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validators.js
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validators.js
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/*
* Geddy JavaScript Web development framework
* Copyright 2112 Matthew Eernisse (mde@fleegix.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
var utils = require('utilities')
, i18n = utils.i18n
, validators = {}
, baseValidators
, createScenarioWrappedValidator;
/*
* Basic validators -- name is the field name, params is the entire params
* collection (needed for stuff like password confirmation so it's possible
* to compare with other field values, and the rule is the data for this
* particular validation
* Rules can look like this:
* present: {opts: {message: 'Gotta be here'}}
* length: {opts: {min: 2, max: 12}}
* withFunction: {reference: function (s) { return true },
* message: 'Something is wrong'}
*/
baseValidators = {
present: function (name, val, params, rule, locale) {
var msg;
if (utils.isEmpty(val)) {
//'Field "' + name + '" is required.';
msg = rule.opts.message || i18n.getText('model.validatesPresent',
{name: name}, locale);
}
return msg;
},
absent: function (name, val, params, rule, locale) {
var msg;
if (val) {
//return rule.opts.message || 'Field "' + name + '" must not be filled in.';
msg = rule.opts.message || i18n.getText('model.validatesAbsent',
{name: name}, locale);
}
return msg;
},
confirmed: function (name, val, params, rule, locale) {
var qual = rule.reference
, msg;
if (val != params[qual]) {
//return rule.opts.message || 'Field "' + name + '" and field "' + qual +
// '" must match.';
msg = rule.opts.message || i18n.getText('model.validatesConfirmed',
{name: name, qual: qual}, locale);
}
return msg;
},
format: function (name, val, params, rule, locale) {
var msg;
if (!rule.reference.test(val)) {
//return rule.opts.message || 'Field "' + name + '" is not correctly formatted.';
msg = rule.opts.message || i18n.getText('model.validatesFormat',
{name: name}, locale);
}
return msg;
},
length: function (name, val, params, rule, locale) {
var qual = rule.opts
, validQualifier = false
, err
, msg
, numVal
, errMsg = 'validatesLength must be set to a integer ' +
'or object with min/max integer properties.';
// If a specific length is wanted, there has to be a value
// in the first place
if (!val) {
return rule.opts.message || i18n.getText('model.validatesPresent', {name: name}, locale);
}
// Validate that there's a opts to check against
if (!qual) {
throw new Error(errMsg);
}
// Check if using old API of passing just a number
if (typeof qual != 'object') {
qual = {is: qual};
}
// First check for an exact length qualifier
numVal = parseFloat(qual.is);
if (!isNaN(numVal)) {
validQualifier = true;
if (val.length !== numVal) {
msg = rule.opts.message || i18n.getText('model.validatesExactLength',
{name: name, is: qual.is}, locale);
}
}
else {
numVal = parseFloat(qual.min);
if (!isNaN(numVal)) {
validQualifier = true;
if (val.length < numVal) {
msg = rule.opts.message || i18n.getText('model.validatesMinLength',
{name: name, min: qual.min}, locale);
}
}
// Still valid, check for a max
if (!msg) {
numVal = parseFloat(qual.max);
if (!isNaN(numVal)) {
validQualifier = true;
if (val.length > numVal) {
msg = rule.opts.message || i18n.getText('model.validatesMaxLength',
{name: name, max: qual.max}, locale);
}
}
}
}
if (!validQualifier) {
throw new Error(errMsg);
}
return msg;
},
withFunction: function (name, val, params, rule, locale) {
var func = rule.reference
, msg;
if (typeof func != 'function') {
throw new Error('withFunction validator for field "' + name +
'" must be a function.');
}
if (!func(val, params)) {
//return rule.opts.message || 'Field "' + name + '" is not valid.';
msg = rule.opts.message || i18n.getText('model.validatesWithFunction',
{name: name}, locale);
}
return msg;
}
};
createScenarioWrappedValidator = function (baseValidator) {
return function (name, val, params, rule, locale) {
var validScenarios = rule.opts && rule.opts.on
, scenario = rule.scenario
, shouldValidate = false;
// By default, we should validate on all scenarios
if (!validScenarios) {
shouldValidate = true;
}
// If the user specified scenarios
if (!shouldValidate) {
// Accept strings too
if (! validScenarios instanceof Array) {
validScenarios = [validScenarios];
}
// Normalize the input
for(var i=0, ii=validScenarios.length; i < ii; i++) {
validScenarios[i] = validScenarios[i].toLowerCase();
}
// Scenario might be undefined here, but don't hide the error as
// we should always validate with a scenario in mind lest something
// unexpected happen.
shouldValidate = validScenarios.indexOf(scenario.toLowerCase()) >= 0;
}
if (shouldValidate) {
return baseValidator(name, val, params, rule, locale);
}
else {
return null;
}
}
};
// Wrap all the base validators in a scenario-aware wrapper
for (var key in baseValidators) {
validators[key] = createScenarioWrappedValidator(baseValidators[key]);
}
module.exports = validators;