@struktoai/mirage-core/dist/core/google/rename.js

A Unified Virtual Filesystem For AI Agents

// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
import { eisdir, enoent, fsError } from "../../errors/fs.js";
import { INVALID } from "../hierarchy/scope.js";
import { DATE_LEN, appFilename } from "./scope.js";
/**
 * The title a file name gives a file, null when the listing would render
 * that title under any other name. Mirrors Python's `app_title`.
 */
export function appTitle(name, fileId, modified, suffix) {
    const lead = modified.length >= DATE_LEN ? `${modified.slice(0, DATE_LEN)}_` : '';
    const tail = `__${fileId}${suffix}`;
    if (!name.startsWith(lead) || !name.endsWith(tail))
        return null;
    const title = name.slice(lead.length, name.length - tail.length);
    return appFilename(title, fileId, modified, suffix) === name ? title : null;
}
/**
 * The rename of a Google app mount: a new title for a file. A file can take
 * only a name the listing renders back (same folder, date and id); its
 * modified time goes back unchanged, as rename(2) leaves it, and any other
 * name is EPERM. Mirrors Python's `make_app_rename`.
 */
export function makeAppRename(detect, suffix) {
    return async function rename(accessor, src, dst, entry = null) {
        const match = detect(src);
        if (match.kind !== 'file') {
            if (match.kind !== INVALID && !match.scope?.leaf)
                throw eisdir(src.virtual);
            throw enoent(src.virtual);
        }
        if (entry === null)
            throw enoent(src.virtual);
        const docId = String(entry.extra.doc_id);
        const drive = accessor.drive;
        const modified = (await drive.getFile(docId)).modifiedTime ?? '';
        const cut = dst.virtual.lastIndexOf('/');
        const title = appTitle(dst.virtual.slice(cut + 1), docId, modified, suffix);
        if (title === null ||
            dst.virtual.slice(0, cut) !== src.virtual.slice(0, src.virtual.lastIndexOf('/'))) {
            throw fsError(dst, 'EPERM');
        }
        await drive.patchFile(docId, { body: { name: title, modifiedTime: modified } });
    };
}
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