Simplified behaviour definition functions.

.gitignore

@@ -1,3 +1,4 @@
 exe
 *.exe
 *.swp
+tmp

cmd/test/main.go

@@ -4,101 +4,56 @@ import (
 	"log"
 	"os"
 
-    //tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
+	"github.com/mojosa-software/got/src/tx"
-    "boteval/src/behx"
 )
 
-var rootKbd = behx.NewKeyboard(
+var navKeyboard = tx.NewKeyboard("nav").Row(
-	behx.NewButtonRow(
+	tx.NewButton().WithText("Inc/Dec").ScreenChange("inc/dec"),
-		behx.NewButton(
+).Row(
-			"Increment",
+	tx.NewButton().WithText("Upper case").ScreenChange("upper-case"),
-			behx.NewCustomAction(func(c *behx.Context){
+	tx.NewButton().WithText("Lower case").ScreenChange("lower-case"),
+)
+
+var incKeyboard = tx.NewKeyboard("inc/dec").Row(
+	tx.NewButton().WithText("+").ActionFunc(func(c *tx.Context) {
 		counter := c.V["counter"].(*int)
 		*counter++
 		c.Sendf("%d", *counter)
 	}),
-		),
+	tx.NewButton().WithText("-").ActionFunc(func(c *tx.Context) {
-		behx.NewButton(
-			"Decrement",
-			behx.NewCustomAction(func(c *behx.Context){
 		counter := c.V["counter"].(*int)
 		*counter--
 		c.Sendf("%d", *counter)
 	}),
-		),
-	),
-	behx.NewButtonRow(
-		behx.NewButton("To second screen",  behx.NewScreenChange("second")),
-	),
 )
 
-var secondKbd = behx.NewKeyboard(
+var startScreen = tx.NewScreen("start").
-	behx.NewButtonRow(
+	WithText("The bot started!").
-		behx.NewButton(
+	Keyboard("nav")
-			"❤",
-			behx.NewScreenChange("start"),
-		),
-	),
-)
 
-var inlineKbd = behx.NewKeyboard(
+var incScreen = tx.NewScreen("inc/dec").
-	behx.NewButtonRow(
+	WithText("The screen shows how user separated data works").
-		behx.NewButton(
+	IKeyboard("inc/dec").
-			"INLINE PRESS ME",
+	Keyboard("nav")
-			behx.NewCustomAction(func(c *behx.Context){
-				log.Println("INLINE pressed the button!")
-			}),
-		),
-		behx.NewButton("INLINE PRESS ME 2", behx.NewCustomAction(func(c *behx.Context){
-			log.Println("INLINE pressed another button!")
-		})),
-	),
-	behx.NewButtonRow(
-		behx.NewButton(
-			"INLINE PRESS ME 3",
-			behx.ScreenChange("second"),
-		),
-	),
-)
 
-
+var beh = tx.NewBehaviour().
-var startScreen = behx.NewScreen(
+	OnStartFunc(func(c *tx.Context) {
-	"Hello, World!",
+		// The function will be called every time
-	"inline",
+		// the bot is started.
-	"root",
-)
-
-var secondScreen = behx.NewScreen(
-	"Second screen!",
-	"",
-	"second",
-)
-
-var behaviour = behx.NewBehaviour(
-	behx.NewCustomAction(func(c *behx.Context){
-		// This way we provide counter for EACH user.
 		c.V["counter"] = new(int)
-		
-		// Do NOT forget to change to some of the screens
-		// since they are the ones who provide behaviour
-		// definition.
 		c.ChangeScreen("start")
-	}),
+	}).WithKeyboards(
-	behx.ScreenMap{
+	navKeyboard,
-		"start": startScreen,
+	incKeyboard,
-		"second": secondScreen,
+).WithScreens(
-	},
+	startScreen,
-	behx.KeyboardMap{
+	incScreen,
-		"root": rootKbd,
-		"inline": inlineKbd,
-		"second": secondKbd,
-	},
 )
 
 func main() {
 	token := os.Getenv("BOT_TOKEN")
 
