First repo code

src/data/repositories.rs

@@ -0,0 +1,46 @@
+use crate::data::Id;
+use crate::data::entities::{Entity, EntityInner, Repository, WordData};
+use crate::notification::MaybeError;
+use parking_lot::{Mutex, RwLock};
+use rusqlite::Connection;
+use std::marker::PhantomData;
+use std::sync::Arc;
+
+#[derive(Clone)]
+pub struct WordRepository {
+    inner: Arc<RwLock<WordRepositoryInner>>,
+}
+
+pub struct WordRepositoryInner {
+    cache: Vec<WordData>,
+    temporal: Vec<Entity<WordData, WordRepository>>,
+    next_temporal: u32,
+    connection: Arc<Mutex<Connection>>,
+}
+
+impl Repository<WordData> for WordRepository {
+    fn get(&self, id: Id) -> Option<WordData> {
+        let inner = self.inner.read();
+        Some(inner.cache[inner.cache.binary_search_by(|w| w.id.cmp(&id)).ok()?].clone())
+    }
+
+    fn create(&mut self, new: WordData) -> Entity<WordData, WordRepository> {
+        let mut inner = self.inner.write();
+        let next_temporal = inner.next_temporal;
+        inner.next_temporal += 1;
+        drop(inner);
+        let entity = Entity {
+            inner: EntityInner {
+                id: next_temporal.into(),
+                real: false,
+            },
+            repo: self.clone(),
+            _phantom: PhantomData,
+        };
+        entity
+    }
+
+    fn save(&mut self, entity: EntityInner) -> MaybeError {
+        todo!()
+    }
+}