iOS Client for Endpoints Backend. GradeRecorder Service and Authorizer objects

GradeRecorderServiceAndAuthorizer.m

#pragma mark - Service

+ (BOOL) isLocalHost {
    return kLocalHostTesting;
}


+ (GTLServiceGraderecorder*) getService {
    if (__graderecorderService == nil) {
        __graderecorderService = [[GTLServiceGraderecorder alloc] init];
        if (kLocalHostTesting) {
            __graderecorderService.rpcURL = [NSURL URLWithString:kLocalHostUrl];
            __graderecorderService.fetcherService.allowLocalhostRequest = YES; // NEW!!! (added since video was made)
        }
        __graderecorderService.retryEnabled = YES;
        [GTMHTTPFetcher setLoggingEnabled:YES];
    }
    return __graderecorderService;
}


#pragma mark - Authorizer

+ (BOOL) hasAuthorizer {
    return [RHOAuthUtils _getAuthorizer] != nil; // Very important to use the _getAuthorizer function.
}


// Returns the current authorizer if available, otherwise attempt to return the saved authorizer.
+ (GTMOAuth2Authentication*) _getAuthorizer {
    if (__authorizer == nil) {
        GTMOAuth2Authentication* savedAuthorizer;
        savedAuthorizer = [GTMOAuth2ViewControllerTouch authForGoogleFromKeychainForName:kKeychainItemName
                                                                                clientID:kIosClientID
                                                                            clientSecret:kIosClientSecret];
        if (savedAuthorizer.canAuthorize && savedAuthorizer.userEmail != nil) {
            NSLog(@"Using a saved authorizer");
            [RHOAuthUtils _setAuthorizer:savedAuthorizer];
        }
    }
    __authorizer.authorizationTokenKey = @"id_token";
    if (kLocalHostTesting) {
        NSLog(@"Authorizing all requests.");
        __authorizer.shouldAuthorizeAllRequests = YES;
    }
    return __authorizer;
}


// Set the authorizer and link the authorizer to the service.
+ (void) _setAuthorizer:(GTMOAuth2Authentication*) authorizer {
    if (authorizer != nil) {
        NSAssert(authorizer.userEmail != nil, @"Authorizer has no user email");
        NSAssert(authorizer.canAuthorize, @"Authorizer can't authorize");
    }
    __authorizer = authorizer;
    [RHOAuthUtils getService].authorizer = [RHOAuthUtils _getAuthorizer];
}