S = require('string');
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2016-04-20 10:03:55 +00:00
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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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2016-10-10 12:23:33 +00:00
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//ot
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var ot = require("../ot/index.js");
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2016-04-20 10:03:55 +00:00
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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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2017-01-02 03:05:05 +00:00
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type: DataTypes.TEXT,
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2017-01-02 03:05:36 +00:00
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get: function () {
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return sequelize.processData(this.getDataValue('title'), "");
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},
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2017-01-02 03:05:05 +00:00
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set: function (value) {
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this.setDataValue('title', sequelize.stripNullByte(value));
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}
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2016-04-20 10:03:55 +00:00
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},
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content: {
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2017-01-02 03:05:05 +00:00
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type: DataTypes.TEXT,
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2017-01-02 03:05:36 +00:00
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get: function () {
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return sequelize.processData(this.getDataValue('content'), "");
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},
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2017-01-02 03:05:05 +00:00
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set: function (value) {
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this.setDataValue('content', sequelize.stripNullByte(value));
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}
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2016-04-20 10:03:55 +00:00
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},
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2016-07-30 03:21:38 +00:00
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authorship: {
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2017-01-02 03:05:05 +00:00
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type: DataTypes.TEXT,
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2017-01-02 03:05:36 +00:00
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get: function () {
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return sequelize.processData(this.getDataValue('authorship'), [], JSON.parse);
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},
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2017-01-02 03:05:05 +00:00
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set: function (value) {
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this.setDataValue('authorship', JSON.stringify(value));
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}
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2016-07-30 03:21:38 +00:00
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},
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2016-04-20 10:03:55 +00:00
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lastchangeAt: {
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type: DataTypes.DATE
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2016-06-17 08:09:33 +00:00
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},
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savedAt: {
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type: DataTypes.DATE
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2016-04-20 10:03:55 +00:00
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}
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}, {
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2016-10-10 13:04:24 +00:00
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paranoid: true,
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2016-04-20 10:03:55 +00:00
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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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2016-06-17 08:09:33 +00:00
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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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2016-07-30 03:21:38 +00:00
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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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2016-04-20 10:03:55 +00:00
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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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2016-05-30 04:43:51 +00:00
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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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2016-08-14 03:22:54 +00:00
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var body = fs.readFileSync(filePath, 'utf8');
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2016-10-10 12:23:33 +00:00
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var contentLength = body.length;
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2016-08-14 03:22:54 +00:00
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var title = Note.parseNoteTitle(body);
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if (fsModifiedTime.isAfter(dbModifiedTime) && note.content !== body) {
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2016-06-17 08:09:33 +00:00
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note.update({
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2016-08-14 03:22:54 +00:00
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title: title,
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content: body,
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2016-06-17 08:09:33 +00:00
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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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2016-10-10 12:23:33 +00:00
