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/*! * Module dependencies. */
'use strict';
const NodeJSDocument = require('./document');const EventEmitter = require('events').EventEmitter;const MongooseError = require('./error/index');const Schema = require('./schema');const ObjectId = require('./types/objectid');const ValidationError = MongooseError.ValidationError;const applyHooks = require('./helpers/model/applyHooks');const isObject = require('./helpers/isObject');
/** * Document constructor. * * @param {Object} obj the values to set * @param {Object} schema * @param {Object} [fields] optional object containing the fields which were selected in the query returning this document and any populated paths data * @param {Boolean} [skipId] bool, should we auto create an ObjectId _id * @inherits NodeJS EventEmitter https://nodejs.org/api/events.html#class-eventemitter * @event `init`: Emitted on a document after it has was retrieved from the db and fully hydrated by Mongoose. * @event `save`: Emitted when the document is successfully saved * @api private */
function Document(obj, schema, fields, skipId, skipInit) {  if (!(this instanceof Document)) {    return new Document(obj, schema, fields, skipId, skipInit);  }
  if (isObject(schema) && !schema.instanceOfSchema) {    schema = new Schema(schema);  }
  // When creating EmbeddedDocument, it already has the schema and he doesn't need the _id  schema = this.schema || schema;
  // Generate ObjectId if it is missing, but it requires a scheme  if (!this.schema && schema.options._id) {    obj = obj || {};
    if (obj._id === undefined) {      obj._id = new ObjectId();    }  }
  if (!schema) {    throw new MongooseError.MissingSchemaError();  }
  this.$__setSchema(schema);
  NodeJSDocument.call(this, obj, fields, skipId, skipInit);
  applyHooks(this, schema, { decorateDoc: true });
  // apply methods  for (const m in schema.methods) {    this[m] = schema.methods[m];  }  // apply statics  for (const s in schema.statics) {    this[s] = schema.statics[s];  }}
/*! * Inherit from the NodeJS document */
Document.prototype = Object.create(NodeJSDocument.prototype);Document.prototype.constructor = Document;
/*! * ignore */
Document.events = new EventEmitter();
/*! * Browser doc exposes the event emitter API */
Document.$emitter = new EventEmitter();
['on', 'once', 'emit', 'listeners', 'removeListener', 'setMaxListeners',  'removeAllListeners', 'addListener'].forEach(function(emitterFn) {  Document[emitterFn] = function() {    return Document.$emitter[emitterFn].apply(Document.$emitter, arguments);  };});
/*! * Module exports. */
Document.ValidationError = ValidationError;module.exports = exports = Document;