/
main.go
151 lines (136 loc) · 2.56 KB
/
main.go
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package main
import (
"encoding/csv"
"fmt"
"io"
"log"
"os"
"strconv"
)
type information struct {
date string
open float64
high float64
low float64
closeData float64
volume int64
adjClose float64
}
func parseHeader(row []string) map[string]int {
columns := map[string]int{}
for i, v := range row {
columns[v] = i
}
return columns
}
func parseRow(columns map[string]int, row []string) (*information, error) {
date := row[columns["Date"]]
data := row[columns["Open"]]
open, err := strconv.ParseFloat(data, 64)
if err != nil {
return nil, err
}
data = row[columns["High"]]
high, err := strconv.ParseFloat(data, 64)
if err != nil {
return nil, err
}
data = row[columns["Low"]]
low, err := strconv.ParseFloat(data, 64)
if err != nil {
return nil, err
}
data = row[columns["Close"]]
closeData, err := strconv.ParseFloat(data, 64)
if err != nil {
return nil, err
}
data = row[columns["Volume"]]
volume, err := strconv.ParseInt(data, 10, 64)
if err != nil {
return nil, err
}
data = row[columns["Adj Close"]]
adjClose, err := strconv.ParseFloat(data, 64)
if err != nil {
return nil, err
}
return &information{
date: date,
open: open,
high: high,
low: low,
closeData: closeData,
volume: volume,
adjClose: adjClose,
}, nil
}
func readTable(rdr io.Reader) ([]information, error) {
csvReader := csv.NewReader(rdr)
var columns map[string]int
info := []information{}
for i := 0; ; i++ {
row, err := csvReader.Read()
if err == io.EOF {
break
} else if err != nil {
return nil, err
}
if i == 0 {
columns = parseHeader(row)
} else {
newData, err := parseRow(columns, row)
if err != nil {
return nil, err
}
info = append(info, *newData)
}
}
return info, nil
}
func main() {
file, err := os.Open("table.csv")
if err != nil {
log.Fatalln(err.Error())
}
defer file.Close()
info, err := readTable(file)
if err != nil {
log.Fatalln(err.Error())
}
fmt.Println(`<!DOCTYPE html>
<html>
<head>
<style>
td {
padding: 7px;
}
</style>
</head>
<body>
<table border="1">
<tr>
<th>Date</th>
<th>Open</th>
<th>High</th>
<th>Low</th>
<th>Close</th>
<th>Volume</th>
<th>Adj Close</th>
</tr>`)
for _, v := range info {
fmt.Printf(` <tr>
<td>%s</td>
<td>%f</td>
<td>%f</td>
<td>%f</td>
<td>%f</td>
<td>%d</td>
<td>%f</td>
</tr>
`, v.date, v.open, v.high, v.low, v.closeData, v.volume, v.adjClose)
}
fmt.Println(` </table>
</body>
</html>`)
}