feat: replace chrono with time

Cargo.toml

@@ -59,10 +59,10 @@ serde_json = "1.0.68"
 serde_plain = "1.0.0"
 surf = { version = "2.3.1", optional = true }
 
-[dependencies.chrono]
+[dependencies.time]
 default-features = false
-features = ["clock", "serde"]
-version = "0.4.19"
+features = ["std", "serde"]
+version = "0.3.30"
 
 [dependencies.reqwest]
 default-features = false

src/api.rs

@@ -3,7 +3,6 @@
 use std::collections::HashMap;
 use std::default::Default;
 
-use chrono::Utc;
 use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize, Debug)]
@@ -29,7 +28,7 @@ pub struct Feature {
     pub strategies: Vec<Strategy>,
     pub variants: Option<Vec<Variant>>,
     #[serde(rename = "createdAt")]
-    pub created_at: Option<chrono::DateTime<chrono::Utc>>,
+    pub created_at: Option<time::OffsetDateTime>,
 }
 
 #[derive(Clone, Default, Serialize, Deserialize, Debug)]
@@ -85,7 +84,7 @@ pub struct Registration {
     #[serde(rename = "sdkVersion")]
     pub sdk_version: String,
     pub strategies: Vec<String>,
-    pub started: chrono::DateTime<chrono::Utc>,
+    pub started: time::OffsetDateTime,
     pub interval: u64,
 }
 
@@ -102,7 +101,7 @@ impl Default for Registration {
             instance_id: "".into(),
             sdk_version: "unleash-client-rust-0.1.0".into(),
             strategies: vec![],
-            started: Utc::now(),
+            started: time::OffsetDateTime::now_utc(),
             interval: 15 * 1000,
         }
     }
@@ -132,8 +131,8 @@ pub struct ToggleMetrics {
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct MetricsBucket {
-    pub start: chrono::DateTime<chrono::Utc>,
-    pub stop: chrono::DateTime<chrono::Utc>,
+    pub start: time::OffsetDateTime,
+    pub stop: time::OffsetDateTime,
     pub toggles: HashMap<String, ToggleMetrics>,
 }
 

src/client.rs

@@ -8,7 +8,6 @@ use std::sync::{Arc, Mutex};
 use std::time::Duration;
 
 use arc_swap::ArcSwapOption;
-use chrono::Utc;
 use enum_map::{EnumArray, EnumMap};
 use futures_timer::Delay;
 use log::{debug, trace, warn};
@@ -202,7 +201,7 @@ pub struct CachedState<F>
 where
     F: EnumArray<CachedFeature>,
 {
-    start: chrono::DateTime<chrono::Utc>,
+    start: time::OffsetDateTime,
     // user supplies F defining the features they need
     // The default value of F is defined as 'fallback to string lookups'.
     features: EnumMap<F, CachedFeature>,
@@ -668,7 +667,7 @@ where
         &self,
         features: Vec<Feature>,
     ) -> Result<Option<Metrics>, Box<dyn std::error::Error + Send + Sync>> {
-        let now = Utc::now();
+        let now = time::OffsetDateTime::now_utc();
         trace!("memoize: start with {} features", features.len());
         let source_strategies = self.strategies.lock().unwrap();
         let mut unenumerated_features: HashMap<String, CachedFeature> = HashMap::new();