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
|
package reader
import (
"encoding/csv"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"strings"
"github.com/tealeg/xlsx"
)
//DatamapLine - a line from the datamap.
type DatamapLine struct {
Key string
Sheet string
Cellref string
}
type fileError struct {
file string
msg string
}
func (e *fileError) Error() string {
return fmt.Sprintf("%s", e.msg)
}
//Keylens returns the length of a key
func Keylens(dml DatamapLine) (int, int) {
return len(dml.Key), len(dml.Sheet)
}
//ReadDML returns a slice of DatamapLine structs
func ReadDML(path string) ([]DatamapLine, error) {
var s []DatamapLine
data, err := ioutil.ReadFile(path)
if err != nil {
return s, errors.New("Cannot find file")
}
r := csv.NewReader(strings.NewReader(string(data)))
for {
record, err := r.Read()
if err == io.EOF {
break
}
if err != nil {
return s, errors.New("Cannot read line %s")
}
if record[0] == "cell_key" {
// this must be the header
continue
}
dml := DatamapLine{
Key: strings.Trim(record[0], " "),
Sheet: strings.Trim(record[1], " "),
Cellref: strings.Trim(record[2], " ")}
s = append(s, dml)
}
return s, nil
}
//ExtractedCell is Data pulled from a cell
type ExtractedCell struct {
cell *xlsx.Cell
colLidx string
rowLidx int
value string
}
var lowerAlpha [2]string = [2]string{"A", "B"}
// two alphabet lengths
const ablen int = 52
//alphSingle generates all the letters of the alphabet
func alphaSingle() []string {
letters := make([]string, 26)
for idx := range letters {
letters[idx] = string('A' + byte(idx))
}
return letters
}
//alphas generates the alpha column compont of Excel cell references
//Combines n alphabets to do this.
func alphas(n int) []string {
single := alphaSingle()
slen := len(single)
tmp := make([]string, len(single))
copy(tmp, single)
for cycle := 0; cycle < n; cycle++ {
for y := 0; y < slen; y++ {
single = append(single, single[(cycle+2)-2]+tmp[y])
}
}
return single
}
//ReadXLSX reads an XLSX file
func ReadXLSX(excelFileName string) []ExtractedCell {
var out []ExtractedCell
alphs := alphas(2)
for _, l := range alphs {
fmt.Printf("Letter: %s", string(l))
}
xlFile, err := xlsx.OpenFile(excelFileName)
if err != nil {
fmt.Printf("Cannot open %s", excelFileName)
}
for _, sheet := range xlFile.Sheets {
for rowLidx, row := range sheet.Rows {
for colLidx, cell := range row.Cells {
ex := ExtractedCell{
cell: cell,
colLidx: string(alphs[colLidx]),
rowLidx: rowLidx + 1,
value: cell.Value}
out = append(out, ex)
text := cell.String()
log.Printf("Sheet: %s Row: %d Col: %q Value: %s\n",
sheet.Name, rowLidx, alphs[colLidx], text)
}
}
}
return out
}
|
