/**
 * Common setup for all pages for editing questions.
 * @param string $edittab code for this edit tab
 * @param boolean $requirecmid require cmid? default false
 * @param boolean $requirecourseid require courseid, if cmid is not given? default true
 * @return array $thispageurl, $contexts, $cmid, $cm, $module, $pagevars
 */
function question_edit_setup($edittab, $requirecmid = false, $requirecourseid = true)
{
    global $COURSE, $QUESTION_EDITTABCAPS;
    //$thispageurl is used to construct urls for all question edit pages we link to from this page. It contains an array
    //of parameters that are passed from page to page.
    $thispageurl = new moodle_url();
    if ($requirecmid) {
        $cmid = required_param('cmid', PARAM_INT);
    } else {
        $cmid = optional_param('cmid', 0, PARAM_INT);
    }
    if ($cmid) {
        list($module, $cm) = get_module_from_cmid($cmid);
        $courseid = $cm->course;
        $thispageurl->params(compact('cmid'));
        require_login($courseid, false, $cm);
        $thiscontext = get_context_instance(CONTEXT_MODULE, $cmid);
    } else {
        $module = null;
        $cm = null;
        if ($requirecourseid) {
            $courseid = required_param('courseid', PARAM_INT);
        } else {
            $courseid = optional_param('courseid', 0, PARAM_INT);
        }
        if ($courseid) {
            $thispageurl->params(compact('courseid'));
            require_login($courseid, false);
            $thiscontext = get_context_instance(CONTEXT_COURSE, $courseid);
        } else {
            $thiscontext = null;
        }
    }
    if ($thiscontext) {
        $contexts = new question_edit_contexts($thiscontext);
        $contexts->require_one_edit_tab_cap($edittab);
    } else {
        $contexts = null;
    }
    $pagevars['qpage'] = optional_param('qpage', -1, PARAM_INT);
    //pass 'cat' from page to page and when 'category' comes from a drop down menu
    //then we also reset the qpage so we go to page 1 of
    //a new cat.
    $pagevars['cat'] = optional_param('cat', 0, PARAM_SEQUENCE);
    // if empty will be set up later
    if ($category = optional_param('category', 0, PARAM_SEQUENCE)) {
        if ($pagevars['cat'] != $category) {
            // is this a move to a new category?
            $pagevars['cat'] = $category;
            $pagevars['qpage'] = 0;
        }
    }
    if ($pagevars['cat']) {
        $thispageurl->param('cat', $pagevars['cat']);
    }
    if ($pagevars['qpage'] > -1) {
        $thispageurl->param('qpage', $pagevars['qpage']);
    } else {
        $pagevars['qpage'] = 0;
    }
    $pagevars['qperpage'] = optional_param('qperpage', -1, PARAM_INT);
    if ($pagevars['qperpage'] > -1) {
        $thispageurl->param('qperpage', $pagevars['qperpage']);
    } else {
        $pagevars['qperpage'] = DEFAULT_QUESTIONS_PER_PAGE;
    }
    $sortoptions = array('alpha' => 'name, qtype ASC', 'typealpha' => 'qtype, name ASC', 'age' => 'id ASC');
    if ($sortorder = optional_param('qsortorder', '', PARAM_ALPHA)) {
        $pagevars['qsortorderdecoded'] = $sortoptions[$sortorder];
        $pagevars['qsortorder'] = $sortorder;
        $thispageurl->param('qsortorder', $sortorder);
    } else {
        $pagevars['qsortorderdecoded'] = $sortoptions['typealpha'];
        $pagevars['qsortorder'] = 'typealpha';
    }
    $defaultcategory = question_make_default_categories($contexts->all());
    $contextlistarr = array();
    foreach ($contexts->having_one_edit_tab_cap($edittab) as $context) {
        $contextlistarr[] = "'{$context->id}'";
    }
    $contextlist = join($contextlistarr, ' ,');
    if (!empty($pagevars['cat'])) {
        $catparts = explode(',', $pagevars['cat']);
        if (!$catparts[0] || FALSE !== array_search($catparts[1], $contextlistarr) || !count_records_select("question_categories", "id = '" . $catparts[0] . "' AND contextid = {$catparts['1']}")) {
            print_error('invalidcategory', 'quiz');
        }
    } else {
        $category = $defaultcategory;
        $pagevars['cat'] = "{$category->id},{$category->contextid}";
    }
    if (($recurse = optional_param('recurse', -1, PARAM_BOOL)) != -1) {
        $pagevars['recurse'] = $recurse;
        $thispageurl->param('recurse', $recurse);
//.........这里部分代码省略.........

