types_gen_ext.go

package tg

import (
	"encoding/json"
	"fmt"
	"strconv"
)

type ChatID int64

var _ PeerID = (ChatID)(0)

func (id ChatID) PeerID() string {
	return strconv.FormatInt(int64(id), 10)
}

// ChatType represents enum of possible chat types.
type ChatType int8

const (
	// ChatTypePrivate represents one-to-one chat.
	ChatTypePrivate ChatType = iota + 1
	// ChatTypeGroup represents group chats.
	ChatTypeGroup
	// ChatTypeSupergroup supergroup chats.
	ChatTypeSupergroup
	// ChatTypeChannel represents channels
	ChatTypeChannel
	// ChatTypeSender for a private chat with the inline query sender
	ChatTypeSender
)

func (chatType ChatType) String() string {
	if chatType < ChatTypePrivate || chatType > ChatTypeSender {
		return "unknown"
	}

	return [...]string{"private", "group", "supergroup", "channel", "sender"}[chatType-1]
}

func (chatType ChatType) MarshalJSON() ([]byte, error) {
	return json.Marshal(chatType.String())
}

func (chatType *ChatType) UnmarshalJSON(b []byte) error {
	var s string
	if err := json.Unmarshal(b, &s); err != nil {
		return err
	}

	switch s {
	case "private":
		*chatType = ChatTypePrivate
	case "group":
		*chatType = ChatTypeGroup
	case "supergroup":
		*chatType = ChatTypeSupergroup
	case "channel":
		*chatType = ChatTypeChannel
	case "sender":
		*chatType = ChatTypeSender
	default:
		return fmt.Errorf("unknown chat type: %s", s)
	}

	return nil
}

// ChatAction type of action to broadcast via sendChatAction.
type ChatAction int8

const (
	ChatActionTyping ChatAction = iota + 1
	ChatActionUploadPhoto
	ChatActionRecordVideo
	ChatActionUploadVideo
	ChatActionRecordVoice
	ChatActionUploadVoice
	ChatActionUploadDocument
	ChatActionChooseSticker
	ChatActionFindLocation
	ChatActionRecordVideoNote
	ChatActionUploadVideoNote
)

func (action ChatAction) String() string {
	if action < ChatActionTyping || action > ChatActionUploadVideoNote {
		return "unknown"
	}
	return [...]string{
		"typing",
		"upload_photo",
		"record_video",
		"upload_video",
		"record_voice",
		"upload_voice",
		"upload_document",
		"choose_sticker",
		"find_location",
		"record_video_note",
		"upload_video_note",
	}[action-1]
}

// UserID it's unique identifier for Telegram user or bot.
type UserID int64

var _ PeerID = (UserID)(0)

func (id UserID) PeerID() string {
	return strconv.FormatInt(int64(id), 10)
}

// Username represents a Telegram username.
type Username string

func (un Username) PeerID() string {
	return "@" + string(un)
}

// PeerID represents generic Telegram peer.
//
// Known implementations:
//   - [UserID]
//   - [ChatID]
//   - [Username]
//   - [Chat]
//   - [User]
type PeerID interface {
	PeerID() string
}

type FileID string

// FileArg it's union type for different ways of sending files.
type FileArg struct {
	// Send already uploaded file by its file_id.
	FileID FileID

	// Send remote file by URL.
	URL string

	// Upload file
	Upload InputFile

	addr string
}

// NewFileArgUpload creates a new FileArg for uploading a file by content.
func NewFileArgUpload(file InputFile) FileArg {
	return FileArg{
		Upload: file,
	}
}

// NewFileArgURL creates a new FileArg for sending a file by URL.
func NewFileArgURL(url string) FileArg {
	return FileArg{
		URL: url,
	}
}

// NewFileArgID creates a new FileArg for sending a file by file_id.
func NewFileArgID(id FileID) FileArg {
	return FileArg{
		FileID: id,
	}
}

func (arg FileArg) MarshalJSON() ([]byte, error) {
	str := arg.getString()
	if str != "" {
		return json.Marshal(str)
	}

	return nil, fmt.Errorf("FileArg is not json serializable")
}

func (arg *FileArg) getString() string {
	if arg.FileID != "" {
		return string(arg.FileID)
	} else if arg.URL != "" {
		return arg.URL
	} else if arg.addr != "" {
		return arg.addr
	}

	return ""
}

//go:generate go run github.com/mr-linch/go-tg-gen@latest -types-output types_gen.go

func (chat Chat) PeerID() string {
	return chat.ID.PeerID()
}

func (user User) PeerID() string {
	return user.ID.PeerID()
}

// InputMedia generic interface for InputMedia*.
//
// Known implementations:
//   - [InputMediaPhoto]
//   - [InputMediaVideo]
//   - [InputMediaAudio]
//   - [InputMediaDocument]
//   - [InputMediaAnimation]
type InputMedia interface {
	getMedia() (media *FileArg, thumb *InputFile)
}

type CallbackGame struct{}

// ReplyMarkup generic for keyboards.
//
// Known implementations:
//  - [ReplyKeyboardMarkup]
//  - [InlineKeyboardMarkup]
//  - [ReplyKeyboardRemove]
//  - [ForceReply]
type ReplyMarkup interface {
	isReplyMarkup()
}

var _ ReplyMarkup = (*InlineKeyboardMarkup)(nil)

