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1 | import 'multer' | |
2 | import validator from 'validator' | |
3 | import { sep } from 'path' | |
4 | ||
5 | function exists (value: any) { | |
6 | return value !== undefined && value !== null | |
7 | } | |
8 | ||
9 | function isSafePath (p: string) { | |
10 | return exists(p) && | |
11 | (p + '').split(sep).every(part => { | |
12 | return [ '..' ].includes(part) === false | |
13 | }) | |
14 | } | |
15 | ||
16 | function isArray (value: any) { | |
17 | return Array.isArray(value) | |
18 | } | |
19 | ||
20 | function isNotEmptyIntArray (value: any) { | |
21 | return Array.isArray(value) && value.every(v => validator.isInt('' + v)) && value.length !== 0 | |
22 | } | |
23 | ||
24 | function isArrayOf (value: any, validator: (value: any) => boolean) { | |
25 | return isArray(value) && value.every(v => validator(v)) | |
26 | } | |
27 | ||
28 | function isDateValid (value: string) { | |
29 | return exists(value) && validator.isISO8601(value) | |
30 | } | |
31 | ||
32 | function isIdValid (value: string) { | |
33 | return exists(value) && validator.isInt('' + value) | |
34 | } | |
35 | ||
36 | function isUUIDValid (value: string) { | |
37 | return exists(value) && validator.isUUID('' + value, 4) | |
38 | } | |
39 | ||
40 | function isIdOrUUIDValid (value: string) { | |
41 | return isIdValid(value) || isUUIDValid(value) | |
42 | } | |
43 | ||
44 | function isBooleanValid (value: any) { | |
45 | return typeof value === 'boolean' || (typeof value === 'string' && validator.isBoolean(value)) | |
46 | } | |
47 | ||
48 | function toIntOrNull (value: string) { | |
49 | const v = toValueOrNull(value) | |
50 | ||
51 | if (v === null || v === undefined) return v | |
52 | if (typeof v === 'number') return v | |
53 | ||
54 | return validator.toInt('' + v) | |
55 | } | |
56 | ||
57 | function toBooleanOrNull (value: any) { | |
58 | const v = toValueOrNull(value) | |
59 | ||
60 | if (v === null || v === undefined) return v | |
61 | if (typeof v === 'boolean') return v | |
62 | ||
63 | return validator.toBoolean('' + v) | |
64 | } | |
65 | ||
66 | function toValueOrNull (value: string) { | |
67 | if (value === 'null') return null | |
68 | ||
69 | return value | |
70 | } | |
71 | ||
72 | function toArray (value: any) { | |
73 | if (value && isArray(value) === false) return [ value ] | |
74 | ||
75 | return value | |
76 | } | |
77 | ||
78 | function toIntArray (value: any) { | |
79 | if (!value) return [] | |
80 | if (isArray(value) === false) return [ validator.toInt(value) ] | |
81 | ||
82 | return value.map(v => validator.toInt(v)) | |
83 | } | |
84 | ||
85 | function isFileValid ( | |
86 | files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[], | |
87 | mimeTypeRegex: string, | |
88 | field: string, | |
89 | maxSize: number | null, | |
90 | optional = false | |
91 | ) { | |
92 | // Should have files | |
93 | if (!files) return optional | |
94 | if (isArray(files)) return optional | |
95 | ||
96 | // Should have a file | |
97 | const fileArray = files[field] | |
98 | if (!fileArray || fileArray.length === 0) { | |
99 | return optional | |
100 | } | |
101 | ||
102 | // The file should exist | |
103 | const file = fileArray[0] | |
104 | if (!file || !file.originalname) return false | |
105 | ||
106 | // Check size | |
107 | if ((maxSize !== null) && file.size > maxSize) return false | |
108 | ||
109 | return new RegExp(`^${mimeTypeRegex}$`, 'i').test(file.mimetype) | |
110 | } | |
111 | ||
112 | // --------------------------------------------------------------------------- | |
113 | ||
114 | export { | |
115 | exists, | |
116 | isArrayOf, | |
117 | isNotEmptyIntArray, | |
118 | isArray, | |
119 | isIdValid, | |
120 | isSafePath, | |
121 | isUUIDValid, | |
122 | isIdOrUUIDValid, | |
123 | isDateValid, | |
124 | toValueOrNull, | |
125 | toBooleanOrNull, | |
126 | isBooleanValid, | |
127 | toIntOrNull, | |
128 | toArray, | |
129 | toIntArray, | |
130 | isFileValid | |
131 | } |