brk: first commit

_src/parser/datasets/date_metadata.rs

@@ -0,0 +1,56 @@
+use allocative::Allocative;
+use struct_iterable::Iterable;
+
+use crate::{
+    parser::datasets::AnyDataset,
+    structs::{Config, DateMap, Height, MapKind},
+};
+
+use super::{InsertData, MinInitialStates};
+
+#[derive(Allocative, Iterable)]
+pub struct DateMetadataDataset {
+    min_initial_states: MinInitialStates,
+
+    pub first_height: DateMap<Height>,
+    pub last_height: DateMap<Height>,
+}
+
+impl DateMetadataDataset {
+    pub fn import(config: &Config) -> color_eyre::Result<Self> {
+        let f = |s: &str| config.path_datasets().join(s);
+
+        let mut s = Self {
+            min_initial_states: MinInitialStates::default(),
+
+            // Inserted
+            first_height: DateMap::new_bin(1, MapKind::Inserted, &f("first_height")),
+            last_height: DateMap::new_bin(1, MapKind::Inserted, &f("last_height")),
+        };
+
+        s.min_initial_states
+            .consume(MinInitialStates::compute_from_dataset(&s, config));
+
+        Ok(s)
+    }
+
+    pub fn insert(
+        &mut self,
+        &InsertData {
+            date,
+            date_first_height,
+            height,
+            ..
+        }: &InsertData,
+    ) {
+        self.first_height.insert(date, date_first_height);
+
+        self.last_height.insert(date, height);
+    }
+}
+
+impl AnyDataset for DateMetadataDataset {
+    fn get_min_initial_states(&self) -> &MinInitialStates {
+        &self.min_initial_states
+    }
+}