1package telegram
  2
  3import (
  4	"fmt"
  5	"regexp"
  6
  7	tgbotapi "github.com/BiRabittoh/telegram-bot-api/v5"
  8)
  9
 10type Replacer struct {
 11	Regex  *regexp.Regexp
 12	Format string
 13}
 14
 15const (
 16	parseMode   = "markdown"
 17	linkMessage = "[🔗](%s) Da %s."
 18	regexFlags  = "(?i)(?m)"
 19)
 20
 21var replacers = []Replacer{
 22	{
 23		Regex:  regexp.MustCompile(regexFlags + `(?:(?:https?:)?\/\/)?(?:(?:www|m)\.)?(?:(?:youtube(?:-nocookie)?\.com|youtu.be))(?:\/(?:[\w\-]+\?v=|embed\/|live\/|v\/|shorts\/)?)([\w\-]+)`),
 24		Format: "https://y.outube.duckdns.org/%s",
 25	},
 26	{
 27		Regex:  regexp.MustCompile(regexFlags + `https?:\/\/(?:www\.)?twitter\.com\/(?:#!\/)?(.*)\/status(?:es)?\/([^\/\?\s]+)`),
 28		Format: "https://fxtwitter.com/%s/status/%s",
 29	},
 30	{
 31		Regex:  regexp.MustCompile(regexFlags + `(?:https?:\/\/)?(?:www\.)?x\.com\/(?:#!\/)?(.*)\/status(?:es)?\/([^\/\?\s]+)`),
 32		Format: "https://fixupx.com/%s/status/%s",
 33	},
 34	{
 35		Regex:  regexp.MustCompile(regexFlags + `(?:https?:\/\/)?(?:www\.)?instagram\.com\/(reels?|p)\/([\w\-]{11})[\/\?\w=&]*`),
 36		Format: "https://ddinstagram.com/%s/%s",
 37	},
 38	{
 39		Regex:  regexp.MustCompile(regexFlags + `https?:\/\/(?:(?:www)|(?:vm))?\.?tiktok\.com\/@([\w.]+)\/(?:video)\/(\d{19,})`),
 40		Format: "https://www.tnktok.com/@%s/video/%s",
 41	},
 42	{
 43		Regex:  regexp.MustCompile(regexFlags + `(?:https?:\/\/)?(?:(?:www)|(?:vm))?\.?tiktok\.com\/(?:t\/)?([\w]{9})\/?`),
 44		Format: "https://vm.tnktok.com/%s/",
 45	},
 46}
 47
 48func parseText(message string) []string {
 49	links := []string{}
 50
 51	for _, replacer := range replacers {
 52		foundMatches := replacer.Regex.FindStringSubmatch(message)
 53
 54		if len(foundMatches) == 0 {
 55			continue
 56		}
 57		captureGroups := foundMatches[1:]
 58
 59		var formatArgs []interface{}
 60		for _, match := range captureGroups {
 61			if match != "" {
 62				formatArgs = append(formatArgs, match)
 63			}
 64		}
 65
 66		formatted := fmt.Sprintf(replacer.Format, formatArgs...)
 67		links = append(links, formatted)
 68	}
 69	return links
 70}
 71
 72func getUserMention(user tgbotapi.User) string {
 73	var name string
 74	if user.UserName == "" {
 75		name = user.FirstName + user.LastName
 76	} else {
 77		name = "@" + user.UserName
 78	}
 79	return fmt.Sprintf("[%s](tg://user?id=%d)", name, user.ID)
 80}
 81
 82func handleLinks(bot *tgbotapi.BotAPI, message *tgbotapi.Message) {
 83	links := []string{}
 84
 85	if message.Text != "" {
 86		textLinks := parseText(message.Text)
 87		links = append(links, textLinks...)
 88	}
 89
 90	if message.Caption != "" {
 91		captionLinks := parseText(message.Caption)
 92		links = append(links, captionLinks...)
 93	}
 94
 95	if len(links) == 0 {
 96		return
 97	}
 98
 99	user := getUserMention(*message.From)
100
101	for _, link := range links {
102		text := fmt.Sprintf(linkMessage, link, user)
103		msg := tgbotapi.NewMessage(message.Chat.ID, text)
104		msg.MessageThreadID = message.MessageThreadID
105		msg.ParseMode = parseMode
106		bot.Send(msg)
107	}
108
109}