Implement UIValidator package

- Remove `AnyValidationRule`
- Get rid of support for older operating systems

Author: ns-vasilev

.swiftpm/xcode/xcshareddata/xcschemes/Validator-Package.xcscheme

@@ -65,13 +65,6 @@
             BlueprintName = "ValidatorCore"
             ReferencedContainer = "container:">
          </BuildableReference>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "ValidatorUI"
-            BuildableName = "ValidatorUI"
-            BlueprintName = "ValidatorUI"
-            ReferencedContainer = "container:">
-         </BuildableReference>
       </CodeCoverageTargets>
       <Testables>
          <TestableReference
@@ -84,6 +77,26 @@
                ReferencedContainer = "container:">
             </BuildableReference>
          </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "ValidatorCoreTests"
+               BuildableName = "ValidatorCoreTests"
+               BlueprintName = "ValidatorCoreTests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "ValidatorUITests"
+               BuildableName = "ValidatorUITests"
+               BlueprintName = "ValidatorUITests"
+               ReferencedContainer = "container:">
+            </BuildableReference>
+         </TestableReference>
       </Testables>
    </TestAction>
    <LaunchAction

Package.swift

@@ -1,15 +1,15 @@
-// swift-tools-version: 5.5
+// swift-tools-version: 5.7
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "Validator",
     platforms: [
-        .iOS(.v13),
-        .macOS(.v10_13),
-        .watchOS(.v7),
-        .tvOS(.v13),
+        .iOS(.v16),
+        .macOS(.v13),
+        .watchOS(.v9),
+        .tvOS(.v16),
     ],
     products: [
         .library(name: "ValidatorCore", targets: ["ValidatorCore"]),
@@ -19,6 +19,7 @@ let package = Package(
     targets: [
         .target(name: "ValidatorCore", dependencies: []),
         .target(name: "ValidatorUI", dependencies: ["ValidatorCore"]),
-        .testTarget(name: "ValidatorTests", dependencies: ["ValidatorCore"]),
+        .testTarget(name: "ValidatorCoreTests", dependencies: ["ValidatorCore"]),
+        .testTarget(name: "ValidatorUITests", dependencies: ["ValidatorCore", "ValidatorUI"]),
     ]
 )

Sources/ValidatorCore/Classes/Extensions/IValidationRule+Erase.swift

@@ -24,7 +24,7 @@ public struct LengthValidationRule: IValidationRule {
 
     // MARK: Initialization
 
-    public init(min: Int, max: Int, error: IValidationError) {
+    public init(min: Int = .zero, max: Int = .max, error: IValidationError) {
         self.min = min
         self.max = max
         self.error = error

Sources/ValidatorCore/Classes/Rules/AnyValidationRule.swift

@@ -15,25 +15,6 @@ public protocol IValidator {
     ///   - rule: The validation rule.
     ///
     /// - Returns: A validation result.
-    func validate<T: IValidationRule>(input: T.Input, rule: T) -> ValidationResult
-
-    /// Validates an input value.
-    ///
-    /// - Parameters:
-    ///   - input: The input value.
-    ///   - rules: The validation rules array.
-    ///
-    /// - Returns: A validation result.
-    func validate<T>(input: T, rules: [AnyValidationRule<T>]) -> ValidationResult
-
-    /// Validates an input value.
-    ///
-    /// - Parameters:
-    ///   - input: The input value.
-    ///   - rule: The validation rule.
-    ///
-    /// - Returns: A validation result.
-    @available(macOS 13.0, iOS 16, tvOS 16, watchOS 9, *)
     func validate<T>(input: T, rule: some IValidationRule<T>) -> ValidationResult
 
     /// Validates an input value.
@@ -43,6 +24,5 @@ public protocol IValidator {
     ///   - rules: The validation rules array.
     ///
     /// - Returns: A validation result.
-    @available(macOS 13.0, iOS 16, tvOS 16, watchOS 9, *)
     func validate<T>(input: T, rules: [any IValidationRule<T>]) -> ValidationResult
 }

Sources/ValidatorCore/Classes/Rules/LengthValidationRule.swift

@@ -14,19 +14,10 @@ public final class Validator {
 // MARK: IValidator
 
 extension Validator: IValidator {
-    public func validate<T>(input: T.Input, rule: T) -> ValidationResult where T: IValidationRule {
-        validate(input: input, rules: [rule.eraseToAnyValidationRule()])
+    public func validate<T>(input: T, rule: some IValidationRule<T>) -> ValidationResult {
+        validate(input: input, rules: [rule])
     }
 
