summaryrefslogtreecommitdiff
path: root/lib/models/note.js
blob: 96043b7521b364986860648adab2aa8cc359d90e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
"use strict";

// external modules
var fs = require('fs');
var path = require('path');
var LZString = require('lz-string');
var marked = require('marked');
var cheerio = require('cheerio');
var shortId = require('shortid');
var Sequelize = require("sequelize");
var async = require('async');

// core
var config = require("../config.js");
var logger = require("../logger.js");

// permission types
var permissionTypes = ["freely", "editable", "locked", "private"];

module.exports = function (sequelize, DataTypes) {
    var Note = sequelize.define("Note", {
        id: {
            type: DataTypes.UUID,
            primaryKey: true,
            defaultValue: Sequelize.UUIDV4
        },
        shortid: {
            type: DataTypes.STRING,
            unique: true,
            allowNull: false,
            defaultValue: shortId.generate
        },
        alias: {
            type: DataTypes.STRING,
            unique: true
        },
        permission: {
            type: DataTypes.ENUM,
            values: permissionTypes
        },
        viewcount: {
            type: DataTypes.INTEGER,
            allowNull: false,
            defaultValue: 0
        },
        title: {
            type: DataTypes.TEXT
        },
        content: {
            type: DataTypes.TEXT
        },
        lastchangeAt: {
            type: DataTypes.DATE
        }
    }, {
        classMethods: {
            associate: function (models) {
                Note.belongsTo(models.User, {
                    foreignKey: "ownerId",
                    as: "owner",
                    constraints: false
                });
                Note.belongsTo(models.User, {
                    foreignKey: "lastchangeuserId",
                    as: "lastchangeuser",
                    constraints: false
                });
            },
            checkFileExist: function (filePath) {
                try {
                    return fs.statSync(filePath).isFile();
                } catch (err) {
                    return false;
                }
            },
            checkNoteIdValid: function (id) {
                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;
                var result = id.match(uuidRegex);
                if (result && result.length == 1)
                    return true;
                else
                    return false;
            },
            parseNoteId: function (noteId, callback) {
                async.series({
                    parseNoteIdByAlias: function (_callback) {
                        // try to parse note id by alias (e.g. doc)
                        Note.findOne({
                            where: {
                                alias: noteId
                            }
                        }).then(function (note) {
                            if (note) {
                                return callback(null, note.id);
                            } else {
                                var filePath = path.join(config.docspath, noteId + '.md');
                                if (Note.checkFileExist(filePath)) {
                                    Note.create({
                                        alias: noteId,
                                        owner: null,
                                        permission: 'locked'
                                    }).then(function (note) {
                                        return callback(null, note.id);
                                    }).catch(function (err) {
                                        return _callback(err, null);
                                    });
                                } else {
                                    return _callback(null, null);
                                }
                            }
                        }).catch(function (err) {
                            return _callback(err, null);
                        });
                    },
                    parseNoteIdByLZString: function (_callback) {
                        // try to parse note id by LZString Base64
                        try {
                            var id = LZString.decompressFromBase64(noteId);
                            if (id && Note.checkNoteIdValid(id))
                                return callback(null, id);
                            else
                                return _callback(null, null);
                        } catch (err) {
                            return _callback(err, null);
                        }
                    },
                    parseNoteIdByShortId: function (_callback) {
                        // try to parse note id by shortId
                        try {
                            if (shortId.isValid(noteId)) {
                                Note.findOne({
                                    where: {
                                        shortid: noteId
                                    }
                                }).then(function (note) {
                                    if (!note) return _callback(null, null);
                                    return callback(null, note.id);
                                }).catch(function (err) {
                                    return _callback(err, null);
                                });
                            } else {
                                return _callback(null, null);
                            }
                        } catch (err) {
                            return _callback(err, null);
                        }
                    }
                }, function (err, result) {
                    if (err) {
                        logger.error(err);
                        return callback(err, null);
                    }
                    return callback(null, null);
                });
            },
            parseNoteTitle: function (body) {
                var $ = cheerio.load(marked(body));
                var h1s = $("h1");
                var title = "";
                if (h1s.length > 0 && h1s.first().text().split('\n').length == 1)
                    title = h1s.first().text();
                else
                    title = "Untitled";
                return title;
            },
            decodeTitle: function (title) {
                var decodedTitle = LZString.decompressFromBase64(title);
                if (decodedTitle) title = decodedTitle;
                else title = 'Untitled';
                return title;
            },
            generateWebTitle: function (title) {
                title = !title || title == "Untitled" ? "HackMD - Collaborative notes" : title + " - HackMD";
                return title;
            }
        },
        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)) {
                        body = fs.readFileSync(filePath, 'utf8');
                        note.title = LZString.compressToBase64(Note.parseNoteTitle(body));
                        note.content = LZString.compressToBase64(body);
                    }
                }
                // 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);
            }
        }
    });

    return Note;
};