archangel-irk/storage

'use strict';

/*!
 * Module requirements.
 */

var SchemaType = require('../schematype')
  , CastError = SchemaType.CastError
  , errorMessages = require('../error').messages;

/**
 * Number SchemaType constructor.
 *
 * @param {String} key
 * @param {Object} options
 * @inherits SchemaType
 * @api private
 */
function NumberSchema (key, options) {
  SchemaType.call(this, key, options, 'Number');
}

/*!
 * Inherits from SchemaType.
 */
NumberSchema.prototype = Object.create( SchemaType.prototype );
NumberSchema.prototype.constructor = NumberSchema;

/**
 * Required validator for number
 *
 * @api private
 */
NumberSchema.prototype.checkRequired = function ( value ) {
  if ( SchemaType._isRef( this, value ) ) {
    return null != value;
  } else {
    return typeof value === 'number' || value instanceof Number;
  }
};

/**
 * Sets a minimum number validator.
 *
 * ####Example:
 *
 *     var s = new Schema({ n: { type: Number, min: 10 })
 *     var M = db.model('M', s)
 *     var m = new M({ n: 9 })
 *     m.save(function (err) {
 *       console.error(err) // validator error
 *       m.n = 10;
 *       m.save() // success
 *     })
 *
 *     // custom error messages
 *     // We can also use the special {MIN} token which will be replaced with the invalid value
 *     var min = [10, 'The value of path `{PATH}` ({VALUE}) is beneath the limit ({MIN}).'];
 *     var schema = new Schema({ n: { type: Number, min: min })
 *     var M = mongoose.model('Measurement', schema);
 *     var s= new M({ n: 4 });
 *     s.validate(function (err) {
 *       console.log(String(err)) // ValidationError: The value of path `n` (4) is beneath the limit (10).
 *     })
 *
 * @param {Number} value minimum number
 * @param {String} [message] optional custom error message
 * @return {SchemaType} this
 * @see Customized Error Messages #error_messages_StorageError-messages
 * @api public
 */
NumberSchema.prototype.min = function (value, message) {
  if (this.minValidator) {
    this.validators = this.validators.filter(function (v) {
      return v.validator != this.minValidator;
    }, this);
  }

  if (null != value) {
    var msg = message || errorMessages.Number.min;
    msg = msg.replace(/{MIN}/, value);
    this.validators.push({
      validator: this.minValidator = function (v) {
        return v === null || v >= value;
      },
      message: msg,
      type: 'min'
    });
  }

  return this;
};

/**
 * Sets a maximum number validator.
 *
 * ####Example:
 *
 *     var s = new Schema({ n: { type: Number, max: 10 })
 *     var M = db.model('M', s)
 *     var m = new M({ n: 11 })
 *     m.save(function (err) {
 *       console.error(err) // validator error
 *       m.n = 10;
 *       m.save() // success
 *     })
 *
 *     // custom error messages
 *     // We can also use the special {MAX} token which will be replaced with the invalid value
 *     var max = [10, 'The value of path `{PATH}` ({VALUE}) exceeds the limit ({MAX}).'];
 *     var schema = new Schema({ n: { type: Number, max: max })
 *     var M = mongoose.model('Measurement', schema);
 *     var s= new M({ n: 4 });
 *     s.validate(function (err) {
 *       console.log(String(err)) // ValidationError: The value of path `n` (4) exceeds the limit (10).
 *     })
 *
 * @param {Number} value maximum number
 * @param {String} [message] optional custom error message
 * @return {SchemaType} this
 * @see Customized Error Messages #error_messages_StorageError-messages
 * @api public
 */
NumberSchema.prototype.max = function (value, message) {
  if (this.maxValidator) {
    this.validators = this.validators.filter(function(v){
      return v.validator != this.maxValidator;
    }, this);
  }

  if (null != value) {
    var msg = message || errorMessages.Number.max;
    msg = msg.replace(/{MAX}/, value);
    this.validators.push({
      validator: this.maxValidator = function(v) {
        return v === null || v <= value;
      },
      message: msg,
      type: 'max'
    });
  }

  return this;
};

/**
 * Casts to number
 *
 * @param {Object} value value to cast
 * @api private
 */
NumberSchema.prototype.cast = function ( value ) {
  var val = value && value._id
    ? value._id // documents
    : value;

  if (!isNaN(val)){
    if (null === val) return val;
    if ('' === val) return null;
    if ('string' === typeof val) val = Number(val);
    if (val instanceof Number) return val;
    if ('number' === typeof val) return val;
    if (val.toString && !Array.isArray(val) &&
        val.toString() == Number(val)) {
      return new Number(val);
    }
  }

  throw new CastError('number', value, this.path);
};

/*!
 * Module exports.
 */

module.exports = NumberSchema;