// NewInlineKeyboardMarkup creates a new InlineKeyboardMarkup.
func NewInlineKeyboardMarkup(rows ...[]InlineKeyboardButton) InlineKeyboardMarkup {
	return InlineKeyboardMarkup{
		InlineKeyboard: rows,
	}
}

func (markup InlineKeyboardMarkup) Ptr() *InlineKeyboardMarkup {
	return &markup
}

// NewInlineButtonURL create inline button
// with http(s):// or tg:// URL to be opened when the button is pressed.
func NewInlineKeyboardButtonURL(text string, url string) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text: text,
		URL:  url,
	}
}

// NewInlineKeyboardButtonCallback creates a new InlineKeyboardButton with specified callback data.
// Query should have length 1-64 bytes.
func NewInlineKeyboardButtonCallback(text string, query string) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text:         text,
		CallbackData: query,
	}
}

// NewInlineKeyboardButtonWebApp creates a button that open a web app.
func NewInlineKeyboardButtonWebApp(text string, webApp WebAppInfo) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text:   text,
		WebApp: &webApp,
	}
}

// InlineKeyboardMarkup represents button that open web page with auth data.
func NewInlineKeyboardButtonLoginURL(text string, loginURL LoginURL) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text:     text,
		LoginURL: &loginURL,
	}
}

// NewInlineKeyboardButtonSwitchInlineQuery represents button that
//  will prompt the user to select one of their chats,
// open that chat and insert the bot's username and the specified inline query in the input field.
func NewInlineKeyboardButtonSwitchInlineQuery(text string, query string) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text:              text,
		SwitchInlineQuery: query,
	}
}

// NewInlineKeyboardButtonSwitchInlineQueryCurrentChat represents button that
// will insert the bot's username and the specified inline query in the current chat's input field
func NewInlineKeyboardButtonSwitchInlineQueryCurrentChat(text string, query string) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text:                         text,
		SwitchInlineQueryCurrentChat: query,
	}
}

// NewInlineKeyboardButtonCallbackGame represents the button which open a game.
func NewInlineKeyboardButtonCallbackGame(text string) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text:         text,
		CallbackGame: &CallbackGame{},
	}
}

// NewInlineKeyboardButtonPay represents a Pay button.
// NOTE: This type of button must always be the first button in the first row and can only be used in invoice messages
func NewInlineKeyboardButtonPay(text string) InlineKeyboardButton {
	return InlineKeyboardButton{
		Text: text,
		Pay:  true,
	}
}

func (markup InlineKeyboardMarkup) isReplyMarkup() {}

// NewReplyKeyboardMarkup creates a new ReplyKeyboardMarkup.
func NewReplyKeyboardMarkup(rows ...[]KeyboardButton) *ReplyKeyboardMarkup {
	return &ReplyKeyboardMarkup{
		Keyboard: rows,
	}
}

var _ ReplyMarkup = (*ReplyKeyboardMarkup)(nil)

// WithResizeKeyboard requests clients to resize the keyboard vertically for optimal fit (e.g., make the keyboard smaller if there are just two rows of buttons).
// Defaults to false, in which case the custom keyboard is always of the same height as the app's standard keyboard.
func (markup *ReplyKeyboardMarkup) WithResizeKeyboardMarkup() *ReplyKeyboardMarkup {
	markup.ResizeKeyboard = true
	return markup
}

// WithOneTimeKeyboard  requests clients to hide the keyboard as soon as it's been used.
// The keyboard will still be available, but clients will automatically display the
// usual letter-keyboard in the chat - the user can press a special button in
// the input field to see the custom keyboard again.
// Defaults to false.
func (markup *ReplyKeyboardMarkup) WithOneTimeKeyboardMarkup() *ReplyKeyboardMarkup {
	markup.OneTimeKeyboard = true
	return markup
}

// WithInputFieldPlaceholder sets the placeholder to be shown in the input field when the keyboard is active;
// 1-64 characters
func (markup *ReplyKeyboardMarkup) WithInputFieldPlaceholder(placeholder string) *ReplyKeyboardMarkup {
	markup.InputFieldPlaceholder = placeholder
	return markup
}

// Use this parameter if you want to show the keyboard to specific users only.
func (markup *ReplyKeyboardMarkup) WithSelective() *ReplyKeyboardMarkup {
	markup.Selective = true
	return markup
}

// NewKeyboardButton creates a plain reply keyboard button.
func NewKeyboardButton(text string) KeyboardButton {
	return KeyboardButton{
		Text: text,
	}
}

// NewKeyboardButtonRequestContact creates a reply keyboard button that request a contact from user.
// Available in private chats only.
func NewKeyboardButtonRequestContact(text string) KeyboardButton {
	return KeyboardButton{
		Text:           text,
		RequestContact: true,
	}
}

