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1 | import 'multer' | |
2 | import { UploadFilesForCheck } from 'express' | |
3 | import { sep } from 'path' | |
4 | import validator from 'validator' | |
5 | ||
6 | function exists (value: any) { | |
7 | return value !== undefined && value !== null | |
8 | } | |
9 | ||
10 | function isSafePath (p: string) { | |
11 | return exists(p) && | |
12 | (p + '').split(sep).every(part => { | |
13 | return [ '..' ].includes(part) === false | |
14 | }) | |
15 | } | |
16 | ||
17 | function isArray (value: any): value is any[] { | |
18 | return Array.isArray(value) | |
19 | } | |
20 | ||
21 | function isNotEmptyIntArray (value: any) { | |
22 | return Array.isArray(value) && value.every(v => validator.isInt('' + v)) && value.length !== 0 | |
23 | } | |
24 | ||
25 | function isArrayOf (value: any, validator: (value: any) => boolean) { | |
26 | return isArray(value) && value.every(v => validator(v)) | |
27 | } | |
28 | ||
29 | function isDateValid (value: string) { | |
30 | return exists(value) && validator.isISO8601(value) | |
31 | } | |
32 | ||
33 | function isIdValid (value: string) { | |
34 | return exists(value) && validator.isInt('' + value) | |
35 | } | |
36 | ||
37 | function isUUIDValid (value: string) { | |
38 | return exists(value) && validator.isUUID('' + value, 4) | |
39 | } | |
40 | ||
41 | function isIdOrUUIDValid (value: string) { | |
42 | return isIdValid(value) || isUUIDValid(value) | |
43 | } | |
44 | ||
45 | function isBooleanValid (value: any) { | |
46 | return typeof value === 'boolean' || (typeof value === 'string' && validator.isBoolean(value)) | |
47 | } | |
48 | ||
49 | function isIntOrNull (value: any) { | |
50 | return value === null || validator.isInt('' + value) | |
51 | } | |
52 | ||
53 | function toIntOrNull (value: string) { | |
54 | const v = toValueOrNull(value) | |
55 | ||
56 | if (v === null || v === undefined) return v | |
57 | if (typeof v === 'number') return v | |
58 | ||
59 | return validator.toInt('' + v) | |
60 | } | |
61 | ||
62 | function toBooleanOrNull (value: any) { | |
63 | const v = toValueOrNull(value) | |
64 | ||
65 | if (v === null || v === undefined) return v | |
66 | if (typeof v === 'boolean') return v | |
67 | ||
68 | return validator.toBoolean('' + v) | |
69 | } | |
70 | ||
71 | function toValueOrNull (value: string) { | |
72 | if (value === 'null') return null | |
73 | ||
74 | return value | |
75 | } | |
76 | ||
77 | function toArray (value: any) { | |
78 | if (value && isArray(value) === false) return [ value ] | |
79 | ||
80 | return value | |
81 | } | |
82 | ||
83 | function toIntArray (value: any) { | |
84 | if (!value) return [] | |
85 | if (isArray(value) === false) return [ validator.toInt(value) ] | |
86 | ||
87 | return value.map(v => validator.toInt(v)) | |
88 | } | |
89 | ||
90 | function isFileFieldValid ( | |
91 | files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[], | |
92 | field: string, | |
93 | optional = false | |
94 | ) { | |
95 | // Should have files | |
96 | if (!files) return optional | |
97 | if (isArray(files)) return optional | |
98 | ||
99 | // Should have a file | |
100 | const fileArray = files[field] | |
101 | if (!fileArray || fileArray.length === 0) { | |
102 | return optional | |
103 | } | |
104 | ||
105 | // The file should exist | |
106 | const file = fileArray[0] | |
107 | if (!file || !file.originalname) return false | |
108 | return file | |
109 | } | |
110 | ||
111 | function isFileMimeTypeValid ( | |
112 | files: UploadFilesForCheck, | |
113 | mimeTypeRegex: string, | |
114 | field: string, | |
115 | optional = false | |
116 | ) { | |
117 | // Should have files | |
118 | if (!files) return optional | |
119 | if (isArray(files)) return optional | |
120 | ||
121 | // Should have a file | |
122 | const fileArray = files[field] | |
123 | if (!fileArray || fileArray.length === 0) { | |
124 | return optional | |
125 | } | |
126 | ||
127 | // The file should exist | |
128 | const file = fileArray[0] | |
129 | if (!file || !file.originalname) return false | |
130 | ||
131 | return new RegExp(`^${mimeTypeRegex}$`, 'i').test(file.mimetype) | |
132 | } | |
133 | ||
134 | function isFileValid ( | |
135 | files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[], | |
136 | mimeTypeRegex: string, | |
137 | field: string, | |
138 | maxSize: number | null, | |
139 | optional = false | |
140 | ) { | |
141 | // Should have files | |
142 | if (!files) return optional | |
143 | if (isArray(files)) return optional | |
144 | ||
145 | // Should have a file | |
146 | const fileArray = files[field] | |
147 | if (!fileArray || fileArray.length === 0) { | |
148 | return optional | |
149 | } | |
150 | ||
151 | // The file should exist | |
152 | const file = fileArray[0] | |
153 | if (!file || !file.originalname) return false | |
154 | ||
155 | // Check size | |
156 | if ((maxSize !== null) && file.size > maxSize) return false | |
157 | ||
158 | return new RegExp(`^${mimeTypeRegex}$`, 'i').test(file.mimetype) | |
159 | } | |
160 | ||
161 | // --------------------------------------------------------------------------- | |
162 | ||
163 | export { | |
164 | exists, | |
165 | isArrayOf, | |
166 | isNotEmptyIntArray, | |
167 | isArray, | |
168 | isIntOrNull, | |
169 | isIdValid, | |
170 | isSafePath, | |
171 | isUUIDValid, | |
172 | isIdOrUUIDValid, | |
173 | isDateValid, | |
174 | toValueOrNull, | |
175 | toBooleanOrNull, | |
176 | isBooleanValid, | |
177 | toIntOrNull, | |
178 | toArray, | |
179 | toIntArray, | |
180 | isFileFieldValid, | |
181 | isFileMimeTypeValid, | |
182 | isFileValid | |
183 | } |