A bot.go

@@ -0,0 +1,109 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"io/ioutil"
+	"log"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	Token string `json:"token"`
+}
+
+type Plugin interface {
+	GetCommand() string
+	GotCommand(Message, []string)
+}
+
+type ColonThree struct {
+}
+
+func (plugin *ColonThree) GetCommand() string {
+	return "/three"
+}
+
+func (plugin *ColonThree) GotCommand(message Message, args []string) {
+	if len(args) > 0 {
+		n, err := strconv.Atoi(args[0])
+		if err != nil {
+			msg := NewMessage(message.Chat.Id, "Bad number!")
+			msg.ReplyToMessageId = message.MessageId
+
+			bot.sendMessage(msg)
+
+			return
+		}
+
+		if n > 5 {
+			msg := NewMessage(message.Chat.Id, "That's a bit much, no?")
+			msg.ReplyToMessageId = message.MessageId
+
+			bot.sendMessage(msg)
+
+			return
+		}
+
+		for i := 0; i < n; i++ {
+			bot.sendMessage(NewMessage(message.Chat.Id, ":3"))
+		}
+	} else {
+		bot.sendMessage(NewMessage(message.Chat.Id, ":3"))
+	}
+}
+
+var bot *BotApi
+
+func main() {
+	configPath := flag.String("config", "config.json", "path to config.json")
+
+	flag.Parse()
+
+	data, err := ioutil.ReadFile(*configPath)
+	if err != nil {
+		log.Panic(err)
+	}
+
+	var cfg Config
+	json.Unmarshal(data, &cfg)
+
+	bot = NewBotApi(BotConfig{
+		token: cfg.Token,
+		debug: true,
+	})
+
+	plugins := []Plugin{&ColonThree{}}
+
+	ticker := time.NewTicker(5 * time.Second)
+
+	lastUpdate := 0
+
+	for range ticker.C {
+		updates, err := bot.getUpdates(NewUpdate(lastUpdate + 1))
+
+		if err != nil {
+			log.Panic(err)
+		}
+
+		for _, update := range updates {
+			lastUpdate = update.UpdateId
+
+			if update.Message.Text == "" {
+				continue
+			}
+
+			for _, plugin := range plugins {
+				parts := strings.Split(update.Message.Text, " ")
+
+				if plugin.GetCommand() == parts[0] {
+					parts = append(parts[:0], parts[1:]...)
+
+					plugin.GotCommand(update.Message, parts)
+				}
+			}
+		}
+	}
+}

A methods.go

@@ -0,0 +1,443 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/url"
+	"strconv"
+)
+
+const (
+	CHAT_TYPING          = "typing"
+	CHAT_UPLOAD_PHOTO    = "upload_photo"
+	CHAT_RECORD_VIDEO    = "record_video"
+	CHAT_UPLOAD_VIDEO    = "upload_video"
+	CHAT_RECORD_AUDIO    = "record_audio"
+	CHAT_UPLOAD_AUDIO    = "upload_audio"
+	CHAT_UPLOAD_DOCUMENT = "upload_document"
+	CHAT_FIND_LOCATION   = "find_location"
+)
+
+type BotConfig struct {
+	token string
+	debug bool
+}
+
+type BotApi struct {
+	config BotConfig
+}
+
+type ApiResponse struct {
+	Ok     bool            `json:"ok"`
+	Result json.RawMessage `json:"result"`
+}
+
+type Update struct {
+	UpdateId int     `json:"update_id"`
+	Message  Message `json:"message"`
+}
+
+type User struct {
+	Id        int    `json:"id"`
+	FirstName string `json:"first_name"`
+	LastName  string `json:"last_name"`
+	UserName  string `json:"username"`
+}
+
+type GroupChat struct {
+	Id    int    `json:"id"`
+	Title string `json:"title"`
+}
+
+type UserOrGroupChat struct {
+	Id        int    `json:"id"`
+	FirstName string `json:"first_name"`
+	LastName  string `json:"last_name"`
+	UserName  string `json:"username"`
+	Title     string `json:"title"`
+}
+
+type Message struct {
+	MessageId           int             `json:"message_id"`
+	From                User            `json:"from"`
+	Date                int             `json:"date"`
+	Chat                UserOrGroupChat `json:"chat"`
