77 lines
2.6 KiB
Swift
77 lines
2.6 KiB
Swift
//
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// CheatValidator.swift
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// Delta
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//
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// Created by Riley Testut on 7/27/16.
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// Copyright © 2016 Riley Testut. All rights reserved.
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//
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import Foundation
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import DeltaCore
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extension CheatValidator
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{
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enum Error: LocalizedError
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{
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case invalidCode
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case invalidName
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case invalidGame
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case duplicateName
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case duplicateCode
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case unknownCheatType
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var errorDescription: String? {
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switch self
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{
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case .invalidCode: return NSLocalizedString("The cheat code isn't in the correct format.", comment: "")
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case .invalidName: return NSLocalizedString("The name of this cheat is invalid.", comment: "")
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case .invalidGame: return NSLocalizedString("There is no associated game with this cheat.", comment: "")
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case .duplicateName: return NSLocalizedString("A cheat already exists with this name.", comment: "")
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case .duplicateCode: return NSLocalizedString("A cheat already exists with this code.", comment: "")
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case .unknownCheatType: return NSLocalizedString("Delta does not support this cheat type.", comment: "")
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}
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}
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}
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}
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struct CheatValidator
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{
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let format: CheatFormat
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let managedObjectContext: NSManagedObjectContext
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func validate(_ cheat: Cheat) throws
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{
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let name = cheat.name
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guard !name.isEmpty else { throw Error.invalidName }
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guard let game = cheat.game else { throw Error.invalidGame }
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let code = cheat.code
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// Find all cheats that are for the same game, don't have the same identifier as the current cheat, but have either the same name or code
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let predicate = NSPredicate(format: "%K == %@ AND %K != %@ AND (%K == %@ OR %K == %@)", #keyPath(Cheat.game), game, #keyPath(Cheat.identifier), cheat.identifier, #keyPath(Cheat.code), code, #keyPath(Cheat.name), name)
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let cheats = Cheat.instancesWithPredicate(predicate, inManagedObjectContext: self.managedObjectContext, type: Cheat.self)
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for cheat in cheats
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{
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if cheat.name == name
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{
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throw Error.duplicateName
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}
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else if cheat.code == code
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{
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throw Error.duplicateCode
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}
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}
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// Remove newline characters (code should already be formatted)
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let sanitizedCode = (cheat.code as NSString).replacingOccurrences(of: "\n", with: "")
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if sanitizedCode.count % self.format.format.count != 0
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{
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throw Error.invalidCode
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}
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}
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}
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