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server/node_modules/mongoose/lib/schema/documentarray.js

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+'use strict';
+
+/*!
+ * Module dependencies.
+ */
+
+const ArrayType = require('./array');
+const CastError = require('../error/cast');
+const EventEmitter = require('events').EventEmitter;
+const SchemaType = require('../schematype');
+const discriminator = require('../helpers/model/discriminator');
+const util = require('util');
+const utils = require('../utils');
+const getDiscriminatorByValue = require('../queryhelpers').getDiscriminatorByValue;
+
+let MongooseDocumentArray;
+let Subdocument;
+
+/**
+ * SubdocsArray SchemaType constructor
+ *
+ * @param {String} key
+ * @param {Schema} schema
+ * @param {Object} options
+ * @inherits SchemaArray
+ * @api public
+ */
+
+function DocumentArray(key, schema, options, schemaOptions) {
+  const EmbeddedDocument = _createConstructor(schema, options);
+  EmbeddedDocument.prototype.$basePath = key;
+
+  ArrayType.call(this, key, EmbeddedDocument, options);
+
+  this.schema = schema;
+  this.schemaOptions = schemaOptions || {};
+  this.$isMongooseDocumentArray = true;
+  const fn = this.defaultValue;
+
+  if (!('defaultValue' in this) || fn !== void 0) {
+    this.default(function() {
+      let arr = fn.call(this);
+      if (!Array.isArray(arr)) {
+        arr = [arr];
+      }
+      // Leave it up to `cast()` to convert this to a documentarray
+      return arr;
+    });
+  }
+}
+
+/**
+ * This schema type's name, to defend against minifiers that mangle
+ * function names.
+ *
+ * @api public
+ */
+DocumentArray.schemaName = 'DocumentArray';
+
+/*!
+ * Inherits from ArrayType.
+ */
+DocumentArray.prototype = Object.create(ArrayType.prototype);
+DocumentArray.prototype.constructor = DocumentArray;
+
+/*!
+ * Ignore
+ */
+
+function _createConstructor(schema, options) {
+  Subdocument || (Subdocument = require('../types/embedded'));
+
+  // compile an embedded document for this schema
+  function EmbeddedDocument() {
+    Subdocument.apply(this, arguments);
+  }
+
+  EmbeddedDocument.prototype = Object.create(Subdocument.prototype);
+  EmbeddedDocument.prototype.$__setSchema(schema);
+  EmbeddedDocument.schema = schema;
+  EmbeddedDocument.prototype.constructor = EmbeddedDocument;
+  EmbeddedDocument.$isArraySubdocument = true;
+
+  // apply methods
+  for (const i in schema.methods) {
+    EmbeddedDocument.prototype[i] = schema.methods[i];
+  }
+
+  // apply statics
+  for (const i in schema.statics) {
+    EmbeddedDocument[i] = schema.statics[i];
+  }
+
+  for (const i in EventEmitter.prototype) {
+    EmbeddedDocument[i] = EventEmitter.prototype[i];
+  }
+
+  EmbeddedDocument.options = options;
+
+  return EmbeddedDocument;
+}
+
+/*!