 /**
  * Test the question category created event.
  */
 public function test_question_category_created()
 {
     $this->setAdminUser();
     $course = $this->getDataGenerator()->create_course();
     $quiz = $this->getDataGenerator()->create_module('quiz', array('course' => $course->id));
     $contexts = new question_edit_contexts(context_module::instance($quiz->cmid));
     $defaultcategoryobj = question_make_default_categories(array($contexts->lowest()));
     $defaultcategory = $defaultcategoryobj->id . ',' . $defaultcategoryobj->contextid;
     $qcobject = new question_category_object(1, new moodle_url('/mod/quiz/edit.php', array('cmid' => $quiz->cmid)), $contexts->having_one_edit_tab_cap('categories'), $defaultcategoryobj->id, $defaultcategory, null, $contexts->having_cap('moodle/question:add'));
     // Trigger and capture the event.
     $sink = $this->redirectEvents();
     $categoryid = $qcobject->add_category($defaultcategory, 'newcategory', '', true);
     $events = $sink->get_events();
     $event = reset($events);
     // Check that the event data is valid.
     $this->assertInstanceOf('\\core\\event\\question_category_created', $event);
     $this->assertEquals(context_module::instance($quiz->cmid), $event->get_context());
     $expected = array($course->id, 'quiz', 'addcategory', 'view.php?id=' . $quiz->cmid, $categoryid, $quiz->cmid);
     $this->assertEventLegacyLogData($expected, $event);
     $this->assertEventContextNotUsed($event);
 }

list($thispageurl, $contexts, $cmid, $cm, $module, $pagevars) = question_edit_setup('import', '/question/import.php');
// get display strings
$txt = new stdClass();
$txt->importerror = get_string('importerror', 'question');
$txt->importquestions = get_string('importquestions', 'question');
list($catid, $catcontext) = explode(',', $pagevars['cat']);
if (!($category = $DB->get_record("question_categories", array('id' => $catid)))) {
    print_error('nocategory', 'question');
}
$categorycontext = context::instance_by_id($category->contextid);
$category->context = $categorycontext;
//this page can be called without courseid or cmid in which case
//we get the context from the category object.
if ($contexts === null) {
    // need to get the course from the chosen category
    $contexts = new question_edit_contexts($categorycontext);
    $thiscontext = $contexts->lowest();
    if ($thiscontext->contextlevel == CONTEXT_COURSE) {
        require_login($thiscontext->instanceid, false);
    } elseif ($thiscontext->contextlevel == CONTEXT_MODULE) {
        list($module, $cm) = get_module_from_cmid($thiscontext->instanceid);
        require_login($cm->course, false, $cm);
    }
    $contexts->require_one_edit_tab_cap($edittab);
}
$PAGE->set_url($thispageurl);
$import_form = new question_import_form($thispageurl, array('contexts' => $contexts->having_one_edit_tab_cap('import'), 'defaultcategory' => $pagevars['cat']));
if ($import_form->is_cancelled()) {
    redirect($thispageurl);
}
//==========

/**
 * Called by pluginfile.php to serve files related to the 'question' core
 * component and for files belonging to qtypes.
 *
 * For files that relate to questions in a question_attempt, then we delegate to
 * a function in the component that owns the attempt (for example in the quiz,
 * or in core question preview) to get necessary inforation.
 *
 * (Note that, at the moment, all question file areas relate to questions in
 * attempts, so the If at the start of the last paragraph is always true.)
 *
 * Does not return, either calls send_file_not_found(); or serves the file.
 *
 * @package  core_question
 * @category files
 * @param stdClass $course course settings object
 * @param stdClass $context context object
 * @param string $component the name of the component we are serving files for.
 * @param string $filearea the name of the file area.
 * @param array $args the remaining bits of the file path.
 * @param bool $forcedownload whether the user must be forced to download the file.
