Add LICENSE and first command

This commit may be used as template for making any new Telegram bots.
Just check out it, change your variables and start developing new
shiny bot!

Maybe I need to create bot generator...

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Vladimir "fat0troll" Hodakov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

domains/commands/v1/exported.go

@@ -0,0 +1,25 @@
+// Fantasy World Zookeeper Bot
+// Copyright (c) 2018 Vladimir "fat0troll" Hodakov
+
+package commandsv1
+
+import (
+	"github.com/rs/zerolog"
+	"lab.wtfteam.pro/fat0troll/fw_zookeeper/context"
+	"lab.wtfteam.pro/fat0troll/fw_zookeeper/internal/router"
+)
+
+var (
+	c   *context.Context
+	log zerolog.Logger
+)
+
+// New initializes package
+func New(cc *context.Context) {
+	c = cc
+	log = c.Logger.With().Str("domain", "commands").Int("version", 1).Logger()
+
+	router.RegisterPrivateCommand("start", StartCommand)
+
+	log.Info().Msg("Domain «commands» initialized")
+}

domains/commands/v1/start.go

@@ -0,0 +1,16 @@
+// Fantasy World Zookeeper Bot
+// Copyright (c) 2018 Vladimir "fat0troll" Hodakov
+
+package commandsv1
+
+import (
+	"gitlab.com/toby3d/telegram"
+	itelegram "lab.wtfteam.pro/fat0troll/fw_zookeeper/internal/telegram"
+)
+
+// StartCommand responds to /start message
+func StartCommand(update *telegram.Update) {
+	message := "*Hello, hello, hello*"
+
+	itelegram.RespondWithMarkdown(update.Message.Chat.ID, message)
+}

internal/router/exported.go

@@ -14,32 +14,26 @@ var (
 	c   *context.Context
 	log zerolog.Logger
 
-	// Requests is a pointer to initialized Router object
+	// Router is a struct which handles router functions
-	Requests *Router
+	router struct {
+		privateCommands map[string]func(update *telegram.Update)
+		groupCommands   map[string]func(update *telegram.Update)
+		privateRegulars map[*regexp.Regexp]func(update *telegram.Update)
+		groupRegulars   map[*regexp.Regexp]func(update *telegram.Update)
+		inlineQueries   map[*regexp.Regexp]func(update *telegram.Update)
+	}
 )
 
-// Router is a struct which handles router functions
-type Router struct {
-	privateCommands map[string]func(update *telegram.Update)
-	groupCommands   map[string]func(update *telegram.Update)
-	privateRegulars map[*regexp.Regexp]func(update *telegram.Update)
-	groupRegulars   map[*regexp.Regexp]func(update *telegram.Update)
-	inlineQueries   map[*regexp.Regexp]func(update *telegram.Update)
-}
-
 // New initializes package
 func New(cc *context.Context) {
 	c = cc
 	log = c.Logger.With().Str("domain", "router").Int("version", 1).Logger()
-	r := &Router{}
 
-	r.privateCommands = make(map[string]func(update *telegram.Update))
+	router.privateCommands = make(map[string]func(update *telegram.Update))
-	r.groupCommands = make(map[string]func(update *telegram.Update))
+	router.groupCommands = make(map[string]func(update *telegram.Update))
-	r.privateRegulars = make(map[*regexp.Regexp]func(update *telegram.Update))
+	router.privateRegulars = make(map[*regexp.Regexp]func(update *telegram.Update))
-	r.groupRegulars = make(map[*regexp.Regexp]func(update *telegram.Update))
+	router.groupRegulars = make(map[*regexp.Regexp]func(update *telegram.Update))
-	r.inlineQueries = make(map[*regexp.Regexp]func(update *telegram.Update))
+	router.inlineQueries = make(map[*regexp.Regexp]func(update *telegram.Update))
 
 	log.Info().Msg("Initialized requests router")
-
-	Requests = r
 }

internal/router/router.go

@@ -19,7 +19,7 @@ var (
 	acceptingForwardsFrom = []int{}
 )
 
