export class Stats {
    // The following constant were extracted from `man 2 stat` on Ubuntu 12.10.
    public static S_IFMT = 0o170000; // bit mask for the file type bit fields

    public static S_IFSOCK = 0o140000; // socket

    public static S_IFLNK = 0o120000; // symbolic link

    public static S_IFREG = 0o100000; // regular file

    public static S_IFBLK = 0o060000; // block device

    public static S_IFDIR = 0o040000; // directory

    public static S_IFCHR = 0o020000; // character device

    public static S_IFIFO = 0o010000; // FIFO

    public static S_ISUID = 0o004000; // set UID bit

    public static S_ISGID = 0o002000; // set-group-ID bit (see below)

    public static S_ISVTX = 0o001000; // sticky bit (see below)

    public static S_IRWXU = 0o0700; // mask for file owner permissions

    public static S_IRUSR = 0o0400; // owner has read permission

    public static S_IWUSR = 0o0200; // owner has write permission

    public static S_IXUSR = 0o0100; // owner has execute permission

    public static S_IRWXG = 0o0070; // mask for group permissions

    public static S_IRGRP = 0o0040; // group has read permission

    public readonly mtime: Date;

    constructor(public readonly mode: number, public readonly size: number, mtime: number) {
        this.mtime = new Date(mtime * 1000);
    }

    private checkModeProperty(property: number): boolean {
        return (this.mode & Stats.S_IFMT) === property;
    }
    public isBlockDevice(): boolean {
        return this.checkModeProperty(Stats.S_IFBLK);
    }
    public isCharacterDevice(): boolean {
        return this.checkModeProperty(Stats.S_IFCHR);
    }
    public isDirectory(): boolean {
        return this.checkModeProperty(Stats.S_IFDIR);
    }
    public isFIFO(): boolean {
        return this.checkModeProperty(Stats.S_IFIFO);
    }
    public isisSocket(): boolean {
        return this.checkModeProperty(Stats.S_IFSOCK);
    }
    public isSymbolicLink(): boolean {
        return this.checkModeProperty(Stats.S_IFLNK);
    }
    public isFile(): boolean {
        return this.checkModeProperty(Stats.S_IFREG);
    }
}