 * @param array $options additional options affecting the file serving
 */
function question_pluginfile($course, $context, $component, $filearea, $args, $forcedownload, array $options = array())
{
    global $DB, $CFG;
    // Special case, sending a question bank export.
    if ($filearea === 'export') {
        list($context, $course, $cm) = get_context_info_array($context->id);
        require_login($course, false, $cm);
        require_once $CFG->dirroot . '/question/editlib.php';
        $contexts = new question_edit_contexts($context);
        // check export capability
        $contexts->require_one_edit_tab_cap('export');
        $category_id = (int) array_shift($args);
        $format = array_shift($args);
        $cattofile = array_shift($args);
        $contexttofile = array_shift($args);
        $filename = array_shift($args);
        // load parent class for import/export
        require_once $CFG->dirroot . '/question/format.php';
        require_once $CFG->dirroot . '/question/editlib.php';
        require_once $CFG->dirroot . '/question/format/' . $format . '/format.php';
        $classname = 'qformat_' . $format;
        if (!class_exists($classname)) {
            send_file_not_found();
        }
        $qformat = new $classname();
        if (!($category = $DB->get_record('question_categories', array('id' => $category_id)))) {
            send_file_not_found();
        }
        $qformat->setCategory($category);
        $qformat->setContexts($contexts->having_one_edit_tab_cap('export'));
        $qformat->setCourse($course);
        if ($cattofile == 'withcategories') {
            $qformat->setCattofile(true);
        } else {
            $qformat->setCattofile(false);
        }
        if ($contexttofile == 'withcontexts') {
            $qformat->setContexttofile(true);
        } else {
            $qformat->setContexttofile(false);
        }
        if (!$qformat->exportpreprocess()) {
            send_file_not_found();
            print_error('exporterror', 'question', $thispageurl->out());
        }
        // export data to moodle file pool
        if (!($content = $qformat->exportprocess(true))) {
            send_file_not_found();
        }
        send_file($content, $filename, 0, 0, true, true, $qformat->mime_type());
    }
    // Normal case, a file belonging to a question.
    $qubaidorpreview = array_shift($args);
    // Two sub-cases: 1. A question being previewed outside an attempt/usage.
    if ($qubaidorpreview === 'preview') {
        $previewcontextid = (int) array_shift($args);
        $previewcomponent = array_shift($args);
        $questionid = (int) array_shift($args);
        $previewcontext = context_helper::instance_by_id($previewcontextid);
        $result = component_callback($previewcomponent, 'question_preview_pluginfile', array($previewcontext, $questionid, $context, $component, $filearea, $args, $forcedownload, $options), 'newcallbackmissing');
        if ($result === 'newcallbackmissing' && ($filearea = 'questiontext')) {
            // Fall back to the legacy callback for backwards compatibility.
            debugging("Component {$previewcomponent} does not define the expected " . "{$previewcomponent}_question_preview_pluginfile callback. Falling back to the deprecated " . "{$previewcomponent}_questiontext_preview_pluginfile callback.", DEBUG_DEVELOPER);
            component_callback($previewcomponent, 'questiontext_preview_pluginfile', array($previewcontext, $questionid, $args, $forcedownload, $options));
        }
        send_file_not_found();
    }
    // 2. A question being attempted in the normal way.
    $qubaid = (int) $qubaidorpreview;
    $slot = (int) array_shift($args);
    $module = $DB->get_field('question_usages', 'component', array('id' => $qubaid));
    if ($module === 'core_question_preview') {
        require_once $CFG->dirroot . '/question/previewlib.php';
        return question_preview_question_pluginfile($course, $context, $component, $filearea, $qubaid, $slot, $args, $forcedownload, $options);
    } else {
        $dir = core_component::get_component_directory($module);
        if (!file_exists("{$dir}/lib.php")) {
//.........这里部分代码省略.........

/**
 * Print all the controls for adding questions directly into the
 * specific page in the edit tab of edit.php
 *
 * @param unknown_type $quiz
 * @param unknown_type $pageurl
 * @param unknown_type $page
 * @param unknown_type $hasattempts
 */
function quiz_print_pagecontrols($quiz, $pageurl, $page, $hasattempts)
{
    global $CFG;
    static $randombuttoncount = 0;
    $randombuttoncount++;
    echo '<div class="pagecontrols">';
    // Get the current context
    $thiscontext = get_context_instance(CONTEXT_COURSE, $quiz->course);
    $contexts = new question_edit_contexts($thiscontext);
    // Get the default category.
