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| /**
* Handles validation on a model
*
* Uses Offshore-validator for validating
* https://github.com/Atlantis-Software/offshore-validator
*/
var _ = require('lodash');
var validator = require('offshore-validator');
var async = require('async');
var utils = require('../utils/helpers');
var hasOwnProperty = utils.object.hasOwnProperty;
var WLValidationError = require('../error/WLValidationError');
var offshoreCriteria = require('offshore-criteria');
var associationValidator = require('./associationValidations');
var normalize = require('../utils/normalize');
/**
* Build up validations using the Offshore-validator module.
*
* @param {String} adapter
*/
var Validator = module.exports = function(context) {
this.validations = {};
this.associations = {};
this.context = context;
};
/**
* Builds a Validation Object from a normalized attributes
* object.
*
* Loops through an attributes object to build a validation object
* containing attribute name as key and a series of validations that
* are run on each model. Skips over type and defaultsTo as they are
* schema properties.
*
* Example:
*
* attributes: {
* name: {
* type: 'string',
* length: { min: 2, max: 5 }
* }
* email: {
* type: 'string',
* required: true
* }
* }
*
* Returns: {
* name: { length: { min:2, max: 5 }},
* email: { required: true }
* }
*/
Validator.prototype.initialize = function(attrs, types, defaults, criteria) {
var self = this;
defaults = defaults || {};
// These properties are reserved and may not be used as validations
this.reservedProperties = [
'criteria',
'defaultsTo',
'primaryKey',
'autoIncrement',
'unique',
'index',
'collection',
'dominant',
'through',
'columnName',
'foreignKey',
'references',
'on',
'groupKey',
'model',
'via',
'size',
'example',
'validationMessage',
'validations',
'populateSettings',
'onKey',
'protected',
'meta'
];
if (defaults.ignoreProperties && Array.isArray(defaults.ignoreProperties)) {
this.reservedProperties = this.reservedProperties.concat(defaults.ignoreProperties);
}
//this.criteria = criteria;
this.criteria = normalize.criteria(criteria);
this.defaults = {};
if (criteria) {
_.keys(this.criteria.where).forEach(function(key) {
Eif (attrs[key]) {
var type = attrs[key].type || attrs[key];
var val = self.criteria.where[key];
Iif (_.isPlainObject(val) && type !== 'json') {
return;
}
Iif (_.isArray(val) && type !== 'array') {
return;
}
self.defaults[key] = val;
}
});
}
// Add custom type definitions to validator
types = types || {};
validator.define(types);
Object.keys(attrs).forEach(function(attr) {
self.validations[attr] = {};
Object.keys(attrs[attr]).forEach(function(prop) {
// Ignore null values
Iif (attrs[attr][prop] === null) { return; }
if ((prop === 'collection') || (prop === 'model')) {
self.associations[attr] = new associationValidator(self.context);
}
// If property is reserved don't do anything with it
if (self.reservedProperties.indexOf(prop) > -1) { return; }
// use the Offshore-validator `in` method for enums
if (prop === 'enum') {
self.validations[attr]['in'] = attrs[attr][prop];
return;
}
self.validations[attr][prop] = attrs[attr][prop];
});
});
};
/**
* Validator.prototype.validate()
*
* Accepts a dictionary of values and validates them against
* the validation rules expected by this schema (`this.validations`).
* Validation is performed using Anchor.
*
*
* @param {Dictionary} values
* The dictionary of values to validate.
*
* @param {Boolean|String|String[]} presentOnly
* only validate present values (if `true`) or validate the
* specified attribute(s).
*
* @param {Function} callback
* @param {Error} err - a fatal error, if relevant.
* @param {Array} invalidAttributes - an array of errors
*/
Validator.prototype.validate = function(values, presentOnly, cb) {
var self = this;
var errors = {};
var validations = Object.keys(this.validations);
var associations = Object.keys(this.associations);
// Handle optional second arg AND Use present values only, specified values, or all validations
var type = Array.isArray(presentOnly) ? 'array' : typeof presentOnly;
//affecting default values specified in the model criteria to the record to insert if they don't exist
values = _.defaults(values, self.defaults);
switch (type) {
case 'function':
cb = presentOnly;
break;
case 'string':
validations = [presentOnly];
break;
case 'array':
validations = presentOnly;
break;
default:
// Any other truthy value.
if (presentOnly) {
validations = _.intersection(validations, Object.keys(values));
}
}
// Validate all validations in parallel
async.each(validations, function _eachValidation(validation, cb) {
var curValidation = self.validations[validation];
// Build Requirements
var requirements;
try {
requirements = validator(curValidation);
}
catch (e) {
// Handle fatal error:
return cb(e);
}
// Grab value and set to null if undefined
var value = _.isUndefined(values[validation]) ? null : values[validation];
// If value is not required and empty then don't
// try and validate it
if (!curValidation.required) {
if (value === null || value === '') {
return cb();
}
}
// If Boolean and required manually check
if (curValidation.required && curValidation.type === 'boolean' && (typeof value !== 'undefined' && value !== null)) {
Eif (value.toString() === 'true' || value.toString() === 'false') {
return cb();
}
}
// If type is integer and the value matches a mongoID let it validate
if (hasOwnProperty(self.validations[validation], 'type') && self.validations[validation].type === 'integer') {
Iif (utils.matchMongoId(value)) {
return cb();
}
}
// Rule values may be specified as sync or async functions.
// Call them and replace the rule value with the function's result
// before running validations.
async.each(Object.keys(requirements.data), function _eachKey(key, next) {
try {
if (typeof requirements.data[key] !== 'function') {
return next();
}
// Run synchronous function
if (requirements.data[key].length < 1) {
requirements.data[key] = requirements.data[key].apply(values, []);
return next();
}
// Run async function
requirements.data[key].call(values, function(result) {
requirements.data[key] = result;
next();
});
}
catch (e) {
return next(e);
}
}, function afterwards(unexpectedErr) {
Iif (unexpectedErr) {
// Handle fatal error
return cb(unexpectedErr);
}
// If the value has a dynamic required function and it evaluates to false lets look and see
// if the value supplied is null or undefined. If so then we don't need to check anything. This
// prevents type errors like `undefined` should be a string.
// if required is set to 'false', don't enforce as required rule
if (requirements.data.hasOwnProperty('required') && !requirements.data.required) {
Iif (_.isNull(value)) {
return cb();
}
}
// Now run the validations using Offshore-validator.
var validationError;
try {
validationError = validator(value).to(requirements.data, values);
}
catch (e) {
return cb(e);
}
// If no validation errors, bail.
if (!validationError) {
return cb();
}
// Build an array of errors.
errors[validation] = [];
validationError.forEach(function(obj) {
Iif (obj.property) {
delete obj.property;
}
errors[validation].push({ rule: obj.rule, message: obj.message });
});
return cb();
});
}, function allValidationsChecked(err) {
// Handle fatal error:
if (err) {
return cb(err);
}
if (Object.keys(errors).length !== 0) {
return cb(null, errors);
}
// validate criteria of the model
if (!offshoreCriteria([values], {where: self.criteria ? self.criteria.where : void 0}).results[0]) {
errors.Criteria = [{rule: 'criteria', message: 'Object :\n' + require('util').inspect(values) + ' does not respect criteria defined in the model.'}];
return cb(null, errors);
}
// validate association's criteria
async.each(associations, function(association, next) {
var associationValues = values[association] || [];
if (!_.isArray(associationValues)) {
associationValues = [associationValues];
}
async.each(associationValues, function(value, next) {
self.associations[association].validate(value, false, next);
}, next);
}, cb);
});
};
|