DeliData.h

#import <Foundation/Foundation.h>


typedef NS_ENUM(NSInteger, DeliDay) {
    DeliDaySunday=0,
    DeliDayMonday=1,
    DeliDayTuesday=2,
    DeliDayWednesday=3,
    DeliDayThursday=4,
    DeliDayFriday=5,
    DeliDaySaturday=6,
    DeliDayUnknown=-1
};




@interface DeliData : NSObject


-(id)init:(NSData *)menuData;

-(NSArray *) itemsForMeal:(NSString *)meal onDay:(DeliDay)day atCounter:(NSString *)counter ;
-(NSArray *) mealsForDay:(DeliDay)day;
-(NSArray *) countersForMeal:(NSString *)meal onDay:(DeliDay)day;

+(DeliDay)deliDayForString:(NSString *)dayString;
+(NSString *)stringForDeliDay:(DeliDay)day;

@end

DeliData.m

#import "DeliData.h"
#import "TFHpple.h"
#import "Item.h"

@interface DeliData ()

@property (strong,nonatomic) NSMutableArray *menuData;
@property (strong,nonatomic) NSMutableArray *dayMeals;

@end

@implementation DeliData


static NSArray *dayStrings=nil;
static dispatch_once_t onceToken;

-(id)init {
    if (self=[super init]) {
        [self populateMenuArray];
        
    }
    return self;
}

-(id)init:(NSData *)menuData {
    if (self=[super init]) {
        [self populateMenuArray];
        [self parseXML:menuData];
        
    }
    
    return self;
}

-(void)populateMenuArray {

    self.menuData=[NSMutableArray arrayWithCapacity:7];
    self.dayMeals=[NSMutableArray arrayWithCapacity:7];
    for (int i=0;i<7;i++) {
        [self.menuData addObject:[NSMutableDictionary new]];
        [self.dayMeals addObject:[NSMutableArray new]];
    }
}

-(void)parseXML:(NSData *)menuData {
    TFHpple *Parser = [TFHpple hppleWithXMLData:menuData];
    NSString *XpathQueryString = @"//day";
    
    NSArray *Nodes = [Parser searchWithXPathQuery:XpathQueryString];
    
    for (TFHppleElement *element in Nodes) {
        
        NSString *dayString=element.attributes[@"name"];
        
        DeliDay day=[DeliData deliDayForString:dayString];
        
        if (day != DeliDayUnknown) {
            NSMutableDictionary *dayDict=(NSMutableDictionary *)self.menuData[day];
            NSMutableArray *dayMeals=self.dayMeals[day];
            NSArray *mealsArray=[element childrenWithTagName:@"meal"];
            for (TFHppleElement *mealElement in mealsArray) {
                NSString *mealName=mealElement.attributes[@"name"];
                [dayMeals addObject:mealName];
                NSMutableDictionary *counterDict=(NSMutableDictionary *)dayDict[mealName];
                if (counterDict == nil) {
                    counterDict=[NSMutableDictionary new];
                    dayDict[mealName]=counterDict;
                }
                NSArray *countersArray=[mealElement childrenWithTagName:@"counter"];
                for (TFHppleElement *counterElement in countersArray) {
                    NSString *counterName=counterElement.attributes[@"name"];
                    if (counterName!=nil) {
                        NSMutableArray *itemsArray=(NSMutableArray *)counterDict[counterName];
                        if (itemsArray == nil) {
                            itemsArray=[NSMutableArray new];
                            counterDict[counterName]=itemsArray;
                        }
                        NSArray *dishArray=[counterElement childrenWithTagName:@"dish"];
                        for (TFHppleElement *dishElement in dishArray) {
                            Item *newItem=[Item new];
                            TFHppleElement *dishNameElement=[dishElement firstChildWithTagName:@"name"];
                            NSString *text=[[dishNameElement firstTextChild].content stringByReplacingOccurrencesOfString:@"\n" withString:@""];
                            newItem.title=text;
                            TFHppleElement *dishUrlElement=[dishElement firstChildWithTagName:@"url"];
                            text=[[dishUrlElement firstTextChild].content stringByReplacingOccurrencesOfString:@"\n" withString:@""];
                            newItem.url=text;
                            [itemsArray addObject:newItem];
                        }
                    }
                }
            }
        }
        else {
            NSLog(@"Invalid day name %@",dayString);
        }
    }