    $defaultcategory = question_make_default_categories($contexts->all());
    // Create the url the question page will return to
    $returnurl_addtoquiz = new moodle_url($pageurl->out(true), array('addonpage' => $page));
    // Print a button linking to the choose question type page.
    $newquestionparams = array('returnurl' => $returnurl_addtoquiz->out(false), 'cmid' => $quiz->cmid, 'appendqnumstring' => 'addquestion');
    create_new_question_button($defaultcategory->id, $newquestionparams, get_string('addaquestion', 'quiz'), get_string('createquestionandadd', 'quiz'), $hasattempts);
    if ($hasattempts) {
        $disabled = 'disabled="disabled"';
    } else {
        $disabled = '';
    }
    ?>
    <div class="singlebutton">
        <form class="randomquestionform" action="<?php 
    echo $CFG->wwwroot;
    ?>
/mod/quiz/addrandom.php" method="get">
            <div>
                <input type="hidden" class="addonpage_formelement" name="addonpage_form" value="<?php 
    echo $page;
    ?>
" />
                <input type="hidden" name="cmid" value="<?php 
    echo $quiz->cmid;
    ?>
" />
                <input type="hidden" name="courseid" value="<?php 
    echo $quiz->course;
    ?>
" />
                <input type="hidden" name="returnurl" value="<?php 
    echo urlencode($pageurl->out(true));
    ?>
" />
                <input type="submit" id="addrandomdialoglaunch_<?php 
    echo $randombuttoncount;
    ?>
" value="<?php 
    echo get_string('addarandomquestion', 'quiz');
    ?>
" <?php 
    echo " {$disabled}";
    ?>
 />
            </div>
        </form>
    </div>
    <?php 
    helpbutton('random', get_string('random', 'quiz'), 'quiz', true, false, '');
    ?>
    <?php 
    echo "\n</div>";
}

/**
 * Common setup for all pages for editing questions.
 * @param string $baseurl the name of the script calling this funciton. For examle 'qusetion/edit.php'.
 * @param string $edittab code for this edit tab
 * @param bool $requirecmid require cmid? default false
 * @param bool $requirecourseid require courseid, if cmid is not given? default true
 * @return array $thispageurl, $contexts, $cmid, $cm, $module, $pagevars
 */
function question_edit_setup($edittab, $baseurl, $requirecmid = false, $requirecourseid = true)
{
    global $DB, $PAGE;
    $thispageurl = new moodle_url($baseurl);
    $thispageurl->remove_all_params();
    // We are going to explicity add back everything important - this avoids unwanted params from being retained.
    if ($requirecmid) {
        $cmid = required_param('cmid', PARAM_INT);
    } else {
        $cmid = optional_param('cmid', 0, PARAM_INT);
    }
    if ($cmid) {
        list($module, $cm) = get_module_from_cmid($cmid);
        $courseid = $cm->course;
        $thispageurl->params(compact('cmid'));
        require_login($courseid, false, $cm);
        $thiscontext = context_module::instance($cmid);
    } else {
        $module = null;
        $cm = null;
        if ($requirecourseid) {
            $courseid = required_param('courseid', PARAM_INT);
        } else {
            $courseid = optional_param('courseid', 0, PARAM_INT);
        }
        if ($courseid) {
            $thispageurl->params(compact('courseid'));
            require_login($courseid, false);
            $thiscontext = context_course::instance($courseid);
        } else {
            $thiscontext = null;
        }
    }
    if ($thiscontext) {
        $contexts = new question_edit_contexts($thiscontext);
        $contexts->require_one_edit_tab_cap($edittab);
    } else {
        $contexts = null;
    }
    $PAGE->set_pagelayout('admin');
    $pagevars['qpage'] = optional_param('qpage', -1, PARAM_INT);
    //pass 'cat' from page to page and when 'category' comes from a drop down menu
    //then we also reset the qpage so we go to page 1 of
    //a new cat.
    $pagevars['cat'] = optional_param('cat', 0, PARAM_SEQUENCE);
    // if empty will be set up later
    if ($category = optional_param('category', 0, PARAM_SEQUENCE)) {
        if ($pagevars['cat'] != $category) {
            // is this a move to a new category?
