func()

in util/gcs/fake/fake.go [41:79]

• 39 lines of code
• 17 McCabe index (conditional complexity)

func (cc *ConditionalClient) check(ctx context.Context, from, to *gcs.Path) error {
	if from != nil && cc.read != nil {
		attrs, err := cc.UploadClient.Stat(ctx, *from)
		switch {
		case err != nil:
			return err
		case cc.read.GenerationMatch != 0 && cc.read.GenerationMatch != attrs.Generation:
			return fmt.Errorf("bad genneration due to GenerationMatch: %w", &googleapi.Error{
				Code: http.StatusPreconditionFailed,
			})
		case cc.read.GenerationNotMatch != 0 && cc.read.GenerationNotMatch == attrs.Generation:
			return fmt.Errorf("bad generation due to GenerationNotMatch: %w", &googleapi.Error{
				Code: http.StatusPreconditionFailed,
			})
		}
	}
	if to != nil && cc.write != nil {
		attrs, err := cc.UploadClient.Stat(ctx, *to)
		switch {
		case err == storage.ErrObjectNotExist:
			if cc.write.GenerationMatch != 0 {
				return fmt.Errorf("bad generation: %w", &googleapi.Error{
					Code: http.StatusPreconditionFailed,
				})
			}
		case err != nil:
			return err
		case cc.write.GenerationMatch != 0 && cc.write.GenerationMatch != attrs.Generation:
			return fmt.Errorf("bad generation due to GenerationMatch: %w", &googleapi.Error{
				Code: http.StatusPreconditionFailed,
			})
		case cc.write.GenerationNotMatch != 0 && cc.write.GenerationNotMatch == attrs.Generation:
			return fmt.Errorf("bad generation due to GenerationNotMatch: %w", &googleapi.Error{
				Code: http.StatusPreconditionFailed,
			})
		}
	}
	return nil
}