update

src/routes/item/mod.rs

@@ -55,3 +55,24 @@ pub async fn transaction_route(transaction: &str) -> FallibleApiResponse {
         .ok_or_else(|| api_error("No transaction with this UUID"))?;
     Ok(t.api_json())
 }
+
+/// Returns unique values for a field
+#[get("/item/<item_id>/<variant_id>/unique?<field>")]
+pub async fn unique_field_route(
+    item_id: &str,
+    variant_id: &str,
+    field: &str,
+    itemdb: &State<ItemDB>,
+) -> FallibleApiResponse {
+    let variant = itemdb
+        .get_item(item_id)
+        .ok_or_else(item_does_not_exist_error)?
+        .variant(variant_id)
+        .ok_or_else(variant_does_not_exist_error)?;
+
+    match field {
+        "origin" => Ok(json!(variant.get_unique_origins().await)),
+        "destination" => Ok(json!(variant.get_unique_destinations().await)),
+        _ => Err(api_error("Unknown field")),
+    }
+}