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diff --git a/node_modules/mongoose/lib/schema/date.js b/node_modules/mongoose/lib/schema/date.js
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+/*!
+ * Module requirements.
+ */
+
+'use strict';
+
+const MongooseError = require('../error/index');
+const SchemaDateOptions = require('../options/SchemaDateOptions');
+const SchemaType = require('../schematype');
+const castDate = require('../cast/date');
+const utils = require('../utils');
+
+const CastError = SchemaType.CastError;
+
+/**
+ * Date SchemaType constructor.
+ *
+ * @param {String} key
+ * @param {Object} options
+ * @inherits SchemaType
+ * @api public
+ */
+
+function SchemaDate(key, options) {
+  SchemaType.call(this, key, options, 'Date');
+}
+
+/**
+ * This schema type's name, to defend against minifiers that mangle
+ * function names.
+ *
+ * @api public
+ */
+SchemaDate.schemaName = 'Date';
+
+SchemaDate.defaultOptions = {};
+
+/*!
+ * Inherits from SchemaType.
+ */
+SchemaDate.prototype = Object.create(SchemaType.prototype);
+SchemaDate.prototype.constructor = SchemaDate;
+SchemaDate.prototype.OptionsConstructor = SchemaDateOptions;
+
+/*!
+ * ignore
+ */
+
+SchemaDate._cast = castDate;
+
+/**
+ * Sets a default option for all Date instances.
+ *
+ * ####Example:
+ *
+ *     // Make all dates have `required` of true by default.
+ *     mongoose.Schema.Date.set('required', true);
+ *
+ *     const User = mongoose.model('User', new Schema({ test: Date }));
+ *     new User({ }).validateSync().errors.test.message; // Path `test` is required.
+ *
+ * @param {String} option - The option you'd like to set the value for
+ * @param {*} value - value for option
+ * @return {undefined}
+ * @function set
+ * @static
+ * @api public
+ */
+
+SchemaDate.set = SchemaType.set;
+
+/**
+ * Get/set the function used to cast arbitrary values to dates.
+ *
+ * ####Example:
+ *
+ *     // Mongoose converts empty string '' into `null` for date types. You
+ *     // can create a custom caster to disable it.
+ *     const original = mongoose.Schema.Types.Date.cast();
+ *     mongoose.Schema.Types.Date.cast(v => {
+ *       assert.ok(v !== '');
+ *       return original(v);
+ *     });
+ *
+ *     // Or disable casting entirely
+ *     mongoose.Schema.Types.Date.cast(false);
+ *
+ * @param {Function} caster
+ * @return {Function}
+ * @function get
+ * @static
+ * @api public
+ */
+
+SchemaDate.cast = function cast(caster) {
+  if (arguments.length === 0) {
+    return this._cast;
+  }
+  if (caster === false) {
+    caster = v => {
+      if (v != null && !(v instanceof Date)) {
+        throw new Error();
+      }
+      return v;
+    };
+  }
+  this._cast = caster;
+
+  return this._cast;
+};
+
+/**
+ * Declares a TTL index (rounded to the nearest second) for _Date_ types only.
+ *
+ * This sets the `expireAfterSeconds` index option available in MongoDB >= 2.1.2.
+ * This index type is only compatible with Date types.
+ *
+ * ####Example:
+ *
+ *     // expire in 24 hours
+ *     new Schema({ createdAt: { type: Date, expires: 60*60*24 }});
+ *
+ * `expires` utilizes the `ms` module from [guille](https://github.com/guille/) allowing us to use a friendlier syntax:
+ *
+ * ####Example:
+ *
+ *     // expire in 24 hours
+ *     new Schema({ createdAt: { type: Date, expires: '24h' }});
+ *
+ *     // expire in 1.5 hours
+ *     new Schema({ createdAt: { type: Date, expires: '1.5h' }});
+ *
+ *     // expire in 7 days
+ *     const schema = new Schema({ createdAt: Date });
+ *     schema.path('createdAt').expires('7d');
+ *
+ * @param {Number|String} when
+ * @added 3.0.0
+ * @return {SchemaType} this
+ * @api public
+ */
+
+SchemaDate.prototype.expires = function(when) {
+  if (!this._index || this._index.constructor.name !== 'Object') {
+    this._index = {};
+  }
+
+  this._index.expires = when;
+  utils.expires(this._index);
+  return this;
+};
+
+/*!
