Merge pull request #72 from grafbase/web-time-wasm32-unknown-unknown

Enable Web/Wasm compatibility by using `web_time::SystemTime::now()`

Author: dylanhart

Cargo.toml

@@ -24,6 +24,10 @@ uuid = { version = "1.1", optional = true }
 postgres-types = { version = "0.2.6", optional = true }
 bytes = { version = "1.4.0", optional = true }
 
+[target.wasm32-unknown-unknown.dependencies]
+getrandom = { version = "0.2", features = ["js"] }
+web-time = "1"
+
 [dev-dependencies]
 bencher = "0.1"
 serde_derive = "1.0"

src/generator.rs

@@ -42,8 +42,7 @@ impl Generator {
     /// assert!(ulid1 < ulid2);
     /// ```
     pub fn generate(&mut self) -> Result<Ulid, MonotonicError> {
-        let now = SystemTime::now();
-        self.generate_from_datetime(now)
+        self.generate_from_datetime(crate::time_utils::now())
     }
 
     /// Generate a new Ulid matching the given DateTime.
@@ -91,8 +90,7 @@ impl Generator {
     where
         R: rand::Rng + ?Sized,
     {
-        let now = SystemTime::now();
-        self.generate_from_datetime_with_source(now, source)
+        self.generate_from_datetime_with_source(crate::time_utils::now(), source)
     }
 
     /// Generate a new monotonic increasing Ulid with the given source matching the given DateTime

src/lib.rs

@@ -44,6 +44,8 @@ mod postgres;
 pub mod serde;
 #[cfg(feature = "std")]
 mod time;
+#[cfg(feature = "std")]
+mod time_utils;
 #[cfg(feature = "uuid")]
 mod uuid;
 

src/time.rs

@@ -11,7 +11,7 @@ impl Ulid {
     /// let my_ulid = Ulid::new();
     /// ```
     pub fn new() -> Ulid {
-        Ulid::from_datetime(SystemTime::now())
+        Ulid::from_datetime(crate::time_utils::now())
     }
 
     /// Creates a new Ulid using data from the given random number generator
@@ -25,7 +25,7 @@ impl Ulid {
     /// let ulid = Ulid::with_source(&mut rng);
     /// ```
     pub fn with_source<R: rand::Rng>(source: &mut R) -> Ulid {
-        Ulid::from_datetime_with_source(SystemTime::now(), source)
+        Ulid::from_datetime_with_source(crate::time_utils::now(), source)
     }
 
     /// Creates a new Ulid with the given datetime

src/time_utils.rs

@@ -0,0 +1,9 @@
+pub(crate) fn now() -> std::time::SystemTime {
+    #[cfg(target_arch = "wasm32")]
+    {
+        use web_time::web::SystemTimeExt;
+        return web_time::SystemTime::now().to_std();
+    }
+    #[cfg(not(target_arch = "wasm32"))]
+    return std::time::SystemTime::now();
+}