google-api-calendar-holidays.go

package main

import (
	"cmp"
	"context"
	"fmt"
	"slices"
	"time"

	_ "github.com/joho/godotenv/autoload"
	"google.golang.org/api/calendar/v3"
)

func main() {
	ctx := context.Background()
	svc, err := calendar.NewService(ctx)
	if err != nil {
		panic(err)
	}

	res, err := svc.Events.
		List("es-419.pe#[email protected]").
		Fields("items(summary,start(date))").
		TimeMin(fmt.Sprintf("%d-01-01T00:00:00Z", time.Now().Year())).
		TimeMax(fmt.Sprintf("%d-12-31T23:59:59Z", time.Now().Year())).
		Do()
	if err != nil {
		panic(err)
	}

	slices.SortStableFunc(res.Items, func(a, b *calendar.Event) int {
		return cmp.Compare(a.Start.Date+"|"+a.Summary, b.Start.Date+"|"+b.Summary)
	})
	for _, event := range res.Items {
		fmt.Println(event.Start.Date, "|", event.Summary)
	}
}