source: trip-planner-front/node_modules/jsonfile/index.js@ e29cc2e

Last change on this file since e29cc2e was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.8 KB
Line 
1var _fs
2try {
3 _fs = require('graceful-fs')
4} catch (_) {
5 _fs = require('fs')
6}
7
8function readFile (file, options, callback) {
9 if (callback == null) {
10 callback = options
11 options = {}
12 }
13
14 if (typeof options === 'string') {
15 options = {encoding: options}
16 }
17
18 options = options || {}
19 var fs = options.fs || _fs
20
21 var shouldThrow = true
22 if ('throws' in options) {
23 shouldThrow = options.throws
24 }
25
26 fs.readFile(file, options, function (err, data) {
27 if (err) return callback(err)
28
29 data = stripBom(data)
30
31 var obj
32 try {
33 obj = JSON.parse(data, options ? options.reviver : null)
34 } catch (err2) {
35 if (shouldThrow) {
36 err2.message = file + ': ' + err2.message
37 return callback(err2)
38 } else {
39 return callback(null, null)
40 }
41 }
42
43 callback(null, obj)
44 })
45}
46
47function readFileSync (file, options) {
48 options = options || {}
49 if (typeof options === 'string') {
50 options = {encoding: options}
51 }
52
53 var fs = options.fs || _fs
54
55 var shouldThrow = true
56 if ('throws' in options) {
57 shouldThrow = options.throws
58 }
59
60 try {
61 var content = fs.readFileSync(file, options)
62 content = stripBom(content)
63 return JSON.parse(content, options.reviver)
64 } catch (err) {
65 if (shouldThrow) {
66 err.message = file + ': ' + err.message
67 throw err
68 } else {
69 return null
70 }
71 }
72}
73
74function stringify (obj, options) {
75 var spaces
76 var EOL = '\n'
77 if (typeof options === 'object' && options !== null) {
78 if (options.spaces) {
79 spaces = options.spaces
80 }
81 if (options.EOL) {
82 EOL = options.EOL
83 }
84 }
85
86 var str = JSON.stringify(obj, options ? options.replacer : null, spaces)
87
88 return str.replace(/\n/g, EOL) + EOL
89}
90
91function writeFile (file, obj, options, callback) {
92 if (callback == null) {
93 callback = options
94 options = {}
95 }
96 options = options || {}
97 var fs = options.fs || _fs
98
99 var str = ''
100 try {
101 str = stringify(obj, options)
102 } catch (err) {
103 // Need to return whether a callback was passed or not
104 if (callback) callback(err, null)
105 return
106 }
107
108 fs.writeFile(file, str, options, callback)
109}
110
111function writeFileSync (file, obj, options) {
112 options = options || {}
113 var fs = options.fs || _fs
114
115 var str = stringify(obj, options)
116 // not sure if fs.writeFileSync returns anything, but just in case
117 return fs.writeFileSync(file, str, options)
118}
119
120function stripBom (content) {
121 // we do this because JSON.parse would convert it to a utf8 string if encoding wasn't specified
122 if (Buffer.isBuffer(content)) content = content.toString('utf8')
123 content = content.replace(/^\uFEFF/, '')
124 return content
125}
126
127var jsonfile = {
128 readFile: readFile,
129 readFileSync: readFileSync,
130 writeFile: writeFile,
131 writeFileSync: writeFileSync
132}
133
134module.exports = jsonfile
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