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path: root/src/micropub.rs
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use soup::prelude::*;
pub use kittybox_util::micropub::{Error as MicropubError, Config, QueryType};

#[derive(Debug)]
pub struct Client {
    micropub: String,
    access_token: String,

    http: soup::Session,
}

#[derive(Debug, thiserror::Error)]
pub enum Error {
    #[error("glib error: {0}")]
    Glib(#[from] glib::Error),
    #[error("json serialization error: {0}")]
    Json(#[from] serde_json::Error),
    #[error("micropub error: {0}")]
    Micropub(#[from] MicropubError),
    #[error("micropub server did not return a location: header")]
    NoLocationHeader
}

impl Client {
    pub fn new(http: soup::Session, uri: glib::Uri, token: String) -> Self {
        Self {
            micropub: uri.to_string(),
            access_token: token,

            http,
        }
    }

    pub async fn config(&self) -> Result<Config, Error> {
        let uri = glib::Uri::parse(&self.micropub, glib::UriFlags::NONE).unwrap();
        let uri = super::util::append_query(
            &uri, [("q".to_string(), "config".to_string())]
        );
        
        let exch = soup::Message::from_uri("GET", &uri);
        let headers = exch.request_headers().expect("SoupMessage with no headers");
        // TODO: create a SoupAuth subclass that allows pasting in a token
        headers.append("Authorization", &format!("Bearer {}", self.access_token));

        let body = self.http.send_and_read_future(&exch, glib::Priority::DEFAULT).await?;

        Ok(serde_json::from_slice(&body)?)
    }

    pub async fn send_post(&self, post: microformats::types::Item) -> Result<glib::Uri, Error> {
        let uri = glib::Uri::parse(&self.micropub, glib::UriFlags::NONE).unwrap();
        let exch = soup::Message::from_uri("POST", &uri);
        let headers = exch.request_headers().expect("SoupMessage with no headers");
        headers.append("Authorization", &format!("Bearer {}", self.access_token));

        exch.set_request_body_from_bytes(Some("application/json"),
            Some(&glib::Bytes::from_owned(serde_json::to_vec(&post).unwrap()))
        );

        let body = self.http.send_and_read_future(&exch, glib::Priority::DEFAULT).await?;

        match exch.status() {
            soup::Status::Created | soup::Status::Accepted => {
                let response_headers = exch.response_headers().expect("Successful SoupMessage with no response headers");
                let location = response_headers.one("Location").ok_or(Error::NoLocationHeader)?;

                Ok(glib::Uri::parse(&location, glib::UriFlags::NONE)?)
            },
            soup::Status::InternalServerError | soup::Status::BadGateway | soup::Status::ServiceUnavailable => {
                todo!("micropub server is down")
            },
            _ => {
                let error = serde_json::from_slice::<MicropubError>(&body)?;

                Err(error.into())
            }
        }
    }
}