From 1e6407adfead395e9be1c0e5ce73aa9930473e3a Mon Sep 17 00:00:00 2001
From: Neur0toxine <pashok9825@gmail.com>
Date: Thu, 9 May 2024 17:42:42 +0300
Subject: [PATCH] first webhook processor, fix errors

---
 internal/app/app.go                           | 17 ++++--
 internal/app/db_wrapper.go                    | 18 +++++++
 internal/db/model/chat.go                     | 12 +++--
 internal/db/model/integration.go              |  8 ++-
 internal/db/model/user.go                     |  2 +-
 internal/db/repository/chat.go                | 12 ++---
 internal/db/repository/user.go                | 24 ++++++---
 .../handler/chat_member_updated_handler.go    |  5 +-
 internal/handler/fsm/fsmcontract/context.go   |  3 +-
 internal/handler/fsm/fsmcontract/db.go        | 15 ++++++
 internal/handler/fsm/machine/dto/payload.go   | 24 ++++-----
 internal/handler/fsm/machine/polls.go         | 10 ++--
 internal/handler/fsm/machine/store.go         |  8 +--
 internal/handler/handler.go                   | 12 -----
 internal/handler/iface/base.go                | 28 ++++++++++
 internal/handler/new_message_handler.go       | 27 ++++++++--
 internal/handler/util/command.go              | 10 ++++
 internal/handler/wizard/register.go           | 54 +++++++++++++++++++
 internal/locale/app.en.yaml                   |  1 +
 internal/locale/app.ru.yaml                   |  1 +
 20 files changed, 226 insertions(+), 65 deletions(-)
 create mode 100644 internal/app/db_wrapper.go
 create mode 100644 internal/handler/fsm/fsmcontract/db.go
 create mode 100644 internal/handler/iface/base.go
 create mode 100644 internal/handler/util/command.go
 create mode 100644 internal/handler/wizard/register.go

diff --git a/internal/app/app.go b/internal/app/app.go
index 2db5c4c..874992e 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -1,10 +1,10 @@
 package app
 
 import (
-	"fmt"
 	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/config"
 	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/db"
 	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/fsmcontract"
 	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/locale"
 	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/logger"
 	"github.com/mymmrac/telego"
@@ -55,8 +55,8 @@ func (a *App) Conf() *config.Config {
 	return a.Config
 }
 
-func (a *App) DB() *db.Repositories {
-	return a.Repositories
+func (a *App) DB() fsmcontract.Repositories {
+	return &DBWrapper{a.Repositories}
 }
 
 func (a *App) Localizer(lang string) locale.Localizer {
@@ -122,7 +122,16 @@ func (a *App) longPoll() error {
 	}
 	defer a.Telegram.StopLongPolling()
 	for update := range updates {
-		fmt.Printf("Update: %+v\n", update)
+		go func() {
+			defer func() {
+				if r := recover(); r != nil {
+					a.Logger.Errorf("recovered from panic inside the handler: %v", r)
+				}
+			}()
+			if err := a.handler(update).Handle(update); err != nil {
+				a.Logger.Errorf("error while handling the update: %s", err)
+			}
+		}()
 	}
 	return nil
 }
diff --git a/internal/app/db_wrapper.go b/internal/app/db_wrapper.go
new file mode 100644
index 0000000..afaf9ba
--- /dev/null
+++ b/internal/app/db_wrapper.go
@@ -0,0 +1,18 @@
+package app
+
+import (
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/db"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/fsmcontract"
+)
+
+type DBWrapper struct {
+	r *db.Repositories
+}
+
+func (w *DBWrapper) ForUser() fsmcontract.UserRepository {
+	return w.r.User
+}
+
+func (w *DBWrapper) ForChat() fsmcontract.ChatRepository {
+	return w.r.Chat
+}
diff --git a/internal/db/model/chat.go b/internal/db/model/chat.go
index 4332efe..81e506d 100644
--- a/internal/db/model/chat.go
+++ b/internal/db/model/chat.go
@@ -8,8 +8,8 @@ import (
 
 type Chat struct {
 	ID           uint64        `gorm:"primaryKey; autoIncrement" json:"id"`
-	TelegramID   uint64        `gorm:"column:telegram_id; not null" json:"telegramId"`
-	UserID       uint64        `gorm:"column:user_id; not null"`
+	TelegramID   int64         `gorm:"column:telegram_id; not null" json:"telegramId"`
+	UserID       int64         `gorm:"column:user_id; not null"`
 	Members      ChatMembers   `gorm:"column:members; not null" json:"members"`
 	Integrations []Integration `gorm:"foreignKey:ChatID" json:"integrations"`
 }
@@ -18,7 +18,7 @@ func (Chat) TableName() string {
 	return "chat"
 }
 
