//
//  NYTUtil.m
//  Notifications for YouTube
//
//  Created by Kim Wittenburg on 21.07.13.
//  Copyright (c) 2013 Kim Wittenburg. All rights reserved.
//

#import "NYTUtil.h"

// API Imports
#import "GTMOAuth2Authentication.h"

// Core Imports
#import "NYTAuthentication.h"

extern NSXMLDocument * LoadXMLDocumentSynchronous(NSString *url, GTMOAuth2Authentication *auth, NSError **outError)
{
    // Group to wait for refresh of token (if neccessary)
    dispatch_group_t group = dispatch_group_create();
    dispatch_group_enter(group);

    // Create the request; authenticate and authorize it.
    NSURL *actualURL = [NSURL URLWithString:url];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:actualURL];
    [request setValue:DeveloperKey forHTTPHeaderField:DeveloperKeyHTTPHeaderField];
    dispatch_sync(dispatch_get_main_queue(), ^{
        // Seems that authorization must be performed on the main queue
        [auth authorizeRequest:request completionHandler:^(NSError *error) {
            if (outError != NULL) {
                *outError = error;
            }
            dispatch_group_leave(group);
        }];
    });

    // Wait for authorization
    dispatch_group_wait(group, DISPATCH_TIME_FOREVER);
    if (*outError) {
        // The authorization failed
        return nil;
    }

    // Create the document
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:NULL error:outError];
    if (!data) {
        return nil;
    }
    NSXMLDocument *document = [[NSXMLDocument alloc] initWithData:data options:NSXMLDocumentTidyXML error:outError];
    return document;

}