-func (r *Router) checkForward(update *telegram.Update) error {
+func checkForward(update *telegram.Update) error {
 	if update.Message.ForwardFrom != nil {
 		log.Debug().Msgf("Processing forward from Telegram ID = %d", update.Message.ForwardFrom.ID)
 		for i := range acceptingForwardsFrom {
@@ -32,9 +32,9 @@ func (r *Router) checkForward(update *telegram.Update) error {
 	return errors.New("Can't handle forward from Telegram user with ID =" + strconv.Itoa(update.Message.ForwardFrom.ID))
 }
 
-func (r *Router) handleInlineQuery(update *telegram.Update) {
+func handleInlineQuery(update *telegram.Update) {
 	rxpMatched := false
-	for rxp, function := range r.inlineQueries {
+	for rxp, function := range router.inlineQueries {
 		if rxp.MatchString(update.InlineQuery.Query) {
 			if rxpMatched {
 				log.Warn().Msgf("The message handled more than once: %s, %s", update.InlineQuery.Query, strings.Replace(rxp.String(), "\n", "\\n", -1))
@@ -49,7 +49,7 @@ func (r *Router) handleInlineQuery(update *telegram.Update) {
 	}
 }
 
-func (r *Router) handleRequest(update *telegram.Update, commands map[string]func(*telegram.Update), rxps map[*regexp.Regexp]func(*telegram.Update)) {
+func handleRequest(update *telegram.Update, commands map[string]func(*telegram.Update), rxps map[*regexp.Regexp]func(*telegram.Update)) {
 	switch {
 	case update.Message.IsCommand():
 		if commands[update.Message.Command()] != nil {
@@ -75,61 +75,61 @@ func (r *Router) handleRequest(update *telegram.Update, commands map[string]func
 	}
 }
 
-func (r *Router) handleGroupRequest(update *telegram.Update) {
+func handleGroupRequest(update *telegram.Update) {
-	r.handleRequest(update, r.groupCommands, r.groupRegulars)
+	handleRequest(update, router.groupCommands, router.groupRegulars)
 }
 
-func (r *Router) handlePrivateRequest(update *telegram.Update) {
+func handlePrivateRequest(update *telegram.Update) {
-	r.handleRequest(update, r.privateCommands, r.privateRegulars)
+	handleRequest(update, router.privateCommands, router.privateRegulars)
 }
 
 // RegisterPrivateCommand adds function to private commands list
-func (r *Router) RegisterPrivateCommand(command string, handleFunc func(update *telegram.Update)) {
+func RegisterPrivateCommand(command string, handleFunc func(update *telegram.Update)) {
 	log.Debug().Msgf("Registering handler for private command /%s", command)
-	r.privateCommands[command] = handleFunc
+	router.privateCommands[command] = handleFunc
 }
 
 // RegisterPrivateRegexp adds function to private regexp list
-func (r *Router) RegisterPrivateRegexp(rxp *regexp.Regexp, handleFunc func(update *telegram.Update)) {
+func RegisterPrivateRegexp(rxp *regexp.Regexp, handleFunc func(update *telegram.Update)) {
 	log.Debug().Msgf("Registering handler for regular expresson: %s", strings.Replace(rxp.String(), "\n", "\\n", -1))
-	r.privateRegulars[rxp] = handleFunc
+	router.privateRegulars[rxp] = handleFunc
 }
 
 // RegisterGroupCommand adds function to group commands list
-func (r *Router) RegisterGroupCommand(command string, handleFunc func(update *telegram.Update)) {
+func RegisterGroupCommand(command string, handleFunc func(update *telegram.Update)) {
 	log.Debug().Msgf("Registering handler for group command /%s", command)
-	r.groupCommands[command] = handleFunc
+	router.groupCommands[command] = handleFunc
 }
 
 // RegisterGroupRegexp adds function to group regexp list
-func (r *Router) RegisterGroupRegexp(rxp *regexp.Regexp, handleFunc func(update *telegram.Update)) {
+func RegisterGroupRegexp(rxp *regexp.Regexp, handleFunc func(update *telegram.Update)) {
 	log.Debug().Msgf("Registering handler for regular expresson: %s", strings.Replace(rxp.String(), "\n", "\\n", -1))
-	r.groupRegulars[rxp] = handleFunc
+	router.groupRegulars[rxp] = handleFunc
 }
 
