feat: Add as_file and is_file to PrivateNode (wasm) (#136)

wnfs-wasm/src/fs/private/file.rs

@@ -20,7 +20,7 @@ use wnfs::{Id, PrivateFile as WnfsPrivateFile};
 
 /// A file in a WNFS public file system.
 #[wasm_bindgen]
-pub struct PrivateFile(Rc<WnfsPrivateFile>);
+pub struct PrivateFile(pub(crate) Rc<WnfsPrivateFile>);
 
 //--------------------------------------------------------------------------------------------------
 // Implementations

wnfs-wasm/src/fs/private/node.rs

@@ -2,7 +2,7 @@ use js_sys::Error;
 use wasm_bindgen::prelude::wasm_bindgen;
 use wnfs::{private::PrivateNode as WnfsPrivateNode, Id};
 
-use crate::fs::{JsResult, PrivateDirectory};
+use crate::fs::{JsResult, PrivateDirectory, PrivateFile};
 
 //--------------------------------------------------------------------------------------------------
 // Type Definitions
@@ -28,11 +28,26 @@ impl PrivateNode {
         Ok(PrivateDirectory(dir))
     }
 
+    #[wasm_bindgen(js_name = "asFile")]
+    pub fn as_file(&self) -> JsResult<PrivateFile> {
+        let file = self
+            .0
+            .as_file()
+            .map_err(|e| Error::new(&format!("Cannot cast to a file: {e}")))?;
+
+        Ok(PrivateFile(file))
+    }
+
     #[wasm_bindgen(js_name = "isDir")]
     pub fn is_dir(&self) -> bool {
         self.0.is_dir()
     }
 
+    #[wasm_bindgen(js_name = "isFile")]
+    pub fn is_file(&self) -> bool {
+        self.0.is_file()
+    }
+
     #[wasm_bindgen(js_name = "getId")]
     pub fn get_id(&self) -> String {
         self.0.get_id()