}

+(void)setupDayStrings {
    dispatch_once(&onceToken, ^{
        dayStrings = @[@"Sunday",@"Monday",@"Tuesday",@"Wednesday",@"Thursday",@"Friday",@"Saturday"];;
    });
}

#pragma mark - Public methods

-(NSArray *) mealsForDay:(DeliDay)day {
    
    return self.dayMeals[day];
    
}

-(NSArray *) countersForMeal:(NSString *)meal onDay:(DeliDay)day {
    
    NSDictionary *mealsDict=(NSDictionary *)self.menuData[day];
    NSDictionary *countersDict=(NSDictionary *)mealsDict[meal];
    return [countersDict allKeys];
    
}

-(NSArray *) itemsForMeal:(NSString *)meal onDay:(DeliDay)day atCounter:(NSString *)counter
{
    NSDictionary *mealsDict=(NSDictionary *)self.menuData[day];
    NSDictionary *countersDict=(NSDictionary *)mealsDict[meal];
    NSArray *itemsArray=countersDict[counter];
    return itemsArray;
}

-(NSString *)description {
    return self.menuData.description;
}

#pragma mark - Class methods

+(DeliDay)deliDayForString:(NSString *)dayString {
   
    [DeliData setupDayStrings];
   
    for (NSInteger i=0;i<dayStrings.count;i++) {
        if ([dayString caseInsensitiveCompare:dayStrings[i]]==NSOrderedSame) {
            return i;
        }
    }
    return DeliDayUnknown;
    
}

+(NSString *)stringForDeliDay:(DeliDay)day {
    
    [DeliData setupDayStrings];
    
    return dayStrings[day];
}

@end

Item.h

#import <Foundation/Foundation.h>

@interface Item : NSObject

@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSString *url;

@end

Item.m

#import "Item.h"

@implementation Item

-(id) init {
    return [super init];
}

-(NSString *)description {
    return [NSString stringWithFormat:@"%@ - %@",self.title,self.url];
}
@end

MenuTableViewController.h

#import <UIKit/UIKit.h>
#import "DeliData.h"

@interface MenuTableViewController : UIViewController <UITableViewDataSource,UITableViewDelegate>

@property (strong,nonatomic) DeliData *deliData;
@property (assign) DeliDay day;
@property (strong,nonatomic) NSString *meal;

@end

MenuTableViewController.m

#import "MenuTableViewController.h"
#import "Item.h"


@interface MenuTableViewController ()

@property (strong,nonatomic) NSArray *counters;
@property (weak,nonatomic) IBOutlet UISegmentedControl *segmentedControl;
@property (weak,nonatomic) IBOutlet UITableView *tableView;

@end

@implementation MenuTableViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;
    
    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    
    NSArray *meals=[self.deliData mealsForDay:self.day];
    [self.segmentedControl removeAllSegments];
    for (int i=0;i<meals.count;i++) {
        [self.segmentedControl insertSegmentWithTitle:[meals[i] capitalizedString] atIndex:self.segmentedControl.numberOfSegments animated:NO];
    }
    self.meal=meals[0];
    self.title=[NSString stringWithFormat:@"%@ - %@",[DeliData stringForDeliDay:self.day],  self.meal];
    self.segmentedControl.selectedSegmentIndex=0;
    self.counters=[self sortCounters:[self.deliData countersForMeal:self.meal onDay:self.day]];
    [self.tableView reloadData];
}

-(NSArray *)sortCounters:(NSArray *)inputArray {
    
    NSMutableArray *outputArray=[inputArray mutableCopy];
    
    NSArray *desiredOrder=@[@"Entrée",@"Pizza",@"Breakfast"];
    
