[wip] Change of approach: moving the Multistatus

Move the Multistatus value from the main function into the traverse
function, as it will not be used in the main function afterwards.
In the traverse function, the struct is now borrowed as mutable,
which fixes the append function, but we'll probably need to use
references in all the match arms.

src/main.rs

@@ -126,7 +126,7 @@ async fn get_folder_contents(url_tail: &String) -> Result<String, Box<dyn std::e
 }
 
 #[tokio::main]
-async fn traverse(result: &Multistatus) {
+async fn traverse(mut result: Multistatus) {
     debug!("Entering: traverse()");
     // Initialize the indexed "pointer"
     let mut current_index: usize = 0;
@@ -134,7 +134,7 @@ async fn traverse(result: &Multistatus) {
     // Initialize the hashmap of visited items (by etag?)
     let mut visited_items = HashMap::new();
     // match result.response[0].propstat[0].prop {
-    match result.response.into_iter().nth(0).unwrap()
+    match &result.response.into_iter().nth(0).unwrap()
         .propstat.into_iter().nth(0).unwrap().prop {
         Some(prop) => match prop.get_etag {
             Some(etag) => {
@@ -149,14 +149,12 @@ async fn traverse(result: &Multistatus) {
     while !result.response.is_empty() {
         match &result.response[current_index].propstat[0].prop {
             Some(prop) => {
-                match &prop.get_etag {
+                match prop.get_etag {
                     Some(etag) => {
                         // If result.response[current_index] has not been visited
-                        if !visited_items.contains_key(etag) {
+                        if !visited_items.contains_key(&etag) {
                             // If item is a collection
-                            // TODO(amcooper): Again, replace unwrap with the match implementation,
-                            // or find another way to handle these structures.
-                            match &prop.resource_type {
+                            match prop.resource_type {
                                 Some(resource_type) => {
                                     if !resource_type.collection.is_empty() {
                                         // Get the contents XML
@@ -169,7 +167,7 @@ async fn traverse(result: &Multistatus) {
                                         // Parse the contents XML into Multistatus
                                         let mut new_result: Multistatus = from_str(&String::from(folder_contents)).unwrap();
                                         // Append the NextcloudResponse vector to result.response
-                                        result.response.append(&new_result.response);
+                                        result.response.append(&mut new_result.response);
                                     }
                                 }
                                 _ => current_index += 1,
@@ -228,6 +226,6 @@ async fn main() -> std::io::Result<()> {
     let mut result: Multistatus = from_str(&folder_contents).unwrap();
     println!("{:?}", result);
 
-    traverse(&result);
+    traverse(result);
     Ok(())
 }