89 lines
1.5 KiB
Go
89 lines
1.5 KiB
Go
package main
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import (
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e "codeberg.org/pebbe/errors"
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"encoding/json"
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"fmt"
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"os"
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"slices"
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"strconv"
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"strings"
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"time"
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)
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type Date struct {
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Week string `json:"week"`
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First string `json:"first"`
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Last string `json:"last"`
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}
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var (
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x = e.ExitErr
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dates = make([]Date, 0)
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)
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func main() {
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dirs, err := os.ReadDir("/net/corpora/nlnieuws/data/json")
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x(err)
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for _, dir := range dirs {
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if !dir.IsDir() {
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continue
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}
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dirname := dir.Name()
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if dirname[0] != '2' {
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continue
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}
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files, err := os.ReadDir("/net/corpora/nlnieuws/data/json/" + dirname)
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x(err)
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for _, file := range files {
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filename := file.Name()
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if strings.HasPrefix(filename, "DATA-") && strings.HasSuffix(filename, "-4.json") {
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addWeek(filename[5:12])
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}
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}
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}
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slices.Reverse(dates)
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b, err := json.Marshal(dates)
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x(err)
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fmt.Println(string(b))
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}
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func addWeek(s string) {
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week, err := strconv.Atoi(s[5:])
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x(err)
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year, err := strconv.Atoi(s[:4])
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x(err)
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// 1 januari
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t := time.Date(year, 1, 1, 12, 0, 0, 0, time.UTC)
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// zoek eerste donderdag
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day := int(t.Weekday()) // 0 = zondag
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donderdag := 4 - day
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if donderdag < 0 {
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donderdag = donderdag + 7
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}
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// schuif naar maandag voor eerste donderdag: donderdag - 3
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// in de gewenste week: 7 * (week - 1)
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t = t.AddDate(0, 0, donderdag-3+7*(week-1))
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t2 := t.AddDate(0, 0, 6)
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dates = append(dates, Date{
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Week: s,
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First: makeDate(t),
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Last: makeDate(t2),
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})
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}
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func makeDate(d time.Time) string {
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return fmt.Sprintf("%d-%02d-%02d", d.Year(), int(d.Month()), d.Day())
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}
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