Lines of src/utils.rs from check-in 6ce625a569 that are changed by the sequence of edits moving toward check-in dafeec0481:

                         1: use crate::Cursor;
                         2: 
                         3: use lazy_static::lazy_static;
                         4: use regex::Regex;
6ce625a569 2026-01-12    5: use scraper::Html;
                         6: use stacked_errors::{
                         7: 	bail,
                         8: 	Result,
                         9: };
                        10: 
                        11: lazy_static! {
                        12: 	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();
                        13: }
                        14: 
                        15: /// `Attachment` object to store number attachment data and corresponding file name
                        16: #[derive(Debug)]
                        17: pub struct Attachment {
                        18: 	pub data: Cursor<Vec<u8>>,
                        19: 	pub name: String,
                        20: }
                        21: 
6ce625a569 2026-01-12   22: /// Pass any text here to be validated as HTML, breaks on validation errors
                        23: pub fn validate (text: &str) -> Result<&str> {
6ce625a569 2026-01-12   24: 	// Technically full validation is not needed nor required here, all text after validation
6ce625a569 2026-01-12   25: 	// is used in Telegram messages as RAW text enclosed in `pre`/`code` tags, so the only reason
6ce625a569 2026-01-12   26: 	// for this check is to make sure there's no dangling closing tags in the text that might
6ce625a569 2026-01-12   27: 	// break Telegram message formatting
6ce625a569 2026-01-12   28: 	let fragment = Html::parse_fragment(text);
6ce625a569 2026-01-12   29: 	if !fragment.errors.is_empty() {
6ce625a569 2026-01-12   30: 		bail!(fragment.errors.join("\n"));
                        31: 	}
6ce625a569 2026-01-12   32: 	Ok(text)
                        33: }