refactor(tgbot): extract the shared numeric keypad builder

Six callback flows — limit_traffic, reset_exp, ip_limit and their
add_client_* counterparts — each carried the same 28-line inline keyboard:
cancel, confirm, the 1-9 grid, clear, 0 and backspace. Only the callback
prefix, the threaded email argument, the cancel target and the confirm
label key ever differed, and the labels had already drifted apart between
otherwise identical flows.

numericKeypad now builds that grid from a numericKeypadSpec, cutting 168
lines to 6. The callback data is unchanged: every one of the 84 strings
and all 6 label keys were diffed against the pre-refactor router and are
byte-identical, which matters because encodeQuery hashes any query over
64 chars and buttons already sitting in a user's chat carry these
strings.

internal/web/service/tgbot/numeric_input.go

@@ -1,5 +1,12 @@
 package tgbot
 
+import (
+	"strconv"
+
+	"github.com/mymmrac/telego"
+	tu "github.com/mymmrac/telego/telegoutil"
+)
+
 // updateNumericInput applies one number-pad key: -2 clears, -1 backspaces, and 0..9 append.
 // Callers retain their own validation and keyboard labels.
 func updateNumericInput(value, key int) int {
@@ -15,3 +22,37 @@ func updateNumericInput(value, key int) int {
 		return value*10 + key
 	}
 }
+
+// numericKeypadSpec describes one number-pad flow. dataBase is the callback
+// prefix without its "_in"/"_c" suffix, and dataArgs carries any leading
+// argument (an email plus its separating space) the flow threads through.
+type numericKeypadSpec struct {
+	dataBase        string
+	dataArgs        string
+	cancelData      string
+	confirmLabelKey string
+}
+
+// numericKeypad builds the shared digit pad: cancel, confirm, 1-9, clear, 0 and
+// backspace. Every numeric callback flow renders the same grid, so the layout
+// and the callback wording live here rather than once per flow.
+func (t *Tgbot) numericKeypad(spec numericKeypadSpec, inputNumber int) *telego.InlineKeyboardMarkup {
+	value := strconv.Itoa(inputNumber)
+	key := func(label, k string) telego.InlineKeyboardButton {
+		return tu.InlineKeyboardButton(label).
+			WithCallbackData(t.encodeQuery(spec.dataBase + "_in " + spec.dataArgs + value + " " + k))
+	}
+	return tu.InlineKeyboard(
+		tu.InlineKeyboardRow(
+			tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.cancel")).WithCallbackData(t.encodeQuery(spec.cancelData)),
+		),
+		tu.InlineKeyboardRow(
+			tu.InlineKeyboardButton(t.I18nBot(spec.confirmLabelKey, "Num=="+value)).
+				WithCallbackData(t.encodeQuery(spec.dataBase+"_c "+spec.dataArgs+value)),
+		),
+		tu.InlineKeyboardRow(key("1", "1"), key("2", "2"), key("3", "3")),
+		tu.InlineKeyboardRow(key("4", "4"), key("5", "5"), key("6", "6")),
+		tu.InlineKeyboardRow(key("7", "7"), key("8", "8"), key("9", "9")),
+		tu.InlineKeyboardRow(key("🔄", "-2"), key("0", "0"), key("⬅️", "-1")),
+	)
+}

