Add timezone.

Author: cdmurph32

cap-primitives/Cargo.toml

@@ -20,6 +20,7 @@ maybe-owned = "0.3.4"
 fs-set-times = "0.20.0"
 io-extras = "0.18.0"
 io-lifetimes = { version = "2.0.0", default-features = false }
+iana-time-zone = "0.1.57"
 
 [dev-dependencies]
 cap-tempfile = { path = "../cap-tempfile" }

cap-primitives/src/time/mod.rs

@@ -4,10 +4,12 @@ mod instant;
 mod monotonic_clock;
 mod system_clock;
 mod system_time;
+mod timezone;
 
 pub use instant::Instant;
 pub use monotonic_clock::MonotonicClock;
 pub use system_clock::SystemClock;
 pub use system_time::SystemTime;
+pub use timezone::Timezone;
 
 pub use std::time::{Duration, SystemTimeError};

cap-primitives/src/time/timezone.rs

@@ -0,0 +1,30 @@
+use ambient_authority::AmbientAuthority;
+use iana_time_zone::get_timezone;
+
+/// A reference to a timezone resource.
+pub struct Timezone(());
+
+#[derive(Debug)]
+pub struct TimezoneError(String);
+
+//impl LocalResult for TimezoneError {
+impl Timezone {
+    /// Constructs a new instance of `Self`.
+    ///
+    /// # Ambient Authority
+    ///
+    /// This uses ambient authority to accesses clocks.
+    #[inline]
+    pub const fn new(ambient_authority: AmbientAuthority) -> Self {
+        let _ = ambient_authority;
+        Self(())
+    }
+
+    /// Returns the combined date and time with timezone.
+    ///
+    /// Converts NaiveTime to DateTime
+    #[inline]
+    pub fn timezone_name(&self) -> Result<String, TimezoneError> {
+        get_timezone().map_err(|e| TimezoneError(e.to_string()))
+    }
+}