static void _network_prepStep_authorizeScratchURLRequest()

in Source/TNLRequestOperation.m [1610:1653]
37 lines of code
8 McCabe index (conditional complexity)

static void _network_prepStep_authorizeScratchURLRequest(TNLRequestOperation * __nullable const self, tnl_request_preparation_block_t nextBlock)
{
    if (!self) {
        return;
    }

    TNLAssert(nextBlock != nil);
    TNLAssert([self _network_isPreparing]);

    id<TNLRequestAuthorizer> authorizer = self.internalDelegate;
    SEL callback = @selector(tnl_requestOperation:authorizeURLRequest:completion:);

    if (!authorizer || ![authorizer respondsToSelector:callback]) {
        nextBlock();
        return;
    }

    tnl_dispatch_barrier_async_autoreleasing(self->_callbackQueue, ^{
        NSString *tag = TAG_FROM_METHOD(authorizer, @protocol(TNLRequestAuthorizer), callback);
        [self _updateTag:tag];
        [authorizer tnl_requestOperation:self
                     authorizeURLRequest:[self->_scratchURLRequest copy]
                              completion:^(NSString *authHeader, NSError *error) {
            [self _clearTag:tag];

            tnl_dispatch_async_autoreleasing(tnl_network_queue(), ^{
                if (![self _network_isPreparing]) {
                    return;
                }

                if (error) {
                    [self _network_fail:TNLErrorCreateWithCodeAndUnderlyingError(TNLErrorCodeRequestOperationFailedToAuthorizeRequest, error)];
                    return;
                }

                if (authHeader) {
                    [self->_scratchURLRequest setValue:(authHeader.length > 0) ? authHeader : nil
                                    forHTTPHeaderField:@"Authorization"];
                }
                nextBlock();
            });
        }];
    });
}