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#![deny(rust_2018_idioms, unused, unused_crate_dependencies, unused_import_braces, unused_qualifications, warnings)]
#![forbid(unsafe_code)]
use {
std::{
collections::BTreeMap,
time::Duration,
},
collect_mac::collect,
itertools::Itertools as _,
lazy_regex::regex_captures,
serde::Deserialize,
url::Url,
};
pub use crate::{
bot::Bot,
handler::RaceHandler,
};
pub mod bot;
pub mod handler;
pub mod model;
const RACETIME_HOST: &str = "racetime.gg";
#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error(transparent)] Custom(#[from] Box<dyn std::error::Error + Send>),
#[error(transparent)] HeaderToStr(#[from] reqwest::header::ToStrError),
#[error(transparent)] InvalidHeaderValue(#[from] http::header::InvalidHeaderValue),
#[error(transparent)] Io(#[from] std::io::Error),
#[error(transparent)] Json(#[from] serde_json::Error),
#[error(transparent)] Task(#[from] tokio::task::JoinError),
#[error(transparent)] UrlParse(#[from] url::ParseError),
#[error("websocket connection closed by the server")]
EndOfStream,
#[error("the startrace location did not match the input category")]
LocationCategory,
#[error("the startrace location header did not have the expected format")]
LocationFormat,
#[error("the startrace response did not include a location header")]
MissingLocationHeader,
#[error("HTTP error{}: {0}", if let Some(url) = .0.url() { format!(" at {url}") } else { String::default() })]
Reqwest(#[from] reqwest::Error),
#[error("server errors:{}", .0.into_iter().map(|msg| format!("\n• {msg}")).format(""))]
Server(Vec<String>),
#[error("WebSocket error: {0}")]
Tungstenite(#[from] tokio_tungstenite::tungstenite::Error),
#[error("expected text message from websocket, but received {0:?}")]
UnexpectedMessageType(tokio_tungstenite::tungstenite::Message),
}
fn http_uri(host: &str, url: &str) -> Result<Url, Error> {
uri("https", host, url)
}
fn uri(proto: &str, host: &str, url: &str) -> Result<Url, Error> {
Ok(format!("{proto}://{host}{url}").parse()?)
}
pub async fn authorize(client_id: &str, client_secret: &str, client: &reqwest::Client) -> Result<(String, Duration), Error> {
authorize_with_host(RACETIME_HOST, client_id, client_secret, client).await
}
pub async fn authorize_with_host(host: &str, client_id: &str, client_secret: &str, client: &reqwest::Client) -> Result<(String, Duration), Error> {
#[derive(Deserialize)]
struct AuthResponse {
access_token: String,
expires_in: Option<u64>,
}
let data = client.post(http_uri(host, "/o/token")?)
.form(&collect![as BTreeMap<_, _>:
"client_id" => client_id,
"client_secret" => client_secret,
"grant_type" => "client_credentials",
])
.send().await?
.error_for_status()?
.json::<AuthResponse>().await?;
Ok((
data.access_token,
Duration::from_secs(data.expires_in.unwrap_or(36000)),
))
}
pub struct StartRace {
pub goal: String,
pub goal_is_custom: bool,
pub team_race: bool,
pub invitational: bool,
pub unlisted: bool,
pub info_user: String,
pub info_bot: String,
pub require_even_teams: bool,
pub start_delay: u8,
pub time_limit: u8,
pub time_limit_auto_complete: bool,
pub streaming_required: Option<bool>,
pub auto_start: bool,
pub allow_comments: bool,
pub hide_comments: bool,
pub allow_prerace_chat: bool,
pub allow_midrace_chat: bool,
pub allow_non_entrant_chat: bool,
pub chat_message_delay: u8,
}
impl StartRace {
pub async fn start(&self, access_token: &str, client: &reqwest::Client, category: &str) -> Result<String, Error> {
self.start_with_host(RACETIME_HOST, access_token, client, category).await
}
pub async fn start_with_host(&self, host: &str, access_token: &str, client: &reqwest::Client, category: &str) -> Result<String, Error> {
fn form_bool(value: bool) -> &'static str { if value { "1" } else { "0" } }
let start_delay = self.start_delay.to_string();
let time_limit = self.time_limit.to_string();
let chat_message_delay = self.chat_message_delay.to_string();
let mut form = collect![as BTreeMap<_, _>:
if self.goal_is_custom { "custom_goal" } else { "goal" } => &*self.goal,
"team_race" => form_bool(self.team_race),
"invitational" => form_bool(self.invitational),
"unlisted" => form_bool(self.unlisted),
"info_user" => &*self.info_user,
"info_bot" => &*self.info_bot,
"require_even_teams" => form_bool(self.require_even_teams),
"start_delay" => &*start_delay,
"time_limit" => &*time_limit,
"time_limit_auto_complete" => form_bool(self.time_limit_auto_complete),
"auto_start" => form_bool(self.auto_start),
"allow_comments" => form_bool(self.allow_comments),
"hide_comments" => form_bool(self.hide_comments),
"allow_prerace_chat" => form_bool(self.allow_prerace_chat),
"allow_midrace_chat" => form_bool(self.allow_midrace_chat),
"allow_non_entrant_chat" => form_bool(self.allow_non_entrant_chat),
"chat_message_delay" => &*chat_message_delay,
];
if let Some(streaming_required) = self.streaming_required {
form.insert("streaming_required", form_bool(streaming_required));
}
let response = client.post(http_uri(host, &format!("/o/{category}/startrace"))?)
.bearer_auth(access_token)
.form(&form)
.send().await?
.error_for_status()?;
let location = response
.headers()
.get("location").ok_or(Error::MissingLocationHeader)?
.to_str()?;
let (_, location_category, slug) = regex_captures!("^/([^/]+)/([^/]+)$", location).ok_or(Error::LocationFormat)?;
if location_category != category { return Err(Error::LocationCategory) }
Ok(slug.to_owned())
}
}