moodle/lib/xapi/upgrade.txt

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=== 4.5 Onwards ===
This file has been replaced by UPGRADING.md. See MDL-81125 for further information.
===
This files describes API changes in core_xapi libraries and APIs,
information provided here is intended especially for developers.
=== 4.3 ===
* The default state store will throw and exception if the activity ID is not
a numeric value. This is to avoid problems with the database when using
the default state store. If a plugin requires a non numeric activity ID,
it must implement its own state store.
* New xAPI state webservices:
- core_xapi_delete_states: delete all user state data for an activity
=== 4.2 ===
* A new state store has been introduced. Now plugins can store state data
by overriding the PLUGINNAME\xapi\handler::validate_state method.
* New core_xapi\state_store class to handle the state data storing. Plugins
can provide alternative state store implementations by overriding the
PLUGINNAME\xapi\handler::get_state_store method.
* New xAPI state webservices:
- core_xapi_post_state: store a user state data
- core_xapi_get_state: gets a user state data
- core_xapi_get_states: get the list of user states
- core_xapi_delete_state: delete a user state data