+	ForwardFrom         User            `json:"forward_from"`
+	ForwardDate         int             `json:"forward_date"`
+	ReplyToMessage      *Message        `json:"reply_to_message"`
+	Text                string          `json:"text"`
+	Audio               Audio           `json:"audio"`
+	Document            Document        `json:"document"`
+	Photo               []PhotoSize     `json:"photo"`
+	Sticker             Sticker         `json:"sticker"`
+	Video               Video           `json:"video"`
+	Contact             Contact         `json:"contact"`
+	Location            Location        `json:"location"`
+	NewChatParticipant  User            `json:"new_chat_participant"`
+	LeftChatParticipant User            `json:"left_chat_participant"`
+	NewChatTitle        string          `json:"new_chat_title"`
+	NewChatPhoto        string          `json:"new_chat_photo"`
+	DeleteChatPhoto     bool            `json:"delete_chat_photo"`
+	GroupChatCreated    bool            `json:"group_chat_created"`
+}
+
+type PhotoSize struct {
+	FileId   string `json:"file_id"`
+	Width    int    `json:"width"`
+	Height   int    `json:"height"`
+	FileSize int    `json:"file_size"`
+}
+
+type Audio struct {
+	FileId   string `json:"file_id"`
+	Duration int    `json:"duration"`
+	MimeType string `json:"mime_type"`
+	FileSize int    `json:"file_size"`
+}
+
+type Document struct {
+	FileId   string    `json:"file_id"`
+	Thumb    PhotoSize `json:"thumb"`
+	FileName string    `json:"file_name"`
+	MimeType string    `json:"mime_type"`
+	FileSize int       `json:"file_size"`
+}
+
+type Sticker struct {
+	FileId   string    `json:"file_id"`
+	Width    int       `json:"width"`
+	Height   int       `json:"height"`
+	Thumb    PhotoSize `json:"thumb"`
+	FileSize int       `json:"file_size"`
+}
+
+type Video struct {
+	FileId   string    `json:"file_id"`
+	Width    int       `json:"width"`
+	Height   int       `json:"height"`
+	Duration int       `json:"duration"`
+	Thumb    PhotoSize `json:"thumb"`
+	MimeType string    `json:"mime_type"`
+	FileSize int       `json:"file_size"`
+	Caption  string    `json:"caption"`
+}
+
+type Contact struct {
+	PhoneNumber string `json:"phone_number"`
+	FirstName   string `json:"first_name"`
+	LastName    string `json:"last_name"`
+	UserId      string `json:"user_id"`
+}
+
+type Location struct {
+	Longitude float32 `json:"longitude"`
+	Latitude  float32 `json:"latitude"`
+}
+
+type UserProfilePhotos struct {
+	TotalCount int         `json:"total_count"`
+	Photos     []PhotoSize `json:"photos"`
+}
+
+type ReplyKeyboardMarkup struct {
+	Keyboard        map[string]map[string]string `json:"keyboard"`
+	ResizeKeyboard  bool                         `json:"resize_keyboard"`
+	OneTimeKeyboard bool                         `json:"one_time_keyboard"`
+	Selective       bool                         `json:"selective"`
+}
+
+type ReplyKeyboardHide struct {
+	HideKeyboard bool `json:"hide_keyboard"`
+	Selective    bool `json:"selective"`
+}
+
+type ForceReply struct {
+	ForceReply bool `json:"force_reply"`
+	Selective  bool `json:"force_reply"`
+}
+
+type UpdateConfig struct {
+	Offset  int
+	Limit   int
+	Timeout int
+}
+
+type MessageConfig struct {
+	ChatId                int
+	Text                  string
+	DisableWebPagePreview bool
+	ReplyToMessageId      int
+}
+
+type ForwardConfig struct {
+	ChatId     int
+	FromChatId int
+	MessageId  int
+}
+
+type LocationConfig struct {
