FeedViewController.m

//
//  FeedViewController.m
//  BurppleShare
//
//  Created by Lee Jun Kit on 6/3/13.
//  Copyright (c) 2013 Burpple. All rights reserved.
//

#import "FeedViewController.h"
#import "AppDelegate.h"
#import "JournalCell.h"
#import "Journal.h"
#import "Photo.h"
#import "DraftsViewController.h"
#import <AssetsLibrary/AssetsLibrary.h>
#import <SDWebImage/SDImageCache.h>

@interface FeedViewController ()

@end

@implementation FeedViewController {
    NSURL *photosDirectory;
    NSManagedObjectContext *moc;
    NSArray *journalArray;
    ALAssetsLibrary* assetsLibrary;
}

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        //get a reference to the managed object context
        AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
        moc = appDelegate.managedObjectContext;
        assetsLibrary = [[ALAssetsLibrary alloc] init];
        
    }
    
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    //register for notifications
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sharingFlowCompleted:) name:@"SharingFlowComplete" object:nil];
    
    //configure the nav bar
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(addButtonPressed:)];
    
    UIButton *draftsButton = [UIButton buttonWithType:UIButtonTypeCustom];
    draftsButton.frame = CGRectMake(0, 0, 120, 44);
    [draftsButton setTitle:@"Tap for Drafts" forState:UIControlStateNormal];
    [draftsButton addTarget:self action:@selector(draftsButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    
    self.navigationItem.titleView = draftsButton;
    
    //configure the table
    if ([self.tableView respondsToSelector:@selector(registerClass:forCellReuseIdentifier:)]) {
        [self.tableView registerClass:[JournalCell class] forCellReuseIdentifier:@"JournalCell"];
    }
    
    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    
    //get a reference to the photos directory
    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
    photosDirectory = [appDelegate.applicationDocumentsDirectory URLByAppendingPathComponent:@"photos" isDirectory:YES];
    
    [self reloadFeedData];
    
    // 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)reloadFeedData {
    //fetch objects from Core Data
    NSEntityDescription *entityDescription = [NSEntityDescription entityForName:@"Journal" inManagedObjectContext:moc];
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    fetchRequest.entity = entityDescription;
    
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(state == 1)"];
    fetchRequest.predicate = predicate;
    
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"created" ascending:NO];
    fetchRequest.sortDescriptors = @[sortDescriptor];
    
    NSError *fetchError;
    NSArray *journalResults = [moc executeFetchRequest:fetchRequest error:&fetchError];
    if (journalResults) {
        journalArray = journalResults;
        SDImageCache *imageCache = [SDImageCache sharedImageCache];
        
        for (Journal *journal in journalArray) {
            NSOrderedSet *photosInJournal = journal.photos;
            NSLog(@"the count of photosInJournal is %i", photosInJournal.count);
            NSLog(@"is journal a fault? %i", journal.isFault);
            
            //NSLog(@"ok gonna try accessing them %@", [[photosInJournal objectAtIndex:0] valueForKey:@"resizedImageID"]);
            
            for (Photo *photo in photosInJournal) {
                //pre-load photos into cache
                if (![imageCache imageFromMemoryCacheForKey:photo.resizedImageID]) {
                    NSData *imageData = [NSData dataWithContentsOfURL:[photosDirectory URLByAppendingPathComponent:[NSString stringWithFormat:@"%@.jpg", photo.resizedImageID]]];
                    UIImage *image = [UIImage imageWithData:imageData];
                    [imageCache storeImage:image forKey:photo.resizedImageID toDisk:NO];
                }
            }
            
            NSLog(@"now is journal a fault? %i", journal.isFault);
        }
        
        
        
        [self.tableView reloadData];
    }
    
    else {
        NSLog(@"Error fetching journal entries from Core Data: %@", [fetchError localizedDescription]);
    }
    
    

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

#pragma mark - View actions
- (void)addButtonPressed:(id) sender {
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Storyboard" bundle:nil];
    [self presentModalViewController:[storyboard instantiateViewControllerWithIdentifier:@"SharingFlowStartNavView"] animated:YES];
}

- (void)sharingFlowCompleted:(NSNotification *)notification {
    [self dismissViewControllerAnimated:YES completion:^{
        [self reloadFeedData];
    }];
}

- (void)draftsButtonTapped:(id)sender {
    DraftsViewController *draftsController = [[DraftsViewController alloc] init];
    [self.navigationController pushViewController:draftsController animated:YES];
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return journalArray.count;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return [JournalCell heightForRenderedCellWithJournal:journalArray[indexPath.row]];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"JournalCell";
    JournalCell *cell;
    
    if ([tableView respondsToSelector:@selector(dequeueReusableCellWithIdentifier:forIndexPath:)]) {
        cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    }
    
    else {
        //ios 5
        cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        
        if (!cell) {
            cell = [[JournalCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        }
    }
    
    cell.assetsLibary = assetsLibrary; 
    
    Journal *journal = journalArray[indexPath.row];
    [cell renderWithJournal:journal];
    
    return cell;
}

/*
// 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 - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Navigation logic may go here. Create and push another view controller.
    /*
     <#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
     // ...
     // Pass the selected object to the new view controller.
     [self.navigationController pushViewController:detailViewController animated:YES];
     */
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

@end