Create file metadata endpoint

This allows retrieving create/modify date as well as file size for any
file in the BASE_PATH.

src/files.rs

@@ -5,7 +5,7 @@ use std::path::{Path, PathBuf};
 
 use path_absolutize::*;
 
-pub fn list_files(dir: PathBuf) -> io::Result<Vec<PathBuf>> {
+pub fn list_files(dir: &Path) -> io::Result<Vec<PathBuf>> {
     let files = read_dir(dir)?
         .map(|res| res.unwrap())
         .filter(|entry| is_image_or_video(&entry.path()) || entry.file_type().unwrap().is_dir())
@@ -151,6 +151,13 @@ mod tests {
         assert!(is_image_or_video(Path::new("image.MoV")));
     }
 
+    #[test]
+    fn nef_valid_extension_test() {
+        assert!(is_image_or_video(Path::new("image.nef")));
+        assert!(is_image_or_video(Path::new("image.NEF")));
+        assert!(is_image_or_video(Path::new("image.NeF")));
+    }
+
     #[test]
     fn hidden_file_not_valid_test() {
         assert!(!is_image_or_video(Path::new(".DS_store")));