dev(puterfs): move get_recursive_size to extension

extensions/puterfs/PuterFSProvider.js

@@ -112,6 +112,7 @@ export default class PuterFSProvider {
             capabilities.READDIR_UUID_MODE,
 
             capabilities.COPY_TREE,
+            capabilities.GET_RECURSIVE_SIZE,
 
             capabilities.READ,
             capabilities.WRITE,
@@ -777,6 +778,27 @@ export default class PuterFSProvider {
         return node;
     }
 
+    async get_recursive_size ({ node }) {
+        const uuid = await node.get('uid');
+        const cte_query = `
+            WITH RECURSIVE descendant_cte AS (
+                SELECT uuid, parent_uid, size
+                FROM fsentries
+                WHERE parent_uid = ?
+
+                UNION ALL
+
+                SELECT f.uuid, f.parent_uid, f.size
+                FROM fsentries f
+                INNER JOIN descendant_cte d
+                ON f.parent_uid = d.uuid
+            )
+            SELECT SUM(size) AS total_size FROM descendant_cte
+        `;
+        const rows = await db.read(cte_query, [uuid]);
+        return rows[0].total_size;
+    }
+
     /**
     * @param {Object} param
     * @param {File} param.file: The file to write.

src/backend/src/filesystem/FSNodeContext.js

@@ -531,15 +531,13 @@ module.exports = class FSNodeContext {
      * already fetched.
      */
     async fetchSize() {
-        const { fsEntryService } = Context.get('services').values;
-
         // we already have the size for files
         if ( ! this.entry.is_dir ) {
             await this.fetchEntry();
             return this.entry.size;
         }
 
-        this.entry.size = await fsEntryService.get_recursive_size(this.entry.uuid);
+        this.entry.size = await this.provider.get_recursive_size({ node: this });
 
         return this.entry.size;
     }

src/backend/src/filesystem/definitions/capabilities.js

@@ -1,18 +1,18 @@
 /*
  * Copyright (C) 2024-present Puter Technologies Inc.
- * 
+ *
  * This file is part of Puter.
- * 
+ *
  * Puter is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published
  * by the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Affero General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
@@ -35,6 +35,7 @@ const capabilityNames = [
     'copy-tree',
     'move-tree',
     'remove-tree',
+    'get-recursive-size',
 
     // Behavior Capabilities
     'case-sensitive',

src/backend/src/modules/puterfs/SizeService.js

@@ -108,7 +108,7 @@ class SizeService extends BaseService {
         let sz;
         if ( node.entry.is_dir ) {
             if ( node.entry.uuid ) {
-                sz = await fsEntryService.get_recursive_size(node.entry.uuid);
+                sz = await node.fetchSize();
             } else {
                 // very unlikely, but a warning is better than a throw right now
                 // TODO: remove this once we're sure this is never hit