text: "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 = (0, buffer_1.bufferFrom)(str, 'utf8');
          this.touch();
      };
      Node.prototype.getBuffer = function () {
          if (!this.buf)
              this.setBuffer((0, buffer_1.bufferAllocUnsafe)(0));
          return (0, buffer_1.bufferFrom)(this.buf); // Return a copy.
      };
      Node.prototype.setBuffer = function (buf) {
          this.buf = (0, 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 = (0, buffer_1.bufferAllocUnsafe)(0);
          if (pos + len > this.buf.length) {
              var newBuf = (0, 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 = (0, 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 = (0, buffer_1.bufferAllocUnsafe)(0);
          else {
              if (!this.buf)
                  this.buf = (0, buffer_1.bufferAllocUnsafe)(0);
              if (len <= this.buf.length) {
                  this.buf = this.buf.slice(0, len);
              }
              else {
                  var buf = (0, 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.name = name;
          _this.syncSteps();
          return _this;
      }
      Object.defineProperty(Link.prototype, "steps", {
          get: function () {
              return this._steps;
          },
          // Recursively sync children steps, e.g. in case of dir rename
          set: function (val) {
              this._steps = val;
              for (var _i = 0, _a = Object.values(this.children); _i < _a.length; _i++) {
                  var child = _a[_i];
                  child === null || child === void 0 ? void 0 : child.syncSteps();
              }
          },
          enumerable: false,
          configurable: true
      });
      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),
          };
      };
      Link.prototype.syncSteps = function () {
          this.steps = this.parent ? this.parent.steps.concat([this.name]) : [this.name];
      };
      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;
  