fix: Node polyfill fsAppend rework (#4322)

* My original implementation of `fs.appendFile` used an async API, which, though 
  it would work fine as a polyfill, wasn't an exact match with the Node API.  This PR
  reworks that API to mimic the Node API fully as a synchronous void function with
  an async internal implementation.
* Refactor move of other internal fs `dirent` and `dir` classes to the _fs internal
  directory.

1 files changed, 41 insertions, 0 deletions

diff --git a/std/node/_fs/_fs_dirent.ts b/std/node/_fs/_fs_dirent.ts
new file mode 100644
index 000000000..38cd23d88
--- /dev/null
+++ b/std/node/_fs/_fs_dirent.ts
@@ -0,0 +1,41 @@
+import { notImplemented } from "../_utils.ts";
+
+export default class Dirent {
+  constructor(private entry: Deno.FileInfo) {}
+
+  isBlockDevice(): boolean {
+    return this.entry.blocks != null;
+  }
+
+  isCharacterDevice(): boolean {
+    return this.entry.blocks == null;
+  }
+
+  isDirectory(): boolean {
+    return this.entry.isDirectory();
+  }
+
+  isFIFO(): boolean {
+    notImplemented(
+      "Deno does not yet support identification of FIFO named pipes"
+    );
+    return false;
+  }
+
+  isFile(): boolean {
+    return this.entry.isFile();
+  }
+
+  isSocket(): boolean {
+    notImplemented("Deno does not yet support identification of sockets");
+    return false;
+  }
+
+  isSymbolicLink(): boolean {
+    return this.entry.isSymlink();
+  }
+
+  get name(): string | null {
+    return this.entry.name;
+  }
+}