ClassroomViewController.m

//
//  ClassroomViewController.m
//  Univerzita
//
//  Created by Milan Vít on 12.01.14.
//  Copyright (c) 2014 Robert Jarusek. All rights reserved.
//

#import "ClassroomViewController.h"

#define BACKGROUND_COLOR [UIColor colorWithRed:89/255.0 green:138/255.0 blue:176/255.0 alpha:1.0]

@interface ClassroomViewController ()
{
    CHCSVParser *csvParser;
    NSMutableArray *entries;
    NSMutableData *responseData;
    NSMutableDictionary *item;
    NSMutableString *roomName;
    NSMutableString *roomInstructions;
}
@end

@implementation ClassroomViewController
#pragma mark Superclass methods
- (void)viewDidLoad
{
    [super viewDidLoad];

    // TODO: uncomment when .xib is ready
    //[[self tableView] registerNib:[UINib nibWithNibName:@"ClassroomTableViewCell" bundle:[NSBundle mainBundle]] forCellReuseIdentifier:@"CommentCell"];
    [[self view] setBackgroundColor:BACKGROUND_COLOR];

    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://cl.ly/TK6l/ucebny.csv"]];
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    // TODO: change this when you are sure about data structure
    entries = [[NSMutableArray alloc] init];

    [connection start];
    [self setTitle:@"Rozmístění učeben"];
}

#pragma mark UITableViewData delegate methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [entries count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"CommentCell";
    // TODO: change when .xib is ready
    // Can we reuse NewsViewController? Probably not
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
    }

    [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
    [[cell textLabel] setText:[[entries objectAtIndex:(NSUInteger) [indexPath row]] objectForKey:@"roomName"]];
    [[cell detailTextLabel] setText:[[entries objectAtIndex:(NSUInteger) [indexPath row]] objectForKey:@"roomInstructions"]];
    
    return cell;
}

#pragma mark UITableView delegate methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"Někdo na mě šáhl a já nevím, jak si to vyložit!");
}

#pragma mark NSURLConnectionData delegate methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    responseData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [responseData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSString *csvString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
    entries = [[NSMutableArray alloc] init];
    csvParser = [[CHCSVParser alloc] initWithCSVString:csvString];

    [csvParser setDelegate:self];
    [csvParser parse];
}

#pragma mark CHCSVParser delegate methods
- (void)parser:(CHCSVParser *)parser didBeginLine:(NSUInteger)recordNumber
{
    item = [[NSMutableDictionary alloc] init];
    roomName = [[NSMutableString alloc] init];
    roomInstructions = [[NSMutableString alloc] init];
}

- (void)parser:(CHCSVParser *)parser didEndLine:(NSUInteger)recordNumber
{
    [item setObject:roomName forKey:@"roomName"];
    [item setObject:roomInstructions forKey:@"roomInstructions"];

    [entries addObject:[item copy]];
}

- (void)parser:(CHCSVParser *)parser didReadField:(NSString *)field atIndex:(NSInteger)fieldIndex
{
    switch (fieldIndex)
    {
        case 0:
            [roomName setString:field];
            break;
        case 1:
            [roomInstructions setString:field];
            break;
        default:
            NSLog(@"This was not supposed to happen, ever. How did you manage to break the app this well? Grats!");
            break;
    }
}

- (void)parserDidEndDocument:(CHCSVParser *)parser
{
    [[self tableView] reloadData];
}
@end