telegram-bot-api/methods.go

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package tgbotapi
import (
"encoding/json"
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"errors"
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"strconv"
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"github.com/technoweenie/multipartstreamer"
)
// Telegram constants
const (
// APIEndpoint is the endpoint for all API methods, with formatting for Sprintf
APIEndpoint = "https://api.telegram.org/bot%s/%s"
)
// Constant values for ChatActions
const (
ChatTyping = "typing"
ChatUploadPhoto = "upload_photo"
ChatRecordVideo = "record_video"
ChatUploadVideo = "upload_video"
ChatRecordAudio = "record_audio"
ChatUploadAudio = "upload_audio"
ChatUploadDocument = "upload_document"
ChatFindLocation = "find_location"
)
// API errors
const (
// APIForbidden happens when a token is bad
APIForbidden = "forbidden"
)
// MessageConfig contains information about a SendMessage request.
type MessageConfig struct {
ChatID int
Text string
DisableWebPagePreview bool
ReplyToMessageID int
ReplyMarkup interface{}
}
// ForwardConfig contains information about a ForwardMessage request.
type ForwardConfig struct {
ChatID int
FromChatID int
MessageID int
}
// PhotoConfig contains information about a SendPhoto request.
type PhotoConfig struct {
ChatID int
Caption string
ReplyToMessageID int
ReplyMarkup interface{}
UseExistingPhoto bool
FilePath string
FileID string
}
// AudioConfig contains information about a SendAudio request.
type AudioConfig struct {
ChatID int
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Duration int
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Performer string
Title string
ReplyToMessageID int
ReplyMarkup interface{}
UseExistingAudio bool
FilePath string
FileID string
}
// DocumentConfig contains information about a SendDocument request.
type DocumentConfig struct {
ChatID int
ReplyToMessageID int
ReplyMarkup interface{}
UseExistingDocument bool
FilePath string
FileID string
}
// StickerConfig contains information about a SendSticker request.
type StickerConfig struct {
ChatID int
ReplyToMessageID int
ReplyMarkup interface{}
UseExistingSticker bool
FilePath string
FileID string
}
// VideoConfig contains information about a SendVideo request.
type VideoConfig struct {
ChatID int
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Duration int
Caption string
ReplyToMessageID int
ReplyMarkup interface{}
UseExistingVideo bool
FilePath string
FileID string
}
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// VoiceConfig contains information about a SendVoice request.
type VoiceConfig struct {
ChatID int
Duration int
ReplyToMessageID int
ReplyMarkup interface{}
UseExistingVoice bool
FilePath string
FileID string
}
// LocationConfig contains information about a SendLocation request.
type LocationConfig struct {
ChatID int
Latitude float64
Longitude float64
ReplyToMessageID int
ReplyMarkup interface{}
}
// ChatActionConfig contains information about a SendChatAction request.
type ChatActionConfig struct {
ChatID int
Action string
}
// UserProfilePhotosConfig contains information about a GetUserProfilePhotos request.
type UserProfilePhotosConfig struct {
UserID int
Offset int
Limit int
}
// UpdateConfig contains information about a GetUpdates request.
type UpdateConfig struct {
Offset int
Limit int
Timeout int
}
// WebhookConfig contains information about a SetWebhook request.
type WebhookConfig struct {
Clear bool
URL *url.URL
}
// MakeRequest makes a request to a specific endpoint with our token.
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// All requests are POSTs because Telegram doesn't care, and it's easier.
func (bot *BotAPI) MakeRequest(endpoint string, params url.Values) (APIResponse, error) {
resp, err := bot.Client.PostForm(fmt.Sprintf(APIEndpoint, bot.Token, endpoint), params)
if err != nil {
return APIResponse{}, err
}
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defer resp.Body.Close()
if resp.StatusCode == http.StatusForbidden {
return APIResponse{}, errors.New(APIForbidden)
}
bytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return APIResponse{}, err
}
if bot.Debug {
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log.Println(endpoint, string(bytes))
}
var apiResp APIResponse
json.Unmarshal(bytes, &apiResp)
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if !apiResp.Ok {
return APIResponse{}, errors.New(apiResp.Description)
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}
return apiResp, nil
}
// UploadFile makes a request to the API with a file.