// NewKeyboardButtonRequestLocation creates a reply keyboard button that request a location from user.
// Available in private chats only.
func NewKeyboardButtonRequestLocation(text string) KeyboardButton {
	return KeyboardButton{
		Text:            text,
		RequestLocation: true,
	}
}

// NewKeyboardButtonRequestPoll creates a reply keyboard button that request a poll from user.
// Available in private chats only.
func NewKeyboardButtonRequestPoll(text string, poll KeyboardButtonPollType) KeyboardButton {
	return KeyboardButton{
		Text:        text,
		RequestPoll: &poll,
	}
}

// NewKeyboardButtonWebApp create a reply keyboard button that open a web app.
func NewKeyboardButtonWebApp(text string, webApp WebAppInfo) KeyboardButton {
	return KeyboardButton{
		Text:   text,
		WebApp: &webApp,
	}
}

func (markup ReplyKeyboardMarkup) isReplyMarkup() {}

var _ ReplyMarkup = (*ReplyKeyboardRemove)(nil)

// NewReplyKeyboardRemove creates a new ReplyKeyboardRemove.
func NewReplyKeyboardRemove() *ReplyKeyboardRemove {
	return &ReplyKeyboardRemove{
		RemoveKeyboard: true,
	}
}

// WithSelective set it if you want to remove the keyboard for specific users only.
func (markup *ReplyKeyboardRemove) WithSelective() *ReplyKeyboardRemove {
	markup.Selective = true
	return markup
}

func (markup ReplyKeyboardRemove) isReplyMarkup() {}

var _ ReplyMarkup = (*ForceReply)(nil)

// NewForceReply creates a new ForceReply.
func NewForceReply() *ForceReply {
	return &ForceReply{
		ForceReply: true,
	}
}

// WithSelective set it if you want to force reply for specific users only.
func (markup *ForceReply) WithSelective() *ForceReply {
	markup.Selective = true
	return markup
}

// WithInputFieldPlaceholder sets the placeholder to be shown in the input field when the reply is active;
// 1-64 characters
func (markup *ForceReply) WithInputFieldPlaceholder(placeholder string) *ForceReply {
	markup.InputFieldPlaceholder = placeholder
	return markup
}

func (markup ForceReply) isReplyMarkup() {}

// NewButtonRow it's generic helper for create keyboards in functional way.
func NewButtonRow[T Button](buttons ...T) []T {
	return buttons
}

// Button define generic button interface
type Button interface {
	InlineKeyboardButton | KeyboardButton
}

// ButtonLayout it's build for fixed width keyboards.
type ButtonLayout[T Button] struct {
	buttons  [][]T
	rowWidth int
}

// NewButtonColumn returns keyboard from a single column of Button.
func NewButtonColumn[T Button](buttons ...T) [][]T {
	result := make([][]T, 0, len(buttons))

	for _, button := range buttons {
		result = append(result, []T{button})
	}

	return result
}

// NewButtonLayout creates layout with specified width.
// Buttons will be added via Insert method.
func NewButtonLayout[T Button](rowWidth int, buttons ...T) *ButtonLayout[T] {
	layout := &ButtonLayout[T]{
		rowWidth: rowWidth,
		buttons:  make([][]T, 0),
	}

	return layout.Insert(buttons...)
}

// Keyboard returns result of building.
func (layout *ButtonLayout[T]) Keyboard() [][]T {
	return layout.buttons
}

// Insert buttons to last row if possible, or create new and insert.
func (layout *ButtonLayout[T]) Insert(buttons ...T) *ButtonLayout[T] {
	for _, button := range buttons {
		layout.insert(button)
	}

	return layout
}

func (layout *ButtonLayout[T]) insert(button T) *ButtonLayout[T] {
	if len(layout.buttons) > 0 && len(layout.buttons[len(layout.buttons)-1]) < layout.rowWidth {
		layout.buttons[len(layout.buttons)-1] = append(layout.buttons[len(layout.buttons)-1], button)
	} else {
		layout.buttons = append(layout.buttons, []T{button})
	}
	return layout
}

// Add accepts any number of buttons,
// always starts adding from a new row
// and adds a row when it reaches the set width.
func (layout *ButtonLayout[T]) Add(buttons ...T) *ButtonLayout[T] {
	row := make([]T, 0, layout.rowWidth)

	for _, button := range buttons {
		if len(row) == layout.rowWidth {
			layout.buttons = append(layout.buttons, row)
			row = make([]T, 0, layout.rowWidth)
		}

		row = append(row, button)
	}

	if len(row) > 0 {
		layout.buttons = append(layout.buttons, row)
	}

	return layout
}

// Row add new row with no respect for row width
func (layout *ButtonLayout[T]) Row(buttons ...T) *ButtonLayout[T] {
	layout.buttons = append(layout.buttons, buttons)
	return layout
}