-type ChatMembers []uint64
+type ChatMembers []int64
 
 func (cm *ChatMembers) Scan(value interface{}) error {
 	switch v := value.(type) {
@@ -41,8 +41,12 @@ func (cm *ChatMembers) Scan(value interface{}) error {
 
 func (cm ChatMembers) Value() (driver.Value, error) {
 	if cm == nil {
-		return nil, nil
+		return "[]", nil
 	}
 	jsonData, err := json.Marshal(cm)
 	return string(jsonData), err
 }
+
+func (ChatMembers) GormDataType() string {
+	return "json"
+}
diff --git a/internal/db/model/integration.go b/internal/db/model/integration.go
index af8fd14..2609805 100644
--- a/internal/db/model/integration.go
+++ b/internal/db/model/integration.go
@@ -9,7 +9,7 @@ import (
 type Integration struct {
 	ID     uint64            `gorm:"primaryKey; autoIncrement;"`
 	Type   IntegrationType   `gorm:"column:type; not null"`
-	ChatID uint64            `gorm:"column:chat_id; not null"`
+	ChatID int64             `gorm:"column:chat_id; not null"`
 	Params datatypes.JSONMap `gorm:"column:params; not null"`
 }
 
@@ -60,5 +60,9 @@ func (it IntegrationType) Value() (driver.Value, error) {
 	if ok {
 		return val, nil
 	}
-	return "", errors.New("invalid IntegrationType")
+	return InvalidIntegration, nil
+}
+
+func (IntegrationType) GormDataType() string {
+	return "varchar(24)"
 }
diff --git a/internal/db/model/user.go b/internal/db/model/user.go
index 654a833..7558063 100644
--- a/internal/db/model/user.go
+++ b/internal/db/model/user.go
@@ -2,7 +2,7 @@ package model
 
 type User struct {
 	ID         uint64 `gorm:"primary_key;auto_increment" json:"id"`
-	TelegramID uint64 `gorm:"not null" json:"telegram_id"`
+	TelegramID int64  `gorm:"not null" json:"telegram_id"`
 	Chats      []Chat `gorm:"foreignKey:UserID" json:"chats"`
 }
 
diff --git a/internal/db/repository/chat.go b/internal/db/repository/chat.go
index f45fd9d..fcf752e 100644
--- a/internal/db/repository/chat.go
+++ b/internal/db/repository/chat.go
@@ -15,17 +15,17 @@ func NewChat(db *gorm.DB) *Chat {
 }
 
 func (c *Chat) ByID(id uint64) (*model.Chat, error) {
-	var chat *model.Chat
-	if err := c.db.First(&chat, id).Error; err != nil {
+	var chat model.Chat
+	if err := c.db.Model(&chat).First(&chat, id).Error; err != nil {
 		return nil, util.HandleRecordNotFound(err)
 	}
-	return chat, nil
+	return &chat, nil
 }
 
 func (c *Chat) ByIDWithIntegrations(id uint64) (*model.Chat, error) {
-	var chat *model.Chat
-	if err := c.db.Preload("Integrations").First(&chat, id).Error; err != nil {
+	var chat model.Chat
+	if err := c.db.Model(&chat).Preload("Integrations").First(&chat, id).Error; err != nil {
 		return nil, util.HandleRecordNotFound(err)
 	}
-	return chat, nil
+	return &chat, nil
 }
diff --git a/internal/db/repository/user.go b/internal/db/repository/user.go
index 618eea5..d7fe965 100644
--- a/internal/db/repository/user.go
+++ b/internal/db/repository/user.go
@@ -15,17 +15,29 @@ func NewUser(db *gorm.DB) *User {
 }
 
