farmstar-survey-backend/pkg/telegram/telegram.go

package telegram

import (
	"context"
	"errors"

	"github.com/carlmjohnson/requests"
)

const (
	endpoint = "https://api.telegram.org"
)

type (
	TelegramClient struct {
		endpoint string
		chatID   string
	}

	MessageInput struct {
		ChatID string `json:"chat_id"`
		Text   string `json:"text"`
	}

	TgResponse struct {
		Ok bool `json:"ok"`
	}
)

func New(apiKey string) *TelegramClient {
	return &TelegramClient{
		endpoint: endpoint + "/bot" + apiKey + "/",
	}
}

func (tg *TelegramClient) SendMessage(ctx context.Context, payload MessageInput) (bool, error) {
	var resp TgResponse

	if err := requests.
		URL(tg.endpoint + "sendMessage").
		BodyJSON(&payload).
		ToJSON(&resp).
		Fetch(ctx); err != nil {
		return false, err
	}

	if !resp.Ok {
		return false, errors.New("telegram error")
	}

	return true, nil
}