// InlineQueryResult it's a generic interface for all inline query results.
//
// Known implementations:
//   - [InlineQueryResultCachedAudio]
//   - [InlineQueryResultCachedDocument]
//   - [InlineQueryResultCachedGIF]
//   - [InlineQueryResultCachedMPEG4GIF]
//   - [InlineQueryResultCachedPhoto]
//   - [InlineQueryResultCachedSticker]
//   - [InlineQueryResultCachedVideo]
//   - [InlineQueryResultCachedVoice]
//   - [InlineQueryResultAudio]
//   - [InlineQueryResultDocument]
//   - [InlineQueryResultGIF]
//   - [InlineQueryResultMPEG4GIF]
//   - [InlineQueryResultPhoto]
//   - [InlineQueryResultVideo]
//   - [InlineQueryResultVoice]
//   - [InlineQueryResultArticle]
//   - [InlineQueryResultContact]
//   - [InlineQueryResultGame]
//   - [InlineQueryResultLocation]
//   - [InlineQueryResultVenue]
type InlineQueryResult interface {
	isInlineQueryResult()
	json.Marshaler
}

func (InlineQueryResultCachedAudio) isInlineQueryResult() {}
func (result InlineQueryResultCachedAudio) MarshalJSON() ([]byte, error) {
	result.Type = "audio"
	type alias InlineQueryResultCachedAudio
	return json.Marshal(alias(result))
}

func (InlineQueryResultCachedDocument) isInlineQueryResult() {}
func (result InlineQueryResultCachedDocument) MarshalJSON() ([]byte, error) {
	result.Type = "document"
	type alias InlineQueryResultCachedDocument
	return json.Marshal(alias(result))
}

func (InlineQueryResultCachedGIF) isInlineQueryResult() {}
func (result InlineQueryResultCachedGIF) MarshalJSON() ([]byte, error) {
	result.Type = "gif"
	type alias InlineQueryResultCachedGIF
	return json.Marshal(alias(result))
}

func (InlineQueryResultCachedMPEG4GIF) isInlineQueryResult() {}
func (result InlineQueryResultCachedMPEG4GIF) MarshalJSON() ([]byte, error) {
	result.Type = "mpeg4_gif"
	type alias InlineQueryResultCachedMPEG4GIF
	return json.Marshal(alias(result))
}

func (InlineQueryResultCachedPhoto) isInlineQueryResult() {}
func (result InlineQueryResultCachedPhoto) MarshalJSON() ([]byte, error) {
	result.Type = "photo"
	type alias InlineQueryResultCachedPhoto
	return json.Marshal(alias(result))
}

func (InlineQueryResultCachedSticker) isInlineQueryResult() {}
func (result InlineQueryResultCachedSticker) MarshalJSON() ([]byte, error) {
	result.Type = "sticker"
	type alias InlineQueryResultCachedSticker
	return json.Marshal(alias(result))
}

func (InlineQueryResultCachedVideo) isInlineQueryResult() {}
func (result InlineQueryResultCachedVideo) MarshalJSON() ([]byte, error) {
	result.Type = "video"
	type alias InlineQueryResultCachedVideo
	return json.Marshal(alias(result))
}

func (InlineQueryResultCachedVoice) isInlineQueryResult() {}
func (result InlineQueryResultCachedVoice) MarshalJSON() ([]byte, error) {
	result.Type = "voice"
	type alias InlineQueryResultCachedVoice
	return json.Marshal(alias(result))
}

func (InlineQueryResultAudio) isInlineQueryResult() {}
func (result InlineQueryResultAudio) MarshalJSON() ([]byte, error) {
	result.Type = "audio"
	type alias InlineQueryResultAudio
	return json.Marshal(alias(result))
}

func (InlineQueryResultDocument) isInlineQueryResult() {}
func (result InlineQueryResultDocument) MarshalJSON() ([]byte, error) {
	result.Type = "document"
	type alias InlineQueryResultDocument
	return json.Marshal(alias(result))
}

func (InlineQueryResultGIF) isInlineQueryResult() {}
func (result InlineQueryResultGIF) MarshalJSON() ([]byte, error) {
	result.Type = "gif"
	type alias InlineQueryResultGIF
	return json.Marshal(alias(result))
}

func (InlineQueryResultMPEG4GIF) isInlineQueryResult() {}
func (result InlineQueryResultMPEG4GIF) MarshalJSON() ([]byte, error) {
	result.Type = "mpeg4_gif"
	type alias InlineQueryResultMPEG4GIF
	return json.Marshal(alias(result))
}

func (InlineQueryResultPhoto) isInlineQueryResult() {}
func (result InlineQueryResultPhoto) MarshalJSON() ([]byte, error) {
	result.Type = "photo"
	type alias InlineQueryResultPhoto
	return json.Marshal(alias(result))
}

func (InlineQueryResultVideo) isInlineQueryResult() {}
func (result InlineQueryResultVideo) MarshalJSON() ([]byte, error) {
	result.Type = "video"
	type alias InlineQueryResultVideo
	return json.Marshal(alias(result))
}

