Editing Updating Cached Front-Facing Content After Gallery Edits (section)

== Adding logic to update front-end cached content after page image edits ==

The site's local `cache_class` should have 2 routines defined: `refresh_content_after_image_edit($content, $filters, $json)` and `retrieve_gallery_listings_content($content, $filters, $json)`.

`cache_class::retrieve_gallery_listings_content()` simply loads the gallery listings template, populates it with data, and returns the resulting markup.

`cache_class::refresh_content_after_image_edit()` calls `cache_class::retrieve_gallery_listings_content()` and then executes the logic to update the front-end cached content.

For example:

<syntaxhighlight lang="php">
	public static function refresh_content_after_image_edit ( &$content, &$filters, &$json )
	{
		switch($content->site_section->id->value)
		{
			case comics_class::PAGE_SECTION_ID:
			case sketchbook_class::PAGE_SECTION_ID:
			case stasis_class::PAGE_SECTION_ID:

				cache_class::retrieve_gallery_listings_content($content, $filters, $json);
				cache_class::update_parent_frontend_cache($content, $filters, $json);
				break;
		}
	}

	public static function update_parent_frontend_cache( &$content, &$filters, &$json )
	{
		if ($content instanceof image_link_class)
		{
			if ($content->parent_id->value > 0)
			{
				$parent = null;
				$content_type_id = $content->get_parent_content_type_id();
				if ($content_type_id)
				{
					cache_class::set_content($content_type_id, $parent);
					if (is_object($parent) && method_exists($parent, "update_cache"))
					{
						$parent->id->value = $content->parent_id->value;
						$parent->read(true);
						$json->status->value .= $parent->update_cache();
					}
				}
			}
		}
	}

</syntaxhighlight>