1 files changed, 93 insertions, 0 deletions
diff --git a/intl/icu_capi/src/week.rs b/intl/icu_capi/src/week.rs
new file mode 100644
index 0000000000..f82b5aca07
--- /dev/null
+++ b/intl/icu_capi/src/week.rs
@@ -0,0 +1,93 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+use icu_calendar::week::WeekOf;
+
+#[diplomat::bridge]
+pub mod ffi {
+    use crate::date::ffi::ICU4XIsoWeekday;
+    use crate::errors::ffi::ICU4XError;
+    use crate::locale::ffi::ICU4XLocale;
+    use crate::provider::ffi::ICU4XDataProvider;
+    use alloc::boxed::Box;
+    use icu_calendar::week::{RelativeUnit, WeekCalculator};
+
+    #[diplomat::rust_link(icu::calendar::week::RelativeUnit, Enum)]
+    #[diplomat::enum_convert(RelativeUnit)]
+    pub enum ICU4XWeekRelativeUnit {
+        Previous,
+        Current,
+        Next,
+    }
+
+    #[diplomat::rust_link(icu::calendar::week::WeekOf, Struct)]
+    pub struct ICU4XWeekOf {
+        pub week: u16,
+        pub unit: ICU4XWeekRelativeUnit,
+    }
+    /// A Week calculator, useful to be passed in to `week_of_year()` on Date and DateTime types
+    #[diplomat::opaque]
+    #[diplomat::rust_link(icu::calendar::week::WeekCalculator, Struct)]
+    pub struct ICU4XWeekCalculator(pub WeekCalculator);
+
+    impl ICU4XWeekCalculator {
+        /// Creates a new [`ICU4XWeekCalculator`] from locale data.
+        #[diplomat::rust_link(icu::calendar::week::WeekCalculator::try_new, FnInStruct)]
+        pub fn create(
+            provider: &ICU4XDataProvider,
+            locale: &ICU4XLocale,
+        ) -> Result<Box<ICU4XWeekCalculator>, ICU4XError> {
+            let locale = locale.to_datalocale();
+
+            Ok(Box::new(ICU4XWeekCalculator(call_constructor!(
+                WeekCalculator::try_new,
+                WeekCalculator::try_new_with_any_provider,
+                WeekCalculator::try_new_with_buffer_provider,
+                provider,
+                &locale,
+            )?)))
+        }
+
+        #[diplomat::rust_link(
+            icu::calendar::week::WeekCalculator::first_weekday,
+            StructField,
+            compact
+        )]
+        #[diplomat::rust_link(
+            icu::calendar::week::WeekCalculator::min_week_days,
+            StructField,
+            compact
+        )]
+        pub fn create_from_first_day_of_week_and_min_week_days(
+            first_weekday: ICU4XIsoWeekday,
+            min_week_days: u8,
+        ) -> Box<ICU4XWeekCalculator> {
+            let mut calculator = WeekCalculator::default();
+            calculator.first_weekday = first_weekday.into();
+            calculator.min_week_days = min_week_days;
+            Box::new(ICU4XWeekCalculator(calculator))
+        }
+
+        /// Returns the weekday that starts the week for this object's locale
+        #[diplomat::rust_link(icu::calendar::week::WeekCalculator::first_weekday, StructField)]
+        pub fn first_weekday(&self) -> ICU4XIsoWeekday {
+            self.0.first_weekday.into()
+        }
+        /// The minimum number of days overlapping a year required for a week to be
+        /// considered part of that year
+        #[diplomat::rust_link(icu::calendar::week::WeekCalculator::min_week_days, StructField)]
+        pub fn min_week_days(&self) -> u8 {
+            self.0.min_week_days
+        }
+    }
+}
+
+impl From<WeekOf> for ffi::ICU4XWeekOf {
+    fn from(other: WeekOf) -> Self {
+        ffi::ICU4XWeekOf {
+            week: other.week,
+            unit: other.unit.into(),
+        }
+    }
+}