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<?php |
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/** |
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* Class HealthCheckProvider |
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* |
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* @package LearnPress/Classes/Statistics |
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* @since 4.4.2 |
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*/ |
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|
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namespace LearnPress\Statistics; |
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|
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use LP_Database; |
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|
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defined( 'ABSPATH' ) || exit(); |
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|
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/** |
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* Content health checks for the statistics dashboard. |
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* |
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* Deliberately NOT time-filtered — a course with zero enrollments is a |
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* problem regardless of the selected period. |
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* |
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* @since 4.4.2 |
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*/ |
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class HealthCheckProvider extends LP_Database { |
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/** |
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* @var HealthCheckProvider |
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*/ |
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private static $_instance; |
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|
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protected function __construct() { |
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parent::__construct(); |
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} |
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|
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/** |
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* @return HealthCheckProvider |
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*/ |
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public static function getInstance(): HealthCheckProvider { |
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if ( is_null( self::$_instance ) ) { |
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self::$_instance = new self(); |
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} |
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|
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return self::$_instance; |
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} |
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|
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/** |
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* @param StatisticsScope|null $scope |
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* @return array [ 'no_enrollment' => int, 'no_content' => int, 'pending_review' => int, 'quiz_low_pass' => int ] |
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*/ |
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public function get_checks( ?StatisticsScope $scope = null ): array { |
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return array( |
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'no_enrollment' => $this->count_courses_without_enrollment( $scope ), |
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'no_content' => $this->count_courses_without_content( $scope ), |
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'pending_review' => $this->count_pending_courses( $scope ), |
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'quiz_low_pass' => $this->count_low_pass_quizzes( $scope ), |
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); |
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} |
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|
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/** |
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* @param StatisticsScope|null $scope |
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* @return string |
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*/ |
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private function scope_condition( ?StatisticsScope $scope, string $course_id_field ): string { |
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if ( ! $scope || $scope->is_empty() ) { |
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return ''; |
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} |
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|
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return $scope->sql_conditions( $course_id_field ); |
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} |
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|
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/** |
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* Published courses no user ever had a course row for. |
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* |
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* @param StatisticsScope|null $scope |
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* @return int |
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*/ |
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private function count_courses_without_enrollment( ?StatisticsScope $scope ): int { |
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$where = $this->scope_condition( $scope, 'p.ID' ); |
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|
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$sql = $this->wpdb->prepare( |
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"SELECT COUNT(*) FROM {$this->tb_posts} AS p |
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WHERE p.post_type = %s AND p.post_status = %s {$where} |
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AND NOT EXISTS ( |
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SELECT 1 FROM {$this->tb_lp_user_items} AS ui |
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WHERE ui.item_id = p.ID AND ui.item_type = %s |
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)", |
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LP_COURSE_CPT, |
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'publish', |
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LP_COURSE_CPT |
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); |
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|
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return (int) $this->wpdb->get_var( $sql ); |
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} |
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|
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/** |
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* Published courses with no section items (empty curriculum). |
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* |
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* @param StatisticsScope|null $scope |
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* @return int |
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*/ |
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private function count_courses_without_content( ?StatisticsScope $scope ): int { |
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$where = $this->scope_condition( $scope, 'p.ID' ); |
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|
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$sql = $this->wpdb->prepare( |
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"SELECT COUNT(*) FROM {$this->tb_posts} AS p |
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WHERE p.post_type = %s AND p.post_status = %s {$where} |
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AND NOT EXISTS ( |
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SELECT 1 FROM {$this->tb_lp_sections} AS s |
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INNER JOIN {$this->tb_lp_section_items} AS si ON si.section_id = s.section_id |
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WHERE s.section_course_id = p.ID |
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)", |
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LP_COURSE_CPT, |
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'publish' |
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); |
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|
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return (int) $this->wpdb->get_var( $sql ); |
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} |
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|
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/** |
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* Courses waiting for review. |
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* |
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* @param StatisticsScope|null $scope |
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* @return int |
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*/ |
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private function count_pending_courses( ?StatisticsScope $scope ): int { |
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$where = $this->scope_condition( $scope, 'p.ID' ); |
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|
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$sql = $this->wpdb->prepare( |
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"SELECT COUNT(*) FROM {$this->tb_posts} AS p |
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WHERE p.post_type = %s AND p.post_status = %s {$where}", |
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LP_COURSE_CPT, |
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'pending' |
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); |
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|
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return (int) $this->wpdb->get_var( $sql ); |
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} |
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|
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/** |
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* Quizzes with a pass rate below the alert threshold, minimum attempts |
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* required so one failed try does not flag a quiz. |
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* |
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* Scope reaches the course through the section lineage |
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* ( quiz → section_items → sections → course ). |
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* |
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* @param StatisticsScope|null $scope |
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* @return int |
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*/ |
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private function count_low_pass_quizzes( ?StatisticsScope $scope ): int { |
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$threshold = (float) apply_filters( 'learn-press/statistics/quiz-pass-alert', 50 ); |
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$min_attempts = (int) apply_filters( 'learn-press/statistics/quiz-pass-alert-min-attempts', 5 ); |
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|
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$where = ''; |
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if ( $scope && ! $scope->is_empty() ) { |
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$course_conditions = $scope->sql_conditions( 's.section_course_id' ); |
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$where = " AND EXISTS ( |
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SELECT 1 FROM {$this->tb_lp_section_items} AS si |
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INNER JOIN {$this->tb_lp_sections} AS s ON s.section_id = si.section_id |
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WHERE si.item_id = ui.item_id {$course_conditions} |
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)"; |
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} |
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|
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$sql = $this->wpdb->prepare( |
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"SELECT COUNT(*) FROM ( |
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SELECT ui.item_id |
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FROM {$this->tb_lp_user_items} AS ui |
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WHERE ui.item_type = %s AND ui.graduation IN ( %s, %s ) {$where} |
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GROUP BY ui.item_id |
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HAVING COUNT(*) >= %d AND ( SUM( ui.graduation = %s ) / COUNT(*) ) * 100 < %f |
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) AS low_quizzes", |
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LP_QUIZ_CPT, |
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'passed', |
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'failed', |
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$min_attempts, |
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'passed', |
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$threshold |
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); |
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|
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return (int) $this->wpdb->get_var( $sql ); |
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} |
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} |
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|
