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use anyhow::{anyhow, Context, Result};
#[derive(Debug)]
struct TgLink {
username: String,
message_id: usize,
}
impl TgLink {
fn to_url(&self) -> String {
format!("https://t.me/{}/{}?embed=1", self.username, self.message_id)
}
}
fn fetch_embed(link: &TgLink) -> Result<String> {
let response = crimp::Request::get(&link.to_url())
.send()
.context("failed to fetch embed data")?
.as_string()
.context("failed to decode embed data")?
.error_for_status(|resp| {
anyhow!("telegram request failed: {} ({})", resp.body, resp.status)
})?;
Ok(response.body)
}
#[derive(Debug)]
struct TgMessage {
author: String,
message: Option<String>,
photos: Vec<String>,
}
fn extract_photo_url(style: &str) -> Option<&str> {
let url_start = style.find("url('")? + 5;
let url_end = style.find("')")?;
Some(&style[url_start..url_end])
}
fn parse_tgmessage(embed: &str) -> Result<TgMessage> {
use scraper::{Html, Selector};
let doc = Html::parse_document(embed);
let author_sel = Selector::parse("a.tgme_widget_message_owner_name").unwrap();
let author = doc
.select(&author_sel)
.next()
.ok_or_else(|| anyhow!("failed to find message author"))?
.text()
.collect::<Vec<&str>>()
.concat();
let msg_sel = Selector::parse("div.tgme_widget_message_text.js-message_text").unwrap();
let message = doc
.select(&msg_sel)
.next()
.map(|m| m.text().collect::<Vec<&str>>().concat());
let photo_sel = Selector::parse("a.tgme_widget_message_photo_wrap").unwrap();
let mut photos = vec![];
for photo in doc.select(&photo_sel) {
if let Some(style) = photo.value().attr("style") {
if let Some(url) = extract_photo_url(style) {
photos.push(url.to_string())
}
}
}
Ok(TgMessage {
author,
message,
photos,
})
}
fn shorten_photo_links(msg: &mut TgMessage) -> Result<()> {
let mut url = url::Url::parse("https://tinyurl.com/api-create.php")?;
let mut shortened = vec![];
for photo in &msg.photos {
url.query_pairs_mut().clear().append_pair("url", &photo);
let request = url.as_str();
let response = crimp::Request::get(request)
.send()
.context("failed to shorten URL")?
.as_string()
.context("failed to decode shortened URL")?
.error_for_status(|resp| {
anyhow!("tinyurl request failed: {} ({})", resp.body, resp.status)
})?;
shortened.push(response.body.trim().into());
}
msg.photos = shortened;
Ok(())
}
fn to_bbcode(link: &TgLink, msg: &TgMessage) -> String {
let mut out = String::new();
out.push_str(&format!("[quote=\"{}\"]\n", msg.author));
for photo in &msg.photos {
out.push_str(&format!("[timg]{}[/timg]\n", photo));
}
if let Some(message) = &msg.message {
out.push_str(message);
}
out.push_str("\n[/quote]\n");
out.push_str(&format!(
"[i](via [url=\"{}\"]Telegram[/url])[/i]",
link.to_url(),
));
return out;
}
fn main() {
crimp::init();
let link = TgLink {
username: "RWApodcast".into(),
message_id: 113,
};
let embed = fetch_embed(&link).unwrap();
let mut msg = parse_tgmessage(&embed).unwrap();
shorten_photo_links(&mut msg).unwrap();
println!("{}", to_bbcode(&link, &msg));
}
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