/*

     File: RecipeListTableViewController.m 

 Abstract: The UITableViewController for displaying a list of recipes 

  Version: 1.2 

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 */ 

#import "RecipeListTableViewController.h"

#import "RecipeDetailViewController.h"

#import "Recipe.h"

#import "RecipesController.h"

#import "RecipePrintPageRenderer.h"

#import "RecipeTableViewCell.h"

@interface RecipeListTableViewController()

- (void)printSelectedRecipes:(id)sender;

@property (nonatomic, strong) RecipesController *recipesController;

@end

@implementation RecipeListTableViewController

// Custom initializer that makes the recipes/model controller available to the table view controller.

- (id)initWithStyle:(UITableViewStyle)style recipesController:(RecipesController *)aRecipesController {

    self = [super initWithStyle:style];

    if (self) {

        _recipesController = aRecipesController;

        self.title = NSLocalizedString(@"Recipes",@"");

        // Add a print button and use self -printSelectedRecipes: as the press handler

        UIBarButtonItem *addButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Print", @"") 

                                                                          style:UIBarButtonItemStyleBordered 

                                                                         target:self 

                                                                         action:@selector(printSelectedRecipes:)];        

        // Set the Print button as the right side button item of this view controller's navigation bar

        self.navigationItem.rightBarButtonItem = addButtonItem;

        // Increase the height of the table rows - 1 pixel higher than the recipe thumbnails displayed in the table cells.

        self.tableView.rowHeight = 43.0;

    }

    return self;

}

// Release ownership.

#pragma mark -

#pragma mark Printing

// Print button handler that sends our print instructions to the OS

- (void)printSelectedRecipes:(id)sender {

    // Get a reference to the singleton iOS printing concierge

    UIPrintInteractionController *printController = [UIPrintInteractionController sharedPrintController];

    // Throw all recipes into an array to hand off to the printing code.

    NSArray *recipes = [self.recipesController.recipes copy];

    // Instruct the printing concierge to use our custom UIPrintPageRenderer subclass when printing this job

    printController.printPageRenderer = [[RecipePrintPageRenderer alloc] initWithRecipes:recipes];

    // Ask for a print job object and configure its settings to tailor the print request

    UIPrintInfo *info = [UIPrintInfo printInfo];

    // B&W or color, normal quality output for mixed text, graphics, and images

    info.outputType = UIPrintInfoOutputGeneral;

    // Select the job named this in the printer queue to cancel our print request.

    info.jobName = @"Recipes";

    // Instruct the printing concierge to use our custom print job settings. 

    printController.printInfo = info;

    // Present the standard iOS Print Panel that allows you to pick the target Printer, number of pages, double-sided, etc.

    [printController presentAnimated:YES completionHandler:^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {

        ;

    }];

}

#pragma mark -

#pragma mark UIViewController

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);

}

#pragma mark -

#pragma mark UITableView Delegate/Datasource

// Determines the number of sections within this table view

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

    // This displays a single list of recipes, so one section will do.

    return 1; 

}

// Determines the number of rows for the argument section number

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    // Since this sample has only one section, assume we were passed section = 1, and return the number of recipes.

    return self.recipesController.countOfRecipes;

}

// Create or Access and return appropriate cell identified by the argument indexPath (i.e. Section number and Row number combination)

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    // Define an identifier we can associate with table cells. Used with cell reuse as follows.

    static NSString *recipeIdentifier = @"Recipe";

    // Ask for a cached cell that's been moved off the screen that we can therefore repurpose for a new cell coming onto the screen. 

    RecipeTableViewCell *recipeCell = (RecipeTableViewCell *)[tableView dequeueReusableCellWithIdentifier:recipeIdentifier];

    // If no cached cells are available, create one. Depending on your table row height, we only need to create enough to fill one screen.

    // After that, the above call will start working to give us the cell that got scrolled off the screen.

    if (recipeCell == nil) {

        recipeCell = [[RecipeTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:recipeIdentifier];

    }

    // Provide to the cell its corresponding recipe depending on the argument row

    recipeCell.recipe = [self.recipesController objectInRecipesAtIndex:indexPath.row];

    // Right arrow-looking indicator on the right side of the table view cell

    recipeCell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

    return recipeCell;

}

// Cell touch handler that pushes the recipe detail view onto the navigation controller stack

- (void)showRecipe:(Recipe *)recipe animated:(BOOL)animated {

    RecipeDetailViewController *detailViewController = [[RecipeDetailViewController alloc] initWithRecipe:recipe];

    [self.navigationController pushViewController:detailViewController animated:animated];

}

// Call the cell touch handler and pass in the recipe associated with the argument section/row

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    Recipe *recipe = [self.recipesController objectInRecipesAtIndex:indexPath.row];

    [self showRecipe:recipe animated:YES];

}

@end