new demo mode & tenure

server-rs/src/data/property/mod.rs

@@ -40,6 +40,16 @@ pub struct HistoricalPrice {
     pub price: i64,
 }
 
+/// A point on the property's tenure timeline: the year a certificate first
+/// recorded a new occupancy `status` ("Owner-occupied" / "Rented (private)" /
+/// "Rented (social)"). Derived per-EPC and reduced to change points by the
+/// pipeline, so this surfaces *when* a home was let out vs lived in.
+#[derive(Serialize, Clone)]
+pub struct TenureEvent {
+    pub year: i32,
+    pub status: String,
+}
+
 pub struct PropertyData {
     pub lat: Vec<f32>,
     pub lon: Vec<f32>,
@@ -100,6 +110,9 @@ pub struct PropertyData {
     /// Per-row historical sale transactions (Land Registry price-paid).
     /// Keyed by (permuted) row index. Only rows with prices are present.
     historical_prices: FxHashMap<u32, Vec<HistoricalPrice>>,
+    /// Per-row tenure timeline (owner-occupied <-> rented change points from
+    /// EPC). Keyed by (permuted) row index. Only rows with changes are present.
+    tenure_history: FxHashMap<u32, Vec<TenureEvent>>,
     property_sub_type: FxHashMap<u32, String>,
     price_qualifier: FxHashMap<u32, String>,
 }
@@ -153,6 +166,14 @@ impl PropertyData {
             .unwrap_or(&[])
     }
 
+    /// Get tenure timeline events for a given row (empty slice if none).
+    pub fn tenure_history(&self, row: usize) -> &[TenureEvent] {
+        self.tenure_history
+            .get(&(row as u32))
+            .map(|v| v.as_slice())
+            .unwrap_or(&[])
+    }
+
     /// Get property sub-type for a given row.
     pub fn property_sub_type(&self, row: usize) -> Option<&str> {
         self.property_sub_type
@@ -231,6 +252,7 @@ impl PropertyData {
             approx_build_date_bits: Vec::new(),
             renovation_history: FxHashMap::default(),
             historical_prices: FxHashMap::default(),
+            tenure_history: FxHashMap::default(),
             property_sub_type: FxHashMap::default(),
             price_qualifier: FxHashMap::default(),
         }