jlib 0.3.7

A lightweight blockchain lib.
Documentation 
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//Subscribe

use ws::{connect, Handler, Sender, Handshake, Message, CloseCode};

use std::rc::Rc;
use serde_json::{Value};

use crate::message::common::command_trait::CommandConversion; 
use crate::message::subscribe::message::{SubscribeResponse, SubscribeCommand};
use crate::Config;

pub struct Client {
    out: Sender,
    op: Rc<dyn Fn(Result<SubscribeResponse, serde_json::error::Error>)>,
}

impl Handler for Client {
    fn on_open(&mut self, _: Handshake) -> Result<(), ws::Error> {
        // Now we don't need to call unwrap since `on_open` returns a `Result<()>`.
        // If this call fails, it will only result in this connection disconnecting.
        if let Ok(command) = SubscribeCommand::default().to_string() {
            self.out.send(command).unwrap();
        }

        Ok(())
    }

    // `on_message` is roughly equivalent to the Handler closure. It takes a `Message`
    // and returns a `Result<()>`.
    fn on_message(&mut self, msg: Message) -> Result<(), ws::Error> {
        // Close the connection when we get a response from the server
        let resp = msg.into_text().unwrap();
        if let Ok(x) = serde_json::from_str(&resp) as Result<Value, serde_json::error::Error> {
            let result: String = x["result"].to_string();
            if let Ok(x) = serde_json::from_str(&result) as Result<SubscribeResponse, serde_json::error::Error> {
                //to call the function stored in `op`, surround the field access with parentheses
                (self.op)(Ok(x))
            } else if let Ok(x) = serde_json::from_str(&resp) as Result<SubscribeResponse, serde_json::error::Error> {
                (self.op)(Ok(x))
            }
        }

        Ok(())
    }

    fn on_close(&mut self, code: CloseCode, reason: &str) {
        match code {
            CloseCode::Normal => println!("The client is done with the connection."),
            CloseCode::Away   => println!("The client is leaving the site."),
            _ => println!("The client encountered an error: {}", reason),
        }
    }
}

pub trait SubscribeI {
    fn with_config<F>(&self, config: Config, op: F)
    where F: 'static + Fn(Result<SubscribeResponse, serde_json::error::Error>);
}

pub struct Subscribe {}
impl Subscribe {
    pub fn new() -> Self {
        Subscribe {
        }
    }
}

impl SubscribeI for Subscribe {
    fn with_config<F>(&self, config: Config, op: F)
    where F: 'static + Fn(Result<SubscribeResponse, serde_json::error::Error>) {

        let op_rc = Rc::new(op);

        connect(config.addr, |out| {

            let op = op_rc.clone();

            Client {
                out: out,
                op: op,
            }

        }).unwrap();
    }
}