Add initial telegram support

1 files changed, 650 insertions, 0 deletions

diff --git a/vendor/github.com/go-telegram-bot-api/telegram-bot-api/bot.go b/vendor/github.com/go-telegram-bot-api/telegram-bot-api/bot.go
new file mode 100644
index 00000000..c7e473fb
--- /dev/null
+++ b/vendor/github.com/go-telegram-bot-api/telegram-bot-api/bot.go
@@ -0,0 +1,650 @@
+// Package tgbotapi has functions and types used for interacting with
+// the Telegram Bot API.
+package tgbotapi
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"github.com/technoweenie/multipartstreamer"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/url"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// BotAPI allows you to interact with the Telegram Bot API.
+type BotAPI struct {
+	Token  string       `json:"token"`
+	Debug  bool         `json:"debug"`
+	Self   User         `json:"-"`
+	Client *http.Client `json:"-"`
+}
+
+// NewBotAPI creates a new BotAPI instance.
+//
+// It requires a token, provided by @BotFather on Telegram.
+func NewBotAPI(token string) (*BotAPI, error) {
+	return NewBotAPIWithClient(token, &http.Client{})
+}
+
+// NewBotAPIWithClient creates a new BotAPI instance
+// and allows you to pass a http.Client.
+//
+// It requires a token, provided by @BotFather on Telegram.
+func NewBotAPIWithClient(token string, client *http.Client) (*BotAPI, error) {
+	bot := &BotAPI{
+		Token:  token,
+		Client: client,
+	}
+
+	self, err := bot.GetMe()
+	if err != nil {
+		return &BotAPI{}, err
+	}
+
+	bot.Self = self
+
+	return bot, nil
+}
+
+// MakeRequest makes a request to a specific endpoint with our token.
+func (bot *BotAPI) MakeRequest(endpoint string, params url.Values) (APIResponse, error) {
+	method := fmt.Sprintf(APIEndpoint, bot.Token, endpoint)
+
+	resp, err := bot.Client.PostForm(method, params)
+	if err != nil {
+		return APIResponse{}, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusForbidden {
+		return APIResponse{}, errors.New(ErrAPIForbidden)
+	}
+
+	bytes, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return APIResponse{}, err
+	}
+
+	if bot.Debug {
+		log.Println(endpoint, string(bytes))
+	}
+
+	var apiResp APIResponse
+	json.Unmarshal(bytes, &apiResp)
+
+	if !apiResp.Ok {
+		return APIResponse{}, errors.New(apiResp.Description)
+	}
+
+	return apiResp, nil
+}
+
+// makeMessageRequest makes a request to a method that returns a Message.
+func (bot *BotAPI) makeMessageRequest(endpoint string, params url.Values) (Message, error) {
+	resp, err := bot.MakeRequest(endpoint, params)
+	if err != nil {
+		return Message{}, err
+	}
+
+	var message Message
+	json.Unmarshal(resp.Result, &message)
+
+	bot.debugLog(endpoint, params, message)
+
+	return message, nil
+}
+
+// UploadFile makes a request to the API with a file.
+//
+// Requires the parameter to hold the file not be in the params.
+// File should be a string to a file path, a FileBytes struct,
+// or a FileReader struct.
+//
+// Note that if your FileReader has a size set to -1, it will read
+// the file into memory to calculate a size.
+func (bot *BotAPI) UploadFile(endpoint string, params map[string]string, fieldname string, file interface{}) (APIResponse, error) {
+	ms := multipartstreamer.New()
+	ms.WriteFields(params)
+
+	switch f := file.(type) {
+	case string:
+		fileHandle, err := os.Open(f)
+		if err != nil {
+			return APIResponse{}, err
+		}
+		defer fileHandle.Close()
+
+		fi, err := os.Stat(f)
+		if err != nil {
+			return APIResponse{}, err
+		}
+
+		ms.WriteReader(fieldname, fileHandle.Name(), fi.Size(), fileHandle)
+	case FileBytes:
+		buf := bytes.NewBuffer(f.Bytes)
+		ms.WriteReader(fieldname, f.Name, int64(len(f.Bytes)), buf)
+	case FileReader:
+		if f.Size != -1 {
+			ms.WriteReader(fieldname, f.Name, f.Size, f.Reader)
+
+			break
+		}
+
+		data, err := ioutil.ReadAll(f.Reader)
+		if err != nil {
+			return APIResponse{}, err
+		}
+
+		buf := bytes.NewBuffer(data)
+
+		ms.WriteReader(fieldname, f.Name, int64(len(data)), buf)
+	default:
+		return APIResponse{}, errors.New(ErrBadFileType)
+	}
+
+	method := fmt.Sprintf(APIEndpoint, bot.Token, endpoint)
+
+	req, err := http.NewRequest("POST", method, nil)
+	if err != nil {
+		return APIResponse{}, err
+	}
+
+	ms.SetupRequest(req)
+
+	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)
+
+	if !apiResp.Ok {
+		return APIResponse{}, errors.New(apiResp.Description)
+	}
+
+	return apiResp, nil
+}
+
+// GetFileDirectURL returns direct URL to file
+//
+// It requires the FileID.
