73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
// Package formatter contains a helper to format the date of a birthday
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// into a notification text
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package formatter
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import (
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"bytes"
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"fmt"
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"os"
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"regexp"
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"strings"
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"text/template"
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"time"
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"git.luzifer.io/luzifer/birthday-notifier/pkg/dateutil"
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"github.com/emersion/go-vcard"
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)
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const timeDay = 24 * time.Hour
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var (
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defaultTemplate = regexp.MustCompile(`\s+`).ReplaceAllString(strings.TrimSpace(strings.ReplaceAll(`
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{{ .contact | getName }} has their birthday {{ if .when | isToday -}} today {{- else -}} on {{ (.when | projectToNext).Format "Mon, 02 Jan" }} {{- end }}.
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{{ if gt .when.Year 1 -}}They are turning {{ .when | getAge }}.{{- end }}
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`, "\n", " ")), " ")
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notifyTpl *template.Template
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)
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func init() {
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rawTpl := defaultTemplate
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if tpl := os.Getenv("NOTIFICATION_TEMPLATE"); tpl != "" {
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rawTpl = tpl
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}
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var err error
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notifyTpl, err = template.New("notification").Funcs(template.FuncMap{
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"getAge": getAge,
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"getName": getContactName,
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"isToday": dateutil.IsToday,
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"projectToNext": dateutil.ProjectToNextBirthday,
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}).Parse(rawTpl)
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if err != nil {
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panic(fmt.Errorf("parsing notification template: %w", err))
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}
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}
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// FormatNotificationText takes the notification template and renders
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// the contact / birthday date into a text to submit in the notification
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func FormatNotificationText(contact vcard.Card, when time.Time) (text string, err error) {
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buf := new(bytes.Buffer)
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if err = notifyTpl.Execute(buf, map[string]any{
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"contact": contact,
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"when": when,
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}); err != nil {
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return "", fmt.Errorf("executing template: %w", err)
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}
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return buf.String(), nil
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}
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func getAge(t time.Time) int {
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return dateutil.ProjectToNextBirthday(t).Year() - t.Year()
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}
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func getContactName(contact vcard.Card) string {
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if contact.Name() != nil && contact.Name().GivenName != "" {
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return contact.Name().GivenName
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}
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return contact.FormattedNames()[0].Value
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}
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