/
csv.go
82 lines (63 loc) · 1.39 KB
/
csv.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
package goutil
import (
"encoding/csv"
"errors"
"os"
"github.com/jszwec/csvutil"
)
var ErrWriterCSVNotInited = errors.New("WriterCSV not initialized. It's important to use NewWriterCSV()")
type WriterCSV struct {
init bool
st interface{}
out *os.File
enc *csvutil.Encoder
wr *csv.Writer
}
func NewWriterCSV(filename string, structType interface{}, headers bool) (wrCSV *WriterCSV, err error) {
wrCSV = new(WriterCSV)
if wrCSV.out, err = os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err != nil {
return
}
wrCSV.st = structType
wrCSV.wr = csv.NewWriter(wrCSV.out)
wrCSV.enc = csvutil.NewEncoder(wrCSV.wr)
wrCSV.init = true
if headers {
if err = wrCSV.writeHeaders(); err != nil {
return
}
}
return
}
func (w *WriterCSV) writeHeaders() (err error) {
if !w.init {
return ErrWriterCSVNotInited
}
if err = w.enc.EncodeHeader(w.st); err != nil {
return
}
w.wr.Flush()
return
}
func (w *WriterCSV) WriteRow(v interface{}) (err error) {
if !w.init {
return ErrWriterCSVNotInited
}
if err = w.enc.Encode(v); err != nil {
return
}
w.wr.Flush()
return
}
func (w *WriterCSV) Close() (err error) {
if !w.init {
return ErrWriterCSVNotInited
}
return w.out.Close()
}
func UnmarshalCSV(data []byte, dest interface{}) (err error) {
return csvutil.Unmarshal(data, dest)
}
func MarshalCSV(v interface{}) ([]byte, error) {
return csvutil.Marshal(v)
}