Document available DI tags

reference/di_tags.rst

@@ -0,0 +1,45 @@
+Symfony dependency injection tags
+=================================
+
+The following lists all dependency injection tags and their usage available
+in Netgen Content Browser:
+
+``netgen_content_browser.backend``
+----------------------------------
+
+**Purpose**: Adds a new backend to the system
+
+A backend is a service that provides methods to load the list of items and
+locations in Content Browser interface. A backend needs to implement
+``Netgen\ContentBrowser\Backend\BackendInterface`` interface.
+
+When registering a new backend, you need to use the ``item_type`` attribute in
+the tag to specify the item type the backend is used for:
+
+.. code-block:: yaml
+
+    app.content_browser.my_backend:
+        class: AppBundle\ContentBrowser\MyBackend
+        tags:
+            - { name: netgen_content_browser.backend, item_type: my_backend }
+
+``netgen_content_browser.column_value_provider``
+------------------------------------------------
+
+**Purpose**: Adds a new column value provider for a single item column
+
+A column value provider is a service that provides a value to a column displayed
+in Content Browser interface for a specific item. Column value provider needs to
+implement
+``Netgen\ContentBrowser\Item\ColumnProvider\ColumnValueProviderInterface``
+interface.
+
+When registering a new column value provider, you need to use the ``identifier``
+attribute in the tag to attach a unique identifier to the provider:
+
+.. code-block:: yaml
+
+    app.content_browser.my_item.custom_column:
+        class: AppBundle\ContentBrowser\MyItem\CustomColumn
+        tags:
+            - { name: netgen_content_browser.column_value_provider, identifier: my_item\custom_column }

reference/index.rst

@@ -7,5 +7,6 @@ Reference
     install_instructions
     configuration
     symfony_services
+    di_tags
 
 .. include:: /reference/map.rst.inc

reference/map.rst.inc

@@ -1,3 +1,4 @@
 * :doc:`/reference/install_instructions`
 * :doc:`/reference/configuration`
 * :doc:`/reference/symfony_services`
+* :doc:`/reference/di_tags`