handle_navigation.go

package bot

import (
	"context"
	"fmt"
	"regexp"
	"strings"

	"github.com/dimboknv/tg-stand-with-ukraine/app/hub"
	"github.com/dimboknv/tg-stand-with-ukraine/app/store"
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
	"github.com/pkg/errors"
)

var (
	tmeRegexp      = regexp.MustCompile(`(?m)(http://www\.|https://www\.|http://|https://)?t\.me/[^\s]*`)
	usernameRegexp = regexp.MustCompile(`(?m)@\S*`)
	digitsRegexp   = regexp.MustCompile(`\D+`)
)

func parseChanelURLs(u tgbotapi.Update) []string {
	urls := make([]string, 0)
	for _, e := range u.Message.Entities {
		url := strings.TrimSpace(e.URL)
		if url == "" {
			continue
		}
		switch e.Type {
		case "text_link", "url":
			if tmeRegexp.MatchString(url) {
				urls = append(urls, url)
			}
		case "mention":
			urls = append(urls, url)
		}
	}
	if len(urls) > 0 {
		return urls
	}

	urls = tmeRegexp.FindAllString(u.Message.Text, -1)
	urls = append(urls, usernameRegexp.FindAllString(u.Message.Text, -1)...)

	for i := range urls {
		urls[i] = strings.TrimSpace(urls[i])
	}
	return urls
}

// nolint:gocyclo // user has many input sources
func getMessageText(user store.User, chatID int64, u tgbotapi.Update) string {
	msg, cbq, userChat := u.Message, u.CallbackQuery, user.Chats[chatID]
	switch {
	case cbq != nil && cbq.Message != nil && cbq.Message.MessageID == userChat.ReplyMsgID:
		return cbq.Data
	case msg != nil && msg.ReplyToMessage != nil && msg.ReplyToMessage.MessageID == userChat.ReplyMsgID && msg.Contact != nil:
		return msg.Contact.PhoneNumber
	case msg != nil && msg.Contact != nil:
		return msg.Contact.PhoneNumber
	case u.Message != nil:
		return u.Message.Text
	default:
		return ""
	}
}

func parsePhone(txt string) (phone string, err error) {
	phone = "+" + digitsRegexp.ReplaceAllString(txt, "")
	//+380-44-xxx-xx-xx
	if len(phone) != 13 {
		return "", &userError{
			Err:     errors.Errorf("invalid phone number: %q", phone),
			UserMsg: fmt.Sprintf("Invalid phone number. Try again /%s", store.LogInCommand),
		}
	}
	return phone, nil
}

func (b *Bot) phoneNavigation(ctx context.Context, user store.User, chatID int64, u tgbotapi.Update) error {
	phone, err := parsePhone(getMessageText(user, chatID, u))
	if err != nil {
		return err
	}

	txt, navigation := "Send pass code", store.CodeNavigation
	if phone == user.Phone {
		// nolint
		txt = `You are trying to log in with you current account and telegram does not allow to send secure code in one message to anyone.

Please, split secure code and send by 2 messages. For example, you got "12345" then send 1-th message with text "123" and 2-th message with "45". You can split code in any combination except full code.

Send 1-th part`
		navigation = store.SplitCode1Navigation
	}

	user.Chats[chatID].Navigation, user.Chats[chatID].AuthPhone = navigation, phone
	if err := b.db.PutUser(user); err != nil {
		return err
	}
	if err := b.hub.AuthPhone(ctx, user, phone); err != nil {
		if errors.Is(err, hub.AlreadyAuthorizedErr) {
			return &userError{
				Err:     err,
				UserMsg: "Already authorized",
			}
		}
		return errors.Wrapf(err, "can`t start auth for %q", phone)
	}

	msg := tgbotapi.NewMessage(chatID, txt)
	msg.ReplyMarkup = tgbotapi.NewRemoveKeyboard(false)
	if _, err := b.bot.Send(msg); err != nil {
		return err
	}
	return nil
}

func (b *Bot) splitCode1Navigation(ctx context.Context, user store.User, chatID int64, u tgbotapi.Update) error {
	user.Chats[chatID].Navigation = store.SplitCode2Navigation
	user.Chats[chatID].AuthCode = strings.TrimSpace(getMessageText(user, chatID, u))
	user.Chats[chatID].DeleteMsgIDs = append(user.Chats[chatID].DeleteMsgIDs, u.Message.MessageID)
	if err := b.db.PutUser(user); err != nil {
		return err
	}
	return b.sendMsg(chatID, "Send 2-th part")
}

func (b *Bot) splitCode2Navigation(ctx context.Context, user store.User, chatID int64, u tgbotapi.Update) error {
	user.Chats[chatID].AuthCode += strings.TrimSpace(getMessageText(user, chatID, u))
	user.Chats[chatID].DeleteMsgIDs = append(user.Chats[chatID].DeleteMsgIDs, u.Message.MessageID)
	if err := b.db.PutUser(user); err != nil {
		return err
	}
	return b.startHubAuth(ctx, user, chatID, user.Chats[chatID].AuthCode)
}

