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<?php |
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if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly |
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|
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class WatuExam { |
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// keep the questions after submit in the same order they were show to the user |
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// and only the questions that were shown |
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function reorder_questions($questions, $orders) { |
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global $wpdb; |
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$new_questions = array(); |
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$qids = array(0); |
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foreach($questions as $question) $qids[] = $question->ID; |
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|
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// all answers in the quiz |
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$qids = array_map('intval', $qids); |
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$all_answers = $wpdb->get_results("SELECT ID,answer,correct, point, question_id |
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FROM ".WATU_ANSWERS." WHERE question_id IN (" . implode(',', $qids) . ")"); |
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$new_answers = array(); |
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|
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// reorder the answers accordingly to POST info |
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if(!empty($_POST['answer_ids'])) { |
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foreach($_POST['answer_ids'] as $aorder) { |
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$aorder = intval($aorder); |
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foreach($all_answers as $answer) { |
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if($answer->ID == $aorder) $new_answers[] = $answer; |
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} // end foreach answer |
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} // end foreach ID from post |
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} // end reordering answers |
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|
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// reorder the questions accordingly to POST info |
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foreach($orders as $order) { |
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foreach($questions as $question) { |
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// dump answers |
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$question_answers = array(); |
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foreach($new_answers as $answer) { |
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if($question->ID == $answer->question_id) $question_answers[] = $answer; |
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} |
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$question->answers = $question_answers; |
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if($question->ID == $order) $new_questions[] = $question; |
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} // end foreach question |
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} // end foreach orders (means question IDs ordered as POST var) |
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|
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$new_questions = apply_filters('watu-reorder-questions', $new_questions, $questions, $orders); |
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return $new_questions; |
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} |
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|
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// create one demo quiz when user first installs the plugin |
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static function create_demo() { |
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global $wpdb; |
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|
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// don't do this if the user has already created some quizzes (let's not disturb old users) |
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$num_quizzes = $wpdb->get_var("SELECT COUNT(ID) FROM ".WATU_EXAMS); |
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if($num_quizzes) { |
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update_option('watu_demo_quiz_created', '1', false); |
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return true; |
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} |
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|
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$final_screen = __("<p>Congratulations - you have completed %%QUIZ_NAME%%.</p>\n\n<p>You scored %%POINTS%% points out of %%MAX-POINTS%% points total.</p>\n\n<p>Your obtained grade is <b>%%GRADE-TITLE%%</b></p><p>%%GRADE-DESCRIPTION%%</p>", 'watu'); |
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|
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_EXAMS." SET |
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name=%s, description=%s, final_screen=%s, added_on = CURDATE(), show_answers=1", |
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__('Demo Quiz', 'watu'), __('This quiz is automatically created to help you get started. It will be created only once.','watu'), |
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$final_screen)); |
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$quiz_id = $wpdb->insert_id; |
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|
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// create 3 questions |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_QUESTIONS." SET |
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exam_id=%d, question=%s, answer_type=%s", $quiz_id, __("Select the correct answer:", 'watu'), 'radio')); |
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$qid = $wpdb->insert_id; |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_ANSWERS." SET |
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question_id=%d, answer=%s, correct='0', point=0, sort_order=1", |
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$qid, __('The Earth is a star', 'watu'))); |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_ANSWERS." SET |
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question_id=%d, answer=%s, correct='0', point=0, sort_order=2", |
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$qid, __('The Sun is a planet', 'watu'))); |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_ANSWERS." SET |
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question_id=%d, answer=%s, correct='1', point=1, sort_order=3", |
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$qid, __('The Earth is a planet', 'watu'))); |
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|
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_QUESTIONS." SET |
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exam_id=%d, question=%s, answer_type=%s", $quiz_id, __("Select all correct answers:", 'watu'), 'checkbox')); |
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$qid = $wpdb->insert_id; |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_ANSWERS." SET |
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question_id=%d, answer=%s, correct='1', point=1, sort_order=1", |
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$qid, __('WordPress is open source software', 'watu'))); |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_ANSWERS." SET |
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question_id=%d, answer=%s, correct='0', point=-1, sort_order=2", |
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$qid, __('There are no quiz plugins for WordPress', 'watu'))); |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_ANSWERS." SET |
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question_id=%d, answer=%s, correct='1', point=1, sort_order=3", |
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$qid, __('WordPress can be used for a lot more than blogging', 'watu'))); |
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|
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_QUESTIONS." SET |
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exam_id=%d, question=%s, answer_type=%s", $quiz_id, __("Do you have any comments about this quiz?", 'watu'), 'textarea')); |
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|
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// now add 2 grades |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_GRADES." SET |
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exam_id=%d, gtitle=%s, gdescription=%s, gfrom=-1, gto=1", |
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$quiz_id, __('Failed', 'watu'), __('Sorry, you could not collect enough points to pass this quiz', 'watu'))); |
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$wpdb->query($wpdb->prepare("INSERT INTO ".WATU_GRADES." SET |
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exam_id=%d, gtitle=%s, gdescription=%s, gfrom=2, gto=3", |
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$quiz_id, __('Passed', 'watu'), __('Congratulations, you passed!', 'watu'))); |
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|
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update_option('watu_demo_quiz_created', '1', false); |
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} |
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} |
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