-    bot, err := behx.NewBot(token, behaviour, nil)
+	bot, err := tx.NewBot(token, beh, nil)
 	if err != nil {
 		log.Panic(err)
 	}
@@ -108,4 +63,3 @@ func main() {
 	log.Printf("Authorized on account %s", bot.Self.UserName)
 	bot.Run()
 }
-

go.mod

@@ -1,4 +1,4 @@
-module boteval
+module github.com/mojosa-software/got
 
 go 1.20
 

src/behx/beh.go

@@ -1,39 +0,0 @@
-package behx
-
-// The package implements
-// behaviour for the Telegram bots.
-
-
-// The type describes behaviour for the bot.
-type Behaviour struct {
-	Start Action
-	Screens ScreenMap
-	Keyboards KeyboardMap
-}
-
-func NewBehaviour(
-	start Action,
-	screens ScreenMap,
-	keyboards KeyboardMap,
-) *Behaviour {
-	return &Behaviour{
-		start, screens, keyboards,
-	}
-}
-
-// Check whether the screen exists in the behaviour.
-func (beh *Behaviour) ScreenExists(id ScreenId) bool {
-	_, ok := beh.Screens[id]
-	return ok
-}
-
-// Returns the screen by it's ID.
-func (beh *Behaviour) GetScreen(id ScreenId) *Screen {
-	if !beh.ScreenExists(id) {
-		panic(ScreenNotExistErr)
-	}
-	
-	screen := beh.Screens[id]
-	return screen
-}
-

src/behx/errors.go

@@ -1,13 +0,0 @@
-package behx
-
-import (
-	"errors"
-)
-
-var (
-	ScreenNotExistErr = errors.New("screen does not exist")
-	SessionNotExistErr = errors.New("session does not exist")
-	KeyboardNotExistErr = errors.New("keyboard does not exist")
-)
-
-

src/tx/action.go

@@ -1,4 +1,4 @@
-package behx
+package tx
 
 // Implementing the intereface lets you
 // provide behaviour for the buttons etc.
@@ -7,29 +7,21 @@ type Action interface {
 }
 
 // Customized action for the bot.
-type CustomAction func(*Context)
+type ActionFunc func(*Context)
 
 // The type implements changing screen to the underlying ScreenId
 type ScreenChange ScreenId
 
-// Returns new ScreenChange.
-func NewScreenChange(screen string) ScreenChange {
-	return ScreenChange(screen)
-}
-
-// Returns new CustomAction.
-func NewCustomAction(fn func(*Context)) CustomAction {
-	return CustomAction(fn)
-}
-
 func (sc ScreenChange) Act(c *Context) {
+	if !c.B.ScreenExist(ScreenId(sc)) {
+		panic(ScreenNotExistErr)
+	}
 	err := c.ChangeScreen(ScreenId(sc))
 	if err != nil {
 		panic(err)
 	}
 }
 
-func (ca CustomAction) Act(c *Context) {
+func (af ActionFunc) Act(c *Context) {
-	ca(c)
+	af(c)
 }
-

src/tx/beh.go

@@ -0,0 +1,86 @@
+package tx
+
+// The package implements
+// behaviour for the Telegram bots.
+
+// The type describes behaviour for the bot.
+type Behaviour struct {
+	Start     Action
+	Screens   ScreenMap
+	Keyboards KeyboardMap
+}
+
+// Returns new empty behaviour.
+func NewBehaviour() *Behaviour {
+	return &Behaviour{
+		Screens:   make(ScreenMap),
+		Keyboards: make(KeyboardMap),
+	}
+}
+
+func (b *Behaviour) WithStart(a Action) *Behaviour {
+	b.Start = a
+	return b
+}
+
+func (b *Behaviour) OnStartFunc(
+	fn ActionFunc,
+) *Behaviour {
+	return b.WithStart(fn)
+}
+
+func (b *Behaviour) OnStartChangeScreen(
+	id ScreenId,
+) *Behaviour {
+	return b.WithStart(ScreenChange(id))
+}
+
+// The function sets keyboards.
+func (b *Behaviour) WithKeyboards(
+	kbds ...*Keyboard,
+) *Behaviour {
+	for _, kbd := range kbds {
+		if kbd.Id == "" {
+			panic("empty keyboard ID")
+		}
+		_, ok := b.Keyboards[kbd.Id]
+		if ok {
+			panic("duplicate keyboard IDs")
+		}
+		b.Keyboards[kbd.Id] = kbd
+	}
+	return b
+}
+
+// The function sets screens.
+func (b *Behaviour) WithScreens(
+	screens ...*Screen,
+) *Behaviour {
+	for _, screen := range screens {
+		if screen.Id == "" {
+			panic("empty screen ID")
+		}
+		_, ok := b.Screens[screen.Id]
+		if ok {
+			panic("duplicate keyboard IDs")
+		}
+		b.Screens[screen.Id] = screen
+	}
+	return b
+}
+
+// Check whether the screen exists in the behaviour.
+func (beh *Behaviour) ScreenExist(id ScreenId) bool {
+	_, ok := beh.Screens[id]
+	return ok
+}
+
+// Returns the screen by it's ID.
+func (beh *Behaviour) GetScreen(id ScreenId) *Screen {
+	if !beh.ScreenExist(id) {
+		panic(ScreenNotExistErr)
+	}
+
+	screen := beh.Screens[id]
+	return screen
+}