internal/web/service/tgbot/tgbot_router.go

@@ -460,34 +460,7 @@ func (t *Tgbot) answerCallback(callbackQuery *telego.CallbackQuery, isAdmin bool
 								return
 							}
 						}
-						inlineKeyboard := tu.InlineKeyboard(
+						inlineKeyboard := t.numericKeypad(numericKeypadSpec{dataBase: "limit_traffic", dataArgs: email + " ", cancelData: "client_cancel " + email, confirmLabelKey: "tgbot.buttons.confirmNumberAdd"}, inputNumber)
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.cancel")).WithCallbackData(t.encodeQuery("client_cancel "+email)),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.confirmNumberAdd", "Num=="+strconv.Itoa(inputNumber))).WithCallbackData(t.encodeQuery("limit_traffic_c "+email+" "+strconv.Itoa(inputNumber))),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("1").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 1")),
-								tu.InlineKeyboardButton("2").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 2")),
-								tu.InlineKeyboardButton("3").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 3")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("4").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 4")),
-								tu.InlineKeyboardButton("5").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 5")),
-								tu.InlineKeyboardButton("6").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 6")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("7").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 7")),
-								tu.InlineKeyboardButton("8").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 8")),
-								tu.InlineKeyboardButton("9").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 9")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("🔄").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" -2")),
-								tu.InlineKeyboardButton("0").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" 0")),
-								tu.InlineKeyboardButton("⬅️").WithCallbackData(t.encodeQuery("limit_traffic_in "+email+" "+strconv.Itoa(inputNumber)+" -1")),
-							),
-						)
 						t.editMessageCallbackTgBot(chatId, callbackQuery.Message.GetMessageID(), inlineKeyboard)
 						return
 					}
@@ -521,34 +494,7 @@ func (t *Tgbot) answerCallback(callbackQuery *telego.CallbackQuery, isAdmin bool
 								return
 							}
 						}
-						inlineKeyboard := tu.InlineKeyboard(
+						inlineKeyboard := t.numericKeypad(numericKeypadSpec{dataBase: "add_client_limit_traffic", cancelData: "add_client_default_traffic_exp", confirmLabelKey: "tgbot.buttons.confirmNumberAdd"}, inputNumber)
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.cancel")).WithCallbackData(t.encodeQuery("add_client_default_traffic_exp")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.confirmNumberAdd", "Num=="+strconv.Itoa(inputNumber))).WithCallbackData(t.encodeQuery("add_client_limit_traffic_c "+strconv.Itoa(inputNumber))),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("1").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 1")),
-								tu.InlineKeyboardButton("2").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 2")),
-								tu.InlineKeyboardButton("3").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 3")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("4").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 4")),
-								tu.InlineKeyboardButton("5").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 5")),
-								tu.InlineKeyboardButton("6").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 6")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("7").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 7")),
-								tu.InlineKeyboardButton("8").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 8")),
-								tu.InlineKeyboardButton("9").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 9")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("🔄").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" -2")),
-								tu.InlineKeyboardButton("0").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" 0")),
-								tu.InlineKeyboardButton("⬅️").WithCallbackData(t.encodeQuery("add_client_limit_traffic_in "+strconv.Itoa(inputNumber)+" -1")),
-							),
-						)
 						t.editMessageCallbackTgBot(chatId, callbackQuery.Message.GetMessageID(), inlineKeyboard)
 						return
 					}
@@ -642,34 +588,7 @@ func (t *Tgbot) answerCallback(callbackQuery *telego.CallbackQuery, isAdmin bool
 								return
 							}
 						}
-						inlineKeyboard := tu.InlineKeyboard(
+						inlineKeyboard := t.numericKeypad(numericKeypadSpec{dataBase: "reset_exp", dataArgs: email + " ", cancelData: "client_cancel " + email, confirmLabelKey: "tgbot.buttons.confirmNumber"}, inputNumber)
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.cancel")).WithCallbackData(t.encodeQuery("client_cancel "+email)),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.confirmNumber", "Num=="+strconv.Itoa(inputNumber))).WithCallbackData(t.encodeQuery("reset_exp_c "+email+" "+strconv.Itoa(inputNumber))),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("1").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 1")),
-								tu.InlineKeyboardButton("2").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 2")),
-								tu.InlineKeyboardButton("3").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 3")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("4").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 4")),
-								tu.InlineKeyboardButton("5").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 5")),
-								tu.InlineKeyboardButton("6").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 6")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("7").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 7")),
-								tu.InlineKeyboardButton("8").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 8")),
-								tu.InlineKeyboardButton("9").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 9")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("🔄").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" -2")),
-								tu.InlineKeyboardButton("0").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" 0")),
-								tu.InlineKeyboardButton("⬅️").WithCallbackData(t.encodeQuery("reset_exp_in "+email+" "+strconv.Itoa(inputNumber)+" -1")),
-							),
-						)
 						t.editMessageCallbackTgBot(chatId, callbackQuery.Message.GetMessageID(), inlineKeyboard)
