feat: setup riven for wasm (nodejs) execution (#63)

+ use custom `Notify`
+ use different version of async sleep (tokio vs gloo-timers)
+ switch futures utils from `tokio` to `futures`

riven/Cargo.toml

@@ -11,10 +11,8 @@ include = [ "src/**", "../README.md" ]
 keywords = [ "riot-games", "riot", "league", "league-of-legends" ]
 categories = [ "api-bindings", "web-programming::http-client" ]
 
-#[badges]
-#travis-ci = { repository = "MingweiSamuel/Riven" }
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+crate-type = ["cdylib", "rlib"]
 
 [package.metadata.docs.rs]
 features = [ "nightly" ]
@@ -39,6 +37,7 @@ deny-unknown-enum-variants-strings = []
 deny-unknown-enum-variants-integers = []
 
 [dependencies]
+futures = "0.3"
 log = "0.4"
 num_enum = "0.5"
 parking_lot = "0.12"
@@ -49,13 +48,18 @@ serde_json = "1.0"
 serde_repr = "0.1"
 strum = "0.20"
 strum_macros = "0.20"
-tokio = { version = "1", default-features = false, features = [ "macros", "parking_lot", "sync", "time" ] }
 tracing = { version = "0.1", optional = true }
 
+[target.'cfg(not(target_family = "wasm"))'.dependencies]
+tokio = { version = "1", default-features = false, features = [ "time" ] }
+
+[target.'cfg(target_family = "wasm")'.dependencies]
+gloo-timers = { version = "0.3", features = [ "futures" ] }
+web-time = "1.0.0"
+
 [dev-dependencies]
 env_logger = "0.10.0"
 fake_instant = "0.5.0"
-futures = "0.3"
 hyper = { version = "0.14", features = [ "server" ] }
 tokio = { version = "1", features = [ "full" ] }
 tokio-shared-rt = "0.1"

riven/src/config.rs

@@ -1,9 +1,9 @@
 //! Configuration of RiotApi.
-use std::time::Duration;
-
 use reqwest::header::{HeaderMap, HeaderValue};
 use reqwest::ClientBuilder;
 
+use crate::time::Duration;
+
 /// Configuration for instantiating RiotApi.
 #[derive(Debug)]
 pub struct RiotApiConfig {

riven/src/lib.rs

@@ -204,3 +204,17 @@ mod riot_api;
 pub use riot_api::*;
 
 mod util;
+
+/// Wasm compatibility layer for [`std::time`] or [`web_time`].
+#[rustfmt::skip]
+pub mod time {
+    #[cfg(not(target_family = "wasm"))]
+    pub use std::time::*;
+    #[cfg(target_family = "wasm")]
+    pub use web_time::*;
+
+    #[cfg(not(target_family = "wasm"))]
+    pub use tokio::time::sleep;
+    #[cfg(target_family = "wasm")]
+    pub use gloo_timers::future::sleep;
+}

riven/src/req/mod.rs

@@ -4,9 +4,9 @@ mod rate_limit;
 pub use rate_limit::*;
 
 mod rate_limit_type;
-use std::time::Instant;
-
 pub use rate_limit_type::*; // Hack for token_bucket_test.rs.
+
+use crate::time::Instant;
 mod token_bucket;
 pub use token_bucket::*;
 

riven/src/req/rate_limit.rs

@@ -1,14 +1,15 @@
 use std::cmp;
-use std::time::{Duration, Instant};
 
+use futures::FutureExt;
 use parking_lot::{RwLock, RwLockUpgradableReadGuard};
 use reqwest::{Response, StatusCode};
 use scan_fmt::scan_fmt;
-use tokio::sync::Notify;
 #[cfg(feature = "tracing")]
 use tracing as log;
 
 use super::{RateLimitType, TokenBucket, VectorTokenBucket};
+use crate::time::{sleep, Duration, Instant};
+use crate::util::Notify;
 use crate::RiotApiConfig;
 