 // RegisterInlineQueryResult adds function to list of inline queries
-func (r *Router) RegisterInlineQueryResult(rxp *regexp.Regexp, handleFunc func(update *telegram.Update)) {
+func RegisterInlineQueryResult(rxp *regexp.Regexp, handleFunc func(update *telegram.Update)) {
 	log.Debug().Msgf("Registering handler for inline regular expresson: %s", strings.Replace(rxp.String(), "\n", "\\n", -1))
-	r.inlineQueries[rxp] = handleFunc
+	router.inlineQueries[rxp] = handleFunc
 }
 
 // Respond searches for appropriative answer to the request and passes request to found function
 // If none of the functions can handle this request, it will be warned in log file
-func (r *Router) Respond(update telegram.Update) {
+func Respond(update telegram.Update) {
 	switch {
 	case update.Message != nil:
 		if update.Message.Text != "" {
 			if update.Message.ForwardFrom != nil {
-				err := r.checkForward(&update)
+				err := checkForward(&update)
 				if err != nil {
 					log.Warn().Err(err)
 					return
 				}
 			}
 			if update.Message.Chat.IsPrivate() {
-				r.handlePrivateRequest(&update)
+				handlePrivateRequest(&update)
 			} else if update.Message.Chat.IsGroup() || update.Message.Chat.IsSuperGroup() {
-				r.handleGroupRequest(&update)
+				handleGroupRequest(&update)
 			} else {
 				log.Debug().Msg("Can't handle update")
 			}
@@ -138,7 +138,7 @@ func (r *Router) Respond(update telegram.Update) {
 		}
 	case update.InlineQuery != nil:
 		if update.InlineQuery.Query != "" {
-			r.handleInlineQuery(&update)
+			handleInlineQuery(&update)
 		}
 	default:
 		log.Debug().Msg("Can't handle empty Message for now")

internal/telegram/exported.go

@@ -12,20 +12,16 @@ import (
 var (
 	c   *context.Context
 	log zerolog.Logger
-)
 
-// Telegram is a struch which handles Telegram instance handling functions
-type Telegram struct {
 	bot *telegram.Bot
-}
+)
 
 // New initializes package
 func New(cc *context.Context) {
 	c = cc
 	log = c.Logger.With().Str("domain", "telegram").Int("version", 1).Logger()
-	t := &Telegram{}
 
 	log.Info().Msg("Starting Telegram instance")
 
-	t.StartBot()
+	StartBot()
 }

internal/telegram/respond.go

@@ -0,0 +1,26 @@
+// Fantasy World Zookeeper Bot
+// Copyright (c) 2018 Vladimir "fat0troll" Hodakov
+
+package telegram
+
+import (
+	"gitlab.com/toby3d/telegram"
+)
+
+func getMessageParams(chatID int64, message string, disableWebPagePreview bool) telegram.SendMessageParameters {
+	return telegram.SendMessageParameters{
+		ChatID:                chatID,
+		Text:                  message,
+		ParseMode:             "Markdown",
+		DisableWebPagePreview: disableWebPagePreview}
+}
+
+// RespondWithMarkdown will send message to given chat with Markdown parse mode
+func RespondWithMarkdown(chatID int64, message string) {
+	messageParams := getMessageParams(chatID, message, false)
+
+	_, err := bot.SendMessage(&messageParams)
+	if err != nil {
+		log.Error().Err(err)
+	}
+}

internal/telegram/telegram.go

@@ -12,7 +12,7 @@ import (
 	"lab.wtfteam.pro/fat0troll/fw_zookeeper/internal/router"
 )
 
-func (t *Telegram) proxyDialer(addr string) (net.Conn, error) {
+func proxyDialer(addr string) (net.Conn, error) {
 	log.Debug().Msgf("Proxy used: %s", c.Config.Telegram.Proxy.Address)
 	proxyAuth := proxy.Auth{}
 	if c.Config.Telegram.Proxy.Username != "" {
@@ -30,24 +30,24 @@ func (t *Telegram) proxyDialer(addr string) (net.Conn, error) {
 }
 