 func (u *User) ByID(id uint64) (*model.User, error) {
-	var user *model.User
-	if err := u.db.First(&user, id).Error; err != nil {
+	var user model.User
+	if err := u.db.Model(&user).First(&user, id).Error; err != nil {
 		return nil, util.HandleRecordNotFound(err)
 	}
-	return user, nil
+	return &user, nil
+}
+
+func (u *User) ByTelegramID(id int64) (*model.User, error) {
+	var user model.User
+	if err := u.db.Model(model.User{TelegramID: id}).First(&user).Error; err != nil {
+		return nil, util.HandleRecordNotFound(err)
+	}
+	return &user, nil
 }
 
 func (u *User) ByIDWithChats(id uint64) (*model.User, error) {
-	var user *model.User
-	if err := u.db.Preload("Chats").First(&user, id).Error; err != nil {
+	var user model.User
+	if err := u.db.Model(&user).Preload("Chats").First(&user, id).Error; err != nil {
 		return nil, util.HandleRecordNotFound(err)
 	}
-	return user, nil
+	return &user, nil
+}
+
+func (u *User) Save(user *model.User) error {
+	return u.db.Model(&model.User{}).Save(user).Error
 }
diff --git a/internal/handler/chat_member_updated_handler.go b/internal/handler/chat_member_updated_handler.go
index f77a528..84362c4 100644
--- a/internal/handler/chat_member_updated_handler.go
+++ b/internal/handler/chat_member_updated_handler.go
@@ -1,14 +1,15 @@
 package handler
 
 import (
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/fsmcontract"
 	"github.com/mymmrac/telego"
 )
 
 type ChatMemberUpdatedHandler struct {
-	app App
+	app fsmcontract.App
 }
 
-func NewChatMemberUpdatedHandler(app App) *ChatMemberUpdatedHandler {
+func NewChatMemberUpdatedHandler(app fsmcontract.App) *ChatMemberUpdatedHandler {
 	return &ChatMemberUpdatedHandler{app: app}
 }
 
diff --git a/internal/handler/fsm/fsmcontract/context.go b/internal/handler/fsm/fsmcontract/context.go
index 5695d9a..3918b90 100644
--- a/internal/handler/fsm/fsmcontract/context.go
+++ b/internal/handler/fsm/fsmcontract/context.go
@@ -2,7 +2,6 @@ package fsmcontract
 
 import (
 	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/config"
-	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/db"
 	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/locale"
 	"github.com/mymmrac/telego"
 	"go.uber.org/zap"
@@ -17,6 +16,6 @@ type App interface {
 	Log() *zap.SugaredLogger
 	TG() *telego.Bot
 	Conf() *config.Config
-	DB() *db.Repositories
+	DB() Repositories
 	Localizer(string) locale.Localizer
 }
diff --git a/internal/handler/fsm/fsmcontract/db.go b/internal/handler/fsm/fsmcontract/db.go
new file mode 100644
index 0000000..9b23a7c
--- /dev/null
+++ b/internal/handler/fsm/fsmcontract/db.go
@@ -0,0 +1,15 @@
+package fsmcontract
+
+import "gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/db/model"
+
+type Repositories interface {
+	ForUser() UserRepository
+	ForChat() ChatRepository
+}
+
+type UserRepository interface {
+	ByTelegramID(id int64) (*model.User, error)
+	Save(user *model.User) error
+}
+
+type ChatRepository interface{}
diff --git a/internal/handler/fsm/machine/dto/payload.go b/internal/handler/fsm/machine/dto/payload.go
index 240855c..1c52182 100644
--- a/internal/handler/fsm/machine/dto/payload.go
+++ b/internal/handler/fsm/machine/dto/payload.go
@@ -1,7 +1,7 @@
 package dto
 
 import (
-    "encoding/json"
+	"encoding/json"
 )
 
 type PayloadAction uint8
@@ -24,14 +24,14 @@ const (
 )
 
 type Payload struct {
-	User   uint64          `json:"u,omitempty"`
-	Chat   uint64          `json:"c,omitempty"`
+	User   int64           `json:"u,omitempty"`
+	Chat   int64           `json:"c,omitempty"`
 	Action PayloadAction   `json:"a"`
 	Data   json.RawMessage `json:"d,omitempty"`
 }
 
 type Member struct {
-	ID   uint64
+	ID   int64
 	Name string
 }
 
@@ -44,7 +44,7 @@ type Answer struct {
 	Result bool         `json:"r"`
 }
 
-func NewNextPageMembersPayload(userID, chatID uint64) *Payload {
+func NewNextPageMembersPayload(userID, chatID int64) *Payload {
 	return &Payload{
 		Action: PayloadActionNext,
 		User:   userID,
@@ -52,7 +52,7 @@ func NewNextPageMembersPayload(userID, chatID uint64) *Payload {
 	}
 }
 
