113 lines
3.3 KiB
Swift
113 lines
3.3 KiB
Swift
// ===----------------------------------------------------------------------===
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//
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// This source file is part of the DiscogsService open source project
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//
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// Copyright (c) 2026 Röck+Cöde VoF. and the DiscogsService project authors
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// Licensed under Apache license v2.0
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//
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// See LICENSE for license information
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// See CONTRIBUTORS for the list of DiscogsService project authors
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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// ===----------------------------------------------------------------------===
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import Foundation
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/// A validation rule type that checks whether an input is secure or not.
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struct SecureValidationRule: InputValidationRule {
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// MARK: Properties
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/// A representation of the available security input types.
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private let inputType: SecurityInput
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// MARK: Initializers
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/// Initializes this validation rule.
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/// - Parameter inputType: A representation of the available security input types.
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init(inputType: SecurityInput) {
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self.inputType = inputType
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}
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// MARK: Functions
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#if swift(>=6.0)
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func validate(_ input: String?) throws(InputValidationError) -> Bool {
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try validate(input: input)
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}
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#else
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func validate(_ input: String?) throws -> Bool {
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try validate(input: input)
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}
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#endif
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}
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// MARK: - Definitions
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extension InputValidationRule where Self == SecureValidationRule {
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// MARK: Functions
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/// A validation rule that checks whether an input is secure or not.
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/// - Parameter securityInput: A representation of the security input type to validate
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/// - Returns: A validation rule that has been configured and it is ready to use.
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static func secure(_ securityInput: SecurityInput) -> Self {
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.init(inputType: securityInput)
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}
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}
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// MARK: - Enumerations
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/// A representation of all the possible security input types, based on their respective character length expectations.
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enum SecurityInput: Int {
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/// A consumer key is 20 characters long.
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case consumerKey = 20
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/// A consumer secret is 32 characters long.
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case consumerSecret = 32
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/// A user token is 40 characters long.
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case userToken = 40
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}
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// MARK: - Helpers
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private extension SecureValidationRule {
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// MARK: Functions
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/// Validates a given input.
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///
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/// > note: This helper function would not be necessary when support for *Swift 5.10* is discontinued.
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///
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/// - Parameter input: An input to be validated.
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/// - Returns: A flag that indicates whether a given input has been validated or not.
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/// - Throws: An error of type ``InputValidationError`` in case the validation failed.
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func validate(input: String?) throws -> Bool {
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guard let input else {
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return false
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}
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guard input.fullyMatch(
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pattern: .init(format: .Pattern.securityInput, inputType.rawValue)
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) else {
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switch inputType {
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case .consumerKey: throw InputValidationError.inputNotConsumerKey
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case .consumerSecret: throw InputValidationError.inputNotConsumerSecret
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case .userToken: throw InputValidationError.inputNotUserToken
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}
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}
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return true
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}
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}
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// MARK: - Constants
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private extension String.Pattern {
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/// A regular expression pattern that represents security inputs.
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static let securityInput = "^([a-z]|[A-Z]){%d}$"
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}
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