Add automatic websocket reconnection

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/lib/alpaca/clock.rs

@@ -0,0 +1,42 @@
+use crate::types::alpaca::api::incoming::clock::Clock;
+use backoff::{future::retry_notify, ExponentialBackoff};
+use governor::DefaultDirectRateLimiter;
+use log::warn;
+use reqwest::{Client, Error};
+use std::time::Duration;
+
+pub async fn get(
+    client: &Client,
+    rate_limiter: &DefaultDirectRateLimiter,
+    backoff: Option<ExponentialBackoff>,
+    api_base: &str,
+) -> Result<Clock, Error> {
+    retry_notify(
+        backoff.unwrap_or_default(),
+        || async {
+            rate_limiter.until_ready().await;
+            client
+                .get(&format!("https://{}.alpaca.markets/v2/clock", api_base))
+                .send()
+                .await?
+                .error_for_status()
+                .map_err(|e| match e.status() {
+                    Some(reqwest::StatusCode::BAD_REQUEST | reqwest::StatusCode::FORBIDDEN) => {
+                        backoff::Error::Permanent(e)
+                    }
+                    _ => e.into(),
+                })?
+                .json::<Clock>()
+                .await
+                .map_err(backoff::Error::Permanent)
+        },
+        |e, duration: Duration| {
+            warn!(
+                "Failed to get clock, will retry in {} seconds: {}.",
+                duration.as_secs(),
+                e
+            );
+        },
+    )
+    .await
+}