@ezdevlol/memfs/lib/Stats.js

In-memory file-system with Node's fs API.

import { constants } from './constants';
const { S_IFMT, S_IFDIR, S_IFREG, S_IFBLK, S_IFCHR, S_IFLNK, S_IFIFO, S_IFSOCK } = constants;
/**
 * Statistics about a file/directory, like `fs.Stats`.
 */
export class Stats {
    static build(node, bigint = false) {
        const stats = new Stats();
        const { uid, gid, atime, mtime, ctime } = node;
        const getStatNumber = !bigint ? number => number : number => BigInt(number);
        // Copy all values on Stats from Node, so that if Node values
        // change, values on Stats would still be the old ones,
        // just like in Node fs.
        stats.uid = getStatNumber(uid);
        stats.gid = getStatNumber(gid);
        stats.rdev = getStatNumber(node.rdev);
        stats.blksize = getStatNumber(4096);
        stats.ino = getStatNumber(node.ino);
        stats.size = getStatNumber(node.getSize());
        stats.blocks = getStatNumber(1);
        stats.atime = atime;
        stats.mtime = mtime;
        stats.ctime = ctime;
        stats.birthtime = ctime;
        stats.atimeMs = getStatNumber(atime.getTime());
        stats.mtimeMs = getStatNumber(mtime.getTime());
        const ctimeMs = getStatNumber(ctime.getTime());
        stats.ctimeMs = ctimeMs;
        stats.birthtimeMs = ctimeMs;
        if (bigint) {
            stats.atimeNs = BigInt(atime.getTime()) * BigInt(1000000);
            stats.mtimeNs = BigInt(mtime.getTime()) * BigInt(1000000);
            const ctimeNs = BigInt(ctime.getTime()) * BigInt(1000000);
            stats.ctimeNs = ctimeNs;
            stats.birthtimeNs = ctimeNs;
        }
        stats.dev = getStatNumber(0);
        stats.mode = getStatNumber(node.mode);
        stats.nlink = getStatNumber(node.nlink);
        return stats;
    }
    uid;
    gid;
    rdev;
    blksize;
    ino;
    size;
    blocks;
    atime;
    mtime;
    ctime;
    birthtime;
    atimeMs;
    mtimeMs;
    ctimeMs;
    birthtimeMs;
    // additional properties that exist when bigint is true
    atimeNs;
    mtimeNs;
    ctimeNs;
    birthtimeNs;
    dev;
    mode;
    nlink;
    _checkModeProperty(property) {
        return (Number(this.mode) & S_IFMT) === property;
    }
    isDirectory() {
        return this._checkModeProperty(S_IFDIR);
    }
    isFile() {
        return this._checkModeProperty(S_IFREG);
    }
    isBlockDevice() {
        return this._checkModeProperty(S_IFBLK);
    }
    isCharacterDevice() {
        return this._checkModeProperty(S_IFCHR);
    }
    isSymbolicLink() {
        return this._checkModeProperty(S_IFLNK);
    }
    isFIFO() {
        return this._checkModeProperty(S_IFIFO);
    }
    isSocket() {
        return this._checkModeProperty(S_IFSOCK);
    }
}
export default Stats;