func (InlineQueryResultVoice) isInlineQueryResult() {}
func (result InlineQueryResultVoice) MarshalJSON() ([]byte, error) {
	result.Type = "voice"
	type alias InlineQueryResultVoice
	return json.Marshal(alias(result))
}

func (InlineQueryResultArticle) isInlineQueryResult() {}
func (result InlineQueryResultArticle) MarshalJSON() ([]byte, error) {
	result.Type = "article"
	type alias InlineQueryResultArticle
	return json.Marshal(alias(result))
}

func (InlineQueryResultContact) isInlineQueryResult() {}
func (result InlineQueryResultContact) MarshalJSON() ([]byte, error) {
	result.Type = "contact"
	type alias InlineQueryResultContact
	return json.Marshal(alias(result))
}

func (InlineQueryResultGame) isInlineQueryResult() {}
func (result InlineQueryResultGame) MarshalJSON() ([]byte, error) {
	result.Type = "game"
	type alias InlineQueryResultGame
	return json.Marshal(alias(result))
}

func (InlineQueryResultLocation) isInlineQueryResult() {}
func (result InlineQueryResultLocation) MarshalJSON() ([]byte, error) {
	result.Type = "location"
	type alias InlineQueryResultLocation
	return json.Marshal(alias(result))
}

func (InlineQueryResultVenue) isInlineQueryResult() {}
func (result InlineQueryResultVenue) MarshalJSON() ([]byte, error) {
	result.Type = "venue"
	type alias InlineQueryResultVenue
	return json.Marshal(alias(result))
}

// InputMessageContent it's generic interface for all types of input message content.
//
// Known implementations:
//  - [InputTextMessageContent]
//  - [InputLocationMessageContent]
//  - [InputVenueMessageContent]
//  - [InputContactMessageContent]
//  - [InputInvoiceMessageContent]
type InputMessageContent interface {
	isInputMessageContent()
}

func (content InputTextMessageContent) isInputMessageContent()     {}
func (content InputLocationMessageContent) isInputMessageContent() {}
func (content InputVenueMessageContent) isInputMessageContent()    {}
func (content InputContactMessageContent) isInputMessageContent()  {}
func (content InputInvoiceMessageContent) isInputMessageContent()  {}

func (media *InputMediaPhoto) getMedia() (*FileArg, *InputFile)     { return &media.Media, nil }
func (media *InputMediaVideo) getMedia() (*FileArg, *InputFile)     { return &media.Media, media.Thumb }
func (media *InputMediaAudio) getMedia() (*FileArg, *InputFile)     { return &media.Media, media.Thumb }
func (media *InputMediaDocument) getMedia() (*FileArg, *InputFile)  { return &media.Media, media.Thumb }
func (media *InputMediaAnimation) getMedia() (*FileArg, *InputFile) { return &media.Media, media.Thumb }

func (media *InputMediaPhoto) MarshalJSON() ([]byte, error) {
	media.Type = "photo"
	type alias InputMediaPhoto
	return json.Marshal(alias(*media))
}

func (media *InputMediaVideo) MarshalJSON() ([]byte, error) {
	media.Type = "video"
	type alias InputMediaVideo
	return json.Marshal(alias(*media))
}

func (media *InputMediaAudio) MarshalJSON() ([]byte, error) {
	media.Type = "audio"
	type alias InputMediaAudio
	return json.Marshal(alias(*media))
}

func (media *InputMediaDocument) MarshalJSON() ([]byte, error) {
	media.Type = "document"
	type alias InputMediaDocument
	return json.Marshal(alias(*media))
}

func (media *InputMediaAnimation) MarshalJSON() ([]byte, error) {
	media.Type = "animation"
	type alias InputMediaAnimation
	return json.Marshal(alias(*media))
}

// BotCommandScope it's generic interface for all types of bot command scope.
//
// Known implementations:
//   - [BotCommandScopeDefault]
//   - [BotCommandScopeAllPrivateChats]
//   - [BotCommandScopeAllGroupChats]
//   - [BotCommandScopeAllChatAdministrators]
//   - [BotCommandScopeChat]
//   - [BotCommandScopeChatAdministrators]
//   - [BotCommandScopeChatMember]
type BotCommandScope interface {
	isBotCommandScope()
	json.Marshaler
}

func (BotCommandScopeDefault) isBotCommandScope() {}
func (scope BotCommandScopeDefault) MarshalJSON() ([]byte, error) {
	scope.Type = "default"
	type alias BotCommandScopeDefault
	return json.Marshal(alias(scope))
}

func (BotCommandScopeAllPrivateChats) isBotCommandScope() {}
func (scope BotCommandScopeAllPrivateChats) MarshalJSON() ([]byte, error) {
	scope.Type = "all_private_chats"
	type alias BotCommandScopeAllPrivateChats
	return json.Marshal(alias(scope))
}

func (BotCommandScopeAllGroupChats) isBotCommandScope() {}
func (scope BotCommandScopeAllGroupChats) MarshalJSON() ([]byte, error) {
	scope.Type = "all_group_chats"
	type alias BotCommandScopeAllGroupChats
	return json.Marshal(alias(scope))
}