-func NewPrevPageMembersPayload(userID, chatID uint64) *Payload {
+func NewPrevPageMembersPayload(userID, chatID int64) *Payload {
 	return &Payload{
 		Action: PayloadActionPrevious,
 		User:   userID,
@@ -60,7 +60,7 @@ func NewPrevPageMembersPayload(userID, chatID uint64) *Payload {
 	}
 }
 
-func NewAddMemberPayload(userID, chatID, memberID uint64, memberName string) *Payload {
+func NewAddMemberPayload(userID, chatID, memberID int64, memberName string) *Payload {
 	return &Payload{
 		Action: PayloadActionAddMember,
 		User:   userID,
@@ -69,7 +69,7 @@ func NewAddMemberPayload(userID, chatID, memberID uint64, memberName string) *Pa
 	}
 }
 
-func NewRemoveMemberPayload(userID, chatID, memberID uint64, memberName string) *Payload {
+func NewRemoveMemberPayload(userID, chatID, memberID int64, memberName string) *Payload {
 	return &Payload{
 		Action: PayloadActionRemoveMember,
 		User:   userID,
@@ -78,7 +78,7 @@ func NewRemoveMemberPayload(userID, chatID, memberID uint64, memberName string)
 	}
 }
 
-func NewVotePayload(chatID uint64, vote float32) *Payload {
+func NewVotePayload(chatID int64, vote float32) *Payload {
 	return &Payload{
 		Action: PayloadActionVote,
 		Chat:   chatID,
@@ -86,7 +86,7 @@ func NewVotePayload(chatID uint64, vote float32) *Payload {
 	}
 }
 
-func NewConfirmMembersPayload(userID uint64, chatID uint64) *Payload {
+func NewConfirmMembersPayload(userID int64, chatID int64) *Payload {
 	return &Payload{
 		Action: PayloadActionYesNo,
 		User:   userID,
@@ -95,7 +95,7 @@ func NewConfirmMembersPayload(userID uint64, chatID uint64) *Payload {
 	}
 }
 
-func NewRedmineQuestionPayload(userID uint64, chatID uint64, isYes bool) *Payload {
+func NewRedmineQuestionPayload(userID int64, chatID int64, isYes bool) *Payload {
 	return &Payload{
 		Action: PayloadActionYesNo,
 		User:   userID,
@@ -104,7 +104,7 @@ func NewRedmineQuestionPayload(userID uint64, chatID uint64, isYes bool) *Payloa
 	}
 }
 
-func NewRedmineHoursQuestionPayload(userID uint64, chatID uint64, isYes bool) *Payload {
+func NewRedmineHoursQuestionPayload(userID int64, chatID int64, isYes bool) *Payload {
 	return &Payload{
 		Action: PayloadActionYesNo,
 		User:   userID,
diff --git a/internal/handler/fsm/machine/polls.go b/internal/handler/fsm/machine/polls.go
index 8559ee8..e4184c0 100644
--- a/internal/handler/fsm/machine/polls.go
+++ b/internal/handler/fsm/machine/polls.go
@@ -1,8 +1,8 @@
 package machine
 
 import (
-    "gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/machine/dto"
-    "time"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/machine/dto"
+	"time"
 
 	"github.com/maypok86/otter"
 )
@@ -25,11 +25,11 @@ type PollState struct {
 	Result  PollResult
 }
 
