golgi/src/utils.rs

/*

use kuska_handshake::async_std::BoxStream;
use kuska_sodiumoxide::crypto::sign::ed25519;
use kuska_ssb::discovery;
use kuska_ssb::keystore;
use kuska_ssb::keystore::OwnedIdentity;
*/
use std::fmt::Debug;

use async_std::io::Read;

use kuska_ssb::api::dto::WhoAmIOut;
use serde_json::Value;
use kuska_ssb::feed::{Feed, Message};
use kuska_ssb::rpc::{RecvMsg, RequestNo, RpcReader};

use crate::error::GolgiError;

pub fn getsubset_res_parse(body: &[u8]) -> Result<String, GolgiError> {
    // TODO: cleanup with proper error handling etc.
    Ok(std::str::from_utf8(body).unwrap().to_string())
}

// parses a kvt
pub fn feed_res_parse(body: &[u8]) -> Result<Feed, GolgiError> {
    Ok(Feed::from_slice(body)?)
}

pub fn message_res_parse(body: &[u8]) -> Result<Message, GolgiError> {
    let content = std::str::from_utf8(&body).unwrap().to_string();
    println!("content: {:?}", content);
    let message: Message = serde_json::from_slice(body)?;
    Ok(message)
}

pub fn string_res_parse(body: &[u8]) -> Result<String, GolgiError> {
    // TODO: cleanup with proper error handling etc.
    Ok(std::str::from_utf8(body).unwrap().to_string())
}

pub fn json_res_parse(body: &[u8]) -> Result<Value, GolgiError> {
    let content = std::str::from_utf8(&body).unwrap().to_string();
    println!("content: {:?}", content);
    let message: Value = serde_json::from_slice(body)?;
    Ok(message)
}


//pub fn publish_res_parse(body: &[u8]) -> Result<PublishOut, GolgiError> {
pub fn publish_res_parse(body: &[u8]) -> Result<String, GolgiError> {
    //Ok(serde_json::from_slice(body)?)
    // TODO: cleanup with proper error handling etc.
    Ok(std::str::from_utf8(body).unwrap().to_string())
}

pub fn whoami_res_parse(body: &[u8]) -> Result<WhoAmIOut, GolgiError> {
    Ok(serde_json::from_slice(body)?)
}


/// Takes in an rpc request number, and a handling function,
/// and waits for an rpc response which matches the request number,
/// and then calls the handling function on the response.
///
/// # Arguments
///
/// * `rpc_reader` - A `RpcReader` which can return Messages in a loop
/// * `req_no` - A `RequestNo` of the response to listen for
/// * `f` - A function which takes in an array of u8 and returns a Result<T, GolgiError>.
/// This is a function which parses the response from the RpcReader. T is a generic type,
/// so this parse function can return multiple possible types (String, json, custom struct etc.)
pub async fn get_async<'a, R, T, F>(
    rpc_reader: &mut RpcReader<R>,
    req_no: RequestNo,
    f: F,
) -> Result<T, GolgiError>
where
    R: Read + Unpin,
    F: Fn(&[u8]) -> Result<T, GolgiError>,
    T: Debug,
{
    println!("req_no: {:?}", req_no);
    loop {
        let (id, msg) = rpc_reader.recv().await?;
        println!("id: {:?}", id);
        println!("msg: {:?}", msg);
        if id == req_no {
            match msg {
                RecvMsg::RpcResponse(_type, body) => {
                    let m = std::str::from_utf8(&body).unwrap().to_string();
                    println!("msg: {:?}", m);
                    return f(&body).map_err(|err| err);
                },
                RecvMsg::ErrorResponse(message) => {
                    return Err(GolgiError::Sbot(message));
                },
                RecvMsg::CancelStreamRespose() => {
                    return Err(GolgiError::Sbot("No RPC response from sbot for request".to_string()));
                },
                _ => {
                    println!("empty");
                }
            }
        }
    }
}

/// Takes in an rpc request number, and a handling function,
/// and calls the handling function on all RPC responses which match the request number,
/// appending the result of each parsed message to a vector,
/// until a CancelStreamResponse is found, marking the end of the stream,
/// and then finally a result is returned.
///
/// # Arguments
///
/// * `rpc_reader` - A `RpcReader` which can return Messages in a loop
/// * `req_no` - A `RequestNo` of the response to listen for
/// * `f` - A function which takes in an array of u8 and returns a Result<T, GolgiError>.
/// This is a function which parses the response from the RpcReader. T is a generic type,
/// so this parse function can return multiple possible types (String, json, custom struct etc.)
pub async fn get_async_until_eof<'a, R, T, F>(
    rpc_reader: &mut RpcReader<R>,
    req_no: RequestNo,
    f: F,
) -> Result<Vec<T>, GolgiError>
where
    R: Read + Unpin,
    F: Fn(&[u8]) -> Result<T, GolgiError>,
    T: Debug,
{
    let mut messages: Vec<T> = Vec::new();;
    loop {
        let (id, msg) = rpc_reader.recv().await?;
        if id == req_no {
            match msg {
                RecvMsg::RpcResponse(_type, body) => {
                    let parsed_response: Result<T, GolgiError> = f(&body);
                    match parsed_response {
                        Ok(parsed_message) => {
                            println!("parsed {:?}", parsed_message);
                            messages.push(parsed_message);
                        },
                        Err(err) => {
                            return Err(err);
                        }
                    }
                    let display = f(&body)?;
                    println!("{:?}", display);
                }
                RecvMsg::ErrorResponse(message) => {
                    return Err(GolgiError::Sbot(message));
                }
                RecvMsg::CancelStreamRespose() => break,
                _ => {}
            }
        }
    }
    Ok(messages)
}

pub async fn print_source_until_eof<'a, R, T, F>(
    rpc_reader: &mut RpcReader<R>,
    req_no: RequestNo,
    f: F,
) -> Result<(), GolgiError>
where
    R: Read + Unpin,
    F: Fn(&[u8]) -> Result<T, GolgiError>,
    T: Debug + serde::Deserialize<'a>,
{
    loop {
        let (id, msg) = rpc_reader.recv().await?;
        if id == req_no {
            match msg {
                RecvMsg::RpcResponse(_type, body) => {
                    let display = f(&body)?;
                }
                RecvMsg::ErrorResponse(message) => {
                    return Err(GolgiError::Sbot(message));
                }
                RecvMsg::CancelStreamRespose() => {
                    break
                },
                _ => {}
            }
        }
    }
    Ok(())
}