BSAuthor.h

//
//  BSAuthor.h
//  BookstoreApp
//
//  Created by Nathan Wood on 17/06/2014.
//  Copyright (c) 2014 Nathan Wood. All rights reserved.
//

#import <Foundation/Foundation.h>

@class BSBook;

@interface BSAuthor : NSObject

- (instancetype)initWithName:(NSString *)name;

@property (nonatomic, copy) NSString *name;

@property (nonatomic, copy, readonly) NSArray *books;

- (void)addBook:(BSBook *)book;

@end

BSAuthor.m

//
//  BSAuthor.m
//  BookstoreApp
//
//  Created by Nathan Wood on 17/06/2014.
//  Copyright (c) 2014 Nathan Wood. All rights reserved.
//

#import "BSAuthor.h"

@interface BSAuthor ()

@property (nonatomic, copy, readwrite) NSArray *books;

@end

@implementation BSAuthor

- (instancetype)initWithName:(NSString *)name
{
    self = [super init];
    if (self)
    {
        self.name = name;
        self.books = [[NSArray alloc] init];
    }
    return self;
}

- (void)addBook:(BSBook *)book
{
    self.books = [self.books arrayByAddingObject:book];
}

@end

BSBook.h

//
//  BSBook.h
//  BookstoreApp
//
//  Created by Nathan Wood on 17/06/2014.
//  Copyright (c) 2014 Nathan Wood. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface BSBook : NSObject

+ (instancetype)bookWithTitle:(NSString *)title price:(float)price;

- (instancetype)initWithTitle:(NSString *)title price:(float)price;

@property (nonatomic, copy) NSString *title;
@property (nonatomic, assign) float price;

@property (nonatomic, strong) UIImage *image;

@end

BSBook.m

//
//  BSBook.m
//  BookstoreApp
//
//  Created by Nathan Wood on 17/06/2014.
//  Copyright (c) 2014 Nathan Wood. All rights reserved.
//

#import "BSBook.h"

@implementation BSBook

+ (instancetype)bookWithTitle:(NSString *)title price:(float)price
{
    return [[self alloc] initWithTitle:title price:price];
}

- (instancetype)initWithTitle:(NSString *)title price:(float)price
{
    self = [super init];
    if (self)
    {
        self.title = title;
        self.price = price;
    }
    return self;
}

@end

BSBookStore.h

//
//  BSBookStore.h
//  BookstoreApp
//
//  Created by Nathan Wood on 17/06/2014.
//  Copyright (c) 2014 Nathan Wood. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "BSAuthor.h"
#import "BSBook.h"

@class BSAuthor;

@interface BSBookStore : NSObject

- (instancetype)initWithTitle:(NSString *)title;

@property (nonatomic, copy) NSString *title;

@property (nonatomic, copy, readonly) NSArray *authors;

- (void)addAuthor:(BSAuthor *)author;

- (void)populate;

@end

BSBookStore.m

//
//  BSBookStore.m
//  BookstoreApp
//
//  Created by Nathan Wood on 17/06/2014.
//  Copyright (c) 2014 Nathan Wood. All rights reserved.
//

#import "BSBookStore.h"

@interface BSBookStore ()

@property (nonatomic, copy, readwrite) NSArray *authors;

@end

@implementation BSBookStore

- (instancetype)init
{
    return [self initWithTitle:@"My Book Store"];
}

- (instancetype)initWithTitle:(NSString *)title
{
    self = [super init];
    if (self)
    {
        self.title = title;
        self.authors = [[NSArray alloc] init];
    }
    return self;
}

- (void)addAuthor:(BSAuthor *)author
{
    self.authors = [self.authors arrayByAddingObject:author];
}

- (void)populate
{
    BSAuthor *rowling = [[BSAuthor alloc] initWithName:@"J.K. Rowling"];
    BSAuthor *martin = [[BSAuthor alloc] initWithName:@"George R.R. Martin"];
    BSAuthor *collins = [[BSAuthor alloc] initWithName:@"Suzanne Collins"];
    
    [rowling addBook:[BSBook bookWithTitle:@"The Philosopher's Stone" price:6.59]];
    [rowling addBook:[BSBook bookWithTitle:@"The Chamber of Secrets" price:6.64]];
    [rowling addBook:[BSBook bookWithTitle:@"The Prisoner of Azkaban" price:6.88]];
    
    [martin addBook:[BSBook bookWithTitle:@"A Game of Thrones" price:6.02]];
    [martin addBook:[BSBook bookWithTitle:@"A Dance with Dragons" price:6.02]];
    [martin addBook:[BSBook bookWithTitle:@"A Feast for Crows" price:6.02]];
    
    BSBook *hungerGames = [BSBook bookWithTitle:@"The Hunger Games" price:6.22];
    hungerGames.image = [UIImage imageNamed:@"hunger.jpeg"];
    
    [collins addBook:hungerGames];
    [collins addBook:[BSBook bookWithTitle:@"Catching Fire" price:7.32]];
    [collins addBook:[BSBook bookWithTitle:@"Mockingjay" price:8.06]];
    
    
    // Add the authors to our store
    [self addAuthor:rowling];
    [self addAuthor:martin];
    [self addAuthor:collins];
}

@end