pub trait SelectorBase {
    fn from_html(html: String) -> Self;

    fn html(&self) -> String;

    fn css<T: SelectorBase>(&self, css_selector: &'static str) -> Vec<T> {
        let html = nipper::Document::from(self.html().as_str());

        let mut output = vec![];

        for item in html.select(css_selector).iter() {
            output.push(T::from_html(item.html().to_string()))
        }
        output
    }

    fn css_once<T: SelectorBase>(&self, css_selector: &'static str) -> Option<T> {
        self.css(css_selector).pop()
    }

    fn content(&self) -> String {
        let html = nipper::Document::from(self.html().as_str());
        html.select("*")
            .iter()
            .map(|element| element.text().to_string())
            .last()
            .unwrap()
    }
}

#[derive(Debug)]
pub struct Selector {
    text: String,
}

impl SelectorBase for Selector {
    fn from_html(html: String) -> Self {
        Selector {
            text: html.to_string(),
        }
    }

    fn html(&self) -> String {
        format!("{}", self.text)
    }
}