func (BotCommandScopeAllChatAdministrators) isBotCommandScope() {}
func (scope BotCommandScopeAllChatAdministrators) MarshalJSON() ([]byte, error) {
	scope.Type = "all_chat_administrators"
	type alias BotCommandScopeAllChatAdministrators
	return json.Marshal(alias(scope))
}

func (BotCommandScopeChat) isBotCommandScope() {}
func (scope BotCommandScopeChat) MarshalJSON() ([]byte, error) {
	scope.Type = "chat"
	type alias BotCommandScopeChat
	return json.Marshal(alias(scope))
}

func (BotCommandScopeChatAdministrators) isBotCommandScope() {}
func (scope BotCommandScopeChatAdministrators) MarshalJSON() ([]byte, error) {
	scope.Type = "chat_administrators"
	type alias BotCommandScopeChatAdministrators
	return json.Marshal(alias(scope))
}

func (BotCommandScopeChatMember) isBotCommandScope() {}
func (scope BotCommandScopeChatMember) MarshalJSON() ([]byte, error) {
	scope.Type = "chat_member"
	type alias BotCommandScopeChatMember
	return json.Marshal(alias(scope))
}

// MenuButton it's generic interface for all types of menu button.
//
// Known implementations:
//   - [MenuButtonDefault]
//   - [MenuButtonCommands]
//   - [MenubuttonWebApp]
type MenuButton interface {
	isMenuButton()
	json.Marshaler
}

func (MenuButtonDefault) isMenuButton() {}
func (button MenuButtonDefault) MarshalJSON() ([]byte, error) {
	button.Type = "default"
	type alias MenuButtonDefault
	return json.Marshal(alias(button))
}

func (MenuButtonCommands) isMenuButton() {}
func (button MenuButtonCommands) MarshalJSON() ([]byte, error) {
	button.Type = "commands"
	type alias MenuButtonCommands
	return json.Marshal(alias(button))
}

func (MenuButtonWebApp) isMenuButton() {}
func (button MenuButtonWebApp) MarshalJSON() ([]byte, error) {
	button.Type = "web_app"
	type alias MenuButtonWebApp
	return json.Marshal(alias(button))
}

// MessageType it's type for describe content of Message.
type MessageType int

const (
	MessageTypeUnknown MessageType = iota
	MessageTypeText
	MessageTypeAnimation
	MessageTypeAudio
	MessageTypeDocument
	MessageTypePhoto
	MessageTypeSticker
	MessageTypeVideo
	MessageTypeVideoNote
	MessageTypeVoice
	MessageTypeContact
	MessageTypeDice
	MessageTypeGame
	MessageTypePoll
	MessageTypeVenue
	MessageTypeLocation
	MessageTypeNewChatMembers
	MessageTypeLeftChatMember
	MessageTypeNewChatTitle
	MessageTypeNewChatPhoto
	MessageTypeDeleteChatPhoto
	MessageTypeGroupChatCreated
	MessageTypeSupergroupChatCreated
	MessageTypeChannelChatCreated
	MessageTypeMessageAutoDeleteTimerChanged
	MessageTypeMigrateToChatID
	MessageTypeMigrateFromChatID
	MessageTypePinnedMessage
	MessageTypeInvoice
	MessageTypeSuccessfulPayment
	MessageTypeConnectedWebsite
	MessageTypePassportData
	MessageTypeProximityAlertTriggered
	MessageTypeVideoChatScheduled
	MessageTypeVideoChatStarted
	MessageTypeVideoChatEnded
	MessageTypeVideoChatParticipantsInvited
	MessageTypeWebAppData
)

