checkbox behaviour

src/main.rs

@@ -87,6 +87,7 @@ impl<'conn> PreparedStatements {
         conn.prepare_cached(include_str!("get_food.sql"))?;
         conn.prepare_cached(include_str!("get_foods.sql"))?;
         conn.prepare_cached(include_str!("get_sum.sql"))?;
+        conn.prepare_cached(include_str!("set.sql"))?;
         Ok(PreparedStatements {})
     }
 
@@ -119,6 +120,11 @@ impl<'conn> PreparedStatements {
         conn.prepare_cached(include_str!("get_sum.sql"))
             .expect("cached statement is invalid")
     }
+
+    fn set(conn: &'conn Connection) -> CachedStatement<'conn> {
+        conn.prepare_cached(include_str!("set.sql"))
+            .expect("cached statement is invalid")
+    }
 }
 
 type ConnState = Arc<Mutex<Connection>>;
@@ -153,6 +159,7 @@ async fn main() -> Result<(), std::io::Error> {
         .route("/", get(root))
         .route("/increase/{id}", post(increase))
         .route("/decrease/{id}", post(decrease))
+        .route("/set/{id}/to/{amount}", post(set))
         .layer(
             TraceLayer::new_for_http().make_span_with(|request: &Request<_>| {
                 let matched_path = request
@@ -285,3 +292,27 @@ async fn decrease(
             .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?,
     ))
 }
+
+fn do_set(conn: &Arc<Mutex<Connection>>, id: i32, amount: i32) -> rusqlite::Result<()> {
+    let conn = conn.lock();
+    let mut stmt = PreparedStatements::set(&conn);
+    let new: i32 = stmt.query_one((id, amount), |row| row.get(0))?;
+    debug!(id, new_serving_count = new, "set");
+    Ok(())
+}
+
+async fn set(
+    State(conn): State<Arc<Mutex<Connection>>>,
+    Path((id, amount)): Path<(i32, i32)>,
+) -> Result<Html<String>, StatusCode> {
+    do_set(&conn, id, amount).map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let food = get_food(&conn, id).map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let sum = get_sum(&conn).map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+    let date = get_date();
+    let update = FoodUpdateTemplate { food, sum, date };
+    Ok(Html(
+        update
+            .render()
+            .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?,
+    ))
+}

src/set.sql

@@ -0,0 +1,8 @@
+UPDATE
+    food
+SET
+    actual_servings = MAX(?2, 0)
+WHERE
+    id = ?1
+RETURNING
+    actual_servings