// Backbone.Validation v0.8.1
//
// Copyright (c) 2011-2013 Thomas Pedersen
// Distributed under MIT License
//
// Documentation and full license available at:
// http://thedersen.com/projects/backbone-validation
Backbone.Validation = (function(_){
'use strict';
// Default options
// ---------------
var defaultOptions = {
forceUpdate: false,
selector: 'name',
labelFormatter: 'sentenceCase',
valid: Function.prototype,
invalid: Function.prototype
};
// Helper functions
// ----------------
// Formatting functions used for formatting error messages
var formatFunctions = {
// Uses the configured label formatter to format the attribute name
// to make it more readable for the user
formatLabel: function(attrName, model) {
return defaultLabelFormatters[defaultOptions.labelFormatter](attrName, model);
},
// Replaces nummeric placeholders like {0} in a string with arguments
// passed to the function
format: function() {
var args = Array.prototype.slice.call(arguments),
text = args.shift();
return text.replace(/\{(\d+)\}/g, function(match, number) {
return typeof args[number] !== 'undefined' ? args[number] : match;
});
}
};
// Flattens an object
// eg:
//
// var o = {
// address: {
// street: 'Street',
// zip: 1234
// }
// };
//
// becomes:
//
// var o = {
// 'address.street': 'Street',
// 'address.zip': 1234
// };
var flatten = function (obj, into, prefix) {
into = into || {};
prefix = prefix || '';
_.each(obj, function(val, key) {
if(obj.hasOwnProperty(key)) {
if (val && typeof val === 'object' && !(
val instanceof Array ||
val instanceof Date ||
val instanceof RegExp ||
val instanceof Backbone.Model ||
val instanceof Backbone.Collection)
) {
flatten(val, into, prefix + key + '.');
}
else {
into[prefix + key] = val;
}
}
});
return into;
};
// Validation
// ----------
var Validation = (function(){
// Returns an object with undefined properties for all
// attributes on the model that has defined one or more
// validation rules.
var getValidatedAttrs = function(model) {
return _.reduce(_.keys(model.validation || {}), function(memo, key) {
memo[key] = void 0;
return memo;
}, {});
};
// Looks on the model for validations for a specified
// attribute. Returns an array of any validators defined,
// or an empty array if none is defined.
var getValidators = function(model, attr) {
var attrValidationSet = model.validation ? model.validation[attr] || {} : {};
// If the validator is a function or a string, wrap it in a function validator
if (_.isFunction(attrValidationSet) || _.isString(attrValidationSet)) {
attrValidationSet = {
fn: attrValidationSet
};
}
// Stick the validator object into an array
if(!_.isArray(attrValidationSet)) {
attrValidationSet = [attrValidationSet];
}
// Reduces the array of validators into a new array with objects
// with a validation method to call, the value to validate against
// and the specified error message, if any
return _.reduce(attrValidationSet, function(memo, attrValidation) {
_.each(_.without(_.keys(attrValidation), 'msg'), function(validator) {
memo.push({
fn: defaultValidators[validator],
val: attrValidation[validator],
msg: attrValidation.msg
});
});
return memo;
}, []);
};
// Validates an attribute against all validators defined
// for that attribute. If one or more errors are found,
// the first error message is returned.
// If the attribute is valid, an empty string is returned.
var validateAttr = function(model, attr, value, computed) {
// Reduces the array of validators to an error message by
// applying all the validators and returning the first error
// message, if any.
return _.reduce(getValidators(model, attr), function(memo, validator){
// Pass the format functions plus the default
// validators as the context to the validator
var ctx = _.extend({}, formatFunctions, defaultValidators),
result = validator.fn.call(ctx, value, attr, validator.val, model, computed);
if(result === false || memo === false) {
return false;
}
if (result && !memo) {
return validator.msg || result;
}
return memo;
}, '');
};
// Loops through the model's attributes and validates them all.
