feat(domain): add Weekday enum with From<chrono::Weekday>

k-tv-backend/domain/src/value_objects/scheduling.rs

@@ -138,3 +138,55 @@ impl Default for RecyclePolicy {
         }
     }
 }
+
+/// Day of week, used as key in weekly schedule configs.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum Weekday {
+    Monday,
+    Tuesday,
+    Wednesday,
+    Thursday,
+    Friday,
+    Saturday,
+    Sunday,
+}
+
+impl From<chrono::Weekday> for Weekday {
+    fn from(w: chrono::Weekday) -> Self {
+        match w {
+            chrono::Weekday::Mon => Weekday::Monday,
+            chrono::Weekday::Tue => Weekday::Tuesday,
+            chrono::Weekday::Wed => Weekday::Wednesday,
+            chrono::Weekday::Thu => Weekday::Thursday,
+            chrono::Weekday::Fri => Weekday::Friday,
+            chrono::Weekday::Sat => Weekday::Saturday,
+            chrono::Weekday::Sun => Weekday::Sunday,
+        }
+    }
+}
+
+impl Weekday {
+    pub fn all() -> [Weekday; 7] {
+        [
+            Weekday::Monday, Weekday::Tuesday, Weekday::Wednesday,
+            Weekday::Thursday, Weekday::Friday, Weekday::Saturday, Weekday::Sunday,
+        ]
+    }
+}
+
+#[cfg(test)]
+mod weekday_tests {
+    use super::*;
+
+    #[test]
+    fn from_chrono_weekday_roundtrip() {
+        assert_eq!(Weekday::from(chrono::Weekday::Mon), Weekday::Monday);
+        assert_eq!(Weekday::from(chrono::Weekday::Sun), Weekday::Sunday);
+    }
+
+    #[test]
+    fn all_has_seven_days() {
+        assert_eq!(Weekday::all().len(), 7);
+    }
+}