+ * Ignore
+ */
+
+DocumentArray.prototype.discriminator = function(name, schema) {
+  if (typeof name === 'function') {
+    name = utils.getFunctionName(name);
+  }
+
+  schema = discriminator(this.casterConstructor, name, schema);
+
+  const EmbeddedDocument = _createConstructor(schema);
+  EmbeddedDocument.baseCasterConstructor = this.casterConstructor;
+
+  try {
+    Object.defineProperty(EmbeddedDocument, 'name', {
+      value: name
+    });
+  } catch (error) {
+    // Ignore error, only happens on old versions of node
+  }
+
+  this.casterConstructor.discriminators[name] = EmbeddedDocument;
+
+  return this.casterConstructor.discriminators[name];
+};
+
+/**
+ * Performs local validations first, then validations on each embedded doc
+ *
+ * @api private
+ */
+
+DocumentArray.prototype.doValidate = function(array, fn, scope, options) {
+  // lazy load
+  MongooseDocumentArray || (MongooseDocumentArray = require('../types/documentarray'));
+
+  const _this = this;
+  SchemaType.prototype.doValidate.call(this, array, function(err) {
+    if (err) {
+      return fn(err);
+    }
+
+    let count = array && array.length;
+    let error;
+
+    if (!count) {
+      return fn();
+    }
+    if (options && options.updateValidator) {
+      return fn();
+    }
+    if (!array.isMongooseDocumentArray) {
+      array = new MongooseDocumentArray(array, _this.path, scope);
+    }
+
+    // handle sparse arrays, do not use array.forEach which does not
+    // iterate over sparse elements yet reports array.length including
+    // them :(
+
+    function callback(err) {
+      if (err) {
+        error = err;
+      }
+      --count || fn(error);
+    }
+
+    for (let i = 0, len = count; i < len; ++i) {
+      // sidestep sparse entries
+      let doc = array[i];
+      if (doc == null) {
+        --count || fn(error);
+        continue;
+      }
+
+      // If you set the array index directly, the doc might not yet be
+      // a full fledged mongoose subdoc, so make it into one.
+      if (!(doc instanceof Subdocument)) {
+        doc = array[i] = new _this.casterConstructor(doc, array, undefined,
+          undefined, i);
+      }
+
+      doc.$__validate(callback);
+    }
+  }, scope);
+};
+
+/**
+ * Performs local validations first, then validations on each embedded doc.
+ *
+ * ####Note:
+ *
+ * This method ignores the asynchronous validators.
+ *
+ * @return {MongooseError|undefined}
+ * @api private
+ */
+
+DocumentArray.prototype.doValidateSync = function(array, scope) {
+  const schemaTypeError = SchemaType.prototype.doValidateSync.call(this, array, scope);
+  if (schemaTypeError) {
+    return schemaTypeError;
+  }
+
+  let count = array && array.length,
+      resultError = null;
+
+  if (!count) {
+    return;
+  }
+
+  // handle sparse arrays, do not use array.forEach which does not
+  // iterate over sparse elements yet reports array.length including
+  // them :(
+
+  for (let i = 0, len = count; i < len; ++i) {
+    // only first error
+    if (resultError) {
+      break;
+    }
+    // sidestep sparse entries
+    let doc = array[i];
+    if (!doc) {
+      continue;
+    }
+
+    // If you set the array index directly, the doc might not yet be
+    // a full fledged mongoose subdoc, so make it into one.
+    if (!(doc instanceof Subdocument)) {
+      doc = array[i] = new this.casterConstructor(doc, array, undefined,
+        undefined, i);
+    }
+
+    const subdocValidateError = doc.validateSync();
+
+    if (subdocValidateError) {
+      resultError = subdocValidateError;
+    }
+  }
+
+  return resultError;
+};
+
+/**
+ * Casts contents
+ *
+ * @param {Object} value
+ * @param {Document} document that triggers the casting
+ * @api private
+ */
+
+DocumentArray.prototype.cast = function(value, doc, init, prev, options) {
+  // lazy load
+  MongooseDocumentArray || (MongooseDocumentArray = require('../types/documentarray'));
+
+  let selected;
+  let subdoc;
+  let i;
+  const _opts = { transform: false, virtuals: false };
+
+  if (!Array.isArray(value)) {
+    // gh-2442 mark whole array as modified if we're initializing a doc from
+    // the db and the path isn't an array in the document
+    if (!!doc && init) {
+      doc.markModified(this.path);
+    }
