SPlit up

server-rs/src/routes/stats.rs

@@ -340,16 +340,14 @@ pub fn compute_crime_by_year(
         let points: Vec<CrimeYearPoint> = years
             .iter()
             .filter_map(|&year| {
-                let denom = fully_covered_rows
-                    + covered_counts.get(&year).copied().unwrap_or(0);
+                let denom = fully_covered_rows + covered_counts.get(&year).copied().unwrap_or(0);
                 if denom == 0 {
                     // No selected postcode has published data for this year.
                     return None;
                 }
                 Some(CrimeYearPoint {
                     year,
-                    count: (sums.get(&year).copied().unwrap_or(0.0) / denom as f64)
-                        as f32,
+                    count: (sums.get(&year).copied().unwrap_or(0.0) / denom as f64) as f32,
                 })
             })
             .collect();
@@ -365,6 +363,19 @@ pub fn compute_crime_by_year(
     out
 }
 
+/// Latest year present anywhere in the by-year crime dataset. The client
+/// compares each selection's last charted year against this to caption
+/// force-level publication gaps (e.g. Greater Manchester ends mid-2019) as
+/// stale data instead of letting old numbers read as current.
+pub fn crime_latest_available_year(crime_by_year: &CrimeByYearData) -> Option<i32> {
+    crime_by_year
+        .years_by_type
+        .iter()
+        .flatten()
+        .copied()
+        .max()
+}
+
 pub fn compute_poi_feature_stats(
     matching_rows: &[usize],
     poi_metrics: &PostcodePoiMetrics,