+	ChatId           int
+	Latitude         float64
+	Longitude        float64
+	ReplyToMessageId int
+	ReplyMarkup      interface{}
+}
+
+type ChatActionConfig struct {
+	ChatId int
+	Action string
+}
+
+type UserProfilePhotosConfig struct {
+	UserId int
+	Offset int
+	Limit  int
+}
+
+func NewBotApi(config BotConfig) *BotApi {
+	return &BotApi{
+		config: config,
+	}
+}
+
+func (bot *BotApi) makeRequest(endpoint string, params url.Values) (ApiResponse, error) {
+	resp, err := http.PostForm("https://api.telegram.org/bot"+bot.config.token+"/"+endpoint, params)
+	defer resp.Body.Close()
+	if err != nil {
+		return ApiResponse{}, err
+	}
+
+	bytes, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return ApiResponse{}, nil
+	}
+
+	if bot.config.debug {
+		log.Println(string(bytes[:]))
+	}
+
+	var apiResp ApiResponse
+	json.Unmarshal(bytes, &apiResp)
+
+	return apiResp, nil
+}
+
+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.config.debug {
+		log.Printf("getMe: %+v\n", user)
+	}
+
+	return user, nil
+}
+
+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))
+	}
+
+	resp, err := bot.makeRequest("sendMessage", v)
+	if err != nil {
+		return Message{}, err
+	}
+
+	var message Message
+	json.Unmarshal(resp.Result, &message)
+
+	if bot.config.debug {
+		log.Printf("sendMessage req : %+v\n", v)
+		log.Printf("sendMessage resp: %+v\n", message)
+	}
+
+	return message, nil
+}
+
+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.config.debug {
+		log.Printf("forwardMessage req : %+v\n", v)
+		log.Printf("forwardMessage resp: %+v\n", message)
+	}
+
+	return message, nil
+}
+
+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.config.debug {
+		log.Printf("sendLocation req : %+v\n", v)
+		log.Printf("sendLocation resp: %+v\n", message)
+	}
+
+	return message, nil
+}
+
+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
+}
+
+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.config.debug {
+		log.Printf("getUserProfilePhotos req : %+v\n", v)
+		log.Printf("getUserProfilePhotos resp: %+v\n", profilePhotos)
+	}
+
+	return profilePhotos, nil
+}
+
+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.config.debug {
+		log.Printf("getUpdates: %+v\n", updates)
+	}
+
+	return updates, nil
+}
+
+func (bot *BotApi) setWebhook(v url.Values) error {
+	_, err := bot.makeRequest("setWebhook", v)
+
+	return err
+}
+
+func NewMessage(chatId int, text string) MessageConfig {
+	return MessageConfig{
+		ChatId: chatId,
+		Text:   text,
+		DisableWebPagePreview: false,
+		ReplyToMessageId:      0,
+	}
+}
+
+func NewForward(chatId int, fromChatId int, messageId int) ForwardConfig {
+	return ForwardConfig{
+		ChatId:     chatId,
+		FromChatId: fromChatId,
+		MessageId:  messageId,
+	}
+}
+
+func NewLocation(chatId int, latitude float64, longitude float64) LocationConfig {
+	return LocationConfig{
+		ChatId:           chatId,
+		Latitude:         latitude,
+		Longitude:        longitude,
+		ReplyToMessageId: 0,
+		ReplyMarkup:      nil,
+	}
+}
+
+func NewChatAction(chatId int, action string) ChatActionConfig {
+	return ChatActionConfig{
+		ChatId: chatId,
+		Action: action,
+	}
+}
+
+func NewUserProfilePhotos(userId int) UserProfilePhotosConfig {
+	return UserProfilePhotosConfig{
+		UserId: userId,
+		Offset: 0,
+		Limit:  0,
+	}
+}
+
+func NewUpdate(offset int) UpdateConfig {
+	return UpdateConfig{
+		Offset:  offset,
+		Limit:   0,
+		Timeout: 0,
+	}
+}