Advanced file sharing

This is a WIP for advanced file sharing, but I won't pursue this for now since using symlinks in the file system works for me, and this is adding a ton of complexity I don't want or need right now.

routes/api/files/delete.tsx

@@ -1,7 +1,7 @@
 import { Handlers } from 'fresh/server.ts';
 
 import { DirectoryFile, FreshContextState } from '/lib/types.ts';
-import { deleteDirectoryOrFile, getFiles } from '/lib/data/files.ts';
+import { deleteDirectoryOrFile, getDirectoryAccess, getFileAccess, getFiles } from '/lib/data/files.ts';
 
 interface Data {}
 
@@ -30,14 +30,30 @@ export const handler: Handlers<Data, FreshContextState> = {
       return new Response('Bad Request', { status: 400 });
     }
 
-    // TODO: Verify user has write access to path/file and get the appropriate ownerUserId
-
-    const deletedFile = await deleteDirectoryOrFile(
+    let { hasWriteAccess, ownerUserId, ownerParentPath } = await getFileAccess(
       context.state.user.id,
       requestBody.parentPath,
       requestBody.name.trim(),
     );
 
+    if (!hasWriteAccess) {
+      const directoryAccessResult = await getDirectoryAccess(context.state.user.id, requestBody.parentPath);
+
+      hasWriteAccess = directoryAccessResult.hasWriteAccess;
+      ownerUserId = directoryAccessResult.ownerUserId;
+      ownerParentPath = directoryAccessResult.ownerParentPath;
+
+      if (!hasWriteAccess) {
+        return new Response('Forbidden', { status: 403 });
+      }
+    }
+
+    const deletedFile = await deleteDirectoryOrFile(
+      ownerUserId,
+      ownerParentPath,
+      requestBody.name.trim(),
+    );
+
     const newFiles = await getFiles(context.state.user.id, requestBody.parentPath);
 
     const responseBody: ResponseBody = { success: deletedFile, newFiles };