-var Polls otter.Cache[uint64, PollState]
+var Polls otter.Cache[int64, PollState]
 
 func init() {
-	cache, err := otter.MustBuilder[uint64, PollState](10_000).
-		Cost(func(key uint64, value PollState) uint32 {
+	cache, err := otter.MustBuilder[int64, PollState](10_000).
+		Cost(func(key int64, value PollState) uint32 {
 			return 1
 		}).
 		WithTTL(time.Hour * 24 * 7).
diff --git a/internal/handler/fsm/machine/store.go b/internal/handler/fsm/machine/store.go
index 2de3147..a5ce660 100644
--- a/internal/handler/fsm/machine/store.go
+++ b/internal/handler/fsm/machine/store.go
@@ -6,8 +6,8 @@ import (
 )
 
 var (
-	userMachines = newStore[uint64, fsmcontract.Machine]()
-	pollMachines = newStore[uint64, fsmcontract.Machine]()
+	userMachines = newStore[int64, fsmcontract.Machine]()
+	pollMachines = newStore[int64, fsmcontract.Machine]()
 )
 
 type store[K comparable, V any] struct {
@@ -32,7 +32,7 @@ func (s *store[K, V]) Load(k K) (v V, ok bool) {
 	return
 }
 
-func ForUser(id uint64) fsmcontract.Machine {
+func ForUser(id int64) fsmcontract.Machine {
 	val, ok := userMachines.Load(id)
 	if !ok {
 		machine := newUserMachine()
@@ -42,7 +42,7 @@ func ForUser(id uint64) fsmcontract.Machine {
 	return val
 }
 
-func ForPoll(id uint64) fsmcontract.Machine {
+func ForPoll(id int64) fsmcontract.Machine {
 	val, ok := pollMachines.Load(id)
 	if !ok {
 		machine := newPollMachine()
diff --git a/internal/handler/handler.go b/internal/handler/handler.go
index 2032fa2..1430f06 100644
--- a/internal/handler/handler.go
+++ b/internal/handler/handler.go
@@ -1,11 +1,7 @@
 package handler
 
 import (
-	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/config"
-	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/db"
-	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/locale"
 	"github.com/mymmrac/telego"
-	"go.uber.org/zap"
 )
 
 type Type uint8
@@ -16,14 +12,6 @@ const (
 	ChatMemberUpdated
 )
 
-type App interface {
-	Log() *zap.SugaredLogger
-	TG() *telego.Bot
-	Conf() *config.Config
-	DB() *db.Repositories
-	Localizer(string) locale.Localizer
-}
-
 type Handler interface {
 	Handle(update telego.Update) error
 }
diff --git a/internal/handler/iface/base.go b/internal/handler/iface/base.go
new file mode 100644
index 0000000..c03d5eb
--- /dev/null
+++ b/internal/handler/iface/base.go
@@ -0,0 +1,28 @@
+package iface
+
+import (
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/fsmcontract"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/locale"
+)
+
+type Base struct {
+	App    fsmcontract.App
+	UserID int64
+	ChatID int64
+}
+
+func NewBase(app fsmcontract.App, userID int64, chatID int64) Base {
+	return Base{app, userID, chatID}
+}
+
+func (b Base) Localizer(lang string) locale.Localizer {
+	if len(lang) > 2 {
+		lang = lang[:2]
+	}
+	switch lang {
+	case "en", "ru":
+		return b.App.Localizer(lang)
+	default:
+		return b.App.Localizer("en")
+	}
+}
diff --git a/internal/handler/new_message_handler.go b/internal/handler/new_message_handler.go
index 933b8c2..922f3b2 100644
--- a/internal/handler/new_message_handler.go
+++ b/internal/handler/new_message_handler.go
@@ -1,18 +1,35 @@
 package handler
 
 import (
+	"encoding/json"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/fsmcontract"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/util"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/wizard"
 	"github.com/mymmrac/telego"
 )
 
 type MessageHandler struct {
-	app App
+	app fsmcontract.App
 }
 
-func NewMessageHandler(app App) Handler {
+func NewMessageHandler(app fsmcontract.App) Handler {
 	return &MessageHandler{app: app}
 }
 
