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pub static ref RE_SPECIAL: Regex = Regex::new(r"([\-_*\[\]()~`>#+|{}\.!])").unwrap();
}
/// Encodes special HTML entities to prevent them interfering with Telegram HTML
pub fn encode (text: &str) -> Cow<'_, str> {
RE_SPECIAL.replace_all(text, "\\$1")
}
// This one does nothing except making sure only one token exists for each id
pub struct Token {
running: Arc<Mutex<HashSet<i32>>>,
my_id: i32,
}
impl Token {
fn new (running: &Arc<Mutex<HashSet<i32>>>, my_id: i32) -> Option<Token> {
let running = running.clone();
smol::block_on(async {
let mut set = running.lock_arc().await;
if set.contains(&my_id) {
None
} else {
set.insert(my_id);
Some(Token {
running,
my_id,
})
}
})
}
}
impl Drop for Token {
fn drop (&mut self) {
smol::block_on(async {
let mut set = self.running.lock_arc().await;
set.remove(&self.my_id);
})
}
}
#[derive(Clone)]
pub struct Core {
owner_chat: ChatPeerId,
// max_delay: u16,
pub tg: Client,
pub me: Bot,
pub db: Db,
sources: Arc<Mutex<HashSet<Arc<i32>>>>,
running: Arc<Mutex<HashSet<i32>>>,
http_client: reqwest::Client,
}
pub struct Post {
uri: String,
title: String,
authors: String,
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).await.stack()
}
pub async fn check (&self, id: i32, real: bool, last_scrape: Option<DateTime<Local>>) -> Result<String> {
let mut posted: i32 = 0;
let mut conn = self.db.begin().await.stack()?;
let id = {
let mut set = self.sources.lock_arc().await;
match set.get(&id) {
Some(id) => id.clone(),
None => {
let id = Arc::new(id);
set.insert(id.clone());
id.clone()
},
}
};
let count = Arc::strong_count(&id);
if count == 2 {
let source = conn.get_source(*id, self.owner_chat).await.stack()?;
conn.set_scrape(*id).await.stack()?;
let destination = ChatPeerId::from(match real {
true => source.channel_id,
false => source.owner,
});
let mut this_fetch: Option<DateTime<chrono::FixedOffset>> = None;
let mut posts: BTreeMap<DateTime<chrono::FixedOffset>, Post> = BTreeMap::new();
let mut builder = self.http_client.get(&source.url);
if let Some(last_scrape) = last_scrape {
builder = builder.header(LAST_MODIFIED, last_scrape.to_rfc2822());
};
let response = builder.send().await.stack()?;
{
let headers = response.headers();
let expires = headers.get(EXPIRES);
let cache = headers.get(CACHE_CONTROL);
if expires.is_some() || cache.is_some() {
println!("{} {} {:?} {:?} {:?}", Local::now().to_rfc2822(), &source.url, last_scrape, expires, cache);
}
}
let status = response.status();
let content = response.bytes().await.stack()?;
match rss::Channel::read_from(&content[..]) {
Ok(feed) => {
for item in feed.items() {
if let Some(link) = item.link() {
let date = match item.pub_date() {
Some(feed_date) => DateTime::parse_from_rfc2822(feed_date),
None => DateTime::parse_from_rfc3339(&item.dublin_core_ext().unwrap().dates()[0]),
}.stack()?;
let uri = link.to_string();
let title = item.title().unwrap_or("").to_string();
let authors = item.author().unwrap_or("").to_string();
let summary = item.content().unwrap_or("").to_string();
posts.insert(date, Post{
uri,
title,
authors,
summary,
});
}
};
},
Err(err) => match err {
rss::Error::InvalidStartTag => {
match atom_syndication::Feed::read_from(&content[..]) {
Ok(feed) => {
for item in feed.entries() {
let date = item.published().unwrap();
let uri = item.links()[0].href().to_string();
let title = item.title().to_string();
let authors = item.authors().iter().map(|x| format!("{} <{:?}>", x.name(), x.email())).collect::<Vec<String>>().join(", ");
let summary = if let Some(sum) = item.summary() { sum.value.clone() } else { String::new() };
posts.insert(*date, Post{
uri,
title,
authors,
summary,
});
};
},
Err(err) => {
bail!("Unsupported or mangled content:\n{:?}\n{err}\n{status:#?}\n", &source.url)
},
}
},
rss::Error::Eof => (),
_ => bail!("Unsupported or mangled content:\n{:?}\n{err}\n{status:#?}\n", &source.url)
}
};
for (date, post) in posts.iter() {
let post_url: Cow<str> = match source.url_re {
Some(ref x) => sedregex::ReplaceCommand::new(x).stack()?.execute(&post.uri),
None => post.uri.clone().into(),
};
if let Some(exists) = conn.exists(&post_url, *id).await.stack()? {
if ! exists {
if this_fetch.is_none() || *date > this_fetch.unwrap() {
this_fetch = Some(*date);
};
self.send( match &source.iv_hash {
Some(hash) => format!("<a href=\"https://t.me/iv?url={post_url}&rhash={hash}\"> </a>{post_url}"),
None => format!("{post_url}"),
}, Some(destination), Some(ParseMode::Html)).await.stack()?;
conn.add_post(*id, date, &post_url).await.stack()?;
};
};
posted += 1;
};
posts.clear();
};
|