+ * ignore
+ */
+
+SchemaDate._checkRequired = v => v instanceof Date;
+
+/**
+ * Override the function the required validator uses to check whether a string
+ * passes the `required` check.
+ *
+ * ####Example:
+ *
+ *     // Allow empty strings to pass `required` check
+ *     mongoose.Schema.Types.String.checkRequired(v => v != null);
+ *
+ *     const M = mongoose.model({ str: { type: String, required: true } });
+ *     new M({ str: '' }).validateSync(); // `null`, validation passes!
+ *
+ * @param {Function} fn
+ * @return {Function}
+ * @function checkRequired
+ * @static
+ * @api public
+ */
+
+SchemaDate.checkRequired = SchemaType.checkRequired;
+
+/**
+ * Check if the given value satisfies a required validator. To satisfy
+ * a required validator, the given value must be an instance of `Date`.
+ *
+ * @param {Any} value
+ * @param {Document} doc
+ * @return {Boolean}
+ * @api public
+ */
+
+SchemaDate.prototype.checkRequired = function(value, doc) {
+  if (SchemaType._isRef(this, value, doc, true)) {
+    return !!value;
+  }
+
+  // `require('util').inherits()` does **not** copy static properties, and
+  // plugins like mongoose-float use `inherits()` for pre-ES6.
+  const _checkRequired = typeof this.constructor.checkRequired == 'function' ?
+    this.constructor.checkRequired() :
+    SchemaDate.checkRequired();
+  return _checkRequired(value);
+};
+
+/**
+ * Sets a minimum date validator.
+ *
+ * ####Example:
+ *
+ *     const s = new Schema({ d: { type: Date, min: Date('1970-01-01') })
+ *     const M = db.model('M', s)
+ *     const m = new M({ d: Date('1969-12-31') })
+ *     m.save(function (err) {
+ *       console.error(err) // validator error
+ *       m.d = Date('2014-12-08');
+ *       m.save() // success
+ *     })
+ *
+ *     // custom error messages
+ *     // We can also use the special {MIN} token which will be replaced with the invalid value
+ *     const min = [Date('1970-01-01'), 'The value of path `{PATH}` ({VALUE}) is beneath the limit ({MIN}).'];
+ *     const schema = new Schema({ d: { type: Date, min: min })
+ *     const M = mongoose.model('M', schema);
+ *     const s= new M({ d: Date('1969-12-31') });
+ *     s.validate(function (err) {
+ *       console.log(String(err)) // ValidationError: The value of path `d` (1969-12-31) is before the limit (1970-01-01).
+ *     })
+ *
+ * @param {Date} value minimum date
+ * @param {String} [message] optional custom error message
+ * @return {SchemaType} this
+ * @see Customized Error Messages #error_messages_MongooseError-messages
+ * @api public
+ */
+
+SchemaDate.prototype.min = function(value, message) {
+  if (this.minValidator) {
+    this.validators = this.validators.filter(function(v) {
+      return v.validator !== this.minValidator;
+    }, this);
+  }
+
+  if (value) {
+    let msg = message || MongooseError.messages.Date.min;
+    if (typeof msg === 'string') {
+      msg = msg.replace(/{MIN}/, (value === Date.now ? 'Date.now()' : value.toString()));
+    }
+    const _this = this;
+    this.validators.push({
+      validator: this.minValidator = function(val) {
+        let _value = value;
+        if (typeof value === 'function' && value !== Date.now) {
+          _value = _value.call(this);
+        }
+        const min = (_value === Date.now ? _value() : _this.cast(_value));
+        return val === null || val.valueOf() >= min.valueOf();
+      },
+      message: msg,
+      type: 'min',
+      min: value
+    });
+  }
+
+  return this;
+};
+
+/**
+ * Sets a maximum date validator.