    NSInteger destination=0;
    
    for (int i=0;i<desiredOrder.count;i++) {
        NSInteger current=[outputArray indexOfObject:desiredOrder[i]];
        if (current != NSNotFound) {    // If found
            if (current != destination) {         // If not already in the right place
                [outputArray exchangeObjectAtIndex:current withObjectAtIndex:destination++];  // Move into place
            }
        }
    }
    
    
    
    return outputArray;
}

-(IBAction)segmentedSelected:(id)sender
{
    UISegmentedControl *segmentControl=(UISegmentedControl *)sender;
    self.meal=[[segmentControl titleForSegmentAtIndex:segmentControl.selectedSegmentIndex] uppercaseString];
    self.counters=[self sortCounters:[self.deliData countersForMeal:self.meal onDay:self.day]];
    [self.tableView reloadData];
    self.title=[NSString stringWithFormat:@"%@ - %@",[DeliData stringForDeliDay:self.day],  self.meal];
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    // Return the number of sections.
    if (self.counters == nil) {
        self.counters=[self.deliData countersForMeal:self.meal onDay:self.day];
    }
    return self.counters.count;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    
    NSArray *items=[self.deliData itemsForMeal:self.meal onDay:self.day atCounter:self.counters[section]];
    
    // Return the number of rows in the section.
    return items.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    
    NSArray *items=[self.deliData itemsForMeal:self.meal onDay:self.day atCounter:self.counters[indexPath.section]];
    
    Item *rowItem=items[indexPath.row];
    
    cell.textLabel.text=rowItem.title;
    
    return cell;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    return self.counters[section];

}

/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return NO if you do not want the specified item to be editable.
    return YES;
}
*/

/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }   
}
*/

/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/

/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return NO if you do not want the item to be re-orderable.
    return YES;
}
*/

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITableViewDataSource,UITableViewDelegate>


@end

ViewController.m

#import "ViewController.h"
#import "DeliData.h"
#import "MenuTableViewController.h"

@interface ViewController ()

@property (strong,nonatomic) DeliData *delidata;
@property (weak,nonatomic) IBOutlet UITableView *tableView;
@property (strong,nonatomic) NSMutableArray *dayOrder;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    NSString *file = [[NSBundle mainBundle] pathForResource:@"menu" ofType:@"xml"];
    NSString *str = [NSString stringWithContentsOfFile:file
                                              encoding:NSUTF8StringEncoding error:NULL];
    NSLog(@"str: %@", str);
    
    self.delidata=[[DeliData alloc] init:[str dataUsingEncoding:NSUTF16StringEncoding]];
    
    self.dayOrder=[NSMutableArray new];
    
    NSCalendar *cal=[NSCalendar currentCalendar];
    
    NSInteger dayNumber = [cal component:NSCalendarUnitWeekday fromDate:[NSDate date]]-1; // Sunday gives 0,
    
    for (int i=0;i<7;i++) {
        [self.dayOrder addObject:[NSNumber numberWithInteger:dayNumber]];
        dayNumber=(dayNumber+1)%6;
    }
    
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 7;
}

-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSNumber *dayNumber=self.dayOrder[section];
    return [self.delidata mealsForDay:[dayNumber integerValue]].count;
}

-(NSString *) tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    
    NSNumber *dayNumber=self.dayOrder[section];
    
    return [DeliData stringForDeliDay:[dayNumber integerValue]];
}

-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    
    NSNumber *dayNumber=self.dayOrder[indexPath.section];
    
    NSArray *meals=[self.delidata mealsForDay:[dayNumber integerValue]];
    
    cell.textLabel.text=meals[indexPath.row];
    
    return cell;
}

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"detailSegue"]) {
        MenuTableViewController *destVC=(MenuTableViewController *)segue.destinationViewController;
        destVC.deliData=self.delidata;
        NSIndexPath *selectedPath=[self.tableView indexPathForSelectedRow];
        destVC.day=selectedPath.section;
        destVC.meal=[self.delidata mealsForDay:destVC.day][selectedPath.row];
        [self.tableView deselectRowAtIndexPath:selectedPath animated:NO];
    }
}

@end