-func (h *MessageHandler) Handle(telego.Update) error {
-	// TODO implement me
-	panic("implement me")
+func (h *MessageHandler) Handle(wh telego.Update) error {
+	if wh.Message != nil {
+		if wh.Message.From != nil &&
+			wh.Message.Chat.Type == telego.ChatTypePrivate &&
+			util.MatchCommand("start", wh.Message) {
+			return wizard.NewRegister(h.app, wh.Message.From.ID, wh.Message.Chat.ID).Handle(wh)
+		}
+
+		// TODO: Remove debug statement below.
+		h.app.Log().Debugf("New Message: %s", func(msg *telego.Message) string {
+			data, _ := json.Marshal(msg)
+			return string(data)
+		}(wh.Message))
+	}
+
+	return nil
 }
diff --git a/internal/handler/util/command.go b/internal/handler/util/command.go
new file mode 100644
index 0000000..a98c293
--- /dev/null
+++ b/internal/handler/util/command.go
@@ -0,0 +1,10 @@
+package util
+
+import (
+	"github.com/mymmrac/telego"
+	th "github.com/mymmrac/telego/telegohandler"
+)
+
+func MatchCommand(command string, msg *telego.Message) bool {
+	return th.CommandEqual(command)(telego.Update{Message: msg})
+}
diff --git a/internal/handler/wizard/register.go b/internal/handler/wizard/register.go
new file mode 100644
index 0000000..8e6692c
--- /dev/null
+++ b/internal/handler/wizard/register.go
@@ -0,0 +1,54 @@
+package wizard
+
+import (
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/db/model"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/fsm/fsmcontract"
+	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/handler/iface"
+	"github.com/mymmrac/telego"
+	tu "github.com/mymmrac/telego/telegoutil"
+)
+
+type Register struct {
+	iface.Base
+}
+
+func NewRegister(app fsmcontract.App, userID, chatID int64) *Register {
+	return &Register{iface.NewBase(app, userID, chatID)}
+}
+
+func (h *Register) Handle(wh telego.Update) error {
+	loc := h.Localizer(wh.Message.From.LanguageCode)
+	userRepo := h.App.DB().ForUser()
+	user, err := userRepo.ByTelegramID(wh.Message.From.ID)
+	if err != nil {
+		return err
+	}
+
+	if user != nil && user.ID > 0 {
+		_, err := h.App.TG().SendMessage(&telego.SendMessageParams{
+			ChatID:    tu.ID(wh.Message.Chat.ID),
+			Text:      loc.Message("welcome"),
+			ParseMode: telego.ModeMarkdown,
+		})
+		return err
+	}
+
+	err = userRepo.Save(&model.User{
+		TelegramID: wh.Message.From.ID,
+	})
+	if err != nil {
+		_, _ = h.App.TG().SendMessage(&telego.SendMessageParams{
+			ChatID:    tu.ID(wh.Message.Chat.ID),
+			Text:      loc.Message("internal_error"),
+			ParseMode: telego.ModeMarkdown,
+		})
+		return err
+	}
+
+	_, err = h.App.TG().SendMessage(&telego.SendMessageParams{
+		ChatID:    tu.ID(wh.Message.Chat.ID),
+		Text:      loc.Message("welcome"),
+		ParseMode: telego.ModeMarkdown,
+	})
+	return err
+}
diff --git a/internal/locale/app.en.yaml b/internal/locale/app.en.yaml
index dd8cd1a..5e157b9 100644
--- a/internal/locale/app.en.yaml
+++ b/internal/locale/app.en.yaml
@@ -1,4 +1,5 @@
 welcome: "👋 Hello! This bot allows you to conduct Scrum Poker directly in a Telegram chat and pass results to issues tied to a Redmine instance. To start, add the bot to the chat where you want to conduct poker. After this, you can continue with the setup."
+internal_error: "❌ Internal error, try again later."
 bot_was_added: "Great, the bot has been added to the chat \"{{.Name}}\". Choose chat members who will participate in the poker."
 previous: "◀️ Back"
 next: "Next ▶️"
diff --git a/internal/locale/app.ru.yaml b/internal/locale/app.ru.yaml
index 297d3c6..69a06a0 100644
--- a/internal/locale/app.ru.yaml
+++ b/internal/locale/app.ru.yaml
@@ -1,4 +1,5 @@
 welcome: "👋 Привет! Этот бот позволяет проводить Scrum Poker прямо в чате Telegram и передавать результаты в задачи в привязанном Redmine. Для начала добавьте бота в чат, в котором вы хотите проводить poker. После этого вы сможете продолжить настройку."
+internal_error: "❌ Внутренняя ошибка, попробуйте попытку позже."
 bot_was_added: "Отлично, бот был добавлен в чат \"{{.Name}}\". Выберите участников чата, которые будут участвовать в покере."
 previous: "◀️ Назад"
 next: "Вперед ▶️"