60 lines
1.7 KiB
Swift
60 lines
1.7 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: ErrorProtocol
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{
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case invalidCode
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case invalidName
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case duplicateName
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case duplicateCode
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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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guard let name = cheat.name else { throw Error.invalidName }
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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 = Predicate(format: "%K == %@ AND %K != %@ AND (%K == %@ OR %K == %@)", Cheat.Attributes.game.rawValue, cheat.game, Cheat.Attributes.identifier.rawValue, cheat.identifier, Cheat.Attributes.code.rawValue, code, Cheat.Attributes.name.rawValue, 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.characters.count % self.format.format.characters.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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