Grammyjs Stepping Issue

find-mentors.feature.ts

import { Composer } from "grammy";
import { Router } from "@grammyjs/router";
import { isPrivate } from "grammy-guard";
import { Context } from "@bot/types";
import { selectSpecializationKeyboard } from "@bot/keyboards";
import tryToFindMentors from "@bot/helpers/try-to-find-mentors";
import paginate from "@bot/helpers/pagination";
import { Menu } from "@grammyjs/menu";
import { logger } from "@bot/logger";

export const composer = new Composer<Context>().filter(isPrivate);
const router = new Router<Context>((ctx) => {
  logger.info({
    msg: "logging routing",
    session_step: ctx.session.step,
  });
  return ctx.session.step;
});
const displayMentorsPageSize = 5;

composer.command("find_mentors", async (ctx) => {
  await ctx.reply(ctx.t("FILL_NAME"));
  ctx.session.step = "gotName";
});

composer.use(selectSpecializationKeyboard);

router.route("gotName", async (ctx) => {
  await ctx.reply(ctx.t("CHOOSE_SPECIALIZATION"), {
    reply_markup: selectSpecializationKeyboard,
  });
  ctx.session.step = "gotSpecialization";
});

router.route("gotSpecialization", async (ctx) => {
  ctx.session.step = "gotYearsOfExperience";
  await ctx.reply(ctx.t("YEARS_OF_EXPERIENCE"));
  return;
});

router.route("gotYearsOfExperience", async (ctx) => {
  if (!validateYearsOfExperience(ctx)) {
    logger.info({
      msg: "gotYearsOfExperienceHandler If",
    });
    await ctx.reply(ctx.t("YEARS_OF_EXPERIENCE_WRONG"));
    return;
  } else {
    logger.info({
      msg: "gotYearsOfExperienceHandler Else",
    });
    ctx.session.step = "displayMentors";
    return;
  }
});

const displayMentorsMenu = new Menu<Context>("display-mentors")
  .text("Показать ещё", (ctx) => {
    ctx.session.step = "displayMentors";
  })
  .text("Я нашел", (ctx) => ctx.reply("До новых встреч!"))
  .row();

router.route("displayMentors", async (ctx) => {
  if (!ctx.session.mentors || ctx.session.mentors.length === 0) {
    const mentors = await tryToFindMentors();
    ctx.session.mentors = mentors;
    ctx.session.mentorsPage = 1;
  }

  if (ctx.session.mentors.length > 0) {
    await ctx.reply(ctx.t("BOT_FOUND_MENTORS"));

    const pagination = paginate(
      ctx.session.mentors.length,
      ctx.session.mentorsPage,
      displayMentorsPageSize
    );

    if (ctx.session.mentorsPage > pagination.endPage) {
      await ctx.reply(ctx.t("NO_MENTORS_FOUND"));
    }

    const replies = ctx.session.mentors
      .slice(pagination.startIndex, pagination.endIndex + 1)
      .map((mentor) => {
        return ctx.reply(
          `👤 ${mentor.name}\nОпыт: ${mentor.yearsOfExperience} года`
        );
      });

    ctx.session.mentorsPage += 1;
    await Promise.all(replies);

    await ctx.reply(ctx.t("MENTORS_FOUND"), {
      reply_markup: displayMentorsMenu,
    });
  } else {
    await ctx.reply(ctx.t("NO_MENTORS_FOUND"));
  }
});

const validateYearsOfExperience = (ctx: Context) => {
  if (ctx.msg !== undefined && ctx.msg.text !== undefined) {
    return (
      !isNaN(parseFloat(String(ctx.msg.text!))) &&
      isFinite(Number(ctx.msg.text!))
    );
  } else {
    return false;
  }
};

composer.use(displayMentorsMenu);
composer.use(router);