ko.validatedObservable = function()

in google-cloud-server/src/main/resources/buildServerResources/knockout.validation-2.0.3.js [1477:1512]

• 26 lines of code
• 6 McCabe index (conditional complexity)

ko.validatedObservable = function (initialValue, options) {
	if (!options && !kv.utils.isObject(initialValue)) {
		return ko.observable(initialValue).extend({ validatable: true });
	}

	var obsv = ko.observable(initialValue);
	obsv.errors = kv.group(kv.utils.isObject(initialValue) ? initialValue : {}, options);
	obsv.isValid = ko.observable(obsv.errors().length === 0);

	if (ko.isObservable(obsv.errors)) {
		obsv.errors.subscribe(function(errors) {
			obsv.isValid(errors.length === 0);
		});
	}
	else {
		ko.computed(obsv.errors).subscribe(function (errors) {
			obsv.isValid(errors.length === 0);
		});
	}

	obsv.subscribe(function(newValue) {
		if (!kv.utils.isObject(newValue)) {
			/*
			 * The validation group works on objects.
			 * Since the new value is a primitive (scalar, null or undefined) we need
			 * to create an empty object to pass along.
			 */
			newValue = {};
		}
		// Force the group to refresh
		obsv.errors._updateState(newValue);
		obsv.isValid(obsv.errors().length === 0);
	});

	return obsv;
};