Move api routes to /api and add /api/sessions

src/database/util/category.rs

@@ -0,0 +1,25 @@
+use crate::database::latest::trees::categories;
+use crate::status_json::StatusJson;
+use bincode::{deserialize, serialize};
+use std::collections::HashMap;
+
+pub fn get_category(
+    tree: &sled::Tree,
+    key: &categories::K,
+) -> Result<Option<categories::V>, StatusJson> {
+    Ok(match tree.get(serialize(key)?)? {
+        Some(raw) => Some(deserialize(&raw)?),
+        None => None,
+    })
+}
+
+pub fn get_all_categories(
+    tree: &sled::Tree,
+) -> Result<HashMap<categories::K, categories::V>, StatusJson> {
+    Ok(tree
+        .iter()
+        .map(|result| {
+            result.map(|(k, v)| deserialize(&k).and_then(|k| deserialize(&v).map(|v| (k, v))))
+        })
+        .collect::<Result<Result<_, _>, _>>()??)
+}