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111 lines
4.3 KiB
111 lines
4.3 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* @author Arnaud Ligot <arnaud@cblue.be>
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*
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* A small peace of code to enable user to access images included into survey
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* which are accessible by non authenticated users. This file is included
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* by document/download.php
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*/
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function check_download_survey($course, $invitation, $doc_url)
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{
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// Getting all the course information
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$_course = api_get_course_info($course);
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$course_id = $_course['real_id'];
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// Database table definitions
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$table_survey = Database::get_course_table(TABLE_SURVEY);
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$table_survey_question = Database::get_course_table(TABLE_SURVEY_QUESTION);
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$table_survey_question_option = Database::get_course_table(TABLE_SURVEY_QUESTION_OPTION);
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$table_survey_invitation = Database::get_course_table(TABLE_SURVEY_INVITATION);
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// Now we check if the invitationcode is valid
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$sql = "SELECT * FROM $table_survey_invitation
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WHERE
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c_id = $course_id AND
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invitation_code = '".Database::escape_string($invitation)."'";
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$result = Database::query($sql);
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if (Database::num_rows($result) < 1) {
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echo Display::return_message(get_lang('WrongInvitationCode'), 'error', false);
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exit;
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}
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$survey_invitation = Database::fetch_assoc($result);
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// Now we check if the user already filled the survey
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/*if ($survey_invitation['answered'] == 1) {
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echo Display::return_message(get_lang('YouAlreadyFilledThisSurvey'), 'error', false);
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exit;
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}*/
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// Very basic security check: check if a text field from
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// a survey/answer/option contains the name of the document requested
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// Fetch survey ID
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// If this is the case there will be a language choice
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$sql = "SELECT * FROM $table_survey
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WHERE
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c_id = $course_id AND
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code='".Database::escape_string($survey_invitation['survey_code'])."'";
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$result = Database::query($sql);
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if (Database::num_rows($result) > 1) {
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if ($_POST['language']) {
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$survey_invitation['survey_id'] = $_POST['language'];
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} else {
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echo '<form
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id="language"
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name="language"
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method="POST"
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action="'.api_get_self().'?course='.Security::remove_XSS($_GET['course']).'&invitationcode='.Security::remove_XSS($_GET['invitationcode']).'">';
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echo ' <select name="language">';
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while ($row = Database::fetch_assoc($result)) {
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echo '<option value="'.$row['survey_id'].'">'.$row['lang'].'</option>';
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}
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echo '</select>';
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echo ' <input type="submit" name="Submit" value="'.get_lang('Ok').'" />';
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echo '</form>';
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Display::display_footer();
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exit;
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}
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} else {
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$row = Database::fetch_assoc($result);
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$survey_invitation['survey_id'] = $row['survey_id'];
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}
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$doc_url = Database::escape_string($doc_url);
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$survey_invitation['survey_id'] = Database::escape_string($survey_invitation['survey_id']);
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$sql = "SELECT count(*)
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FROM $table_survey
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WHERE
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c_id = $course_id AND
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survey_id = ".$survey_invitation['survey_id']." AND (
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title LIKE '%$doc_url%'
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or subtitle LIKE '%$doc_url%'
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or intro LIKE '%$doc_url%'
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or surveythanks LIKE '%$doc_url%'
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)
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UNION
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SELECT count(*)
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FROM $table_survey_question
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WHERE
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c_id = $course_id AND
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survey_id = ".$survey_invitation['survey_id']." AND (
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survey_question LIKE '%$doc_url%' OR
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survey_question_comment LIKE '%$doc_url%'
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)
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UNION
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SELECT count(*)
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FROM $table_survey_question_option
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WHERE
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c_id = $course_id AND
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survey_id = ".$survey_invitation['survey_id']." AND (
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option_text LIKE '%$doc_url%'
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)";
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$result = Database::query($sql);
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if (Database::num_rows($result) == 0) {
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echo Display::return_message(get_lang('WrongInvitationCode'), 'error', false);
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exit;
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}
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return $_course;
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}
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