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This files describes API changes for code that uses the question API.

=== 3.7 ===

The code for the is_valid_number function that was duplicated in the
qtype_numerical and qtype_multianswer plugins in the qtype_numerical_edit_form
and qtype_multianswer_edit_form classes has been moved to a static function
in the qtype_numerical class of the qtype_numerical plugin.

The exportprocess function of the qformat_default class doesn't output a blank line
if the result of the writequestion function is null. This permit to qformat plugins
to ignore some questions without the need to overwrite this function.

* The question_preview_cron() has been deleted. Please use \core\task\question_cron_task::execute().
* The question_usage_statistics_cron() has been deleted. Please use \core\task\question_cron_task::execute().
* The method question_bank::cron() has been deleted, please use question related scheduled tasks.

=== 3.5 ===

1) The question format exportprocess function now adds a
   $checkcapabilities boolean to allow questions to be exported in
   certain circumstances.

=== 3.2 ===

1) The following renderers have been deprecated in favour of the renderable
   core_question\output\qbank_chooser and associated render_* method.
    * qbank_chooser
    * qbank_chooser_types
    * qbank_chooser_qtype
    * qbank_chooser_title

=== 3.1 ===

1) The argument $requirecourseid was removed from question_edit_setup() and
   is no longer respected. The behaviour was found to be buggy and now throws
   debugging notices if passed.

=== 2.9 ===

1) Some functions in questionlib.php which were deprecated in the past have now
   been deleted:

Deprecated since 2.1
    * question_list_instances
    * get_grade_options
    * question_category_isused
    * save_question_options
    * question_get_real_state

Deprecated since 2.6
    * question_rewrite_questiontext_preview_urls
    * question_send_questiontext_file
    * question_pluginfile no longer falls back to using the old
      {$previewcomponent}_questiontext_preview_pluginfile callback if the new
      {$previewcomponent}_question_preview_pluginfile callback is missing.

=== 2.8 ===

1) This is just a warning that some methods of the question_engine_data_mapper
   class have changed. All these methods are ones that you should not have been
   calling directly from your code, so this should not cause any problems.
   The changed methods are:
    * insert_question_attempt
    * insert_step_data
    * update_question_attempt_step

=== 2.7 ===

1)  Changes to class question_bank_view:

Filters, including $recurse and $showhidden, are now implemented as
    pluggable \core_question\bank\search\condition classes.

Therefore $recurse and $showhidden are no longer passed to the following functions:
        protected function display_options [deprecated, use display_options_form()]
        protected function build_query_sql [deprecated, use build_query()]

protected function display_category_form() is deprecated. Use \core_question\bank\search\category_condition

protected function display_category_form_checkbox deprecated use html_writer::checkbox and separate JavaScript

To add filters, local plugins can now implement the function local_[pluginname]_get_question_bank_search_conditions,

2) To make columns available to question_bank_view, plugins can extend core_question\bank\column_base.
   Users may choose to display additional columns by setting $CFG->questionbankcolumns to a comma-delimited list of columns.

3) The subsort separator has changed from _ to - in order to distinuguish subsorts vs frankenstyle component separators.

4) Because of the move to autoloading, $knowncolumntypes and known_field_types() are no longer used.

5) question_bank_column_base and it's derived classes have been namespaced to core_question\bank\column_base.

=== 2.6 ===

1) Modules using the question bank MUST now declare their use of it with the xxx_supports()
   flag FEATURE_USES_QUESTIONS. question_module_uses_questions() should be used to determine
   if a module uses questions.

2) It is sometimes necessary to display bits of question content without having
   and attempt (question_usage) in progress. Two examples of this are the option
   in the question bank to display the questiontext, and in the quiz statistics
   report, where it displays the question text above the report.

Previously, this display was done using a special method that only worked for
   the question text, but which would not work for other parts of the question.
   That old mechanism has been deprecated, and there is a new method that you
   should use.

To display the question, replace calls to question_rewrite_questiontext_preview_urls
   with calls to question_rewrite_question_preview_urls. Because the new function
   is more flexibile, you have to pass more arguments.

To perform the necessary permission checks when the file is downloaded, you need
   to implement the callback [component name]_question_preview_pluginfile.
   (Previously you implemented [component name]_questiontext_preview_pluginfile.)
   quiz_statistics_question_preview_pluginfile is an example of what to do.

question_send_questiontext_file has been deprecated. It is no longer necessary.

To ensure you are no longer using or defining any deprecated functions,
   search for the regular expression:
   question_rewrite_questiontext_preview_urls|_questiontext_preview_pluginfile|question_send_questiontext_file

3) The argument list for core_question_renderer::mark_summary has changed.
   Please update your calls. (The most likely scenario for this is if you have
   overridden core_question_renderer::info in your own renderer.) You need to
   make a change like:
   - $this->mark_summary($qa, $options);
   + $this->mark_summary($qa, $behaviouroutput, $options);