+func (bot *BotAPI) GetFileDirectURL(fileID string) (string, error) {
+	file, err := bot.GetFile(FileConfig{fileID})
+
+	if err != nil {
+		return "", err
+	}
+
+	return file.Link(bot.Token), nil
+}
+
+// GetMe fetches the currently authenticated bot.
+//
+// This method is called upon creation to validate the token,
+// and so you may get this data from BotAPI.Self without the need for
+// another request.
+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)
+
+	bot.debugLog("getMe", nil, user)
+
+	return user, nil
+}
+
+// IsMessageToMe returns true if message directed to this bot.
+//
+// It requires the Message.
+func (bot *BotAPI) IsMessageToMe(message Message) bool {
+	return strings.Contains(message.Text, "@"+bot.Self.UserName)
+}
+
+// Send will send a Chattable item to Telegram.
+//
+// It requires the Chattable to send.
+func (bot *BotAPI) Send(c Chattable) (Message, error) {
+	switch c.(type) {
+	case Fileable:
+		return bot.sendFile(c.(Fileable))
+	default:
+		return bot.sendChattable(c)
+	}
+}
+
+// debugLog checks if the bot is currently running in debug mode, and if
+// so will display information about the request and response in the
+// debug log.
+func (bot *BotAPI) debugLog(context string, v url.Values, message interface{}) {
+	if bot.Debug {
+		log.Printf("%s req : %+v\n", context, v)
+		log.Printf("%s resp: %+v\n", context, message)
+	}
+}
+
+// sendExisting will send a Message with an existing file to Telegram.
+func (bot *BotAPI) sendExisting(method string, config Fileable) (Message, error) {
+	v, err := config.values()
+
+	if err != nil {
+		return Message{}, err
+	}
+
+	message, err := bot.makeMessageRequest(method, v)
+	if err != nil {
+		return Message{}, err
+	}
+
+	return message, nil
+}
+
+// uploadAndSend will send a Message with a new file to Telegram.
+func (bot *BotAPI) uploadAndSend(method string, config Fileable) (Message, error) {
+	params, err := config.params()
+	if err != nil {
+		return Message{}, err
+	}
+
+	file := config.getFile()
+
+	resp, err := bot.UploadFile(method, params, config.name(), file)
+	if err != nil {
+		return Message{}, err
+	}
+
+	var message Message
+	json.Unmarshal(resp.Result, &message)
+
+	bot.debugLog(method, nil, message)
+
+	return message, nil
+}
+
+// sendFile determines if the file is using an existing file or uploading
+// a new file, then sends it as needed.
+func (bot *BotAPI) sendFile(config Fileable) (Message, error) {
+	if config.useExistingFile() {
+		return bot.sendExisting(config.method(), config)
+	}
+
+	return bot.uploadAndSend(config.method(), config)
+}
+
+// sendChattable sends a Chattable.
+func (bot *BotAPI) sendChattable(config Chattable) (Message, error) {
+	v, err := config.values()
+	if err != nil {
+		return Message{}, err
+	}
+
+	message, err := bot.makeMessageRequest(config.method(), v)
+
+	if err != nil {
+		return Message{}, err
+	}
+
+	return message, nil
+}
+
+// GetUserProfilePhotos gets a user's profile photos.
+//
+// It requires UserID.
+// 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)
+
+	bot.debugLog("GetUserProfilePhoto", v, profilePhotos)
+
+	return profilePhotos, nil
+}
+
+// GetFile returns a File which can download a file from Telegram.
+//
+// Requires FileID.
+func (bot *BotAPI) GetFile(config FileConfig) (File, error) {
+	v := url.Values{}
+	v.Add("file_id", config.FileID)
+
+	resp, err := bot.MakeRequest("getFile", v)
+	if err != nil {
+		return File{}, err
+	}
+
+	var file File
+	json.Unmarshal(resp.Result, &file)
+
+	bot.debugLog("GetFile", v, file)
+
+	return file, nil
+}
+
+// GetUpdates fetches updates.