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//
// Requires the parameter to hold the file not be in the params.
func (bot *BotAPI) UploadFile(endpoint string, params map[string]string, fieldname string, filename string) (APIResponse, error) {
f, err := os.Open(filename)
if err != nil {
return APIResponse{}, err
}
defer f.Close()
fi, err := os.Stat(filename)
if err != nil {
return APIResponse{}, err
}
ms := multipartstreamer.New()
ms.WriteFields(params)
ms.WriteReader(fieldname, f.Name(), fi.Size(), f)
req, err := http.NewRequest("POST", fmt.Sprintf(APIEndpoint, bot.Token, endpoint), nil)
ms.SetupRequest(req)
if err != nil {
return APIResponse{}, err
}
res, err := bot.Client.Do(req)
if err != nil {
return APIResponse{}, err
}
defer res.Body.Close()
bytes, err := ioutil.ReadAll(res.Body)
if err != nil {
return APIResponse{}, err
}
if bot.Debug {
log.Println(string(bytes[:]))
}
var apiResp APIResponse
json.Unmarshal(bytes, &apiResp)
return apiResp, nil
}
// GetMe fetches the currently authenticated bot.
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//
// There are no parameters for this method.
func (bot *BotAPI) GetMe() (User, error) {
resp, err := bot.MakeRequest("getMe", nil)
if err != nil {
return User{}, err
}
var user User
json.Unmarshal(resp.Result, &user)
if bot.Debug {
log.Printf("getMe: %+v\n", user)
}
return user, nil
}
// SendMessage sends a Message to a chat.
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//
// Requires ChatID and Text.
// DisableWebPagePreview, ReplyToMessageID, and ReplyMarkup are optional.
func (bot *BotAPI) SendMessage(config MessageConfig) (Message, error) {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("text", config.Text)
v.Add("disable_web_page_preview", strconv.FormatBool(config.DisableWebPagePreview))
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ReplyToMessageID))
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
resp, err := bot.MakeRequest("SendMessage", v)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("SendMessage req : %+v\n", v)
log.Printf("SendMessage resp: %+v\n", message)
}
return message, nil
}
// ForwardMessage forwards a message from one chat to another.
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//
// Requires ChatID (destination), FromChatID (source), and MessageID.
func (bot *BotAPI) ForwardMessage(config ForwardConfig) (Message, error) {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("from_chat_id", strconv.Itoa(config.FromChatID))
v.Add("message_id", strconv.Itoa(config.MessageID))
resp, err := bot.MakeRequest("forwardMessage", v)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("forwardMessage req : %+v\n", v)
log.Printf("forwardMessage resp: %+v\n", message)
}
return message, nil
}
// SendPhoto sends or uploads a photo to a chat.
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//
// Requires ChatID and FileID OR FilePath.
// Caption, ReplyToMessageID, and ReplyMarkup are optional.
func (bot *BotAPI) SendPhoto(config PhotoConfig) (Message, error) {
if config.UseExistingPhoto {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("photo", config.FileID)
if config.Caption != "" {
v.Add("caption", config.Caption)
}
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ChatID))
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
resp, err := bot.MakeRequest("SendPhoto", v)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("SendPhoto req : %+v\n", v)
log.Printf("SendPhoto resp: %+v\n", message)
}
return message, nil
}
params := make(map[string]string)
params["chat_id"] = strconv.Itoa(config.ChatID)
if config.Caption != "" {
params["caption"] = config.Caption
}
if config.ReplyToMessageID != 0 {
params["reply_to_message_id"] = strconv.Itoa(config.ReplyToMessageID)
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
params["reply_markup"] = string(data)
}
resp, err := bot.UploadFile("SendPhoto", params, "photo", config.FilePath)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("SendPhoto resp: %+v\n", message)
}
return message, nil
}
// SendAudio sends or uploads an audio clip to a chat.
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// If using a file, the file must be in the .mp3 format.
//
// when the fields title and performer are both empty
// and the mime-type of the file to be sent is not audio/mpeg,
// the file must be in an .ogg file encoded with OPUS.
// You may use the tgutils.EncodeAudio func to assist you with this, if needed.
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//
// Requires ChatID and FileID OR FilePath.