            $pagevars['cat'] = $category;
            $pagevars['qpage'] = 0;
        }
    }
    if ($pagevars['cat']) {
        $thispageurl->param('cat', $pagevars['cat']);
    }
    if (strpos($baseurl, '/question/') === 0) {
        navigation_node::override_active_url($thispageurl);
    }
    if ($pagevars['qpage'] > -1) {
        $thispageurl->param('qpage', $pagevars['qpage']);
    } else {
        $pagevars['qpage'] = 0;
    }
    $pagevars['qperpage'] = question_get_display_preference('qperpage', DEFAULT_QUESTIONS_PER_PAGE, PARAM_INT, $thispageurl);
    for ($i = 1; $i <= question_bank_view::MAX_SORTS; $i++) {
        $param = 'qbs' . $i;
        if (!($sort = optional_param($param, '', PARAM_TEXT))) {
            break;
        }
        $thispageurl->param($param, $sort);
    }
    $defaultcategory = question_make_default_categories($contexts->all());
    $contextlistarr = array();
    foreach ($contexts->having_one_edit_tab_cap($edittab) as $context) {
        $contextlistarr[] = "'{$context->id}'";
    }
    $contextlist = join($contextlistarr, ' ,');
    if (!empty($pagevars['cat'])) {
        $catparts = explode(',', $pagevars['cat']);
        if (!$catparts[0] || false !== array_search($catparts[1], $contextlistarr) || !$DB->count_records_select("question_categories", "id = ? AND contextid = ?", array($catparts[0], $catparts[1]))) {
            print_error('invalidcategory', 'question');
        }
    } else {
        $category = $defaultcategory;
        $pagevars['cat'] = "{$category->id},{$category->contextid}";
    }
    // Display options.
    $pagevars['recurse'] = question_get_display_preference('recurse', 1, PARAM_BOOL, $thispageurl);
    $pagevars['showhidden'] = question_get_display_preference('showhidden', 0, PARAM_BOOL, $thispageurl);
    $pagevars['qbshowtext'] = question_get_display_preference('qbshowtext', 0, PARAM_BOOL, $thispageurl);
    // Category list page.
//.........这里部分代码省略.........

/**
 * Called by pluginfile.php to serve files related to the 'question' core
 * component and for files belonging to qtypes.
 *
 * For files that relate to questions in a question_attempt, then we delegate to
 * a function in the component that owns the attempt (for example in the quiz,
 * or in core question preview) to get necessary inforation.
 *
 * (Note that, at the moment, all question file areas relate to questions in
 * attempts, so the If at the start of the last paragraph is always true.)
 *
 * Does not return, either calls send_file_not_found(); or serves the file.
 *
 * @param object $course course settings object
 * @param object $context context object
 * @param string $component the name of the component we are serving files for.
 * @param string $filearea the name of the file area.
 * @param array $args the remaining bits of the file path.
 * @param bool $forcedownload whether the user must be forced to download the file.
 */
function question_pluginfile($course, $context, $component, $filearea, $args, $forcedownload)
{
    global $DB, $CFG;
    list($context, $course, $cm) = get_context_info_array($context->id);
    require_login($course, false, $cm);
    if ($filearea === 'export') {
        require_once $CFG->dirroot . '/question/editlib.php';
        $contexts = new question_edit_contexts($context);
        // check export capability
        $contexts->require_one_edit_tab_cap('export');
        $category_id = (int) array_shift($args);
        $format = array_shift($args);
        $cattofile = array_shift($args);
        $contexttofile = array_shift($args);
        $filename = array_shift($args);
        // load parent class for import/export
        require_once $CFG->dirroot . '/question/format.php';
        require_once $CFG->dirroot . '/question/editlib.php';
        require_once $CFG->dirroot . '/question/format/' . $format . '/format.php';
        $classname = 'qformat_' . $format;
        if (!class_exists($classname)) {
            send_file_not_found();
        }
        $qformat = new $classname();
        if (!($category = $DB->get_record('question_categories', array('id' => $category_id)))) {
            send_file_not_found();
        }
        $qformat->setCategory($category);
        $qformat->setContexts($contexts->having_one_edit_tab_cap('export'));
