telegram/telegram.go

package telegram

import (
	"errors"
	"fmt"

	json "github.com/pquerna/ffjson/ffjson"
	http "github.com/valyala/fasthttp"
)

const (
	APIEndpoint  = "https://api.telegram.org/bot%s/%s"
	FileEndpoind = "https://api.telegram.org/file/bot%s/%s"
)

func (bot *Bot) request(dst []byte, method string, args *http.Args) (*Response, error) {
	_, resp, err := http.Post(dst, fmt.Sprintf(APIEndpoint, bot.AccessToken, method), args)
	if err != nil {
		return nil, err
	}

	var data Response
	if err := json.Unmarshal(resp, &data); err != nil {
		return nil, err
	}

	if !data.Ok {
		return &data, errors.New(data.Description)
	}

	return &data, nil
}

func (bot *Bot) upload(dst []byte, boundary, method string, args *http.Args) (*Response, error) {
	requestURI := fmt.Sprintf(APIEndpoint, bot.AccessToken, method)
	if &args != nil {
		requestURI += fmt.Sprint("?", args.String())
	}

	var req http.Request
	var resp http.Response

	req.Header.SetMethod("POST")
	req.Header.SetContentType("multipart/form-data")
	req.Header.SetMultipartFormBoundary(boundary)
	req.SetRequestURI(requestURI)
	req.SetBody(dst)

	if err := http.Do(&req, &resp); err != nil {
		return nil, err
	}

	var data Response
	if err := json.Unmarshal(resp.Body(), &data); err != nil {
		return nil, err
	}

	if !data.Ok {
		return nil, errors.New(data.Description)
	}

	return &data, nil
}