html.rs

use super::page::Page;
use regex::{Captures, Regex};
use serde::{Deserialize, Serialize};

// const CSS_LINK_FRAGMENT: &'static str = "<link rel='stylesheet' href='{url}'>";
// const SCRIPT_FRAGMENT: &'static str = "<script src='{url}'></script>";

const HTML_DOC_TEMPLATE: &'static str = "
<html lang='{lang}'>
<head>
    <meta charset='UTF-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>
    <meta name='description' content='{description}'>
    <title>{title}</title>
    {css}
</head>

<body>
    {body}
</body>

{js}

</html>
";

#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct HtmlDoc(String);

impl HtmlDoc {
    pub fn from_page(page: &Page) -> Self {
        let re = Regex::new(r#"\{[a-z]+\}"#).unwrap();

        let html = re
            .replace_all(HTML_DOC_TEMPLATE, |captures: &Captures| {
                let placeholder = captures.iter().next().unwrap().unwrap().as_str();
                let placeholder = placeholder[1..placeholder.len() - 1].to_owned(); // strip the brackets
                page.text_from_key(placeholder)
            })
            .to_string();

        HtmlDoc(html)
    }

    pub fn empty() -> Self {
        HtmlDoc(String::new())
    }
}

impl std::fmt::Display for HtmlDoc {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}