 pub struct RateLimit {
@@ -51,11 +52,10 @@ impl RateLimit {
 
     pub async fn acquire_both(app_rate_limit: &Self, method_rate_limit: &Self) {
         while let Some(delay) = Self::acquire_both_or_duration(app_rate_limit, method_rate_limit) {
-            tokio::select! {
-                biased;
-                _ = tokio::time::sleep(delay) => { continue }
-                _ = app_rate_limit.update_notify.notified() => {}
-                _ = method_rate_limit.update_notify.notified() => {}
+            futures::select_biased! {
+                _ = sleep(delay).fuse() => continue,
+                _ = method_rate_limit.update_notify.notified().fuse() => {}
+                _ = app_rate_limit.update_notify.notified().fuse() => {}
             };
             log::trace!("Task awoken due to rate limit update.");
         }

riven/src/req/regional_requester.rs

@@ -3,11 +3,10 @@ use std::sync::Arc;
 
 use reqwest::{RequestBuilder, StatusCode};
 #[cfg(feature = "tracing")]
-use tracing as log;
-#[cfg(feature = "tracing")]
-use tracing::Instrument;
+use tracing::{self as log, Instrument};
 
 use super::{RateLimit, RateLimitType};
+use crate::time::{sleep, Duration};
 use crate::util::InsertOnlyCHashMap;
 use crate::{ResponseInfo, Result, RiotApiConfig, RiotApiError};
 
@@ -113,9 +112,9 @@ impl RegionalRequester {
                 // 1 sec, 2 sec, 4 sec, 8 sec.
                 match retry_after {
                     None => {
-                        let delay = std::time::Duration::from_secs(2_u64.pow(retries as u32));
+                        let delay = Duration::from_secs(2_u64.pow(retries as u32));
                         log::debug!("Response {} (retried {} times), NO `retry-after`, using exponential backoff, retrying after {:?}.", status, retries, delay);
-                        let backoff = tokio::time::sleep(delay);
+                        let backoff = sleep(delay);
                         #[cfg(feature = "tracing")]
                         let backoff = backoff.instrument(tracing::info_span!("backoff"));
                         backoff.await;

riven/src/req/token_bucket.rs

@@ -1,10 +1,10 @@
 use std::collections::VecDeque;
 use std::fmt;
-use std::time::Duration;
 
 use parking_lot::{Mutex, MutexGuard};
 
 use super::Instant; // Hack for token_bucket_test.rs.
+use crate::time::Duration;
 
 /// A `TokenBucket` keeps track of number of requests allowed per duration of
 /// time.

riven/src/util/mod.rs

@@ -1,3 +1,5 @@
 mod insert_only_chashmap;
+pub use insert_only_chashmap::InsertOnlyCHashMap;
 
-pub use insert_only_chashmap::*;
+mod notify;
+pub use notify::Notify;

riven/src/util/notify.rs

@@ -0,0 +1,43 @@
+use std::future::Future;
+use std::pin::Pin;
+use std::task::{Context, Poll, Waker};
+
+use parking_lot::Mutex;
+
+#[derive(Default)]
+pub struct Notify {
+    waiters: Mutex<Vec<Waker>>,
+}
+impl Notify {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn notified(&self) -> impl '_ + Future<Output = ()> {
+        struct Notified<'a> {
+            notify: &'a Notify,
+            registered: bool,
+        }
+        impl Future for Notified<'_> {
+            type Output = ();
+
+            fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+                if std::mem::replace(&mut self.as_mut().registered, true) {
+                    Poll::Ready(())
+                } else {
+                    self.notify.waiters.lock().push(cx.waker().clone());
+                    Poll::Pending
+                }
+            }
+        }
+
+        Notified {
+            notify: self,
+            registered: false,
+        }
+    }
+
+    pub fn notify_waiters(&self) {
+        self.waiters.lock().drain(..).for_each(Waker::wake);
+    }
+}

riven/srcgen/lib.rs.dt

@@ -39,3 +39,17 @@ mod riot_api;
 pub use riot_api::*;
 
 mod util;
+
+/// Wasm compatibility layer for [`std::time`] or [`web_time`].
+#[rustfmt::skip]
+pub mod time {
+    #[cfg(not(target_family = "wasm"))]
+    pub use std::time::*;
+    #[cfg(target_family = "wasm")]
+    pub use web_time::*;
+
+    #[cfg(not(target_family = "wasm"))]
+    pub use tokio::time::sleep;
+    #[cfg(target_family = "wasm")]
+    pub use gloo_timers::future::sleep;
+}