+ *
+ * ####Example:
+ *
+ *     const s = new Schema({ d: { type: Date, max: Date('2014-01-01') })
+ *     const M = db.model('M', s)
+ *     const m = new M({ d: Date('2014-12-08') })
+ *     m.save(function (err) {
+ *       console.error(err) // validator error
+ *       m.d = Date('2013-12-31');
+ *       m.save() // success
+ *     })
+ *
+ *     // custom error messages
+ *     // We can also use the special {MAX} token which will be replaced with the invalid value
+ *     const max = [Date('2014-01-01'), 'The value of path `{PATH}` ({VALUE}) exceeds the limit ({MAX}).'];
+ *     const schema = new Schema({ d: { type: Date, max: max })
+ *     const M = mongoose.model('M', schema);
+ *     const s= new M({ d: Date('2014-12-08') });
+ *     s.validate(function (err) {
+ *       console.log(String(err)) // ValidationError: The value of path `d` (2014-12-08) exceeds the limit (2014-01-01).
+ *     })
+ *
+ * @param {Date} maximum date
+ * @param {String} [message] optional custom error message
+ * @return {SchemaType} this
+ * @see Customized Error Messages #error_messages_MongooseError-messages
+ * @api public
+ */
+
+SchemaDate.prototype.max = function(value, message) {
+  if (this.maxValidator) {
+    this.validators = this.validators.filter(function(v) {
+      return v.validator !== this.maxValidator;
+    }, this);
+  }
+
+  if (value) {
+    let msg = message || MongooseError.messages.Date.max;
+    if (typeof msg === 'string') {
+      msg = msg.replace(/{MAX}/, (value === Date.now ? 'Date.now()' : value.toString()));
+    }
+    const _this = this;
+    this.validators.push({
+      validator: this.maxValidator = function(val) {
+        let _value = value;
+        if (typeof _value === 'function' && _value !== Date.now) {
+          _value = _value.call(this);
+        }
+        const max = (_value === Date.now ? _value() : _this.cast(_value));
+        return val === null || val.valueOf() <= max.valueOf();
+      },
+      message: msg,
+      type: 'max',
+      max: value
+    });
+  }
+
+  return this;
+};
+
+/**
+ * Casts to date
+ *
+ * @param {Object} value to cast
+ * @api private
+ */
+
+SchemaDate.prototype.cast = function(value) {
+  const castDate = typeof this.constructor.cast === 'function' ?
+    this.constructor.cast() :
+    SchemaDate.cast();
+  try {
+    return castDate(value);
+  } catch (error) {
+    throw new CastError('date', value, this.path, error, this);
+  }
+};
+
+/*!
+ * Date Query casting.
+ *
+ * @api private
+ */
+
+function handleSingle(val) {
+  return this.cast(val);
+}
+
+SchemaDate.prototype.$conditionalHandlers =
+    utils.options(SchemaType.prototype.$conditionalHandlers, {
+      $gt: handleSingle,
+      $gte: handleSingle,
+      $lt: handleSingle,
+      $lte: handleSingle
+    });
+
+
+/**
+ * Casts contents for queries.
+ *
+ * @param {String} $conditional
+ * @param {any} [value]
+ * @api private
+ */
+
+SchemaDate.prototype.castForQuery = function($conditional, val) {
+  if (arguments.length !== 2) {
+    return this._castForQuery($conditional);
+  }
+
+  const handler = this.$conditionalHandlers[$conditional];
+
+  if (!handler) {
+    throw new Error('Can\'t use ' + $conditional + ' with Date.');
+  }
+
+  return handler.call(this, val);
+};
+
+/*!
+ * Module exports.
+ */
+
+module.exports = SchemaDate;