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// update authorship on after making revision of docs
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2017-01-02 02:59:53 +00:00
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var patch = dmp.patch_fromText(revision.patch);
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2016-10-10 12:23:33 +00:00
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var operations = Note.transformPatchToOperations(patch, contentLength);
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2017-01-02 02:59:53 +00:00
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var authorship = note.authorship;
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2016-10-10 12:23:33 +00:00
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for (var 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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2017-01-02 02:59:53 +00:00
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authorship: JSON.stringify(authorship)
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2016-10-10 12:23:33 +00:00
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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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2016-06-17 08:09:33 +00:00
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});
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2016-05-30 04:43:51 +00:00
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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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2016-04-20 10:03:55 +00:00
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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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2016-10-10 12:55:33 +00:00
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parseNoteInfo: function (body) {
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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 = {};
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var $ = cheerio.load(md.render(body));
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return {
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title: Note.extractNoteTitle(meta, $),
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tags: Note.extractNoteTags(meta, $)
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};
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},
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2016-04-20 10:03:55 +00:00
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parseNoteTitle: function (body) {
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2016-06-21 13:42:03 +00:00
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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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2016-08-15 02:59:40 +00:00
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if (!meta) meta = {};
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2016-10-10 12:55:33 +00:00
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var $ = cheerio.load(md.render(body));
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return Note.extractNoteTitle(meta, $);
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},
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extractNoteTitle: function (meta, $) {
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var title = "";
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2016-08-15 02:59:40 +00:00
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if (meta.title && (typeof meta.title == "string" || typeof meta.title == "number")) {
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2016-06-21 13:42:03 +00:00
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title = meta.title;
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} else {
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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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2016-10-10 12:38:14 +00:00
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title = S(h1s.first().text()).stripTags().s;
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2016-06-21 13:42:03 +00:00
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}
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if (!title) title = "Untitled";
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2016-04-20 10:03:55 +00:00
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return title;
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},
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2016-11-26 15:04:29 +00:00
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generateDescription: function (markdown) {
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return markdown.substr(0, 100).replace(/(?:\r\n|\r|\n)/g, ' ');
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},
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2016-04-20 10:03:55 +00:00
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decodeTitle: function (title) {
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2017-01-02 02:59:53 +00:00
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return title ? title : 'Untitled';
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2016-04-20 10:03:55 +00:00
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},
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generateWebTitle: function (title) {
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2016-05-27 17:51:45 +00:00
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title = !title || title == "Untitled" ? "HackMD - Collaborative markdown notes" : title + " - HackMD";
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2016-04-20 10:03:55 +00:00
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return title;
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2016-06-21 13:42:03 +00:00
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},
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2016-10-10 12:55:33 +00:00
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extractNoteTags: function (meta, $) {
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var tags = [];
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var rawtags = [];
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if (meta.tags && (typeof meta.tags == "string" || typeof meta.tags == "number")) {
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var metaTags = ('' + meta.tags).split(',');
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for (var i = 0; i < metaTags.length; i++) {
