/** * Constructor. * @param question_usage_by_activity $quba the question usage we will be picking variants for. * @param qubaid_condition $qubaids ids of the usages to consider when counting previous uses of each variant. */ public function __construct(\question_usage_by_activity $quba, \qubaid_condition $qubaids) { $questionidtoseed = array(); foreach ($quba->get_attempt_iterator() as $qa) { $question = $qa->get_question(); if ($question->get_num_variants() > 1) { $questionidtoseed[$question->id] = $question->get_variants_selection_seed(); } } if (empty($questionidtoseed)) { return; } $this->variantsusecounts = array_fill_keys($questionidtoseed, array()); $variantsused = \question_engine::load_used_variants(array_keys($questionidtoseed), $qubaids); foreach ($variantsused as $questionid => $usagecounts) { $seed = $questionidtoseed[$questionid]; foreach ($usagecounts as $variant => $count) { if (isset($this->variantsusecounts[$seed][$variant])) { $this->variantsusecounts[$seed][$variant] += $count; } else { $this->variantsusecounts[$seed][$variant] = $count; } } } }
public function test_load_used_variants() { $this->resetAfterTest(); $generator = $this->getDataGenerator()->get_plugin_generator('core_question'); $cat = $generator->create_question_category(); $questiondata1 = $generator->create_question('shortanswer', null, array('category' => $cat->id)); $questiondata2 = $generator->create_question('shortanswer', null, array('category' => $cat->id)); $questiondata3 = $generator->create_question('shortanswer', null, array('category' => $cat->id)); $quba = question_engine::make_questions_usage_by_activity('test', context_system::instance()); $quba->set_preferred_behaviour('deferredfeedback'); $question1 = question_bank::load_question($questiondata1->id); $question3 = question_bank::load_question($questiondata3->id); $quba->add_question($question1); $quba->add_question($question1); $quba->add_question($question3); $quba->start_all_questions(); question_engine::save_questions_usage_by_activity($quba); $this->assertEquals(array($questiondata1->id => array(1 => 2), $questiondata2->id => array(), $questiondata3->id => array(1 => 1)), question_engine::load_used_variants(array($questiondata1->id, $questiondata2->id, $questiondata3->id), new qubaid_list(array($quba->get_id())))); }