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