src/tx/bot.go

@@ -1,4 +1,4 @@
-package behx
+package tx
 
 import (
 	apix "github.com/go-telegram-bot-api/telegram-bot-api/v5"
@@ -28,7 +28,6 @@ func NewBot(token string, beh *Behaviour, sessions SessionMap) (*Bot, error) {
 		BotAPI:    bot,
 		Behaviour: beh,
 		sessions:  make(SessionMap),
-		
 	}, nil
 }
 
@@ -52,7 +51,6 @@ func (bot *Bot) Run() error {
 				bot.sessions.Add(sid)
 			}
 
-			
 			// The "start" command resets the bot
 			// by executing the Start Action.
 			if u.Message.IsCommand() {
@@ -83,4 +81,3 @@ func (bot *Bot) Run() error {
 
 	return nil
 }
-

src/tx/button.go

@@ -1,4 +1,4 @@
-package behx
+package tx
 
 import (
 	apix "github.com/go-telegram-bot-api/telegram-bot-api/v5"
@@ -18,11 +18,31 @@ type ButtonMap map[string] *Button
 type ButtonRow []*Button
 
 // Returns new button with specified text and action.
-func NewButton(text string, action Action) *Button {
+func NewButton() *Button {
-	return &Button{
+	return &Button{}
-		Text: text,
-		Action: action,
 }
+
+func (btn *Button) WithText(text string) *Button {
+	btn.Text = text
+	return btn
+}
+
+func (btn *Button) WithUrl(url string) *Button {
+	btn.Url = url
+	return btn
+}
+
+func (btn *Button) WithAction(a Action) *Button {
+	btn.Action = a
+	return btn
+}
+
+func (btn *Button) ActionFunc(fn ActionFunc) *Button {
+	return btn.WithAction(fn)
+}
+
+func (btn *Button) ScreenChange(sc ScreenChange) *Button {
+	return btn.WithAction(sc)
 }
 
 func NewButtonData(text string, data string, action Action) *Button {
@@ -71,4 +91,3 @@ func (btn *Button) Key() string {
 func NewButtonRow(btns ...*Button) ButtonRow {
 	return btns
 }
-

src/tx/context.go

@@ -1,8 +1,9 @@
-package behx
+package tx
 
 import (
-	apix "github.com/go-telegram-bot-api/telegram-bot-api/v5"
 	"fmt"
+
+	apix "github.com/go-telegram-bot-api/telegram-bot-api/v5"
 )
 
 // The type represents way to interact with user in
@@ -56,7 +57,7 @@ func (c *Context) ChangeScreen(screenId ScreenId) error {
 		return nil
 	}
 
-	if !c.B.ScreenExists(screenId) {
+	if !c.B.ScreenExist(screenId) {
 		return ScreenNotExistErr
 	}
 
@@ -79,4 +80,3 @@ func (c *Context) Send(text string) error {
 func (c *Context) Sendf(format string, v ...any) error {
 	return c.Send(fmt.Sprintf(format, v...))
 }
-

src/tx/errors.go

@@ -0,0 +1,11 @@
+package tx
+
+import (
+	"errors"
+)
+
+var (
+	ScreenNotExistErr   = errors.New("screen does not exist")
+	SessionNotExistErr  = errors.New("session does not exist")
+	KeyboardNotExistErr = errors.New("keyboard does not exist")
+)

src/tx/keyboard.go

@@ -1,8 +1,9 @@
-package behx
+package tx
 
 import (
 	apix "github.com/go-telegram-bot-api/telegram-bot-api/v5"
 )
+
 /*
 var otherKeyboard = tgbotapi.NewReplyKeyboard(
     tgbotapi.NewKeyboardButtonRow(
@@ -22,20 +23,27 @@ type KeyboardId string
 // The type represents reply keyboard which
 // is supposed to be showed on a Screen.
 type Keyboard struct {
+	Id   KeyboardId
 	Rows []ButtonRow
 }
 
 type KeyboardMap map[KeyboardId]*Keyboard
 
 // Return the new reply keyboard with rows as specified.
-func NewKeyboard(rows ...ButtonRow) *Keyboard {
+func NewKeyboard(id KeyboardId) *Keyboard {
 	return &Keyboard{
-		Rows: rows,
+		Id: id,
 	}
 }
 
