94 lines
2.9 KiB
Swift
94 lines
2.9 KiB
Swift
//
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// Validator.swift
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// Pingo
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//
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// Created by Jeff Potter on 11/10/14.
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// Copyright (c) 2015 jpotts18. All rights reserved.
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//
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import Foundation
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import UIKit
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@objc public protocol ValidationDelegate {
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func validationSuccessful()
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func validationFailed(errors: [UITextField:ValidationError])
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}
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public class Validator {
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// dictionary to handle complex view hierarchies like dynamic tableview cells
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public var errors:[UITextField:ValidationError] = [:]
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public var validations:[UITextField:ValidationRule] = [:]
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private var successStyleTransform:((validationRule:ValidationRule)->Void)?
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private var errorStyleTransform:((validationError:ValidationError)->Void)?
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public init(){}
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// MARK: Private functions
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private func clearErrors() {
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self.errors = [:]
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}
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private func validateAllFields() {
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self.clearErrors()
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for field in validations.keys {
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if let currentRule: ValidationRule = validations[field] {
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if var error: ValidationError = currentRule.validateField() {
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errors[field] = error
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// let the user transform the field if they want
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if let transform = self.errorStyleTransform {
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transform(validationError: error)
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}
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} else {
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// No error
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// let the user transform the field if they want
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if let transform = self.successStyleTransform {
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transform(validationRule: currentRule)
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}
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}
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}
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}
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}
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// MARK: Using Keys
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public func styleTransformers(#success:((validationRule:ValidationRule)->Void)?, error:((validationError:ValidationError)->Void)?) {
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self.successStyleTransform = success
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self.errorStyleTransform = error
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}
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public func registerField(textField:UITextField, rules:[Rule]) {
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validations[textField] = ValidationRule(textField: textField, rules: rules, errorLabel: nil)
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}
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public func registerField(textField:UITextField, errorLabel:UILabel, rules:[Rule]) {
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validations[textField] = ValidationRule(textField: textField, rules:rules, errorLabel:errorLabel)
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}
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public func unregisterField(textField:UITextField) {
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validations.removeValueForKey(textField)
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errors.removeValueForKey(textField)
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}
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public func validate(delegate:ValidationDelegate) {
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self.validateAllFields()
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if errors.isEmpty {
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delegate.validationSuccessful()
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} else {
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delegate.validationFailed(errors)
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}
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}
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public func validate(callback:(errors:[UITextField:ValidationError])->Void) -> Void {
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self.validateAllFields()
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callback(errors: errors)
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}
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}
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