mongodb-wrapper/lib/Cursor.js

Exactly-like-the-console wrapper for node-mongodb-native

// Generated by CoffeeScript 1.4.0
(function() {
  var Cursor, EventEmitter, sortSyntax,
    __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

  sortSyntax = require("./sortSyntax");

  EventEmitter = require('events').EventEmitter;

  Cursor = (function(_super) {

    __extends(Cursor, _super);

    function Cursor(collection, selector, fields) {
      var _this = this;
      this.collection = collection;
      this.selector = selector;
      this.fields = fields;
      this._order = [];
      if (this.collection.isOpen()) {
        this._collection = this.collection.rawCollection();
      } else {
        this.collection.once("error", function(err) {
          _this.hasError = err;
          return _this.emit("error", err);
        });
        this.collection.once("ready", function() {
          _this._collection = _this.collection.rawCollection();
          return _this.emit("ready");
        });
      }
    }

    Cursor.prototype.resolve = function(cb) {
      var _this = this;
      if (this._collection) {
        return this._resolve(cb);
      } else if (this.hasError) {
        return cb(this.hasError);
      } else {
        this.once("ready", function() {
          return _this._resolve(cb);
        });
        return this.once("error", cb);
      }
    };

    Cursor.prototype._resolve = function(cb) {
      var cursor, item, _i, _len, _ref;
      if (this._cursor) {
        return cb(null, this._cursor);
      } else {
        cursor = this._collection.find(this.selector, this.fields);
        _ref = this._order;
        for (_i = 0, _len = _ref.length; _i < _len; _i++) {
          item = _ref[_i];
          cursor = cursor[item[0]].apply(cursor, item[1]);
        }
        this._cursor = cursor;
        return cb(null, this._cursor);
      }
    };

    Cursor.prototype.limit = function(limit) {
      this._order.push(["limit", [limit]]);
      return this;
    };

    Cursor.prototype.skip = function(skip) {
      this._order.push(["skip", [skip]]);
      return this;
    };

    Cursor.prototype.sort = function(fields) {
      this._order.push(["sort", [sortSyntax(fields)]]);
      return this;
    };

    Cursor.prototype.one = function(cb) {
      var _this = this;
      this.resolve(function(err, cursor) {
        if (err) {
          return cb(err);
        }
        return cursor.nextObject(cb);
      });
      return this;
    };

    Cursor.prototype.next = function(cb) {
      var _this = this;
      this.resolve(function(err, cursor) {
        if (err) {
          return cb(err);
        }
        return cursor.nextObject(cb);
      });
      return this;
    };

    Cursor.prototype.each = function(cb) {
      var _this = this;
      this.resolve(function(err, cursor) {
        if (err) {
          return cb(err);
        }
        return cursor.each(cb);
      });
      return this;
    };

    Cursor.prototype.explain = function(cb) {
      var _this = this;
      this.resolve(function(err, cursor) {
        if (err) {
          return cb(err);
        }
        return cursor.explain(cb);
      });
      return this;
    };

    Cursor.prototype.toArray = function(cb) {
      var _this = this;
      this.resolve(function(err, cursor) {
        if (err) {
          return cb(err);
        }
        return cursor.toArray(cb);
      });
      return this;
    };

    Cursor.prototype.count = function(cb) {
      var _this = this;
      this.resolve(function(err, cursor) {
        if (err) {
          return cb(err);
        }
        return cursor.count(cb);
      });
      return this;
    };

    Cursor.prototype.getRawCursor = function(cb) {
      return this.resolve(cb);
    };

    return Cursor;

  })(EventEmitter);

  module.exports = Cursor;

}).call(this);