use anyhow::{Result};

use scraper;
use std::string::String;

/// Extract element text, trimmed of whitespace.
fn element_text(element: scraper::ElementRef<'_>) -> String {
    let text = element
        .text()
        .map(|s| s.trim_matches(char::is_whitespace))
        .filter(|x| !x.is_empty())
        .collect::<String>();
    text
}
pub fn find_useragents(html: &str) -> Result<Vec<String>> {
    let mut result = Vec::<String>::new();
    let document = scraper::Html::parse_document(&html);
    let select = scraper::Selector::parse(r#"li > span[class="code"]"#).unwrap();
    for s in document.select(&select) {
        result.push(element_text(s))
    }
    Ok(result)
}