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use crate::Cursor;
use std::borrow::Cow;
use html_escape::encode_text;
use lazy_static::lazy_static;
use regex::Regex;
use stacked_errors::{
bail,
Result,
};
lazy_static! {
pub static ref RE_DOMAIN: Regex = Regex::new(r"^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$").unwrap();
pub static ref RE_CLOSING: Regex = Regex::new(r"</[ \t]*(pre|code)[ \t]*>").unwrap();
}
/// `Attachment` object to store number attachment data and corresponding file name
#[derive(Debug)]
pub struct Attachment {
pub data: Cursor<Vec<u8>>,
pub name: String,
}
/// Pass any text here to be validated as not breaking from Telegram preformatted blocks
/// escape all HTML chars afterwards
pub fn validate (text: &str) -> Result<&str> {
pub fn validate (text: &str) -> Result<Cow<'_, str>> {
if RE_CLOSING.is_match(text) {
bail!("Telegram closing tag found.");
} else {
Ok(text)
Ok(encode_text(text))
}
}
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