 						return
 					}
@@ -715,34 +634,7 @@ func (t *Tgbot) answerCallback(callbackQuery *telego.CallbackQuery, isAdmin bool
 								return
 							}
 						}
-						inlineKeyboard := tu.InlineKeyboard(
+						inlineKeyboard := t.numericKeypad(numericKeypadSpec{dataBase: "add_client_reset_exp", cancelData: "add_client_default_traffic_exp", confirmLabelKey: "tgbot.buttons.confirmNumberAdd"}, inputNumber)
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.cancel")).WithCallbackData(t.encodeQuery("add_client_default_traffic_exp")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.confirmNumberAdd", "Num=="+strconv.Itoa(inputNumber))).WithCallbackData(t.encodeQuery("add_client_reset_exp_c "+strconv.Itoa(inputNumber))),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("1").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 1")),
-								tu.InlineKeyboardButton("2").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 2")),
-								tu.InlineKeyboardButton("3").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 3")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("4").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 4")),
-								tu.InlineKeyboardButton("5").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 5")),
-								tu.InlineKeyboardButton("6").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 6")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("7").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 7")),
-								tu.InlineKeyboardButton("8").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 8")),
-								tu.InlineKeyboardButton("9").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 9")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("🔄").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" -2")),
-								tu.InlineKeyboardButton("0").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" 0")),
-								tu.InlineKeyboardButton("⬅️").WithCallbackData(t.encodeQuery("add_client_reset_exp_in "+strconv.Itoa(inputNumber)+" -1")),
-							),
-						)
 						t.editMessageCallbackTgBot(chatId, callbackQuery.Message.GetMessageID(), inlineKeyboard)
 						return
 					}
@@ -812,34 +704,7 @@ func (t *Tgbot) answerCallback(callbackQuery *telego.CallbackQuery, isAdmin bool
 								return
 							}
 						}
-						inlineKeyboard := tu.InlineKeyboard(
+						inlineKeyboard := t.numericKeypad(numericKeypadSpec{dataBase: "ip_limit", dataArgs: email + " ", cancelData: "client_cancel " + email, confirmLabelKey: "tgbot.buttons.confirmNumber"}, inputNumber)
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.cancel")).WithCallbackData(t.encodeQuery("client_cancel "+email)),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.confirmNumber", "Num=="+strconv.Itoa(inputNumber))).WithCallbackData(t.encodeQuery("ip_limit_c "+email+" "+strconv.Itoa(inputNumber))),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("1").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 1")),
-								tu.InlineKeyboardButton("2").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 2")),
-								tu.InlineKeyboardButton("3").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 3")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("4").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 4")),
-								tu.InlineKeyboardButton("5").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 5")),
-								tu.InlineKeyboardButton("6").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 6")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("7").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 7")),
-								tu.InlineKeyboardButton("8").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 8")),
-								tu.InlineKeyboardButton("9").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 9")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("🔄").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" -2")),
-								tu.InlineKeyboardButton("0").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" 0")),
-								tu.InlineKeyboardButton("⬅️").WithCallbackData(t.encodeQuery("ip_limit_in "+email+" "+strconv.Itoa(inputNumber)+" -1")),
-							),
-						)
 						t.editMessageCallbackTgBot(chatId, callbackQuery.Message.GetMessageID(), inlineKeyboard)
 						return
 					}
@@ -876,34 +741,7 @@ func (t *Tgbot) answerCallback(callbackQuery *telego.CallbackQuery, isAdmin bool
 								return
 							}
 						}
-						inlineKeyboard := tu.InlineKeyboard(
+						inlineKeyboard := t.numericKeypad(numericKeypadSpec{dataBase: "add_client_ip_limit", cancelData: "add_client_default_ip_limit", confirmLabelKey: "tgbot.buttons.confirmNumber"}, inputNumber)
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.cancel")).WithCallbackData(t.encodeQuery("add_client_default_ip_limit")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton(t.I18nBot("tgbot.buttons.confirmNumber", "Num=="+strconv.Itoa(inputNumber))).WithCallbackData(t.encodeQuery("add_client_ip_limit_c "+strconv.Itoa(inputNumber))),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("1").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 1")),
-								tu.InlineKeyboardButton("2").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 2")),
-								tu.InlineKeyboardButton("3").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 3")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("4").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 4")),
-								tu.InlineKeyboardButton("5").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 5")),
-								tu.InlineKeyboardButton("6").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 6")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("7").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 7")),
-								tu.InlineKeyboardButton("8").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 8")),
-								tu.InlineKeyboardButton("9").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 9")),
-							),
-							tu.InlineKeyboardRow(
-								tu.InlineKeyboardButton("🔄").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" -2")),
-								tu.InlineKeyboardButton("0").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" 0")),
-								tu.InlineKeyboardButton("⬅️").WithCallbackData(t.encodeQuery("add_client_ip_limit_in "+strconv.Itoa(inputNumber)+" -1")),
-							),
-						)
 						t.editMessageCallbackTgBot(chatId, callbackQuery.Message.GetMessageID(), inlineKeyboard)
 						return
 					}