use anyhow::{Context, Result};
use url::Url;

/// Convert relate to absolute
pub fn relative_to_absolute(base_url: &str, relative_href: &str) -> Result<String> {
    let base_url = Url::parse(base_url).context(format!("Url::parse({})", base_url))?;
    let new_url = base_url
        .join(relative_href)
        .context(format!("join({})", relative_href))?;
    Ok(new_url.to_string())
}

// Should this always fetch it/save?
pub fn fetch(client: &reqwest::blocking::Client, url: &str) -> Result<String> {
    let res = client.get(url).send()?;
    let buffer = res.text()?;
    Ok(buffer)
}

/// Extract filename from the end of a URL.
pub fn filename_from_url(url: &str) -> Result<String> {
    let (_, filename) = url.rsplit_once('/').context("Failed to split URL.")?;
    Ok(filename.to_string())
}