Meetup API Login iOS

gistfile1.m

#import "LoginViewController.h"
#import "Global.h"
#import "MeetupTopic.h"
#import "UserAuthenticated.h"

@interface LoginViewController () <UIWebViewDelegate>
@property (strong, nonatomic) UIWebView* webView;
@property (strong, nonatomic) NSNumber* userId;
@end

@implementation LoginViewController

- (void)loadView
{
    [super loadView];
    
    CGRect meetupButton = CGRectMake(10, 110, 300, 44);

    UIButton* meetup = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    meetup.backgroundColor = [UIColor clearColor];
    [meetup setTitle:@"MEETUP" forState:UIControlStateNormal];
    [meetup addTarget:self action:@selector(goMeetup) forControlEvents:UIControlEventTouchUpInside];
    meetup.frame = meetupButton;
    [self.view addSubview:meetup];

    UIButton* exit = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    exit.backgroundColor = [UIColor clearColor];
    [exit setTitle:@"X" forState:UIControlStateNormal];
    [exit addTarget:self action:@selector(exit) forControlEvents:UIControlEventTouchUpInside];
    exit.frame = CGRectMake(20, 20, 44, 44);
    [self.view addSubview:exit];
    
    _webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height, self.view.bounds.size.width, self.view.bounds.size.height)];
    _webView.delegate = self;
    [self.view addSubview:_webView];
}

- (void)goMeetup
{
    NSString* scope = [NSString stringWithFormat:@"https://secure.meetup.com/oauth2/authorize?client_id=%@&response_type=code&redirect_uri=%@", MEETUP_CLIENTID, @"http://www.filmproj.com"];

    CGRect newRect = self.view.bounds;
    
    [_webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:scope]]];
    
    [UIView animateWithDuration:0.3f animations:^{
        _webView.frame = newRect;
    }];
}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSLog(@"request url lastpathComponent = %@", request.URL.lastPathComponent);
    NSString *html = [webView stringByEvaluatingJavaScriptFromString:
                      @"document.body.innerHTML"];
    NSString* part = [self scanString:html startTag:@"MM.Member={" endTag:@"</script>"];
    
    NSString* anId = [self scanString:part startTag:@"id:" endTag:@","];
    
    NSNumberFormatter * f = [[NSNumberFormatter alloc] init];
    [f setNumberStyle:NSNumberFormatterDecimalStyle];
    self.userId = [f numberFromString:anId];

    
    if (self.userId) {
        [self userApi];
    } else {
        [self alertError];
    }
    
    return YES;
}

- (NSString *)scanString:(NSString *)string startTag:(NSString *)startTag endTag:(NSString *)endTag
{
    
    NSString* scanString = @"";
    
    if (string.length > 0) {
        
        NSScanner* scanner = [[NSScanner alloc] initWithString:string];
        
        [scanner scanUpToString:startTag intoString:nil];
        scanner.scanLocation += [startTag length];
        [scanner scanUpToString:endTag intoString:&scanString];
    }
    
    
    return scanString;
    
}

- (void)userApi
{
    
    NSString* urlString = [NSString stringWithFormat:@"https://api.meetup.com/members?member_id=%@&key=%@", self.userId, MEETUP_KEY];
    
    [NSURLConnection sendAsynchronousRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]] queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        if (data) {
            NSDictionary* dictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
            //NSLog(@"dictionary = %@", dictionary);
            if (dictionary) {
                NSDictionary* userResponse = [dictionary valueForKey:@"results"][0];
                //NSLog(@"userResponse = %@", userResponse);
                if (userResponse) {
                    NSString* city = [userResponse valueForKey:@"city"];
                    NSString* country = [userResponse valueForKey:@"country"];
                    NSString* name = [userResponse valueForKey:@"name"];
                    NSString* state = [userResponse valueForKey:@"state"];
                    NSString* avatarUrl = [userResponse valueForKey:@"photo_url"];
                    NSArray* topicsArray = [userResponse valueForKey:@"topics"];
                    NSMutableArray* topicsArrayHolder = [NSMutableArray array];
                    for (NSDictionary* json in topicsArray) {
                        NSLog(@"topicsArray = %@", topicsArray);
                        NSNumber* jsonId = [json valueForKey:@"id"];
                        NSString* jsonName = [json valueForKey:@"name"];
                        NSString* jsonUrlKey = [json valueForKey:@"urlKey"];
                        MeetupTopic* topic = [[MeetupTopic alloc] initWithTopicId:jsonId name:jsonName urlKey:jsonUrlKey];
                        [topicsArrayHolder addObject:topic];
                    }
                    [[UserAuthenticated sharedInstance] makeUserWithId:self.userId username:name city:city state:state country:country imageUrl:avatarUrl andTopics:topicsArrayHolder];
                    [topicsArrayHolder removeAllObjects];
                    
                    // tests for user authenticated object
                    
                    NSNumber* user0 = [[UserAuthenticated sharedInstance] userId];
                    NSString* user1 = [[UserAuthenticated sharedInstance] userName];
                    NSString* user2 = [[UserAuthenticated sharedInstance] city];
                    NSString* user3 = [[UserAuthenticated sharedInstance] state];
                    NSString* user4 = [[UserAuthenticated sharedInstance] country];
                    NSArray* user5 = [[UserAuthenticated sharedInstance] topicsArray];
                    UIImage* user6 = [[UserAuthenticated sharedInstance] avatar];
                    
                    NSLog(@"%@\n%@\n%@\n%@\n%@\n%@\n%@", user0, user1, user2, user3, user4, user5, user6);
                    
                    // dismiss controller
                    
                    // update ui on other pages, and enable features
                    
                } else {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        [self alertError];
                    });
                }
            } else {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self alertError];
                });
            }
        } else {
            dispatch_async(dispatch_get_main_queue(), ^{
                [self alertError];
            });
        }
    }];
}

- (void)alertError
{
    [[[UIAlertView alloc] initWithTitle:nil message:@"err, if it's not you it's me" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil] show];
}


@end