// ReplyToMessageID and ReplyMarkup are optional.
func (bot *BotAPI) SendAudio(config AudioConfig) (Message, error) {
if config.UseExistingAudio {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("audio", config.FileID)
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ReplyToMessageID))
}
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if config.Duration != 0 {
v.Add("duration", strconv.Itoa(config.Duration))
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
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if config.Performer != "" {
v.Add("performer", config.Performer)
}
if config.Title != "" {
v.Add("title", config.Title)
}
resp, err := bot.MakeRequest("sendAudio", v)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("sendAudio req : %+v\n", v)
log.Printf("sendAudio resp: %+v\n", message)
}
return message, nil
}
params := make(map[string]string)
params["chat_id"] = strconv.Itoa(config.ChatID)
if config.ReplyToMessageID != 0 {
params["reply_to_message_id"] = strconv.Itoa(config.ReplyToMessageID)
}
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if config.Duration != 0 {
params["duration"] = strconv.Itoa(config.Duration)
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
params["reply_markup"] = string(data)
}
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if config.Performer != "" {
params["performer"] = config.Performer
}
if config.Title != "" {
params["title"] = config.Title
}
resp, err := bot.UploadFile("sendAudio", params, "audio", config.FilePath)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("sendAudio resp: %+v\n", message)
}
return message, nil
}
// SendDocument sends or uploads a document to a chat.
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//
// Requires ChatID and FileID OR FilePath.
// ReplyToMessageID and ReplyMarkup are optional.
func (bot *BotAPI) SendDocument(config DocumentConfig) (Message, error) {
if config.UseExistingDocument {
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v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("document", config.FileID)
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ReplyToMessageID))
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}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
resp, err := bot.MakeRequest("sendDocument", v)
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if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
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log.Printf("sendDocument req : %+v\n", v)
log.Printf("sendDocument resp: %+v\n", message)
}
return message, nil
}
params := make(map[string]string)
params["chat_id"] = strconv.Itoa(config.ChatID)
if config.ReplyToMessageID != 0 {
params["reply_to_message_id"] = strconv.Itoa(config.ReplyToMessageID)
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}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
params["reply_markup"] = string(data)
}
resp, err := bot.UploadFile("sendDocument", params, "document", config.FilePath)
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if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
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log.Printf("sendDocument resp: %+v\n", message)
}
return message, nil
}
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// SendVoice sends or uploads a playable voice to a chat.
// If using a file, the file must be encoded as an .ogg with OPUS.
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// You may use the tgutils.EncodeAudio func to assist you with this, if needed.
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//
// Requires ChatID and FileID OR FilePath.
// ReplyToMessageID and ReplyMarkup are optional.
func (bot *BotAPI) SendVoice(config VoiceConfig) (Message, error) {
if config.UseExistingVoice {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("voice", config.FileID)
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ReplyToMessageID))
}
if config.Duration != 0 {
v.Add("duration", strconv.Itoa(config.Duration))
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
resp, err := bot.MakeRequest("sendVoice", v)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("SendVoice req : %+v\n", v)
log.Printf("SendVoice resp: %+v\n", message)
}
return message, nil
}
params := make(map[string]string)
params["chat_id"] = strconv.Itoa(config.ChatID)
if config.ReplyToMessageID != 0 {
params["reply_to_message_id"] = strconv.Itoa(config.ReplyToMessageID)
}
if config.Duration != 0 {
params["duration"] = strconv.Itoa(config.Duration)
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
params["reply_markup"] = string(data)
}
resp, err := bot.UploadFile("SendVoice", params, "voice", config.FilePath)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("SendVoice resp: %+v\n", message)
}
return message, nil
}
// SendSticker sends or uploads a sticker to a chat.
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//
// Requires ChatID and FileID OR FilePath.
// ReplyToMessageID and ReplyMarkup are optional.
func (bot *BotAPI) SendSticker(config StickerConfig) (Message, error) {
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if config.UseExistingSticker {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("sticker", config.FileID)
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ReplyToMessageID))
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}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
resp, err := bot.MakeRequest("sendSticker", v)
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if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
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log.Printf("sendSticker req : %+v\n", v)
log.Printf("sendSticker resp: %+v\n", message)
}
return message, nil
}
params := make(map[string]string)
params["chat_id"] = strconv.Itoa(config.ChatID)
if config.ReplyToMessageID != 0 {
params["reply_to_message_id"] = strconv.Itoa(config.ReplyToMessageID)
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}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
params["reply_markup"] = string(data)
}
resp, err := bot.UploadFile("sendSticker", params, "sticker", config.FilePath)
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if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
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log.Printf("sendSticker resp: %+v\n", message)
}
return message, nil
}
// SendVideo sends or uploads a video to a chat.
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//
// Requires ChatID and FileID OR FilePath.
