Add IFC month retrieval

flake.nix

@@ -87,6 +87,11 @@
               buildRustCrateForPkgs = customBuildInfo;
               release = true;
             }).rootCrate.build;
+
+            dashboard = (import ./dashboard/Cargo.nix {
+              inherit pkgs;
+              release = true;
+            }).rootCrate.build;
           };
 
         hydraJobs = {

ifc/src/lib.rs

@@ -89,6 +89,12 @@ impl From<u32> for Month {
     }
 }
 
+impl From<u8> for Month {
+    fn from(val: u8) -> Month {
+        Month::from(val as u32)
+    }
+}
+
 impl From<Month> for String {
     fn from(val: Month) -> String {
         match val {
@@ -153,7 +159,11 @@ impl IFC {
     }
 
     pub fn month_ifc(&self) -> Month {
-        Month::from(self.month())
+        match *self {
+            IFC::Day(Day { month, .. }) => Month::from(month),
+            IFC::LeapDay(_) => Month::June,
+            IFC::YearDay(_) => Month::December,
+        }
     }
 
     pub fn weekday_ifc(&self) -> DayOfWeek {
@@ -477,6 +487,14 @@ mod tests {
         );
     }
 
+    #[test]
+    fn it_expresses_month() {
+        assert_eq!(IFC::ymd(12022, 1, 4).unwrap().month_ifc(), Month::January);
+        assert_eq!(IFC::ymd(12022, 12, 1).unwrap().month_ifc(), Month::November);
+        assert_eq!(IFC::leap_day(12020).unwrap().month_ifc(), Month::June);
+        assert_eq!(IFC::year_day(12020).month_ifc(), Month::December);
+    }
+
     #[test]
     fn it_reports_ordinal_days() {
         assert_eq!(IFC::ymd(12022, 1, 1).unwrap().day_ordinal(), 1);