use namespace for globally accessed variables

Author: zzacharo

invenio_app_rdm/records_ui/templates/semantic-ui/invenio_app_rdm/records/detail.html

@@ -26,11 +26,8 @@
 {%- set title = record_ui["metadata"]["title"] %}
 {%- set metadata = record_ui["metadata"] %}
 
-{%- if record_ui["files"]["enabled"] and permissions.can_read_files %}
-  {%- set files = files | order_entries | selectattr("status", "==", "completed") | list %}
-{%- else %}
-  {%- set files = [] %}
-{%- endif %}
+<!-- Shared namespace for files to allow overridability on child blocks while maintaining reference to parent values -->
+{% set files_ns = namespace(preview_file=None, files=[]) %}
 
 {%- set can_curate_record = permissions is defined and (permissions.can_edit or permissions.can_review) %}
 
@@ -294,16 +291,18 @@
                          aria-label="{{ _('Files') }}">
                   {%- if permissions.can_read_files -%}
                     {# record has files AND user can see files #}
-                    {%- if files|length > 0 -%}
+                    {# Shared namespace for files (outside blocks) #}
+                    {%- set files_ns.files = files | order_entries | selectattr("status", "==", "completed") | list %}
+                    {%- if files_ns.files|length > 0 -%}
                       <h2 id="files-heading">{{ _('Files') }}</h2>
-                      {%- if files|has_previewable_files -%}
+                      {%- if files_ns.files|has_previewable_files -%}
+                        {%-set files_ns.preview_file = files_ns.files|select_preview_file(default_preview=record_ui["files"]["default_preview"]) %}
                         {%- block record_file_preview -%}
-                          {%-set preview_file = files|select_preview_file(default_preview=record_ui["files"]["default_preview"]) %}
                           {{ preview_file_box(preview_file, record_ui["id"], is_preview, record, include_deleted) }}
                         {%- endblock record_file_preview -%}
                       {%- endif -%}
                       {%- block record_file_list -%}
-                        {{ file_list_box(files, record_ui["id"], is_preview, include_deleted, record, permissions) }}
+                        {{ file_list_box(files_ns.files, record_ui["id"], is_preview, include_deleted, record, permissions) }}
                       {%- endblock record_file_list -%}
                     {% endif %}
                   {% else %}