        $qformat->setCourse($course);
        if ($cattofile == 'withcategories') {
            $qformat->setCattofile(true);
        } else {
            $qformat->setCattofile(false);
        }
        if ($contexttofile == 'withcontexts') {
            $qformat->setContexttofile(true);
        } else {
            $qformat->setContexttofile(false);
        }
        if (!$qformat->exportpreprocess()) {
            send_file_not_found();
            print_error('exporterror', 'question', $thispageurl->out());
        }
        // export data to moodle file pool
        if (!($content = $qformat->exportprocess(true))) {
            send_file_not_found();
        }
        //DEBUG
        //echo '<textarea cols=90 rows=20>';
        //echo $content;
        //echo '</textarea>';
        //die;
        send_file($content, $filename, 0, 0, true, true, $qformat->mime_type());
    }
    $attemptid = (int) array_shift($args);
    $questionid = (int) array_shift($args);
    if ($attemptid === 0) {
        // preview
        require_once $CFG->dirroot . '/question/previewlib.php';
        return question_preview_question_pluginfile($course, $context, $component, $filearea, $attemptid, $questionid, $args, $forcedownload);
    } else {
        $module = $DB->get_field('question_attempts', 'modulename', array('id' => $attemptid));
        $dir = get_component_directory($module);
        if (!file_exists("{$dir}/lib.php")) {
            send_file_not_found();
        }
        include_once "{$dir}/lib.php";
        $filefunction = $module . '_question_pluginfile';
        if (!function_exists($filefunction)) {
            send_file_not_found();
        }
        $filefunction($course, $context, $component, $filearea, $attemptid, $questionid, $args, $forcedownload);
        send_file_not_found();
    }
}

/**
 * Common setup for all pages for editing questions.
 * @param string $baseurl the name of the script calling this funciton. For examle 'qusetion/edit.php'.
 * @param string $edittab code for this edit tab
 * @param bool $requirecmid require cmid? default false
 * @param bool $requirecourseid require courseid, if cmid is not given? default true
 * @return array $thispageurl, $contexts, $cmid, $cm, $module, $pagevars
 */
function question_edit_setup($edittab, $baseurl, $requirecmid = false, $requirecourseid = true)
{
    global $DB, $PAGE;
    $thispageurl = new moodle_url($baseurl);
    $thispageurl->remove_all_params();
    // We are going to explicity add back everything important - this avoids unwanted params from being retained.
    if ($requirecmid) {
        $cmid = required_param('cmid', PARAM_INT);
    } else {
        $cmid = optional_param('cmid', 0, PARAM_INT);
    }
    if ($cmid) {
        list($module, $cm) = get_module_from_cmid($cmid);
        $courseid = $cm->course;
        $thispageurl->params(compact('cmid'));
        require_login($courseid, false, $cm);
        $thiscontext = get_context_instance(CONTEXT_MODULE, $cmid);
    } else {
        $module = null;
        $cm = null;
        if ($requirecourseid) {
            $courseid = required_param('courseid', PARAM_INT);
        } else {
            $courseid = optional_param('courseid', 0, PARAM_INT);
        }
        if ($courseid) {
            $thispageurl->params(compact('courseid'));
            require_login($courseid, false);
            $thiscontext = get_context_instance(CONTEXT_COURSE, $courseid);
        } else {
            $thiscontext = null;
        }
    }
    if ($thiscontext) {
        $contexts = new question_edit_contexts($thiscontext);
        $contexts->require_one_edit_tab_cap($edittab);
    } else {
        $contexts = null;
    }
    $PAGE->set_pagelayout('admin');
    $pagevars['qpage'] = optional_param('qpage', -1, PARAM_INT);
    //pass 'cat' from page to page and when 'category' comes from a drop down menu
    //then we also reset the qpage so we go to page 1 of
    //a new cat.
    $pagevars['cat'] = optional_param('cat', 0, PARAM_SEQUENCE);
    // if empty will be set up later
    if ($category = optional_param('category', 0, PARAM_SEQUENCE)) {
        if ($pagevars['cat'] != $category) {
            // is this a move to a new category?
