ExerciseLib::get_number_students_answer_count()

Complexity

Conditions

12

Size

Total Lines	93
Code Lines	59

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    public static function get_number_students_answer_count(
        $answer_id,
        $question_id,
        $exercise_id,
        $courseId,
        $session_id,
        $question_type = null,
        $correct_answer = null,
        $current_answer = null
    ) {
        $track_exercises = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCISES);
        $track_attempt = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
        $courseTable = Database::get_main_table(TABLE_MAIN_COURSE);
        $courseUser = Database::get_main_table(TABLE_MAIN_COURSE_USER);
        $courseUserSession = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);

        $question_id = (int) $question_id;
        $answer_id = (int) $answer_id;
        $exercise_id = (int) $exercise_id;
        $courseId = (int) $courseId;
        $session_id = (int) $session_id;

        switch ($question_type) {
            case FILL_IN_BLANKS:
                $answer_condition = '';
                $select_condition = ' e.exe_id, answer ';
                break;
            case MATCHING:
            case MATCHING_DRAGGABLE:
            default:
                $answer_condition = " answer = $answer_id AND ";
                $select_condition = ' DISTINCT exe_user_id ';
        }

        if (empty($session_id)) {
            $courseCondition = "
            INNER JOIN $courseUser cu
            ON cu.c_id = c.id AND cu.user_id  = exe_user_id";
            $courseConditionWhere = " AND relation_type <> 2 AND cu.status = ".STUDENT;
        } else {
            $courseCondition = "
            INNER JOIN $courseUserSession cu
            ON cu.c_id = a.c_id AND cu.user_id = exe_user_id";
            $courseConditionWhere = ' AND cu.status = 0 ';
        }

        $sql = "SELECT $select_condition
    		FROM $track_exercises e
    		INNER JOIN $track_attempt a
    		ON (
    		    a.exe_id = e.exe_id AND
    		    e.c_id = a.c_id AND
    		    e.session_id  = a.session_id
            )
            INNER JOIN $courseTable c
            ON c.id = a.c_id
    		$courseCondition
    		WHERE
    		    exe_exo_id = $exercise_id AND
                a.c_id = $courseId AND
                e.session_id = $session_id AND
                $answer_condition
                question_id = $question_id AND
                e.status = ''
                $courseConditionWhere
            ";
        $result = Database::query($sql);
        $return = 0;
        if ($result) {

$result is of type Doctrine\DBAL\Driver\Statement, thus it always evaluated to true.

            $good_answers = 0;
            switch ($question_type) {
                case FILL_IN_BLANKS:
                    while ($row = Database::fetch_array($result, 'ASSOC')) {
                        $fill_blank = self::check_fill_in_blanks(
                            $correct_answer,
                            $row['answer'],
                            $current_answer
                        );
                        if (isset($fill_blank[$current_answer]) && $fill_blank[$current_answer] == 1) {
                            $good_answers++;
                        }
                    }

                    return $good_answers;
                    break;

break is not strictly necessary here and could be removed.

                case MATCHING:
                case MATCHING_DRAGGABLE:
                default:
                    $return = Database::num_rows($result);
            }
        }

        return $return;
    }