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// `window.ParsleyExtend`, like `ParsleyAbstract`, is inherited by `ParsleyField` and `ParsleyForm`
// That way, we could add new methods or redefine some for these both classes. In particular case
// We are adding async validation methods that returns promises, bind them properly to triggered
// Events like onkeyup when field is invalid or on form submit. These validation methods adds an
// Extra `remote` validator which could not be simply added like other `ParsleyExtra` validators
// Because returns promises instead of booleans.
(function($){
window.ParsleyExtend = window.ParsleyExtend || {};
window.ParsleyExtend = $.extend(true, window.ParsleyExtend, {
asyncSupport: true,
asyncValidators: {
'default': {
fn: function (xhr) {
return 'resolved' === xhr.state();
},
url: false
},
reverse: {
fn: function (xhr) {
// If reverse option is set, a failing ajax request is considered successful
return 'rejected' === xhr.state();
},
url: false
}
},
addAsyncValidator: function (name, fn, url, options) {
this.asyncValidators[name.toLowerCase()] = {
fn: fn,
url: url || false,
options: options || {}
};
return this;
},
asyncValidate: function () {
if ('ParsleyForm' === this.__class__)
return this._asyncValidateForm.apply(this, arguments);
return this._asyncValidateField.apply(this, arguments);
},
asyncIsValid: function () {
if ('ParsleyField' === this.__class__)
return this._asyncIsValidField.apply(this, arguments);
return this._asyncIsValidForm.apply(this, arguments);
},
onSubmitValidate: function (event) {
var that = this;
// This is a Parsley generated submit event, do not validate, do not prevent, simply exit and keep normal behavior
if (true === event.parsley)
return;
// Clone the event object
this.submitEvent = $.extend(true, {}, event);
// Prevent form submit and immediately stop its event propagation
if (event instanceof $.Event) {
event.stopImmediatePropagation();
event.preventDefault();
}
return this._asyncValidateForm(undefined, event)
.done(function () {
// If user do not have prevented the event, re-submit form
if (that._trigger('submit') && !that.submitEvent.isDefaultPrevented())
that.$element.trigger($.extend($.Event('submit'), { parsley: true }));
});
},
eventValidate: function (event) {
// For keyup, keypress, keydown.. events that could be a little bit obstrusive
// do not validate if val length < min threshold on first validation. Once field have been validated once and info
// about success or failure have been displayed, always validate with this trigger to reflect every yalidation change.
if (new RegExp('key').test(event.type))
if (!this._ui.validationInformationVisible && this.getValue().length <= this.options.validationThreshold)
return;
this._ui.validatedOnce = true;
this.asyncValidate();
},
// Returns Promise
_asyncValidateForm: function (group, event) {
var
that = this,
promises = [];
this._refreshFields();
this._trigger('validate');
for (var i = 0; i < this.fields.length; i++) {
// do not validate a field if not the same as given validation group
if (group && group !== this.fields[i].options.group)
continue;
promises.push(this.fields[i]._asyncValidateField());
}
return $.when.apply($, promises)
.done(function () {
that._trigger('success');
})
.fail(function () {
that._trigger('error');
})
.always(function () {
that._trigger('validated');
});
},
_asyncIsValidForm: function (group, force) {
var promises = [];
this._refreshFields();
for (var i = 0; i < this.fields.length; i++) {
// do not validate a field if not the same as given validation group
if (group && group !== this.fields[i].options.group)
continue;
promises.push(this.fields[i]._asyncIsValidField(force));
}
return $.when.apply($, promises);
},
_asyncValidateField: function (force) {
var that = this;
this._trigger('validate');
return this._asyncIsValidField(force)
.done(function () {
that._trigger('success');
})
.fail(function () {
that._trigger('error');
})
.always(function () {
that._trigger('validated');
});
},
_asyncIsValidField: function (force, value) {
var
deferred = $.Deferred(),
remoteConstraintIndex;
// If regular isValid (matching regular constraints) returns `false`, no need to go further
// Directly reject promise, do not run remote validator and save server load
if (false === this.isValid(force, value))
deferred.rejectWith(this);
// If regular constraints are valid, and there is a remote validator registered, run it
else if ('undefined' !== typeof this.constraintsByName.remote)
this._remote(deferred);
// Otherwise all is good, resolve promise
else
deferred.resolveWith(this);
// Return promise
return deferred.promise();
},
_remote: function (deferred) {
var
that = this,
data = {},
ajaxOptions,
csr,
validator = this.options.remoteValidator || (true === this.options.remoteReverse ? 'reverse' : 'default');
validator = validator.toLowerCase();
if ('undefined' === typeof this.asyncValidators[validator])
throw new Error('Calling an undefined async validator: `' + validator + '`');
// Fill data with current value
data[this.$element.attr('name') || this.$element.attr('id')] = this.getValue();
// Merge options passed in from the function with the ones in the attribute
this.options.remoteOptions = $.extend(true, this.options.remoteOptions || {} , this.asyncValidators[validator].options);
// All `$.ajax(options)` could be overridden or extended directly from DOM in `data-parsley-remote-options`
ajaxOptions = $.extend(true, {}, {
url: this.asyncValidators[validator].url || this.options.remote,
data: data,
type: 'GET'
}, this.options.remoteOptions || {});
// Generate store key based on ajax options
csr = $.param(ajaxOptions);
// Initialise querry cache
if ('undefined' === typeof this._remoteCache)
this._remoteCache = {};
// Try to retrieve stored xhr
if (!this._remoteCache[csr]) {
// Prevent multi burst xhr queries
if (this._xhr && 'pending' === this._xhr.state())
this._xhr.abort();
// Make ajax call
this._xhr = $.ajax(ajaxOptions);
// Store remote call result to avoid next calls with exact same parameters
this._remoteCache[csr] = this._xhr;
}
this._remoteCache[csr]
.done(function (data, textStatus, xhr) {
that._handleRemoteResult(validator, xhr, deferred);
})
.fail(function (xhr, status, message) {
// If we aborted the query, do not handle nothing for this value
if ('abort' === status)
return;
that._handleRemoteResult(validator, xhr, deferred);
});
},
_handleRemoteResult: function (validator, xhr, deferred) {
// If true, simply resolve and exit
if ('function' === typeof this.asyncValidators[validator].fn && this.asyncValidators[validator].fn.call(this, xhr)) {
deferred.resolveWith(this);
return;
}
// Else, create a proper remote validation Violation to trigger right UI
this.validationResult = [
new window.ParsleyValidator.Validator.Violation(
this.constraintsByName.remote,
this.getValue(),
null
)
];
deferred.rejectWith(this);
}
});
// Remote validator is just an always true sync validator with lowest (-1) priority possible
// It will be overloaded in `validateThroughValidator()` that will do the heavy async work
// This 'hack' is needed not to mess up too much with error messages and stuff in `ParsleyUI`
window.ParsleyConfig = window.ParsleyConfig || {};
window.ParsleyConfig.validators = window.ParsleyConfig.validators || {};
window.ParsleyConfig.validators.remote = {
fn: function () {
return true;
},
priority: -1
};
window.Parsley.on('form:submit', function () {
this._remoteCache = {};
});
})(jQuery);