func (msg *Message) Type() MessageType {
	switch {
	case msg.Text != "":
		return MessageTypeText
	case msg.Animation != nil:
		return MessageTypeAnimation
	case msg.Audio != nil:
		return MessageTypeAudio
	case msg.Document != nil:
		return MessageTypeDocument
	case msg.Photo != nil:
		return MessageTypePhoto
	case msg.Sticker != nil:
		return MessageTypeSticker
	case msg.Video != nil:
		return MessageTypeVideo
	case msg.VideoNote != nil:
		return MessageTypeVideoNote
	case msg.Voice != nil:
		return MessageTypeVoice
	case msg.Contact != nil:
		return MessageTypeContact
	case msg.Dice != nil:
		return MessageTypeDice
	case msg.Game != nil:
		return MessageTypeGame
	case msg.Poll != nil:
		return MessageTypePoll
	case msg.Venue != nil:
		return MessageTypeVenue
	case msg.Location != nil:
		return MessageTypeLocation
	case len(msg.NewChatMembers) > 0:
		return MessageTypeNewChatMembers
	case msg.LeftChatMember != nil:
		return MessageTypeLeftChatMember
	case msg.NewChatTitle != "":
		return MessageTypeNewChatTitle
	case len(msg.NewChatPhoto) > 0:
		return MessageTypeNewChatPhoto
	case msg.DeleteChatPhoto:
		return MessageTypeDeleteChatPhoto
	case msg.GroupChatCreated:
		return MessageTypeGroupChatCreated
	case msg.SupergroupChatCreated:
		return MessageTypeSupergroupChatCreated
	case msg.ChannelChatCreated:
		return MessageTypeChannelChatCreated
	case msg.MessageAutoDeleteTimerChanged != nil:
		return MessageTypeMessageAutoDeleteTimerChanged
	case msg.MigrateToChatID != 0:
		return MessageTypeMigrateToChatID
	case msg.MigrateFromChatID != 0:
		return MessageTypeMigrateFromChatID
	case msg.PinnedMessage != nil:
		return MessageTypePinnedMessage
	case msg.Invoice != nil:
		return MessageTypeInvoice
	case msg.SuccessfulPayment != nil:
		return MessageTypeSuccessfulPayment
	case msg.ConnectedWebsite != "":
		return MessageTypeConnectedWebsite
	case msg.PassportData != nil:
		return MessageTypePassportData
	case msg.ProximityAlertTriggered != nil:
		return MessageTypeProximityAlertTriggered
	case msg.VideoChatScheduled != nil:
		return MessageTypeVideoChatScheduled
	case msg.VideoChatStarted != nil:
		return MessageTypeVideoChatStarted
	case msg.VideoChatEnded != nil:
		return MessageTypeVideoChatEnded
	case msg.VideoChatParticipantsInvited != nil:
		return MessageTypeVideoChatParticipantsInvited
	case msg.WebAppData != nil:
		return MessageTypeWebAppData
	default:
		return MessageTypeUnknown
	}
}

// UpdateType it's type for describe content of Update.
type UpdateType int

const (
	UpdateTypeUnknown UpdateType = iota
	UpdateTypeMessage
	UpdateTypeEditedMessage
	UpdateTypeChannelPost
	UpdateTypeEditedChannelPost
	UpdateTypeInlineQuery
	UpdateTypeChosenInlineResult
	UpdateTypeCallbackQuery
	UpdateTypeShippingQuery
	UpdateTypePreCheckoutQuery
	UpdateTypePoll
	UpdateTypePollAnswer
	UpdateTypeMyChatMember
	UpdateTypeChatMember
	UpdateTypeChatJoinRequest
)

// MarshalText implements encoding.TextMarshaler.
func (typ UpdateType) MarshalText() ([]byte, error) {
	if typ != UpdateTypeUnknown {
		return []byte(typ.String()), nil
	}

	return nil, fmt.Errorf("unknown update type")
}

// UnmarshalText implements encoding.TextUnmarshaler.
func (typ *UpdateType) UnmarshalText(v []byte) error {
	switch string(v) {
	case "message":
		*typ = UpdateTypeMessage
	case "edited_message":
		*typ = UpdateTypeEditedMessage
	case "channel_post":
		*typ = UpdateTypeChannelPost
	case "edited_channel_post":
		*typ = UpdateTypeEditedChannelPost
	case "inline_query":
		*typ = UpdateTypeInlineQuery
	case "chosen_inline_result":
		*typ = UpdateTypeChosenInlineResult
	case "callback_query":
		*typ = UpdateTypeCallbackQuery
	case "shipping_query":
		*typ = UpdateTypeShippingQuery
	case "pre_checkout_query":
		*typ = UpdateTypePreCheckoutQuery
	case "poll":
		*typ = UpdateTypePoll
	case "poll_answer":
		*typ = UpdateTypePollAnswer
	case "my_chat_member":
		*typ = UpdateTypeMyChatMember
	case "chat_member":
		*typ = UpdateTypeChatMember
	case "chat_join_request":
		*typ = UpdateTypeChatJoinRequest
	default:
		return fmt.Errorf("unknown update type")
	}

	return nil
}

// String returns string representation of UpdateType.
func (typ UpdateType) String() string {
	if typ > UpdateTypeUnknown && typ <= UpdateTypeChatJoinRequest {
		return [...]string{
			"message",
			"edited_message",
			"channel_post",
			"edited_channel_post",
			"inline_query",
			"chosen_inline_result",
			"callback_query",
			"shipping_query",
			"pre_checkout_query",
			"poll",
			"poll_answer",
			"my_chat_member",
			"chat_member",
			"chat_join_request",
		}[typ-1]
	}

	return "unknown"
}

func (update *Update) Type() UpdateType {
	switch {
	case update.Message != nil:
		return UpdateTypeMessage
	case update.EditedMessage != nil:
		return UpdateTypeEditedMessage
	case update.ChannelPost != nil:
		return UpdateTypeChannelPost
	case update.EditedChannelPost != nil:
		return UpdateTypeEditedChannelPost
	case update.InlineQuery != nil:
		return UpdateTypeInlineQuery
	case update.ChosenInlineResult != nil:
		return UpdateTypeChosenInlineResult
	case update.CallbackQuery != nil:
		return UpdateTypeCallbackQuery
	case update.ShippingQuery != nil:
		return UpdateTypeShippingQuery
	case update.PreCheckoutQuery != nil:
		return UpdateTypePreCheckoutQuery
	case update.Poll != nil:
		return UpdateTypePoll
	case update.PollAnswer != nil:
		return UpdateTypePollAnswer
	case update.MyChatMember != nil:
		return UpdateTypeMyChatMember
	case update.ChatMember != nil:
		return UpdateTypeChatMember
	case update.ChatJoinRequest != nil:
		return UpdateTypeChatJoinRequest
	default:
		return UpdateTypeUnknown
	}
}

