-
Notifications
You must be signed in to change notification settings - Fork 52
/
file.go
179 lines (143 loc) · 3.44 KB
/
file.go
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
package helper
import (
"crypto/md5"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"golang.org/x/text/encoding/unicode"
"golang.org/x/text/transform"
)
var (
utf16Encoding = unicode.UTF16(unicode.LittleEndian, unicode.UseBOM)
// ErrFileNotFound file not found
ErrFileNotFound = errors.New("file not found")
// ErrInvalidJsonFileFormat Contains all errors reported during json decode.
ErrInvalidJsonFileFormat = errors.New("invalid json file")
)
func Encode(obj interface{}) ([]byte, error) {
data, err := json.Marshal(obj)
if err != nil {
return nil, err
}
return utf16Encoding.NewEncoder().Bytes(data)
}
func Decode(f io.ReadSeeker, obj interface{}) error {
r := transform.NewReader(f, utf16Encoding.NewDecoder().Transformer)
if err := json.NewDecoder(r).Decode(obj); err != nil {
if _, errSeek := f.Seek(0, io.SeekStart); errSeek != nil {
return errSeek
}
// trying decode non ut16 content
if err2 := json.NewDecoder(f).Decode(obj); err2 != nil {
return WrapErrors(ErrInvalidJsonFileFormat, err2, err)
}
}
return nil
}
func LoadFromPath(baseDir, filename string, obj interface{}) error {
path := filepath.Join(baseDir, filename)
f, err := os.Open(path)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
return WrapErrors(ErrFileNotFound, err)
}
return err
}
defer func(f *os.File) {
_ = f.Close()
}(f)
return Decode(f, obj)
}
func SaveToPath(baseDir, filename string, obj interface{}) error {
encodedData, err := Encode(obj)
if err != nil {
return err
}
path := filepath.Join(baseDir, filename)
if err := ioutil.WriteFile(path, encodedData, 0655); err != nil {
return err
}
return nil
}
func CheckMd5Sum(path string) (string, error) {
data, err := os.ReadFile(path)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
return "", WrapErrors(ErrFileNotFound, err)
}
return "", err
}
hash := md5.New()
if _, err := hash.Write(data); err != nil {
return "", err
}
return fmt.Sprintf("%x", hash.Sum(nil)), nil
}
func Exists(filePath string) bool {
if _, err := os.Stat(filePath); os.IsNotExist(err) {
return false
}
return true
}
func Copy(srcFile, dstFile string) error {
out, err := os.Create(dstFile)
if err != nil {
return err
}
defer out.Close()
in, err := os.Open(srcFile)
defer func() { _ = in.Close() }()
if err != nil {
return err
}
_, err = io.Copy(out, in)
if err != nil {
return err
}
return nil
}
// CreateIfNotExists creates a new directory if not exists
func CreateIfNotExists(dir string, perm os.FileMode) error {
if Exists(dir) {
return nil
}
if err := os.MkdirAll(dir, perm); err != nil {
return fmt.Errorf("failed to create directory: '%s', error: '%s'", dir, err.Error())
}
return nil
}
func CopyDirectory(scrDir, dest string) error {
entries, err := ioutil.ReadDir(scrDir)
if err != nil {
return err
}
for _, entry := range entries {
sourcePath := filepath.Join(scrDir, entry.Name())
destPath := filepath.Join(dest, entry.Name())
fileInfo, err := os.Stat(sourcePath)
if err != nil {
return err
}
switch fileInfo.Mode() & os.ModeType {
case os.ModeDir:
if err := CreateIfNotExists(destPath, 0755); err != nil {
return err
}
if err := CopyDirectory(sourcePath, destPath); err != nil {
return err
}
default:
if err := Copy(sourcePath, destPath); err != nil {
return err
}
}
if err := os.Chmod(destPath, entry.Mode()); err != nil {
return err
}
}
return nil
}