func (b *Bot) codeNavigation(ctx context.Context, user store.User, chatID int64, u tgbotapi.Update) error {
	user.Chats[chatID].DeleteMsgIDs = append(user.Chats[chatID].DeleteMsgIDs, u.Message.MessageID)
	if err := b.db.PutUser(user); err != nil {
		return err
	}
	return b.startHubAuth(ctx, user, chatID, strings.TrimSpace(getMessageText(user, chatID, u)))
}

func (b *Bot) startHubAuth(ctx context.Context, user store.User, chatID int64, code string) error {
	req2fa, err := b.hub.AuthCode(ctx, user, user.Chats[chatID].AuthPhone, code)
	if err != nil {
		return &userError{
			Err:     errors.Wrapf(err, "can`t verify code for %q", user.Chats[chatID].AuthPhone),
			UserMsg: "Sorry, can't verify code",
		}
	}

	if user, err = b.db.GetUser(user.ID); err != nil {
		return err
	}
	if err := b.deleteChatMessages(chatID, user.Chats[chatID].DeleteMsgIDs...); err != nil {
		return err
	}
	msg := fmt.Sprintf("Thanks! %q is successfully logged in!", user.Chats[chatID].AuthPhone)
	user.Chats[chatID].Navigation = store.UserNavigation
	user.Chats[chatID].DeleteMsgIDs = nil
	if req2fa {
		msg = "Send 2FA code"
		user.Chats[chatID].Navigation = store.Pass2faNavigation
	}
	if err := b.db.PutUser(user); err != nil {
		return err
	}
	return b.sendMsg(chatID, msg)
}

func (b *Bot) pass2faNavigation(ctx context.Context, user store.User, chatID int64, u tgbotapi.Update) error {
	pass2fa := strings.TrimSpace(getMessageText(user, chatID, u))
	user.Chats[chatID].DeleteMsgIDs = append(user.Chats[chatID].DeleteMsgIDs, u.Message.MessageID)
	if err := b.deleteChatMessages(chatID, user.Chats[chatID].DeleteMsgIDs...); err != nil {
		return err
	}
	user.Chats[chatID].Navigation = store.UserNavigation
	user.Chats[chatID].DeleteMsgIDs = nil
	if err := b.db.PutUser(user); err != nil {
		return err
	}
	if err := b.hub.AuthPass2FA(ctx, user, user.Chats[chatID].AuthPhone, pass2fa); err != nil {
		return &userError{
			Err:     errors.Wrapf(err, "can`t verify 2FA password for %q", user.Chats[chatID].AuthPhone),
			UserMsg: "Sorry, can't verify 2FA password",
		}
	}
	return b.sendMsg(chatID, fmt.Sprintf("Thanks! %q is successfully logged in!", user.Chats[chatID].AuthPhone))
}

func (b *Bot) userNavigation(ctx context.Context, user store.User, chatID int64, u tgbotapi.Update) error {
	if _, has := b.admins[u.SentFrom().UserName]; !has {
		return nil
	}

	urls := parseChanelURLs(u)

	if err := b.reporter.AddRashists(ctx, urls); err != nil {
		return err
	}

	msg := tgbotapi.NewMessage(chatID, fmt.Sprintf("%d new urls added", len(urls)))
	msg.ReplyToMessageID = u.Message.MessageID
	_, err := b.bot.Send(msg)
	return err
}

func (b *Bot) sharePhoneNavigation(ctx context.Context, user store.User, chatID int64, u tgbotapi.Update) error {
	phone, err := parsePhone(getMessageText(user, chatID, u))
	if err != nil {
		return err
	}

	user.Phone = phone
	user.Chats[chatID].Navigation = store.PhoneNavigation
	if err := b.db.PutUser(user); err != nil {
		return err
	}

	msg := tgbotapi.NewMessage(chatID, "Thank")
	msg.ReplyMarkup = tgbotapi.NewRemoveKeyboard(false)
	if _, err := b.bot.Send(msg); err != nil {
		return err
	}

	return b.sendInlineKbWithPhone(user, chatID, phone)
}

func (b *Bot) sendInlineKbWithPhone(user store.User, chatID int64, phone string) error {
	msg := tgbotapi.NewMessage(chatID, "Send phone number")
	msg.ReplyMarkup = tgbotapi.NewInlineKeyboardMarkup(tgbotapi.NewInlineKeyboardRow(
		tgbotapi.NewInlineKeyboardButtonData(phone, phone)),
	)

	resp, err := b.bot.Send(msg)
	if err != nil {
		return err
	}
	user.Chats[chatID].ReplyMsgID = resp.MessageID
	return b.db.PutUser(user)
}

func (b *Bot) deleteChatMessages(chatID int64, ids ...int) error {
	for _, id := range ids {
		if _, err := b.bot.Request(tgbotapi.NewDeleteMessage(chatID, id)); err != nil {
			return err
		}
	}
	return nil
}