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class VirtualFileSystem {
constructor() {
this.root = { type: 'dir', content: {} };
this.currentPath = [];
this.loadFromStorage();
}
loadFromStorage() {
try {
const saved = localStorage.getItem('webx11_filesystem');
if (saved) {
// Safety: refuse to load if data is excessively large (>512KB raw)
if (saved.length > 524288) {
console.warn('FS data too large (' + (saved.length/1024).toFixed(0) + 'KB), skipping load');
localStorage.removeItem('webx11_filesystem');
return;
}
const data = JSON.parse(saved);
this.root = data.root || this.root;
this.currentPath = data.currentPath || [];
}
} catch (e) { console.error('FS load error:', e); }
}
saveToStorage() {
if (this._storageSavePending) return;
this._storageSavePending = true;
setTimeout(() => {
this._storageSavePending = false;
try {
localStorage.setItem('webx11_filesystem', JSON.stringify({
root: this.root, currentPath: this.currentPath
}));
} catch (e) { console.error('FS save error:', e); }
}, 2000);
}
getCurrentDir() {
let dir = this.root;
for (let part of this.currentPath) {
if (dir.content[part] && dir.content[part].type === 'dir') {
dir = dir.content[part];
} else { return null; }
}
return dir;
}
_toAbsoluteSegments(path) {
if (!path || path === '.' || path === '') return [...this.currentPath];
if (path === '/') return [];
const parts = path.split('/').filter(p => p && p !== '.');
let base = path.startsWith('/') ? [] : [...this.currentPath];
const result = [...base];
for (const p of parts) {
if (p === '..') {
if (result.length > 0) result.pop();
else return null;
} else {
result.push(p);
}
}
return result;
}
_resolvePath(path) {
const segs = this._toAbsoluteSegments(path);
if (segs === null) return null;
if (segs.length === 0) return { dir: this.root, name: null };
let dir = this.root;
for (let i = 0; i < segs.length - 1; i++) {
if (!dir.content[segs[i]] || dir.content[segs[i]].type !== 'dir') return null;
dir = dir.content[segs[i]];
}
return { dir, name: segs[segs.length - 1] };
}
_resolveDir(path) {
const segs = this._toAbsoluteSegments(path);
if (segs === null) return null;
if (segs.length === 0) return this.root;
let dir = this.root;
for (const seg of segs) {
if (!dir.content[seg] || dir.content[seg].type !== 'dir') return null;
dir = dir.content[seg];
}
return dir;
}
ls(path) {
let dir;
if (path) {
const resolved = this._resolvePath(path);
if (!resolved) return [];
if (resolved.name) {
const node = resolved.dir.content[resolved.name];
if (node && node.type === 'dir') dir = node;
else return [];
} else {
dir = resolved.dir;
}
} else {
dir = this.getCurrentDir();
}
if (!dir) return [];
return Object.keys(dir.content).map(name => ({
name, type: dir.content[name].type,
size: dir.content[name].content ? dir.content[name].content.length : 0
}));
}
writeFile(path, content) {
const resolved = this._resolvePath(path);
if (!resolved || !resolved.name) return false;
const name = resolved.name;
if (name === '.' || name === '..') return false;
if (resolved.dir.content[name] && resolved.dir.content[name].type === 'dir') return false;
resolved.dir.content[name] = { type: 'file', content: content, modified: new Date() };
this.saveToStorage();
return true;
}
readFile(path) {
const resolved = this._resolvePath(path);
if (!resolved || !resolved.name) return null;
const node = resolved.dir.content[resolved.name];
if (node && node.type === 'file') return node.content;
return null;
}
deleteFile(path) {
const resolved = this._resolvePath(path);
if (!resolved || !resolved.name) return false;
const node = resolved.dir.content[resolved.name];
if (node && node.type === 'file') {
delete resolved.dir.content[resolved.name];
this.saveToStorage();
return true;
}
return false;
}
mkdir(path) {
const resolved = this._resolvePath(path);
if (!resolved || !resolved.name) return false;
const name = resolved.name;
if (name === '.' || name === '..') return false;
if (resolved.dir.content[name]) return false;
resolved.dir.content[name] = { type: 'dir', content: {} };
this.saveToStorage();
return true;
}
mkdirRecursive(path) {
const segs = this._toAbsoluteSegments(path);
if (!segs || segs.length === 0) return true;
let dir = this.root;
for (const seg of segs) {
if (!dir.content[seg]) {
dir.content[seg] = { type: 'dir', content: {} };
} else if (dir.content[seg].type !== 'dir') {
return false;
}
dir = dir.content[seg];
}
this.saveToStorage();
return true;
}
readDir(path) {
const resolved = this._resolvePath(path);
if (!resolved) return null;
if (resolved.name) {
const node = resolved.dir.content[resolved.name];
return (node && node.type === 'dir') ? node : null;
}
return resolved.dir;
