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"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
if (typeof b !== "function" && b !== null)
throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.File = exports.Link = exports.Node = exports.SEP = void 0;
var process_1 = require("./process");
var buffer_1 = require("./internal/buffer");
var constants_1 = require("./constants");
var events_1 = require("events");
var Stats_1 = require("./Stats");
var S_IFMT = constants_1.constants.S_IFMT, S_IFDIR = constants_1.constants.S_IFDIR, S_IFREG = constants_1.constants.S_IFREG, S_IFLNK = constants_1.constants.S_IFLNK, O_APPEND = constants_1.constants.O_APPEND;
exports.SEP = '/';
/**
* Node in a file system (like i-node, v-node).
*/
var Node = /** @class */ (function (_super) {
__extends(Node, _super);
function Node(ino, perm) {
if (perm === void 0) { perm = 438; }
var _this = _super.call(this) || this;
// User ID and group ID.
_this.uid = process_1.default.getuid();
_this.gid = process_1.default.getgid();
_this.atime = new Date();
_this.mtime = new Date();
_this.ctime = new Date();
_this.perm = 438; // Permissions `chmod`, `fchmod`
_this.mode = S_IFREG; // S_IFDIR, S_IFREG, etc.. (file by default?)
// Number of hard links pointing at this Node.
_this.nlink = 1;
_this.perm = perm;
_this.mode |= perm;
_this.ino = ino;
return _this;
}
Node.prototype.getString = function (encoding) {
if (encoding === void 0) { encoding = 'utf8'; }
return this.getBuffer().toString(encoding);
};
Node.prototype.setString = function (str) {
// this.setBuffer(bufferFrom(str, 'utf8'));
this.buf = buffer_1.bufferFrom(str, 'utf8');
this.touch();
};
Node.prototype.getBuffer = function () {
if (!this.buf)
this.setBuffer(buffer_1.bufferAllocUnsafe(0));
return buffer_1.bufferFrom(this.buf); // Return a copy.
};
Node.prototype.setBuffer = function (buf) {
this.buf = buffer_1.bufferFrom(buf); // Creates a copy of data.
this.touch();
};
Node.prototype.getSize = function () {
return this.buf ? this.buf.length : 0;
};
Node.prototype.setModeProperty = function (property) {
this.mode = (this.mode & ~S_IFMT) | property;
};
Node.prototype.setIsFile = function () {
this.setModeProperty(S_IFREG);
};
Node.prototype.setIsDirectory = function () {
this.setModeProperty(S_IFDIR);
};
Node.prototype.setIsSymlink = function () {
this.setModeProperty(S_IFLNK);
};
Node.prototype.isFile = function () {
return (this.mode & S_IFMT) === S_IFREG;
};
Node.prototype.isDirectory = function () {
return (this.mode & S_IFMT) === S_IFDIR;
};
Node.prototype.isSymlink = function () {
// return !!this.symlink;
return (this.mode & S_IFMT) === S_IFLNK;
};
Node.prototype.makeSymlink = function (steps) {
this.symlink = steps;
this.setIsSymlink();
};
Node.prototype.write = function (buf, off, len, pos) {
if (off === void 0) { off = 0; }
if (len === void 0) { len = buf.length; }
if (pos === void 0) { pos = 0; }
if (!this.buf)
this.buf = buffer_1.bufferAllocUnsafe(0);
if (pos + len > this.buf.length) {
var newBuf = buffer_1.bufferAllocUnsafe(pos + len);
this.buf.copy(newBuf, 0, 0, this.buf.length);
this.buf = newBuf;
}
buf.copy(this.buf, pos, off, off + len);
this.touch();
return len;
};
// Returns the number of bytes read.
Node.prototype.read = function (buf, off, len, pos) {
if (off === void 0) { off = 0; }
if (len === void 0) { len = buf.byteLength; }
if (pos === void 0) { pos = 0; }
if (!this.buf)
this.buf = buffer_1.bufferAllocUnsafe(0);
var actualLen = len;
if (actualLen > buf.byteLength) {
actualLen = buf.byteLength;
}
if (actualLen + pos > this.buf.length) {
actualLen = this.buf.length - pos;
}
this.buf.copy(buf, off, pos, pos + actualLen);
return actualLen;
};
Node.prototype.truncate = function (len) {
if (len === void 0) { len = 0; }
if (!len)
this.buf = buffer_1.bufferAllocUnsafe(0);
else {
if (!this.buf)
this.buf = buffer_1.bufferAllocUnsafe(0);
if (len <= this.buf.length) {
this.buf = this.buf.slice(0, len);
}
else {
var buf = buffer_1.bufferAllocUnsafe(0);
this.buf.copy(buf);
buf.fill(0, len);
}
}
this.touch();
};
Node.prototype.chmod = function (perm) {
this.perm = perm;
this.mode = (this.mode & ~511) | perm;
this.touch();
};
Node.prototype.chown = function (uid, gid) {
this.uid = uid;
this.gid = gid;
this.touch();
};
Node.prototype.touch = function () {
this.mtime = new Date();
this.emit('change', this);
};
Node.prototype.canRead = function (uid, gid) {
if (uid === void 0) { uid = process_1.default.getuid(); }
if (gid === void 0) { gid = process_1.default.getgid(); }
if (this.perm & 4 /* IROTH */) {
return true;
}
if (gid === this.gid) {
if (this.perm & 32 /* IRGRP */) {
return true;
}
}
if (uid === this.uid) {
if (this.perm & 256 /* IRUSR */) {
return true;
}
}
return false;
};
Node.prototype.canWrite = function (uid, gid) {
if (uid === void 0) { uid = process_1.default.getuid(); }
if (gid === void 0) { gid = process_1.default.getgid(); }
if (this.perm & 2 /* IWOTH */) {
return true;
}
if (gid === this.gid) {
if (this.perm & 16 /* IWGRP */) {
return true;
}
}
if (uid === this.uid) {
if (this.perm & 128 /* IWUSR */) {
return true;
}
}
return false;
};
Node.prototype.del = function () {
this.emit('delete', this);
};
Node.prototype.toJSON = function () {
return {
ino: this.ino,
uid: this.uid,
gid: this.gid,
atime: this.atime.getTime(),
mtime: this.mtime.getTime(),
ctime: this.ctime.getTime(),
perm: this.perm,
mode: this.mode,
nlink: this.nlink,
symlink: this.symlink,
data: this.getString(),
};
};
return Node;
}(events_1.EventEmitter));
exports.Node = Node;
/**
* Represents a hard link that points to an i-node `node`.
