use std::path::PathBuf;
use tokio::{fs::File, io::AsyncReadExt};
use crate::context::{
document::{Document, IntoDocument},
extract_article, ExtractDocumentError,
};
use super::FsDocumentError;
#[derive(Debug, Clone)]
pub struct HtmlDocument {
path: PathBuf,
}
impl TryFrom<PathBuf> for HtmlDocument {
type Error = FsDocumentError;
fn try_from(path: PathBuf) -> Result<Self, Self::Error> {
if !path.is_file() {
return Err(std::io::Error::from(std::io::ErrorKind::NotFound).into());
}
if path.extension().unwrap() != "html" {
return Err(FsDocumentError::WrongFileType);
}
Ok(Self { path })
}
}
impl IntoDocument for HtmlDocument {
type Error = FsDocumentError<ExtractDocumentError>;
async fn into_document(self) -> Result<Document, Self::Error> {
let file = File::open(self.path).await?;
let mut html = String::new();
tokio::io::BufReader::new(file)
.read_to_string(&mut html)
.await?;
extract_article(&html).map_err(FsDocumentError::Decode)
}
}