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//
// SDLChoiceCell.m
// SmartDeviceLink
//
// Created by Joel Fischer on 5/21/18.
// Copyright © 2018 Livio. All rights reserved.
//
#import "SDLChoiceCell.h"
#import "SDLArtwork.h"
#import "NSArray+Extensions.h"
NS_ASSUME_NONNULL_BEGIN
@interface SDLChoiceCell()
@property (assign, nonatomic) UInt16 choiceId;
@property (nonatomic, readwrite) NSString *uniqueText;
@end
@implementation SDLChoiceCell
#pragma mark - Object Lifecycle
- (instancetype)initWithText:(NSString *)text {
return [self initWithText:text secondaryText:nil tertiaryText:nil voiceCommands:nil artwork:nil secondaryArtwork:nil];
}
- (instancetype)initWithText:(NSString *)text artwork:(nullable SDLArtwork *)artwork voiceCommands:(nullable NSArray<NSString *> *)voiceCommands {
return [self initWithText:text secondaryText:nil tertiaryText:nil voiceCommands:voiceCommands artwork:artwork secondaryArtwork:nil];
}
- (instancetype)initWithText:(NSString *)text secondaryText:(nullable NSString *)secondaryText tertiaryText:(nullable NSString *)tertiaryText voiceCommands:(nullable NSArray<NSString *> *)voiceCommands artwork:(nullable SDLArtwork *)artwork secondaryArtwork:(nullable SDLArtwork *)secondaryArtwork {
self = [super init];
if (!self) { return nil; }
_text = text;
_secondaryText = secondaryText;
_tertiaryText = tertiaryText;
_voiceCommands = voiceCommands;
_artwork = artwork;
_secondaryArtwork = secondaryArtwork;
_uniqueText = text;
_choiceId = UINT16_MAX;
return self;
}
#pragma mark - Object Equality
// Based on preprocessor defines in https://www.mikeash.com/pyblog/friday-qa-2010-06-18-implementing-equality-and-hashing.html It is necessary to rotate each of our properties because a simple bitwise OR will produce equivalent results if, for example:
// Object 1: self.text = "Hi", self.secondaryText = "Hello"
// Object 2: self.text = "Hello", self.secondaryText = "Hi"
// To avoid this, we need to rotate our hashes
NSUInteger const NSUIntBit = (CHAR_BIT * sizeof(NSUInteger));
NSUInteger NSUIntRotate(NSUInteger val, NSUInteger howMuch) {
return ((((NSUInteger)val) << howMuch) | (((NSUInteger)val) >> (NSUIntBit - howMuch)));
}
- (NSUInteger)hash {
return NSUIntRotate(self.text.hash, NSUIntBit / 2)
^ NSUIntRotate(self.secondaryText.hash, NSUIntBit / 3)
^ NSUIntRotate(self.tertiaryText.hash, NSUIntBit / 4)
^ NSUIntRotate(self.artwork.name.hash, NSUIntBit / 5)
^ NSUIntRotate(self.secondaryArtwork.name.hash, NSUIntBit / 6)
^ NSUIntRotate(self.voiceCommands.dynamicHash, NSUIntBit / 7);
}
- (BOOL)isEqual:(id)object {
if (self == object) { return YES; }
if (![object isMemberOfClass:[self class]]) { return NO; }
return [self isEqualToChoice:(SDLChoiceCell *)object];
}
- (BOOL)isEqualToChoice:(SDLChoiceCell *)choice {
if (choice == nil) { return NO; }
return (self.hash == choice.hash);
}
#pragma mark - Etc.
- (NSString *)description {
return [NSString stringWithFormat:@"SDLChoiceCell: %u-\"%@ - %@ - %@\", artworkNames: %@ - %@, voice commands: %lu, uniqueText: %@", _choiceId, _text, _secondaryText, _tertiaryText, _artwork.name, _secondaryArtwork.name, (unsigned long)_voiceCommands.count, ([_text isEqualToString:_uniqueText] ? @"NO" : _uniqueText)];
}
@end
NS_ASSUME_NONNULL_END
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