{% macro book_cover_image(book, thumbnails, title=None) -%} {%- set book_title = book.title if book.title else book.name -%} {%- set book_title = title if title else book_title -%} {% set srcset = thumbnails|get_book_thumbnail_srcset if thumbnails|length else '' %} {%- if srcset|length -%} {{ book_title }} {%- else -%} {{ book_title }} {%- endif -%} {%- endmacro %}