telegram-bot-api pagination example

main.go

package main

import (
	"fmt"
	"strconv"
	"strings"

	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api"
)

var data = []string{"DummyData1", "DummyData2", "DummyData3", "DummyData4", "DummyData5", "DummyData6", "DummyData7", "DummyData8", "DummyData9", "DummyData10"}
var count = 2
var maxPages = len(data) / count
var chatId = int64(0) // <--- Place Chat Id Here

var bot *tgbotapi.BotAPI

func main() {
	var token = "" // <-- Place Bot Token Here
	var err error
	bot, err = tgbotapi.NewBotAPI(token)
	if err != nil {
		fmt.Println(err)
		return
	}

	SendDummyData(chatId, 0, 2, nil)

	u := tgbotapi.NewUpdate(0)
	u.Timeout = 60

	updates, err := bot.GetUpdatesChan(u)

	for update := range updates {
		if update.CallbackQuery != nil {
			CallbackQueryHandler(update.CallbackQuery)
			continue
		}
	}
}

func CallbackQueryHandler(query *tgbotapi.CallbackQuery) {
	split := strings.Split(query.Data, ":")
	if split[0] == "pager" {
		HandleNavigationCallbackQuery(query.Message.MessageID, split[1:]...)
		return
	}
}

func HandleNavigationCallbackQuery(messageId int, data ...string) {
	pagerType := data[0]
	currentPage, _ := strconv.Atoi(data[1])
	itemsPerPage, _ := strconv.Atoi(data[2])

	if pagerType == "next" {
		nextPage := currentPage + 1
		if nextPage < maxPages {
			SendDummyData(chatId, nextPage, itemsPerPage, &messageId)
		}
	}
	if pagerType == "prev" {
		previousPage := currentPage - 1
		if previousPage >= 0 {
			SendDummyData(chatId, previousPage, itemsPerPage, &messageId)
		}
	}
}

func DummyDataTextMarkup(currentPage, count int) (text string, markup tgbotapi.InlineKeyboardMarkup) {
	text = strings.Join(data[currentPage*count:currentPage*count+count], "\n")

	var rows []tgbotapi.InlineKeyboardButton
	if currentPage > 0 {
		rows = append(rows, tgbotapi.NewInlineKeyboardButtonData("Previous", fmt.Sprintf("pager:prev:%d:%d", currentPage, count)))
	}
	if currentPage < maxPages-1 {
		rows = append(rows, tgbotapi.NewInlineKeyboardButtonData("Next", fmt.Sprintf("pager:next:%d:%d", currentPage, count)))
	}

	markup = tgbotapi.NewInlineKeyboardMarkup(rows)
	return
}

func SendDummyData(chatId int64, currentPage, count int, messageId *int) {
	text, keyboard := DummyDataTextMarkup(currentPage, count)

	var cfg tgbotapi.Chattable
	if messageId == nil {
		msg := tgbotapi.NewMessage(81997375, text)
		msg.ReplyMarkup = keyboard
		cfg = msg
	} else {
		msg := tgbotapi.NewEditMessageText(chatId, *messageId, text)
		msg.ReplyMarkup = &keyboard
		cfg = msg
	}

	bot.Send(cfg)
}

Bro, thanks for the help with the stackoverflow. I am very glad that there was a person who could help with this. Can you give your contacts? I want to ask a few questions, if you don't mind. Thanks!

You're welcome. you can message me on Telegram at https://t.me/ali_error