 // Bot returns Telegram instance
-func (t *Telegram) Bot() *telegram.Bot {
+func Bot() *telegram.Bot {
-	return t.bot
+	return bot
 }
 
 // StartBot starts connection with Telegram
-func (t *Telegram) StartBot() {
+func StartBot() {
 	// Any errors here considered fatal, because main purpose of this app is Telegram interactions
 	var err error
 	var updates telegram.UpdatesChannel
 	if c.Config.Telegram.Proxy.Enabled {
-		t.bot = new(telegram.Bot)
+		bot = new(telegram.Bot)
 		client := new(http.Client)
-		client.Dial = t.proxyDialer
+		client.Dial = proxyDialer
-		t.bot.SetClient(client)
+		bot.SetClient(client)
-		t.bot.AccessToken = c.Config.Telegram.Token
+		bot.AccessToken = c.Config.Telegram.Token
-		t.bot.User, err = t.bot.GetMe()
+		bot.User, err = bot.GetMe()
 	} else {
-		t.bot, err = telegram.New(c.Config.Telegram.Token)
+		bot, err = telegram.New(c.Config.Telegram.Token)
 	}
 	if err != nil {
 		log.Fatal().Err(err)
@@ -59,22 +59,22 @@ func (t *Telegram) StartBot() {
 		if len(url.Host()) == 0 {
 			log.Fatal().Msg("Can't parse webhook URL: got empty host")
 		}
-		log.Info().Msg("Trying to set webhook: " + url.String() + t.bot.AccessToken)
+		log.Info().Msg("Trying to set webhook: " + url.String() + bot.AccessToken)
 
-		webhook := telegram.NewWebhook(url.String()+t.bot.AccessToken, nil)
+		webhook := telegram.NewWebhook(url.String()+bot.AccessToken, nil)
 		webhook.MaxConnections = 40
 
-		updates = t.bot.NewWebhookChannel(url, webhook, "", "", c.Config.Telegram.Webhook.Listen)
+		updates = bot.NewWebhookChannel(url, webhook, "", "", c.Config.Telegram.Webhook.Listen)
 	} else {
 		log.Warn().Msg("Using long-polling for updates (not recommended)")
 		var info *telegram.WebhookInfo
-		info, err = t.bot.GetWebhookInfo()
+		info, err = bot.GetWebhookInfo()
 		if err != nil {
 			log.Fatal().Err(err)
 		}
 		if info != nil && info.URL != "" {
 			log.Info().Msg("Deleting old webhook...")
-			_, err := t.bot.DeleteWebhook()
+			_, err := bot.DeleteWebhook()
 			if err != nil {
 				log.Fatal().Err(err)
 			}
@@ -84,14 +84,13 @@ func (t *Telegram) StartBot() {
 			Limit:   100,
 			Timeout: 60,
 		}
-		updates = t.bot.NewLongPollingChannel(&updatesParams)
+		updates = bot.NewLongPollingChannel(&updatesParams)
 	}
 
 	log.Info().Msg("Connection with Telegram established")
 
 	for update := range updates {
 		log.Debug().Msgf("%+v", update)
-		go router.Requests.Respond(update)
+		go router.Respond(update)
 	}
-
 }

main.go

@@ -5,6 +5,7 @@ package main
 
 import (
 	"lab.wtfteam.pro/fat0troll/fw_zookeeper/context"
+	"lab.wtfteam.pro/fat0troll/fw_zookeeper/domains/commands/v1"
 	"lab.wtfteam.pro/fat0troll/fw_zookeeper/internal/router"
 	"lab.wtfteam.pro/fat0troll/fw_zookeeper/internal/telegram"
 	"os"
@@ -25,6 +26,8 @@ func main() {
 	c.InitConfiguration()
 
 	router.New(c)
+	commandsv1.New(c)
+
 	telegram.New(c)
 
 	// CTRL+C handler.