telebot/api.go

package telebot

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

func api_getMe(token string) (User, error) {
	request := "https://api.telegram.org/bot" + token + "/getMe"

	resp, err := http.Get(request)
	if err != nil {
		return User{}, err
	}

	defer resp.Body.Close()
	me_json, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return User{}, err
	}

	var bot_info struct {
		Ok          bool
		Result      User
		Description string
	}

	err = json.Unmarshal(me_json, &bot_info)
	if err != nil {
		return User{}, err
	}

	if bot_info.Ok {
		return bot_info.Result, nil
	} else {
		return User{}, AuthError{bot_info.Description}
	}
}

func api_getUpdates(token string,
	offset int,
	updates chan<- Update) error {
	command := fmt.Sprintf("getUpdates?offset=%d", offset)
	request := "https://api.telegram.org/bot" + token + "/" + command

	resp, err := http.Get(request)
	if err != nil {
		return err
	}

	defer resp.Body.Close()
	updates_json, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return err
	}

	var updates_recieved struct {
		Ok          bool
		Result      []Update
		Description string
	}

	err = json.Unmarshal(updates_json, &updates_recieved)

	if !updates_recieved.Ok {
		log.Println(FetchError{updates_recieved.Description})
		return FetchError{updates_recieved.Description}
	}

	for _, update := range updates_recieved.Result {
		updates <- update
	}

	return nil
}