// Returns and object containing names of invalid attributes
// as well as error messages.
var validateModel = function(model, attrs) {
var error,
invalidAttrs = {},
isValid = true,
computed = _.clone(attrs),
flattened = flatten(attrs);
_.each(flattened, function(val, attr) {
error = validateAttr(model, attr, val, computed);
if (error) {
invalidAttrs[attr] = error;
isValid = false;
}
});
return {
invalidAttrs: invalidAttrs,
isValid: isValid
};
};
// Contains the methods that are mixed in on the model when binding
var mixin = function(view, options) {
return {
// Check whether or not a value passes validation
// without updating the model
preValidate: function(attr, value) {
return validateAttr(this, attr, value, _.extend({}, this.attributes));
},
// Check to see if an attribute, an array of attributes or the
// entire model is valid. Passing true will force a validation
// of the model.
isValid: function(option) {
var flattened = flatten(this.attributes);
if(_.isString(option)){
return !validateAttr(this, option, flattened[option], _.extend({}, this.attributes));
}
if(_.isArray(option)){
return _.reduce(option, function(memo, attr) {
return memo && !validateAttr(this, attr, flattened[attr], _.extend({}, this.attributes));
}, true, this);
}
if(option === true) {
this.validate();
}
return this.validation ? this._isValid : true;
},
// This is called by Backbone when it needs to perform validation.
// You can call it manually without any parameters to validate the
// entire model.
validate: function(attrs, setOptions){
var model = this,
validateAll = !attrs,
opt = _.extend({}, options, setOptions),
validatedAttrs = getValidatedAttrs(model),
allAttrs = _.extend({}, validatedAttrs, model.attributes, attrs),
changedAttrs = flatten(attrs || allAttrs),
result = validateModel(model, allAttrs);
model._isValid = result.isValid;
// After validation is performed, loop through all changed attributes
// and call the valid callbacks so the view is updated.
_.each(validatedAttrs, function(val, attr){
var invalid = result.invalidAttrs.hasOwnProperty(attr);
if(!invalid){
opt.valid(view, attr, opt.selector);
}
});
// After validation is performed, loop through all changed attributes
// and call the invalid callback so the view is updated.
_.each(validatedAttrs, function(val, attr){
var invalid = result.invalidAttrs.hasOwnProperty(attr),
changed = changedAttrs.hasOwnProperty(attr);
if(invalid && (changed || validateAll)){
opt.invalid(view, attr, result.invalidAttrs[attr], opt.selector);
}
});
// Trigger validated events.
// Need to defer this so the model is actually updated before
// the event is triggered.
_.defer(function() {
model.trigger('validated', model._isValid, model, result.invalidAttrs);
model.trigger('validated:' + (model._isValid ? 'valid' : 'invalid'), model, result.invalidAttrs);
});
// Return any error messages to Backbone, unless the forceUpdate flag is set.
// Then we do not return anything and fools Backbone to believe the validation was
// a success. That way Backbone will update the model regardless.
if (!opt.forceUpdate && _.intersection(_.keys(result.invalidAttrs), _.keys(changedAttrs)).length > 0) {
return result.invalidAttrs;
}
}
};
};
// Helper to mix in validation on a model
var bindModel = function(view, model, options) {
_.extend(model, mixin(view, options));
};
// Removes the methods added to a model
var unbindModel = function(model) {
delete model.validate;
delete model.preValidate;
delete model.isValid;
};
// Mix in validation on a model whenever a model is
// added to a collection
var collectionAdd = function(model) {
bindModel(this.view, model, this.options);
};
// Remove validation from a model whenever a model is
// removed from a collection
var collectionRemove = function(model) {
unbindModel(model);
};
// Returns the public methods on Backbone.Validation
return {
// Current version of the library
version: '0.8.1',
// Called to configure the default options
configure: function(options) {
_.extend(defaultOptions, options);
},
// Hooks up validation on a view with a model
// or collection
bind: function(view, options) {
var model = view.model,
collection = view.collection;
options = _.extend({}, defaultOptions, defaultCallbacks, options);
if(typeof model === 'undefined' && typeof collection === 'undefined'){
throw 'Before you execute the binding your view must have a model or a collection.\n' +
'See http://thedersen.com/projects/backbone-validation/#using-form-model-validation for more information.';
}
if(model) {
bindModel(view, model, options);
}
else if(collection) {
collection.each(function(model){
bindModel(view, model, options);
});
collection.bind('add', collectionAdd, {view: view, options: options});
collection.bind('remove', collectionRemove);
}
},
// Removes validation from a view with a model
// or collection
unbind: function(view) {
var model = view.model,
collection = view.collection;
if(model) {
unbindModel(view.model);
}
if(collection) {
collection.each(function(model){
unbindModel(model);
});
collection.unbind('add', collectionAdd);
collection.unbind('remove', collectionRemove);
}
},
// Used to extend the Backbone.Model.prototype
// with validation
mixin: mixin(null, defaultOptions)
};
}());
// Callbacks
// ---------
var defaultCallbacks = Validation.callbacks = {
// Gets called when a previously invalid field in the
// view becomes valid. Removes any error message.
