wip: add func to get path type

this is because we can't access file metadata in the sim :(

Author: pepperoni505

Sources/Code/WASM/navdata_updater/src/lib.rs

@@ -1,5 +1,6 @@
 mod dispatcher;
 mod download;
+mod util;
 
 #[msfs::gauge(name=navdata_updater)]
 async fn navdata_updater(mut gauge: msfs::Gauge) -> Result<(), Box<dyn std::error::Error>> {

Sources/Code/WASM/navdata_updater/src/util.rs

@@ -0,0 +1,23 @@
+use std::fs;
+use std::io;
+use std::path::Path;
+
+#[derive(PartialEq, Eq)]
+pub enum PathType {
+    File,
+    Directory,
+    DoesNotExist,
+}
+
+/// We aren't able to get file metadata in the sim so we can't use some of the standard library file system functions (like is_dir, exists, and some others)
+pub fn get_path_type(path: &Path) -> PathType {
+    let file_res = fs::File::open(path);
+    if file_res.is_ok() {
+        return PathType::File;
+    }
+    let dir_res = fs::read_dir(path);
+    if dir_res.is_ok() {
+        return PathType::Directory;
+    }
+    PathType::DoesNotExist
+}