-    public func validate<T>(input: T, rules: [AnyValidationRule<T>]) -> ValidationResult {
-        let errors = rules
-            .filter { !$0.validate(input: input) }
-            .map(\.error)
-
-        return errors.isEmpty ? .valid : ValidationResult.invalid(errors: errors)
-    }
-
-    @available(macOS 13.0, iOS 16, tvOS 16, watchOS 9, *)
     public func validate<T>(input: T, rules: [any IValidationRule<T>]) -> ValidationResult {
         let errors = rules
             .filter { !self.validate(input: input, rule: $0) }
@@ -35,8 +26,7 @@ extension Validator: IValidator {
         return errors.isEmpty ? .valid : ValidationResult.invalid(errors: errors)
     }
 
-    @available(macOS 13.0, iOS 16, tvOS 16, watchOS 9, *)
-    func validate<T>(input: T, rule: some IValidationRule<T>) -> Bool {
+    private func validate<T>(input: T, rule: some IValidationRule<T>) -> Bool {
         rule.validate(input: input)
     }
 }

Sources/ValidatorCore/IValidator.swift

@@ -0,0 +1,29 @@
+//
+// Validator
+// Copyright © 2023 Space Code. All rights reserved.
+//
+
+#if os(iOS)
+    import UIKit
+
+    extension UITextField: IUIValidatable {
+        public var inputValue: String { text ?? "" }
+
+        public typealias Input = String
+
+        public func validateOnInputChange(isEnabled: Bool) {
+            if isEnabled {
+                addTarget(self, action: #selector(textFieldDidChange(_:)), for: .editingChanged)
+            } else {
+                removeTarget(self, action: #selector(textFieldDidChange(_:)), for: .editingChanged)
+            }
+        }
+
+        // MARK: Private
+
+        @objc
+        private func textFieldDidChange(_: UITextField) {
+            validate(rules: validationRules)
+        }
+    }
+#endif

Sources/ValidatorCore/Validator.swift

@@ -0,0 +1,89 @@
+//
+// Validator
+// Copyright © 2023 Space Code. All rights reserved.
+//
+
+// swiftlint:disable prefixed_toplevel_constant
+
+import Foundation
+import ValidatorCore
+
+// MARK: - IUIValidatable
+
+public protocol IUIValidatable: AnyObject {
+    associatedtype Input
+
+    /// The input value.
+    var inputValue: Input { get }
+
+    /// Validates an input value.
+    ///
+    /// - Parameters:
+    ///   - rule: The validation rule.
+    ///
+    /// - Returns: A validation result.
+    func validate<T>(rule: some IValidationRule<T>) -> ValidationResult where T == Input
+
+    /// Validates an input value.
+    ///
+    /// - Parameters:
+    ///   - rules: The validation rules array.
+    ///
+    /// - Returns: A validation result.
+    func validate<T>(rules: [any IValidationRule<T>]) -> ValidationResult where T == Input
+
+    /// Validates an input value.
+    ///
+    /// - Parameter isEnabled: The
+    func validateOnInputChange(isEnabled: Bool)
+}
+
+private var kValidationRules: UInt8 = 0
+private var kValidationHandler: UInt8 = 0
+
+private let validator = Validator()
+
+public extension IUIValidatable {
+    @discardableResult
+    func validate<T>(rule: some IValidationRule<T>) -> ValidationResult where T == Input {
+        let result = validator.validate(input: inputValue, rule: rule)
+        validationHandler?(result)
+        return result
+    }
+
+    @discardableResult
+    func validate<T>(rules: [any IValidationRule<T>]) -> ValidationResult where T == Input {
+        let result = validator.validate(input: inputValue, rules: rules)
+        validationHandler?(result)
+        return result
+    }
+
+    func add<T>(rule: some IValidationRule<T>) where T == Input {
+        validationRules.append(rule)
+    }
+
+    var validationRules: [any IValidationRule<Input>] {
+        get {
+            (objc_getAssociatedObject(self, &kValidationRules) as? AnyObject) as? [any IValidationRule<Input>] ?? []
+        }
+        set {
+            objc_setAssociatedObject(
+                self,
+                &kValidationRules,
+                newValue as [any IValidationRule<Input>],
+                .OBJC_ASSOCIATION_RETAIN_NONATOMIC
+            )
+        }
+    }
+
+    var validationHandler: ((ValidationResult) -> Void)? {
+        get {
+            objc_getAssociatedObject(self, &kValidationHandler) as? ((ValidationResult) -> Void)
+        }
+        set {
+            if let newValue = newValue {
+                objc_setAssociatedObject(self, &kValidationHandler, newValue as AnyObject, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+            }
+        }
+    }
+}