78 lines
2.1 KiB
Swift
78 lines
2.1 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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/// A validation rule type that checks whether an input is camel-case or not.
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struct CamelCaseValidationRule: InputValidationRule {
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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 == CamelCaseValidationRule {
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// MARK: Constants
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/// A validation rule that checks whether an input is camel-cased or not.
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static var camelCase: Self { .init() }
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}
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// MARK: - Helpers
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private extension CamelCaseValidationRule {
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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 ``InputValidatorError`` 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.camelCase)
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) else {
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throw InputValidationError.inputNotCamelCase
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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 camel-cased inputs.
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static let camelCase = "([A-Z]([a-z]|[0-9])+)+"
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}
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