*/
var Link = /** @class */ (function (_super) {
__extends(Link, _super);
function Link(vol, parent, name) {
var _this = _super.call(this) || this;
_this.children = {};
// Path to this node as Array: ['usr', 'bin', 'node'].
_this.steps = [];
// "i-node" number of the node.
_this.ino = 0;
// Number of children.
_this.length = 0;
_this.vol = vol;
_this.parent = parent;
_this.steps = parent ? parent.steps.concat([name]) : [name];
return _this;
}
Link.prototype.setNode = function (node) {
this.node = node;
this.ino = node.ino;
};
Link.prototype.getNode = function () {
return this.node;
};
Link.prototype.createChild = function (name, node) {
if (node === void 0) { node = this.vol.createNode(); }
var link = new Link(this.vol, this, name);
link.setNode(node);
if (node.isDirectory()) {
// link.setChild('.', link);
// link.getNode().nlink++;
// link.setChild('..', this);
// this.getNode().nlink++;
}
this.setChild(name, link);
return link;
};
Link.prototype.setChild = function (name, link) {
if (link === void 0) { link = new Link(this.vol, this, name); }
this.children[name] = link;
link.parent = this;
this.length++;
this.emit('child:add', link, this);
return link;
};
Link.prototype.deleteChild = function (link) {
delete this.children[link.getName()];
this.length--;
this.emit('child:delete', link, this);
};
Link.prototype.getChild = function (name) {
if (Object.hasOwnProperty.call(this.children, name)) {
return this.children[name];
}
};
Link.prototype.getPath = function () {
return this.steps.join(exports.SEP);
};
Link.prototype.getName = function () {
return this.steps[this.steps.length - 1];
};
// del() {
// const parent = this.parent;
// if(parent) {
// parent.deleteChild(link);
// }
// this.parent = null;
// this.vol = null;
// }
/**
* Walk the tree path and return the `Link` at that location, if any.
* @param steps {string[]} Desired location.
* @param stop {number} Max steps to go into.
* @param i {number} Current step in the `steps` array.
*
* @return {Link|null}
*/
Link.prototype.walk = function (steps, stop, i) {
if (stop === void 0) { stop = steps.length; }
if (i === void 0) { i = 0; }
if (i >= steps.length)
return this;
if (i >= stop)
return this;
var step = steps[i];
var link = this.getChild(step);
if (!link)
return null;
return link.walk(steps, stop, i + 1);
};
Link.prototype.toJSON = function () {
return {
steps: this.steps,
ino: this.ino,
children: Object.keys(this.children),
};
};
return Link;
}(events_1.EventEmitter));
exports.Link = Link;
/**
* Represents an open file (file descriptor) that points to a `Link` (Hard-link) and a `Node`.
*/
var File = /** @class */ (function () {
/**
* Open a Link-Node pair. `node` is provided separately as that might be a different node
* rather the one `link` points to, because it might be a symlink.
* @param link
* @param node
* @param flags
* @param fd
*/
function File(link, node, flags, fd) {
/**
* A cursor/offset position in a file, where data will be written on write.
* User can "seek" this position.
*/
this.position = 0;
this.link = link;
this.node = node;
this.flags = flags;
this.fd = fd;
}
File.prototype.getString = function (encoding) {
if (encoding === void 0) { encoding = 'utf8'; }
return this.node.getString();
};
File.prototype.setString = function (str) {
this.node.setString(str);
};
File.prototype.getBuffer = function () {
return this.node.getBuffer();
};
File.prototype.setBuffer = function (buf) {
this.node.setBuffer(buf);
};
File.prototype.getSize = function () {
return this.node.getSize();
};
File.prototype.truncate = function (len) {
this.node.truncate(len);
};
File.prototype.seekTo = function (position) {
this.position = position;
};
File.prototype.stats = function () {
return Stats_1.default.build(this.node);
};
File.prototype.write = function (buf, offset, length, position) {
if (offset === void 0) { offset = 0; }
if (length === void 0) { length = buf.length; }
if (typeof position !== 'number')
position = this.position;
if (this.flags & O_APPEND)
position = this.getSize();
var bytes = this.node.write(buf, offset, length, position);
this.position = position + bytes;
return bytes;
};
File.prototype.read = function (buf, offset, length, position) {
if (offset === void 0) { offset = 0; }
if (length === void 0) { length = buf.byteLength; }
if (typeof position !== 'number')
position = this.position;
var bytes = this.node.read(buf, offset, length, position);
this.position = position + bytes;
return bytes;
};
File.prototype.chmod = function (perm) {
this.node.chmod(perm);
};
File.prototype.chown = function (uid, gid) {
this.node.chown(uid, gid);
};
return File;
}());
exports.File = File;