+// Adds a new button row to the current keyboard.
+func (kbd *Keyboard) Row(btns ...*Button) *Keyboard {
+	kbd.Rows = append(kbd.Rows, btns)
+	return kbd
+}
+
 // Convert the Keyboard to the Telegram API type.
-func (kbd *Keyboard) ToTelegram() apix.ReplyKeyboardMarkup {
+func (kbd *Keyboard) toTelegram() apix.ReplyKeyboardMarkup {
 	rows := [][]apix.KeyboardButton{}
 	for _, row := range kbd.Rows {
 		buttons := []apix.KeyboardButton{}
@@ -48,7 +56,7 @@ func (kbd *Keyboard) ToTelegram() apix.ReplyKeyboardMarkup {
 	return apix.NewReplyKeyboard(rows...)
 }
 
-func (kbd *Keyboard) ToTelegramInline() apix.InlineKeyboardMarkup {
+func (kbd *Keyboard) toTelegramInline() apix.InlineKeyboardMarkup {
 	rows := [][]apix.InlineKeyboardButton{}
 	for _, row := range kbd.Rows {
 		buttons := []apix.InlineKeyboardButton{}
@@ -72,4 +80,3 @@ func (kbd *Keyboard) buttonMap() ButtonMap {
 
 	return ret
 }
-

src/tx/main.go

@@ -1,5 +1,4 @@
-package behx
+package tx
 
 // The package implements behaviourial
 // definition for the Telegram bots through the API.
-

src/tx/screen.go

@@ -1,4 +1,4 @@
-package behx
+package tx
 
 import (
 	apix "github.com/go-telegram-bot-api/telegram-bot-api/v5"
@@ -14,6 +14,8 @@ type ScreenText string
 // Screen statement of the bot.
 // Mostly what buttons to show.
 type Screen struct {
+	Id ScreenId
+
 	// Text to be sent to the user when changing to the screen.
 	Text ScreenText
 
@@ -28,14 +30,28 @@ type Screen struct {
 type ScreenMap map[ScreenId]*Screen
 
 // Returns the new screen with specified Text and Keyboard.
-func NewScreen(text ScreenText, ikbd KeyboardId, kbd KeyboardId) *Screen {
+func NewScreen(id ScreenId) *Screen {
 	return &Screen{
-		Text: text,
+		Id: id,
-		InlineKeyboardId: ikbd,
-		KeyboardId: kbd,
 	}
 }
 
+// Returns the screen with specified text printing on appearing.
+func (s *Screen) WithText(text ScreenText) *Screen {
+	s.Text = text
+	return s
+}
+
+func (s *Screen) IKeyboard(kbdId KeyboardId) *Screen {
+	s.InlineKeyboardId = kbdId
+	return s
+}
+
+func (s *Screen) Keyboard(kbdId KeyboardId) *Screen {
+	s.KeyboardId = kbdId
+	return s
+}
+
 // Rendering the screen text to string to be sent or printed.
 func (st ScreenText) String() string {
 	return string(st)
@@ -52,7 +68,7 @@ func (s *Screen) Render(c *Context) error {
 		if !ok {
 			return KeyboardNotExistErr
 		}
-		msg.ReplyMarkup = kbd.ToTelegramInline()
+		msg.ReplyMarkup = kbd.toTelegramInline()
 	}
 
 	_, err := c.B.Send(msg)
@@ -73,7 +89,7 @@ func (s *Screen) Render(c *Context) error {
 			if !ok {
 				return KeyboardNotExistErr
 			}
-			tkbd = kbd.ToTelegram()
+			tkbd = kbd.toTelegram()
 		}
 
 		msg.ReplyMarkup = tkbd
@@ -84,4 +100,3 @@ func (s *Screen) Render(c *Context) error {
 
 	return nil
 }
-

src/tx/session.go

@@ -1,4 +1,4 @@
-package behx
+package tx
 
 import (
 	apix "github.com/go-telegram-bot-api/telegram-bot-api/v5"