Simplify down to show-days

src/cli/sort_by.rs

@@ -0,0 +1,16 @@
+use clap::ValueEnum;
+
+#[derive(Debug, ValueEnum, Clone)]
+pub enum SortBy {
+    Currency,
+    Rate,
+}
+
+impl SortBy {
+    pub fn get_comparer(&self) -> fn(&(&str, f64), &(&str, f64)) -> std::cmp::Ordering {
+        match self {
+            Self::Currency => |a, b| a.0.cmp(&b.0),
+            Self::Rate => |a, b| a.1.total_cmp(&b.1),
+        }
+    }
+}