+    return this.cast([value], doc, init, prev);
+  }
+
+  if (!(value && value.isMongooseDocumentArray) &&
+      (!options || !options.skipDocumentArrayCast)) {
+    value = new MongooseDocumentArray(value, this.path, doc);
+    _clearListeners(prev);
+  } else if (value && value.isMongooseDocumentArray) {
+    // We need to create a new array, otherwise change tracking will
+    // update the old doc (gh-4449)
+    value = new MongooseDocumentArray(value, this.path, doc);
+  }
+
+  i = value.length;
+
+  while (i--) {
+    if (!value[i]) {
+      continue;
+    }
+
+    let Constructor = this.casterConstructor;
+    if (Constructor.discriminators &&
+        Constructor.schema &&
+        Constructor.schema.options &&
+        typeof value[i][Constructor.schema.options.discriminatorKey] === 'string') {
+      if (Constructor.discriminators[value[i][Constructor.schema.options.discriminatorKey]]) {
+        Constructor = Constructor.discriminators[value[i][Constructor.schema.options.discriminatorKey]];
+      } else {
+        const constructorByValue = getDiscriminatorByValue(Constructor, value[i][Constructor.schema.options.discriminatorKey]);
+        if (constructorByValue) {
+          Constructor = constructorByValue;
+        }
+      }
+    }
+
+    // Check if the document has a different schema (re gh-3701)
+    if ((value[i].$__) &&
+        value[i].schema !== Constructor.schema) {
+      value[i] = value[i].toObject({ transform: false, virtuals: false });
+    }
+    if (!(value[i] instanceof Subdocument) && value[i]) {
+      if (init) {
+        if (doc) {
+          selected || (selected = scopePaths(this, doc.$__.selected, init));
+        } else {
+          selected = true;
+        }
+
+        subdoc = new Constructor(null, value, true, selected, i);
+        value[i] = subdoc.init(value[i]);
+      } else {
+        if (prev && (subdoc = prev.id(value[i]._id))) {
+          subdoc = prev.id(value[i]._id);
+        }
+
+        if (prev && subdoc && utils.deepEqual(subdoc.toObject(_opts), value[i])) {
+          // handle resetting doc with existing id and same data
+          subdoc.set(value[i]);
+          // if set() is hooked it will have no return value
+          // see gh-746
+          value[i] = subdoc;
+        } else {
+          try {
+            subdoc = new Constructor(value[i], value, undefined,
+              undefined, i);
+            // if set() is hooked it will have no return value
+            // see gh-746
+            value[i] = subdoc;
+          } catch (error) {
+            // Make sure we don't leave listeners dangling because `value`
+            // won't get back up to the schema type. See gh-6723
+            _clearListeners(value);
+            const valueInErrorMessage = util.inspect(value[i]);
+            throw new CastError('embedded', valueInErrorMessage,
+              value._path, error);
+          }
+        }
+      }
+    }
+  }
+
+  return value;
+};
+
+/*!
+ * Removes listeners from parent
+ */
+
+function _clearListeners(arr) {
+  if (arr == null || arr._parent == null) {
+    return;
+  }
+
+  for (const key in arr._handlers) {
+    arr._parent.removeListener(key, arr._handlers[key]);
+  }
+}
+
+/*!
+ * Scopes paths selected in a query to this array.
+ * Necessary for proper default application of subdocument values.
+ *
+ * @param {DocumentArray} array - the array to scope `fields` paths
+ * @param {Object|undefined} fields - the root fields selected in the query
+ * @param {Boolean|undefined} init - if we are being created part of a query result
+ */
+
+function scopePaths(array, fields, init) {
+  if (!(init && fields)) {
+    return undefined;
+  }
+
+  const path = array.path + '.';
+  const keys = Object.keys(fields);
+  let i = keys.length;
+  const selected = {};
+  let hasKeys;
+  let key;
+  let sub;
+
+  while (i--) {
+    key = keys[i];
+    if (key.indexOf(path) === 0) {
+      sub = key.substring(path.length);
+      if (sub === '$') {
+        continue;
+      }
+      if (sub.indexOf('$.') === 0) {
+        sub = sub.substr(2);
+      }
+      hasKeys || (hasKeys = true);
+      selected[sub] = fields[key];
+    }
+  }
+
+  return hasKeys && selected || undefined;
+}
+
+/*!
+ * Module exports.
+ */
+
+module.exports = DocumentArray;