// Should be overridden with custom functionality.
valid: function(view, attr, selector) {
view.$('[' + selector + '~="' + attr + '"]')
.removeClass('invalid')
.removeAttr('data-error');
},
// Gets called when a field in the view becomes invalid.
// Adds a error message.
// Should be overridden with custom functionality.
invalid: function(view, attr, error, selector) {
view.$('[' + selector + '~="' + attr + '"]')
.addClass('invalid')
.attr('data-error', error);
}
};
// Patterns
// --------
var defaultPatterns = Validation.patterns = {
// Matches any digit(s) (i.e. 0-9)
digits: /^\d+$/,
// Matched any number (e.g. 100.000)
number: /^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$/,
// Matches a valid email address (e.g. mail@example.com)
email: /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i,
// Mathes any valid url (e.g. http://www.xample.com)
url: /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i
};
// Error messages
// --------------
// Error message for the build in validators.
// {x} gets swapped out with arguments form the validator.
var defaultMessages = Validation.messages = {
required: '{0} is required',
acceptance: '{0} must be accepted',
min: '{0} must be greater than or equal to {1}',
max: '{0} must be less than or equal to {1}',
range: '{0} must be between {1} and {2}',
length: '{0} must be {1} characters',
minLength: '{0} must be at least {1} characters',
maxLength: '{0} must be at most {1} characters',
rangeLength: '{0} must be between {1} and {2} characters',
oneOf: '{0} must be one of: {1}',
equalTo: '{0} must be the same as {1}',
pattern: '{0} must be a valid {1}'
};
// Label formatters
// ----------------
// Label formatters are used to convert the attribute name
// to a more human friendly label when using the built in
// error messages.
// Configure which one to use with a call to
//
// Backbone.Validation.configure({
// labelFormatter: 'label'
// });
var defaultLabelFormatters = Validation.labelFormatters = {
// Returns the attribute name with applying any formatting
none: function(attrName) {
return attrName;
},
// Converts attributeName or attribute_name to Attribute name
sentenceCase: function(attrName) {
return attrName.replace(/(?:^\w|[A-Z]|\b\w)/g, function(match, index) {
return index === 0 ? match.toUpperCase() : ' ' + match.toLowerCase();
}).replace(/_/g, ' ');
},
// Looks for a label configured on the model and returns it
//
// var Model = Backbone.Model.extend({
// validation: {
// someAttribute: {
// required: true
// }
// },
//
// labels: {
// someAttribute: 'Custom label'
// }
// });
label: function(attrName, model) {
return (model.labels && model.labels[attrName]) || defaultLabelFormatters.sentenceCase(attrName, model);
}
};
// Built in validators
// -------------------
var defaultValidators = Validation.validators = (function(){
// Use native trim when defined
var trim = String.prototype.trim ?