+// If a WebHook is set, this will not return any data!
+//
+// Offset, Limit, and Timeout are optional.
+// To avoid stale items, set Offset to one higher than the previous item.
+// Set Timeout to a large number to reduce requests so you can get updates
+// instantly instead of having to wait between requests.
+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)
+
+	bot.debugLog("getUpdates", v, updates)
+
+	return updates, nil
+}
+
+// RemoveWebhook unsets the webhook.
+func (bot *BotAPI) RemoveWebhook() (APIResponse, error) {
+	return bot.MakeRequest("setWebhook", url.Values{})
+}
+
+// SetWebhook sets a webhook.
+//
+// If this is set, GetUpdates will not get any data!
+//
+// If you do not have a legitimate TLS certificate, you need to include
+// your self signed certificate with the config.
+func (bot *BotAPI) SetWebhook(config WebhookConfig) (APIResponse, error) {
+	if config.Certificate == nil {
+		v := url.Values{}
+		v.Add("url", config.URL.String())
+
+		return bot.MakeRequest("setWebhook", v)
+	}
+
+	params := make(map[string]string)
+	params["url"] = config.URL.String()
+
+	resp, err := bot.UploadFile("setWebhook", params, "certificate", config.Certificate)
+	if err != nil {
+		return APIResponse{}, err
+	}
+
+	var apiResp APIResponse
+	json.Unmarshal(resp.Result, &apiResp)
+
+	if bot.Debug {
+		log.Printf("setWebhook resp: %+v\n", apiResp)
+	}
+
+	return apiResp, nil
+}
+
+// GetUpdatesChan starts and returns a channel for getting updates.
+func (bot *BotAPI) GetUpdatesChan(config UpdateConfig) (<-chan Update, error) {
+	updatesChan := make(chan Update, 100)
+
+	go func() {
+		for {
+			updates, err := bot.GetUpdates(config)
+			if err != nil {
+				log.Println(err)
+				log.Println("Failed to get updates, retrying in 3 seconds...")
+				time.Sleep(time.Second * 3)
+
+				continue
+			}
+
+			for _, update := range updates {
+				if update.UpdateID >= config.Offset {
+					config.Offset = update.UpdateID + 1
+					updatesChan <- update
+				}
+			}
+		}
+	}()
+
+	return updatesChan, nil
+}
+
+// ListenForWebhook registers a http handler for a webhook.
+func (bot *BotAPI) ListenForWebhook(pattern string) <-chan Update {
+	updatesChan := make(chan Update, 100)
+
+	http.HandleFunc(pattern, func(w http.ResponseWriter, r *http.Request) {
+		bytes, _ := ioutil.ReadAll(r.Body)
+
+		var update Update
+		json.Unmarshal(bytes, &update)
+
+		updatesChan <- update
+	})
+
+	return updatesChan
+}
+
+// AnswerInlineQuery sends a response to an inline query.
+//
+// Note that you must respond to an inline query within 30 seconds.
+func (bot *BotAPI) AnswerInlineQuery(config InlineConfig) (APIResponse, error) {
+	v := url.Values{}
+
+	v.Add("inline_query_id", config.InlineQueryID)
+	v.Add("cache_time", strconv.Itoa(config.CacheTime))
+	v.Add("is_personal", strconv.FormatBool(config.IsPersonal))
+	v.Add("next_offset", config.NextOffset)
+	data, err := json.Marshal(config.Results)
+	if err != nil {
+		return APIResponse{}, err
+	}
+	v.Add("results", string(data))
+	v.Add("switch_pm_text", config.SwitchPMText)
+	v.Add("switch_pm_parameter", config.SwitchPMParameter)
+
+	bot.debugLog("answerInlineQuery", v, nil)
+
+	return bot.MakeRequest("answerInlineQuery", v)
+}
+
+// AnswerCallbackQuery sends a response to an inline query callback.
+func (bot *BotAPI) AnswerCallbackQuery(config CallbackConfig) (APIResponse, error) {
+	v := url.Values{}
+
+	v.Add("callback_query_id", config.CallbackQueryID)
+	v.Add("text", config.Text)
+	v.Add("show_alert", strconv.FormatBool(config.ShowAlert))
+
+	bot.debugLog("answerCallbackQuery", v, nil)
+
+	return bot.MakeRequest("answerCallbackQuery", v)
+}
+
+// KickChatMember kicks a user from a chat. Note that this only will work
+// in supergroups, and requires the bot to be an admin. Also note they
+// will be unable to rejoin until they are unbanned.
