bh notifier bot in go

bh-notifier-go.go

package main

import (
	"fmt"
	"github.com/go-co-op/gocron"
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
	"time"
)

import (
	"encoding/csv"
	"net/http"
)

var (
	location       = time.FixedZone("Europe/Kiev", +3*60*60)
	chatId   int64 = 000
	token          = "[bot token]"
	layout         = "1/2/2006 3:04:05"
	csvLink        = "https://docs.google.com/spreadsheets/d/[sheet-id]/gviz/tq?tqx=out:csv&sheet=Sh1"
)

func main() {
	bot, _ := tgbotapi.NewBotAPI(token)
	s := gocron.NewScheduler(time.UTC)

	_, _ = s.Every(1).Day().At("21:00").Do(task(bot, 0))
	_, _ = s.Every(1).Day().At("23:00").Do(task(bot, 0))
	_, _ = s.Every(1).Day().At("01:00").Do(task(bot, -1))

	s.StartBlocking()
}

func task(bot *tgbotapi.BotAPI, delta int) func() {
	return func() {
		lastSubmissionDate := getLastSubmissionDate()
		date := time.Now().In(location).Add(time.Hour * 24 * time.Duration(delta))
		if lastSubmissionDate.Year() < date.Year() ||
			(lastSubmissionDate.Year() == date.Year() && lastSubmissionDate.YearDay() < date.YearDay()) {
			msg := tgbotapi.NewMessage(chatId, fmt.Sprintf("Please, send your form for %s", date.Format("`2/1/2006`")))
			_, _ = bot.Send(msg)
		}
	}
}

func getLastSubmissionDate() time.Time {
	res, _ := http.Get(csvLink)
	records, _ := csv.NewReader(res.Body).ReadAll()
	lastDate := records[len(records)-1][1]
	parse, _ := time.ParseInLocation(layout, lastDate, location)
	return parse
}