}
copyFile(srcPath, dstPath) {
const src = this._resolvePath(srcPath);
if (!src || !src.name) return false;
const srcNode = src.dir.content[src.name];
if (!srcNode || srcNode.type !== 'file') return false;
const dst = this._resolvePath(dstPath);
if (!dst || !dst.name) return false;
const copy = JSON.parse(JSON.stringify(srcNode));
dst.dir.content[dst.name] = copy;
this.saveToStorage();
return true;
}
copyDir(srcPath, dstPath) {
const src = this._resolvePath(srcPath);
if (!src || !src.name) return false;
const srcNode = src.dir.content[src.name];
if (!srcNode || srcNode.type !== 'dir') return false;
const dst = this._resolvePath(dstPath);
if (!dst || !dst.name) return false;
if (dst.dir.content[dst.name]) return false;
const copy = JSON.parse(JSON.stringify(srcNode));
dst.dir.content[dst.name] = copy;
this.saveToStorage();
return true;
}
moveFile(srcPath, dstPath) {
if (this.copyFile(srcPath, dstPath)) {
const src = this._resolvePath(srcPath);
if (src && src.name) {
delete src.dir.content[src.name];
this.saveToStorage();
return true;
}
}
return false;
}
moveDir(srcPath, dstPath) {
if (this.copyDir(srcPath, dstPath)) {
const src = this._resolvePath(srcPath);
if (src && src.name) {
delete src.dir.content[src.name];
this.saveToStorage();
return true;
}
}
return false;
}
// Old-compat aliases for agent tools and SkillsModule
fsRead(path) {
const content = this.readFile(path);
return content !== null ? content : null;
}
fsWrite(path, content) {
return this.writeFile(path, content);
}
fsReadJSON(path) {
const c = this.fsRead(path);
if (c === null) return null;
try { return JSON.parse(c); } catch (e) { return null; }
}
fsWriteJSON(path, obj) {
return this.fsWrite(path, JSON.stringify(obj));
}
findFiles(pattern) {
const results = [];
const search = (node, path) => {
if (node.type === 'dir' && node.content) {
for (const k of Object.keys(node.content)) {
const sub = node.content[k];
const subPath = path ? path + '/' + k : k;
if (sub.type === 'dir') search(sub, subPath);
else if (sub.type === 'file' && k.toLowerCase().includes(pattern)) results.push(subPath);
}
}
};
search(this.root, '');
return results.sort();
}
deleteDirRecursive(path) {
const resolved = this._resolvePath(path);
if (!resolved || !resolved.name) return false;
const node = resolved.dir.content[resolved.name];
if (!node || node.type !== 'dir') return false;
delete resolved.dir.content[resolved.name];
this.saveToStorage();
return true;
}
// Full state serialization for session save/restore
serializeState() {
return JSON.stringify({
root: this.root,
currentPath: this.currentPath,
version: 1
});
}
restoreState(json) {
try {
const data = JSON.parse(json);
if (!data || !data.root || !data.root.type) return false;
this.root = data.root;
this.currentPath = data.currentPath || [];
this.saveToStorage();
return true;
} catch (e) {
console.error('FS restore error:', e);
return false;
}
}
// Restore VFS from an exported dump file (replaces entire root)
restoreFromExport(content) {
if (typeof content === 'string') {
try { content = JSON.parse(content); } catch (e) { return false; }
}
if (!content || !content.type) return false;
this.root = content;
this.currentPath = [];
this.saveToStorage();
return true;
}
_snapshotDirExists() {
return !!this.readDir('/_snapshots');
}
checkpoint(name) {
if (!name) name = new Date().toISOString();
const createdAt = new Date().toISOString();
const data = {
version: 1,
createdAt,
root: JSON.parse(JSON.stringify(this.root)),
currentPath: [...this.currentPath]
};
if (!this.readDir('/_snapshots')) {
this.mkdirRecursive('/_snapshots');
}
this.fsWriteJSON('/_snapshots/checkpoint-' + name + '.json', data);
this.saveToStorage();
// Auto-manage: keep max 10 checkpoints, delete oldest
const all = this.listCheckpoints();
if (all.length > 10) {
const sorted = all.slice().sort();
const toDelete = sorted.slice(0, all.length - 10);
for (const old of toDelete) this.deleteCheckpoint(old);
}
return true;
}
rollback(name) {
const raw = this.fsReadJSON('/_snapshots/checkpoint-' + name + '.json');
if (!raw || !raw.root) return false;
this.root = raw.root;
this.currentPath = raw.currentPath || [];
this.saveToStorage();
return true;
}
listCheckpoints() {
const dir = this.readDir('/_snapshots');
if (!dir || !dir.content) return [];
const prefix = 'checkpoint-';
const suffix = '.json';
return Object.keys(dir.content)
.filter(k => k.startsWith(prefix) && k.endsWith(suffix))
.map(k => k.slice(prefix.length, k.length - suffix.length))
.sort();
}
deleteCheckpoint(name) {
return this.deleteFile('/_snapshots/checkpoint-' + name + '.json');
}
}
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