// Msg returns message from whever possible.
// It returns nil if message is not found.
func (update *Update) Msg() *Message {
	switch {
	case update == nil:
		return nil
	case update.Message != nil:
		return update.Message
	case update.EditedMessage != nil:
		return update.EditedMessage
	case update.ChannelPost != nil:
		return update.ChannelPost
	case update.EditedChannelPost != nil:
		return update.EditedChannelPost
	case update.CallbackQuery != nil && update.CallbackQuery.Message != nil:
		return update.CallbackQuery.Message
	default:
		return nil
	}
}

// Chat returns chat from whever possible.
func (update *Update) Chat() *Chat {
	if update == nil {
		return nil
	}

	if msg := update.Msg(); msg != nil {
		return &msg.Chat
	}

	switch {
	case update.ChatMember != nil:
		return &update.ChatMember.Chat
	case update.MyChatMember != nil:
		return &update.MyChatMember.Chat
	case update.ChatJoinRequest != nil:
		return &update.ChatJoinRequest.Chat
	}

	return nil
}

// MessageEntityType it's type for describe content of MessageEntity.
type MessageEntityType int

const (
	MessageEntityTypeUnknown MessageEntityType = iota

	// @username
	MessageEntityTypeMention

	// #hashtag
	MessageEntityTypeHashtag

	// $USD
	MessageEntityTypeCashtag

	// /start@jobs_bot
	MessageEntityTypeBotCommand

	// https://telegram.org
	MessageEntityTypeURL

	// do-not-reply@telegram.org
	MessageEntityTypeEmail

	// +1-212-555-0123
	MessageEntityTypePhoneNumber

	// <strong>bold</strong>
	MessageEntityTypeBold

	// <i>italic</i>
	MessageEntityTypeItalic

	// <u>underline</u>
	MessageEntityTypeUnderline

	// <strike>strike</strike>
	MessageEntityTypeStrikethrough

	// <tg-spoiler>spoiler</tg-spoiler>
	MessageEntityTypeSpoiler

	// <code>code</code>
	MessageEntityTypeCode

	// <pre>pre</pre>
	MessageEntityTypePre

	// <a href="https://telegram.org">link</a>
	MessageEntityTypeTextLink

	// for users without usernames
	MessageEntityTypeTextMention
)

// String returns string representation of MessageEntityType.
func (met MessageEntityType) String() string {
	if met > MessageEntityTypeUnknown && met <= MessageEntityTypeTextMention {
		return [...]string{
			"mention",
			"hashtag",
			"cashtag",
			"bot_command",
			"url",
			"email",
			"phone_number",
			"bold",
			"italic",
			"underline",
			"strikethrough",
			"spoiler",
			"code",
			"pre",
			"text_link",
			"text_mention",
		}[met-1]
	}

	return "unknown"
}

// MarshalText implements encoding.TextMarshaler.
func (met MessageEntityType) MarshalText() ([]byte, error) {
	if met != MessageEntityTypeUnknown {
		return []byte(met.String()), nil
	}

	return nil, fmt.Errorf("unknown message entity type")
}

// UnmarshalText implements encoding.TextUnmarshaler.
func (met *MessageEntityType) UnmarshalText(v []byte) error {
	switch string(v) {
	case "mention":
		*met = MessageEntityTypeMention
	case "hashtag":
		*met = MessageEntityTypeHashtag
	case "cashtag":
		*met = MessageEntityTypeCashtag
	case "bot_command":
		*met = MessageEntityTypeBotCommand
	case "url":
		*met = MessageEntityTypeURL
	case "email":
		*met = MessageEntityTypeEmail
	case "phone_number":
		*met = MessageEntityTypePhoneNumber
	case "bold":
		*met = MessageEntityTypeBold
	case "italic":
		*met = MessageEntityTypeItalic
	case "underline":
		*met = MessageEntityTypeUnderline
	case "strikethrough":
		*met = MessageEntityTypeStrikethrough
	case "spoiler":
		*met = MessageEntityTypeSpoiler
	case "code":
		*met = MessageEntityTypeCode
	case "pre":
		*met = MessageEntityTypePre
	case "text_link":
		*met = MessageEntityTypeTextLink
	case "text_mention":
		*met = MessageEntityTypeTextMention
	default:
		return fmt.Errorf("unknown message entity type")
	}

	return nil
}

// Extract entitie value from plain text.
func (me MessageEntity) Extract(text string) string {
	return string([]rune(text)[me.Offset : me.Offset+me.Length])
}