+func (bot *BotAPI) KickChatMember(config ChatMemberConfig) (APIResponse, error) {
+	v := url.Values{}
+
+	if config.SuperGroupUsername == "" {
+		v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	} else {
+		v.Add("chat_id", config.SuperGroupUsername)
+	}
+	v.Add("user_id", strconv.Itoa(config.UserID))
+
+	bot.debugLog("kickChatMember", v, nil)
+
+	return bot.MakeRequest("kickChatMember", v)
+}
+
+// LeaveChat makes the bot leave the chat.
+func (bot *BotAPI) LeaveChat(config ChatConfig) (APIResponse, error) {
+	v := url.Values{}
+
+	if config.SuperGroupUsername == "" {
+		v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	} else {
+		v.Add("chat_id", config.SuperGroupUsername)
+	}
+
+	bot.debugLog("leaveChat", v, nil)
+
+	return bot.MakeRequest("leaveChat", v)
+}
+
+// GetChat gets information about a chat.
+func (bot *BotAPI) GetChat(config ChatConfig) (Chat, error) {
+	v := url.Values{}
+
+	if config.SuperGroupUsername == "" {
+		v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	} else {
+		v.Add("chat_id", config.SuperGroupUsername)
+	}
+
+	resp, err := bot.MakeRequest("getChat", v)
+	if err != nil {
+		return Chat{}, err
+	}
+
+	var chat Chat
+	err = json.Unmarshal(resp.Result, &chat)
+
+	bot.debugLog("getChat", v, chat)
+
+	return chat, err
+}
+
+// GetChatAdministrators gets a list of administrators in the chat.
+//
+// If none have been appointed, only the creator will be returned.
+// Bots are not shown, even if they are an administrator.
+func (bot *BotAPI) GetChatAdministrators(config ChatConfig) ([]ChatMember, error) {
+	v := url.Values{}
+
+	if config.SuperGroupUsername == "" {
+		v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	} else {
+		v.Add("chat_id", config.SuperGroupUsername)
+	}
+
+	resp, err := bot.MakeRequest("getChatAdministrators", v)
+	if err != nil {
+		return []ChatMember{}, err
+	}
+
+	var members []ChatMember
+	err = json.Unmarshal(resp.Result, &members)
+
+	bot.debugLog("getChatAdministrators", v, members)
+
+	return members, err
+}
+
+// GetChatMembersCount gets the number of users in a chat.
+func (bot *BotAPI) GetChatMembersCount(config ChatConfig) (int, error) {
+	v := url.Values{}
+
+	if config.SuperGroupUsername == "" {
+		v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	} else {
+		v.Add("chat_id", config.SuperGroupUsername)
+	}
+
+	resp, err := bot.MakeRequest("getChatMembersCount", v)
+	if err != nil {
+		return -1, err
+	}
+
+	var count int
+	err = json.Unmarshal(resp.Result, &count)
+
+	bot.debugLog("getChatMembersCount", v, count)
+
+	return count, err
+}
+
+// GetChatMember gets a specific chat member.
+func (bot *BotAPI) GetChatMember(config ChatConfigWithUser) (ChatMember, error) {
+	v := url.Values{}
+
+	if config.SuperGroupUsername == "" {
+		v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	} else {
+		v.Add("chat_id", config.SuperGroupUsername)
+	}
+	v.Add("user_id", strconv.Itoa(config.UserID))
+
+	resp, err := bot.MakeRequest("getChatMember", v)
+	if err != nil {
+		return ChatMember{}, err
+	}
+
+	var member ChatMember
+	err = json.Unmarshal(resp.Result, &member)
+
+	bot.debugLog("getChatMember", v, member)
+
+	return member, err
+}
+
+// UnbanChatMember unbans a user from a chat. Note that this only will work
+// in supergroups, and requires the bot to be an admin.
+func (bot *BotAPI) UnbanChatMember(config ChatMemberConfig) (APIResponse, error) {
+	v := url.Values{}
+
+	if config.SuperGroupUsername == "" {
+		v.Add("chat_id", strconv.FormatInt(config.ChatID, 10))
+	} else {
+		v.Add("chat_id", config.SuperGroupUsername)
+	}
+	v.Add("user_id", strconv.Itoa(config.UserID))
+
+	bot.debugLog("unbanChatMember", v, nil)
+
+	return bot.MakeRequest("unbanChatMember", v)
+}