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use rsb_derive::Builder; use crate::api::*; use crate::errors::*; use crate::{SlackClient, SlackClientHttpApi}; use crate::listener::{ErrorHandler, SlackClientEventsListener}; use futures::future::{BoxFuture, FutureExt}; use hyper::body::*; use hyper::{Method, Request, Response}; use log::*; use std::future::Future; use std::sync::Arc; #[derive(Debug, PartialEq, Clone, Builder)] pub struct SlackOAuthListenerConfig { pub client_id: String, pub client_secret: String, pub bot_scope: String, pub redirect_callback_host: String, #[default = "SlackOAuthListenerConfig::DEFAULT_INSTALL_PATH_VALUE.into()"] pub install_path: String, #[default = "SlackOAuthListenerConfig::DEFAULT_CALLBACK_PATH_VALUE.into()"] pub redirect_callback_path: String, #[default = "SlackOAuthListenerConfig::DEFAULT_INSTALLED_URL_VALUE.into()"] pub redirect_installed_url: String, #[default = "SlackOAuthListenerConfig::DEFAULT_CANCELLED_URL_VALUE.into()"] pub redirect_cancelled_url: String, #[default = "SlackOAuthListenerConfig::DEFAULT_ERROR_URL_VALUE.into()"] pub redirect_error_redirect_url: String, } impl SlackOAuthListenerConfig { const DEFAULT_INSTALL_PATH_VALUE: &'static str = "/auth/install"; const DEFAULT_CALLBACK_PATH_VALUE: &'static str = "/auth/callback"; const DEFAULT_INSTALLED_URL_VALUE: &'static str = "/installed"; const DEFAULT_CANCELLED_URL_VALUE: &'static str = "/cancelled"; const DEFAULT_ERROR_URL_VALUE: &'static str = "/error"; const OAUTH_AUTHORIZE_URL_VALUE: &'static str = "https://slack.com/oauth/v2/authorize"; pub fn to_redirect_url(&self) -> String { format!( "{}{}", &self.redirect_callback_host, &self.redirect_callback_path ) } } impl SlackClientEventsListener { async fn slack_oauth_install_service( _: Request<Body>, config: &SlackOAuthListenerConfig, ) -> Result<Response<Body>, Box<dyn std::error::Error + Send + Sync>> { let full_uri = SlackClientHttpApi::create_url_with_params( SlackOAuthListenerConfig::OAUTH_AUTHORIZE_URL_VALUE, &vec![ ("client_id", Some(&config.client_id)), ("scope", Some(&config.bot_scope)), ("redirect_uri", Some(&config.to_redirect_url())), ], ); debug!("Redirecting to Slack OAuth authorize: {}", &full_uri); SlackClientHttpApi::hyper_redirect_to(&full_uri.to_string()) } async fn slack_oauth_callback_service<'a, I, IF>( req: Request<Body>, config: &'a SlackOAuthListenerConfig, client: Arc<SlackClient>, install_service_fn: I, error_handler: ErrorHandler, ) -> Result<Response<Body>, Box<dyn std::error::Error + Send + Sync>> where I: Fn(SlackOAuthV2AccessTokenResponse, Arc<SlackClient>) -> IF + 'static + Send + Sync + Clone, IF: Future<Output = ()> + 'static + Send, { let params = SlackClientHttpApi::parse_query_params(&req); debug!("Received Slack OAuth callback: {:?}", ¶ms); match (params.get("code"), params.get("error")) { (Some(code), None) => { let oauth_access_resp = client .oauth2_access( &SlackOAuthV2AccessTokenRequest::from(SlackOAuthV2AccessTokenRequestInit { client_id: config.client_id.clone(), client_secret: config.client_secret.clone(), code: code.into(), }) .with_redirect_uri(config.to_redirect_url()), ) .await; match oauth_access_resp { Ok(oauth_resp) => { info!( "Received slack OAuth access resp for: {} / {} / {}", &oauth_resp.team.id, &oauth_resp .team .name .as_ref() .cloned() .unwrap_or_else(|| "".into()), &oauth_resp.authed_user.id ); install_service_fn(oauth_resp, client).await; SlackClientHttpApi::hyper_redirect_to(&config.redirect_installed_url) } Err(err) => { error!("Slack OAuth error: {}", &err); error_handler(err, client); SlackClientHttpApi::hyper_redirect_to(&config.redirect_error_redirect_url) } } } (None, Some(err)) => { info!("Slack OAuth cancelled with the reason: {}", err); error_handler( Box::new(SlackClientError::ApiError(SlackClientApiError::new( err.clone(), ))), client, ); let redirect_error_url = format!( "{}{}", &config.redirect_error_redirect_url, req.uri().query().map_or("".into(), |q| format!("?{}", &q)) ); SlackClientHttpApi::hyper_redirect_to(&redirect_error_url) } _ => { error!("Slack OAuth cancelled with unknown reason"); error_handler( Box::new(SlackClientError::SystemError(SlackClientSystemError::new( "OAuth cancelled with unknown reason".into(), ))), client, ); SlackClientHttpApi::hyper_redirect_to(&config.redirect_error_redirect_url) } } } pub fn oauth_service_fn<'a, D, F, I, IF>( &self, config: Arc<SlackOAuthListenerConfig>, install_service_fn: I, ) -> impl Fn( Request<Body>, D, ) -> BoxFuture< 'a, Result<Response<Body>, Box<dyn std::error::Error + Send + Sync + 'a>>, > + 'a + Send + Clone where D: Fn(Request<Body>) -> F + 'a + Send + Sync + Clone, F: Future<Output = Result<Response<Body>, Box<dyn std::error::Error + Send + Sync + 'a>>> + 'a + Send, I: Fn(SlackOAuthV2AccessTokenResponse, Arc<SlackClient>) -> IF + 'static + Send + Sync + Clone, IF: Future<Output = ()> + 'static + Send, { let client = self.client.clone(); let listener_error_handler = self.error_handler.clone(); move |req: Request<Body>, chain: D| { let cfg = config.clone(); let install_fn = install_service_fn.clone(); let sc = client.clone(); let error_handler = listener_error_handler.clone(); async move { match (req.method(), req.uri().path()) { (&Method::GET, url) if url == cfg.install_path => { Self::slack_oauth_install_service(req, &cfg).await } (&Method::GET, url) if url == cfg.redirect_callback_path => { Self::slack_oauth_callback_service(req, &cfg, sc, install_fn, error_handler) .await } _ => chain(req).await, } } .boxed() } } }