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var text = 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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var 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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var codes = $(value).find("code");
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for (var i = 0; i < codes.length; i++) {
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2016-10-12 05:14:59 +00:00
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|
|
var text = S($(codes[i]).text().trim()).stripTags().s;
|
2016-10-10 12:55:33 +00:00
|
|
|
if (text) rawtags.push(text);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
});
|
|
|
|
|
}
|
|
|
|
|
for (var i = 0; i < rawtags.length; i++) {
|
|
|
|
|
var found = false;
|
|
|
|
|
for (var j = 0; j < tags.length; j++) {
|
|
|
|
|
if (tags[j] == rawtags[i]) {
|
|
|
|
|
found = true;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (!found)
|
|
|
|
|
tags.push(rawtags[i]);
|
|
|
|
|
}
|
|
|
|
|
return tags;
|
|
|
|
|
},
|
2016-06-21 13:42:03 +00:00
|
|
|
parseMeta: function (meta) {
|
|
|
|
|
var _meta = {};
|
|
|
|
|
if (meta) {
|
|
|
|
|
if (meta.title && (typeof meta.title == "string" || typeof meta.title == "number"))
|
|
|
|
|
_meta.title = meta.title;
|
|
|
|
|
if (meta.description && (typeof meta.description == "string" || typeof meta.description == "number"))
|
|
|
|
|
_meta.description = meta.description;
|
|
|
|
|
if (meta.robots && (typeof meta.robots == "string" || typeof meta.robots == "number"))
|
|
|
|
|
_meta.robots = meta.robots;
|
|
|
|
|
if (meta.GA && (typeof meta.GA == "string" || typeof meta.GA == "number"))
|
|
|
|
|
_meta.GA = meta.GA;
|
2016-08-15 03:25:27 +00:00
|
|
|
if (meta.disqus && (typeof meta.disqus == "string" || typeof meta.disqus == "number"))
|
|
|
|
|
_meta.disqus = meta.disqus;
|
2016-07-31 16:08:22 +00:00
|
|
|
if (meta.slideOptions && (typeof meta.slideOptions == "object"))
|
|
|
|
|
_meta.slideOptions = meta.slideOptions;
|
2016-06-21 13:42:03 +00:00
|
|
|
}
|
|
|
|
|
return _meta;
|
2016-10-10 12:23:33 +00:00
|
|
|
},
|
|
|
|
|
updateAuthorshipByOperation: function (operation, userId, authorships) {
|
|
|
|
|
var index = 0;
|
|
|
|
|
var timestamp = Date.now();
|
|
|
|
|
for (var i = 0; i < operation.length; i++) {
|
|
|
|
|
var op = operation[i];
|
|
|
|
|
if (ot.TextOperation.isRetain(op)) {
|
|
|
|
|
index += op;
|
|
|
|
|
} else if (ot.TextOperation.isInsert(op)) {
|
|
|
|
|
var opStart = index;
|
|
|
|
|
var opEnd = index + op.length;
|
|
|
|
|
var inserted = false;
|
|
|
|
|
// authorship format: [userId, startPos, endPos, createdAt, updatedAt]
|
|
|
|
|
if (authorships.length <= 0) authorships.push([userId, opStart, opEnd, timestamp, timestamp]);
|
|
|
|
|
else {
|
|
|
|
|
for (var j = 0; j < authorships.length; j++) {
|
|
|
|
|
var authorship = authorships[j];
|
|
|
|
|
if (!inserted) {
|
|
|
|
|
var nextAuthorship = authorships[j + 1] || -1;
|
|
|
|
|
if (nextAuthorship != -1 && nextAuthorship[1] >= opEnd || j >= authorships.length - 1) {
|
|
|
|
|
if (authorship[1] < opStart && authorship[2] > opStart) {
|
|
|
|
|
// divide
|
|
|
|
|
var postLength = authorship[2] - opStart;
|
|
|
|
|
authorship[2] = opStart;
|
|
|
|
|
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)) {
|
|
|
|
|
var opStart = index;
|
|
|
|
|
var opEnd = index - op;
|
|
|
|
|
if (operation.length == 1) {
|
|
|
|
|
authorships = [];
|
|
|
|
|
} else if (authorships.length > 0) {
|
|
|
|
|
for (var j = 0; j < authorships.length; j++) {
|
|
|
|
|
var 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 (var j = 0; j < authorships.length; j++) {
|
|
|
|
|
var authorship = authorships[j];
|
|
|
|
|
for (var k = j + 1; k < authorships.length; k++) {
|
|
|
|
|
var nextAuthorship = authorships[k];
|
|
|
|
|
if (nextAuthorship && authorship[0] === nextAuthorship[0] && authorship[2] === nextAuthorship[1]) {
|
|
|
|
|
var minTimestamp = Math.min(authorship[3], nextAuthorship[3]);
|
|
|
|
|
var 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 (var j = 0; j < authorships.length; j++) {
|
|
|
|
|
var authorship = authorships[j];
|
|
|
|
|
if (!authorship[0]) {
|
|
|
|
|
authorships.splice(j, 1);
|
|
|
|
|
j -= 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return authorships;
|
|
|
|
|
},
|
|
|
|
|
transformPatchToOperations: function (patch, contentLength) {
|
|
|
|
|
var operations = [];
|
|
|
|
|
if (patch.length > 0) {
|
|
|
|
|
// calculate original content length
|
|
|
|
|
for (var j = patch.length - 1; j >= 0; j--) {
|
|
|
|
|
var p = patch[j];
|
|
|
|
|
for (var i = 0; i < p.diffs.length; i++) {
|
|
|
|
|
var 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
|
|
|
|
|
var bias = 0;
|
|
|
|
|
var lengthBias = 0;
|
|
|
|
|
for (var j = 0; j < patch.length; j++) {
|
|
|
|
|
var operation = [];
|
|
|
|
|
var p = patch[j];
|
|
|
|
|
var currIndex = p.start1;
|
|
|
|
|
var currLength = contentLength - bias;
|
|
|
|
|
for (var i = 0; i < p.diffs.length; i++) {
|
|
|
|
|
var 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]);
|
|
|
|
|
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;
|
2016-04-20 10:03:55 +00:00
|
|
|
}
|
|
|
|
|
},
|
|
|
|
|
hooks: {
|
|
|
|
|
beforeCreate: function (note, options, callback) {
|
|
|
|
|
// if no content specified then use default note
|
|
|
|
|
if (!note.content) {
|
|
|
|
|
var body = null;
|
|
|
|
|
var filePath = null;
|
|
|
|
|
if (!note.alias) {
|
|
|
|
|
filePath = config.defaultnotepath;
|
|
|
|
|
} else {
|
|
|
|
|
filePath = path.join(config.docspath, note.alias + '.md');
|
|
|
|
|
}
|
|
|
|
|
if (Note.checkFileExist(filePath)) {
|
2016-06-01 15:19:47 +00:00
|
|
|
var fsCreatedTime = moment(fs.statSync(filePath).ctime);
|
2016-04-20 10:03:55 +00:00
|
|
|
body = fs.readFileSync(filePath, 'utf8');
|
2017-01-02 02:59:53 +00:00
|
|
|
note.title = Note.parseNoteTitle(body);
|
|
|
|
|
note.content = body;
|
2016-06-17 08:28:04 +00:00
|
|
|
if (filePath !== config.defaultnotepath) {
|
|
|
|
|
note.createdAt = fsCreatedTime;
|
|
|
|
|
}
|
2016-04-20 10:03:55 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
// if no permission specified and have owner then give editable permission, else default permission is freely
|
|
|
|
|
if (!note.permission) {
|
|
|
|
|
if (note.ownerId) {
|
|
|
|
|
note.permission = "editable";
|
|
|
|
|
} else {
|
|
|
|
|
note.permission = "freely";
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return callback(null, note);
|
2016-06-17 08:09:33 +00:00
|
|
|
},
|
|
|
|
|
afterCreate: function (note, options, callback) {
|
|
|
|
|
sequelize.models.Revision.saveNoteRevision(note, function (err, revision) {
|
|
|
|
|
callback(err, note);
|
|
|
|
|
});
|
2016-04-20 10:03:55 +00:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
return Note;
|
|
|
|
|
};
|