function(text) {
return text === null ? '' : String.prototype.trim.call(text);
} :
function(text) {
var trimLeft = /^\s+/,
trimRight = /\s+$/;
return text === null ? '' : text.toString().replace(trimLeft, '').replace(trimRight, '');
};
// Determines whether or not a value is a number
var isNumber = function(value){
return _.isNumber(value) || (_.isString(value) && value.match(defaultPatterns.number));
};
// Determines whether or not a value is empty
var hasValue = function(value) {
return !(_.isNull(value) || _.isUndefined(value) || (_.isString(value) && trim(value) === '') || (_.isArray(value) && _.isEmpty(value)));
};
return {
// Function validator
// Lets you implement a custom function used for validation
fn: function(value, attr, fn, model, computed) {
if(_.isString(fn)){
fn = model[fn];
}
return fn.call(model, value, attr, computed);
},
// Required validator
// Validates if the attribute is required or not
required: function(value, attr, required, model, computed) {
var isRequired = _.isFunction(required) ? required.call(model, value, attr, computed) : required;
if(!isRequired && !hasValue(value)) {
return false; // overrides all other validators
}
if (isRequired && !hasValue(value)) {
return this.format(defaultMessages.required, this.formatLabel(attr, model));
}
},
// Acceptance validator
// Validates that something has to be accepted, e.g. terms of use
// `true` or 'true' are valid
acceptance: function(value, attr, accept, model) {
if(value !== 'true' && (!_.isBoolean(value) || value === false)) {
return this.format(defaultMessages.acceptance, this.formatLabel(attr, model));
}
},
// Min validator
// Validates that the value has to be a number and equal to or greater than
// the min value specified
min: function(value, attr, minValue, model) {
if (!isNumber(value) || value < minValue) {
return this.format(defaultMessages.min, this.formatLabel(attr, model), minValue);
}
},
// Max validator
// Validates that the value has to be a number and equal to or less than
// the max value specified
max: function(value, attr, maxValue, model) {
if (!isNumber(value) || value > maxValue) {
return this.format(defaultMessages.max, this.formatLabel(attr, model), maxValue);
}
},
// Range validator
// Validates that the value has to be a number and equal to or between
// the two numbers specified
range: function(value, attr, range, model) {
if(!isNumber(value) || value < range[0] || value > range[1]) {
return this.format(defaultMessages.range, this.formatLabel(attr, model), range[0], range[1]);
}
},
// Length validator
// Validates that the value has to be a string with length equal to
// the length value specified
length: function(value, attr, length, model) {
if (!hasValue(value) || trim(value).length !== length) {
return this.format(defaultMessages.length, this.formatLabel(attr, model), length);
}
},
// Min length validator
// Validates that the value has to be a string with length equal to or greater than
// the min length value specified
minLength: function(value, attr, minLength, model) {
if (!hasValue(value) || trim(value).length < minLength) {
return this.format(defaultMessages.minLength, this.formatLabel(attr, model), minLength);
}
},
// Max length validator
// Validates that the value has to be a string with length equal to or less than
// the max length value specified
maxLength: function(value, attr, maxLength, model) {
if (!hasValue(value) || trim(value).length > maxLength) {
return this.format(defaultMessages.maxLength, this.formatLabel(attr, model), maxLength);
}
},
// Range length validator
// Validates that the value has to be a string and equal to or between
// the two numbers specified
rangeLength: function(value, attr, range, model) {
if(!hasValue(value) || trim(value).length < range[0] || trim(value).length > range[1]) {
return this.format(defaultMessages.rangeLength, this.formatLabel(attr, model), range[0], range[1]);
}
},
// One of validator
// Validates that the value has to be equal to one of the elements in
// the specified array. Case sensitive matching
oneOf: function(value, attr, values, model) {
if(!_.include(values, value)){
return this.format(defaultMessages.oneOf, this.formatLabel(attr, model), values.join(', '));
}
},
// Equal to validator
// Validates that the value has to be equal to the value of the attribute
// with the name specified
equalTo: function(value, attr, equalTo, model, computed) {
if(value !== computed[equalTo]) {
return this.format(defaultMessages.equalTo, this.formatLabel(attr, model), this.formatLabel(equalTo, model));
}
},
// Pattern validator
// Validates that the value has to match the pattern specified.
// Can be a regular expression or the name of one of the built in patterns
pattern: function(value, attr, pattern, model) {
if (!hasValue(value) || !value.toString().match(defaultPatterns[pattern] || pattern)) {
return this.format(defaultMessages.pattern, this.formatLabel(attr, model), pattern);
}
}
};
}());
return Validation;
}(_));