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Conversion of the "PRO Prisundersökning" from XLSX to CSV, JSON,NDJSON
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package main | |
import ( | |
"encoding/csv" | |
"encoding/json" | |
"flag" | |
"fmt" | |
"io" | |
"net/http" | |
"os" | |
"strconv" | |
"strings" | |
"time" | |
"github.com/xuri/excelize/v2" | |
) | |
const ( | |
defaultRawurl = "https://pro.se/download/18.8d3d3b4187083b364113f70/1679655215923/PRO%20prisunders%C3%B6kning%202022%20Butikslista%20hela%20landet_20230324.xlsx" | |
defaultFormat = "json" | |
) | |
func main() { | |
if err := run(os.Args, os.Stdout); err != nil { | |
fmt.Fprintf(os.Stderr, "%s\n", err) | |
os.Exit(1) | |
} | |
} | |
func run(args []string, stdout io.Writer) error { | |
rawurl, format, err := parseArgs(args) | |
if err != nil { | |
return err | |
} | |
client := &http.Client{Timeout: 10 * time.Second} | |
f, err := getRemoteFile(rawurl, client) | |
if err != nil { | |
return err | |
} | |
rows, err := f.Rows("Alla") | |
if err != nil { | |
return err | |
} | |
var records [][]string | |
for rows.Next() { | |
row, err := rows.Columns() | |
if err != nil { | |
return err | |
} | |
records = append(records, row) | |
} | |
enc := json.NewEncoder(stdout) | |
switch format { | |
case "csv": | |
csv.NewWriter(stdout).WriteAll(records) | |
case "json": | |
enc.SetIndent("", " ") | |
enc.Encode(convertToButiker(records)) | |
case "ndjson": | |
for _, butik := range convertToButiker(records) { | |
enc.Encode(butik) | |
} | |
default: | |
return fmt.Errorf("unknown format") | |
} | |
return nil | |
} | |
type butik struct { | |
Butiksnamn string `json:"butiksnamn"` | |
Distrikt string `json:"distrikt"` | |
Typ string `json:"typ"` | |
AntalVaror int `json:"antal_varor"` | |
Total float64 `json:"total"` | |
Varor []vara `json:"varor"` | |
} | |
func convertToButiker(records [][]string) []butik { | |
var butiker []butik | |
if len(records) == 0 { | |
return nil | |
} | |
for _, row := range records[1:] { | |
if len(row) < 5 { | |
continue | |
} | |
antalVaror, err := strconv.Atoi(row[3]) | |
if err != nil { | |
continue | |
} | |
total, err := strconv.ParseFloat(row[4], 64) | |
if err != nil { | |
continue | |
} | |
varor, err := parseVaror(records[0][5:], row[5:]) | |
if err != nil { | |
continue | |
} | |
butiker = append(butiker, butik{ | |
Butiksnamn: row[0], | |
Distrikt: row[1], | |
Typ: row[2], | |
AntalVaror: antalVaror, | |
Total: total, | |
Varor: varor, | |
}) | |
} | |
return butiker | |
} | |
type vara struct { | |
Namn string `json:"namn"` | |
Pris float64 `json:"pris"` | |
} | |
func parseVaror(headings, columns []string) ([]vara, error) { | |
var varor []vara | |
for i, v := range columns { | |
_, namn, found := strings.Cut(headings[i], ". ") | |
if !found { | |
return nil, fmt.Errorf("unexpected name") | |
} | |
pris, err := strconv.ParseFloat(v, 64) | |
if err != nil { | |
return nil, err | |
} | |
varor = append(varor, vara{ | |
Namn: namn, | |
Pris: pris, | |
}) | |
} | |
return varor, nil | |
} | |
func getRemoteFile(rawurl string, client *http.Client) (*excelize.File, error) { | |
resp, err := client.Get(rawurl) | |
if err != nil { | |
return nil, err | |
} | |
defer resp.Body.Close() | |
return excelize.OpenReader(resp.Body) | |
} | |
func parseArgs(args []string) (rawurl, format string, err error) { | |
flags := flag.NewFlagSet(args[0], flag.ExitOnError) | |
flags.StringVar(&rawurl, "rawurl", defaultRawurl, "The URL to the PRO Prisundersökning .xlsx to be parsed") | |
flags.StringVar(&format, "format", defaultFormat, "The format to use for the output (json/ndjson/csv)") | |
if err := flags.Parse(args[1:]); err != nil { | |
return "", "", err | |
} | |
return rawurl, format, nil | |
} |
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Data from the 2023 report