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This files describes API changes in /availability/*.

The information here is intended only for developers.

=== 4.4.1 ===
* The base class `info::get_groups` method has a `$userid` parameter to specify for which user you want to retrieve course groups (defaults
  to current user)

=== 4.3 ===
* The `availability_info templatable` no longer exports 'showmore' information, and any component rendering avaialable_info
  should handle showmore/showless behaviour by itself.
  That means that 'showmorelink', 'hidden' and 'abbreviate' won't be exported for template in the root element neither its child items,
  and `core_availability/availability_more` module has beed deprecated

=== 4.2 ===

* The form for editing availability conditions now supports "private" conditions, that should not be shown
  to users. If a "private" condition is selected (as determined by the condition plugin), the whole ruleset
  will be forcibly set to "Hidden entirely if student doesn't meet the conditions".
* The group condition plugin will now treat any rule containing a group with a visibility setting other than
  `visibility:ALL` as private.

=== 4.0 ===

* Method render_core_availability_multiple_messages() is deprecated. Please use core_availability\\output\\multiple_messages
  The new rendereable will produce output with a 'more' link when there is lots of availability information.
* There were existing restrictions on what condition plugins can do in the get_description
  method (for example they mustn't call format_string), which were not well documented.
  New functions description_cm_name(), description_format_string(), description_callback()
  can be used so that condition plugins to behave correctly in all situations.

=== 3.2 ===

* Condition plugins must replace the CSS selector "#fitem_id_availabilityconditionsjson" with ".availability-field".
  This selector is often used in your plugin's yui/src/form/js/form.js file.

=== 2.9 ===

* Condition plugins can now implement a new include_after_restore function to
  indicate that they should be removed during the restore process. (This is
  implemented so that group and grouping conditions are removed if groups are
  not restored.)

=== 2.8 ===

* There is a new API function in the info_module/info_section objects (and
  related functions in internal API): get_user_list_sql. This returns SQL code
  that does roughly the same as filter_user_list to return a list of users who
  should be shown as having access to the module or section.

* Any third-party availability plugins which return true to
  is_applied_to_user_lists (and therefore previously implemented
  filter_user_list) should now also implement get_user_list_sql. If not
  implemented, a debugging warning will occur when anybody calls
  get_user_list_sql if the affected plugin is in use, and that user list will
  not be filtered by the plugin.