// ReplyToMessageID and ReplyMarkup are optional.
func (bot *BotAPI) SendVideo(config VideoConfig) (Message, error) {
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if config.UseExistingVideo {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("video", config.FileID)
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ReplyToMessageID))
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}
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if config.Duration != 0 {
v.Add("duration", strconv.Itoa(config.Duration))
}
if config.Caption != "" {
v.Add("caption", config.Caption)
}
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if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
resp, err := bot.MakeRequest("sendVideo", v)
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if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
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log.Printf("sendVideo req : %+v\n", v)
log.Printf("sendVideo resp: %+v\n", message)
}
return message, nil
}
params := make(map[string]string)
params["chat_id"] = strconv.Itoa(config.ChatID)
if config.ReplyToMessageID != 0 {
params["reply_to_message_id"] = strconv.Itoa(config.ReplyToMessageID)
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}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
params["reply_markup"] = string(data)
}
resp, err := bot.UploadFile("sendVideo", params, "video", config.FilePath)
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if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
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log.Printf("sendVideo resp: %+v\n", message)
}
return message, nil
}
// SendLocation sends a location to a chat.
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//
// Requires ChatID, Latitude, and Longitude.
// ReplyToMessageID and ReplyMarkup are optional.
func (bot *BotAPI) SendLocation(config LocationConfig) (Message, error) {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("latitude", strconv.FormatFloat(config.Latitude, 'f', 6, 64))
v.Add("longitude", strconv.FormatFloat(config.Longitude, 'f', 6, 64))
if config.ReplyToMessageID != 0 {
v.Add("reply_to_message_id", strconv.Itoa(config.ReplyToMessageID))
}
if config.ReplyMarkup != nil {
data, err := json.Marshal(config.ReplyMarkup)
if err != nil {
return Message{}, err
}
v.Add("reply_markup", string(data))
}
resp, err := bot.MakeRequest("sendLocation", v)
if err != nil {
return Message{}, err
}
var message Message
json.Unmarshal(resp.Result, &message)
if bot.Debug {
log.Printf("sendLocation req : %+v\n", v)
log.Printf("sendLocation resp: %+v\n", message)
}
return message, nil
}
// SendChatAction sets a current action in a chat.
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//
// Requires ChatID and a valid Action (see Chat constants).
func (bot *BotAPI) SendChatAction(config ChatActionConfig) error {
v := url.Values{}
v.Add("chat_id", strconv.Itoa(config.ChatID))
v.Add("action", config.Action)
_, err := bot.MakeRequest("sendChatAction", v)
if err != nil {
return err
}
return nil
}
// GetUserProfilePhotos gets a user's profile photos.
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//
// Requires UserID.
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// Offset and Limit are optional.
func (bot *BotAPI) GetUserProfilePhotos(config UserProfilePhotosConfig) (UserProfilePhotos, error) {
v := url.Values{}
v.Add("user_id", strconv.Itoa(config.UserID))
if config.Offset != 0 {
v.Add("offset", strconv.Itoa(config.Offset))
}
if config.Limit != 0 {
v.Add("limit", strconv.Itoa(config.Limit))
}
resp, err := bot.MakeRequest("getUserProfilePhotos", v)
if err != nil {
return UserProfilePhotos{}, err
}
var profilePhotos UserProfilePhotos
json.Unmarshal(resp.Result, &profilePhotos)
if bot.Debug {
log.Printf("getUserProfilePhotos req : %+v\n", v)
log.Printf("getUserProfilePhotos resp: %+v\n", profilePhotos)
}
return profilePhotos, nil
}
// GetUpdates fetches updates.
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// If a WebHook is set, this will not return any data!
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//
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// Offset, Limit, and Timeout are optional.
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// To not get old items, set Offset to one higher than the previous item.
// Set Timeout to a large number to reduce requests and get responses instantly.
func (bot *BotAPI) GetUpdates(config UpdateConfig) ([]Update, error) {
v := url.Values{}
if config.Offset > 0 {
v.Add("offset", strconv.Itoa(config.Offset))
}
if config.Limit > 0 {
v.Add("limit", strconv.Itoa(config.Limit))
}
if config.Timeout > 0 {
v.Add("timeout", strconv.Itoa(config.Timeout))
}
resp, err := bot.MakeRequest("getUpdates", v)
if err != nil {
return []Update{}, err
}
var updates []Update
json.Unmarshal(resp.Result, &updates)
if bot.Debug {
log.Printf("getUpdates: %+v\n", updates)
}
return updates, nil
}
// SetWebhook sets a webhook.
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// If this is set, GetUpdates will not get any data!
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//
// Requires Url OR to set Clear to true.
func (bot *BotAPI) SetWebhook(config WebhookConfig) (APIResponse, error){
v := url.Values{}
if !config.Clear {
v.Add("url", config.URL.String())
}
return bot.MakeRequest("setWebhook", v)
}