            $pagevars['cat'] = $category;
            $pagevars['qpage'] = 0;
        }
    }
    if ($pagevars['cat']) {
        $thispageurl->param('cat', $pagevars['cat']);
    }
    if (strpos($baseurl, '/question/') === 0) {
        navigation_node::override_active_url($thispageurl);
    }
    if ($pagevars['qpage'] > -1) {
        $thispageurl->param('qpage', $pagevars['qpage']);
    } else {
        $pagevars['qpage'] = 0;
    }
    $pagevars['qperpage'] = optional_param('qperpage', -1, PARAM_INT);
    if ($pagevars['qperpage'] > -1) {
        $thispageurl->param('qperpage', $pagevars['qperpage']);
    } else {
        $pagevars['qperpage'] = DEFAULT_QUESTIONS_PER_PAGE;
    }
    $sortoptions = array('alpha' => 'name, qtype ASC', 'typealpha' => 'qtype, name ASC', 'age' => 'id ASC');
    if ($sortorder = optional_param('qsortorder', '', PARAM_ALPHA)) {
        $pagevars['qsortorderdecoded'] = $sortoptions[$sortorder];
        $pagevars['qsortorder'] = $sortorder;
        $thispageurl->param('qsortorder', $sortorder);
    } else {
        $pagevars['qsortorderdecoded'] = $sortoptions['typealpha'];
        $pagevars['qsortorder'] = 'typealpha';
    }
    $defaultcategory = question_make_default_categories($contexts->all());
    $contextlistarr = array();
    foreach ($contexts->having_one_edit_tab_cap($edittab) as $context) {
        $contextlistarr[] = "'{$context->id}'";
    }
    $contextlist = join($contextlistarr, ' ,');
    if (!empty($pagevars['cat'])) {
        $catparts = explode(',', $pagevars['cat']);
        if (!$catparts[0] || false !== array_search($catparts[1], $contextlistarr) || !$DB->count_records_select("question_categories", "id = ? AND contextid = ?", array($catparts[0], $catparts[1]))) {
            print_error('invalidcategory', 'question');
        }
    } else {
        $category = $defaultcategory;
//.........这里部分代码省略.........

 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package quiz
 */
require_once "../../config.php";
require_once "locallib.php";
$id = required_param('id', PARAM_INT);
if (!($course = $DB->get_record('course', array('id' => $id)))) {
    print_error('invalidcourseid');
}
$coursecontext = get_context_instance(CONTEXT_COURSE, $id);
require_login($course->id);
add_to_log($course->id, "quiz", "view all", "index.php?id={$course->id}", "");
// Print the header
$strquizzes = get_string("modulenameplural", "quiz");
$streditquestions = '';
$editqcontexts = new question_edit_contexts($coursecontext);
if ($editqcontexts->have_one_edit_tab_cap('questions')) {
    $streditquestions = "<form target=\"_parent\" method=\"get\" action=\"{$CFG->wwwroot}/question/edit.php\">\n                   <div>\n                   <input type=\"hidden\" name=\"courseid\" value=\"{$course->id}\" />\n                   <input type=\"submit\" value=\"" . get_string("editquestions", "quiz") . "\" />\n                   </div>\n                 </form>";
}
$navlinks = array();
$navlinks[] = array('name' => $strquizzes, 'link' => '', 'type' => 'activity');
$navigation = build_navigation($navlinks);
print_header_simple($strquizzes, '', $navigation, '', '', true, $streditquestions, navmenu($course));
// Get all the appropriate data
if (!($quizzes = get_all_instances_in_course("quiz", $course))) {
    notice(get_string('thereareno', 'moodle', $strquizzes), "../../course/view.php?id={$course->id}");
    die;
}
// Configure table for displaying the list of instances.
$headings = array(get_string('name'), get_string('quizcloses', 'quiz'));
$align = array('left', 'left');

 /**
  * Return random question form.
  * @param \moodle_url $thispageurl the canonical URL of this page.
  * @param \question_edit_contexts $contexts the relevant question bank contexts.
  * @param array $pagevars the variables from {@link \question_edit_setup()}.
  * @return string HTML to output.
  */
 protected function random_question_form(\moodle_url $thispageurl, \question_edit_contexts $contexts, array $pagevars)
 {
     if (!$contexts->have_cap('moodle/question:useall')) {
         return '';
     }
     $randomform = new \quiz_add_random_form(new \moodle_url('/mod/quiz/addrandom.php'), array('contexts' => $contexts, 'cat' => $pagevars['cat']));
     $randomform->set_data(array('category' => $pagevars['cat'], 'returnurl' => $thispageurl->out_as_local_url(true), 'randomnumber' => 1, 'cmid' => $thispageurl->param('cmid')));
     return html_writer::div($randomform->render(), 'randomquestionformforpopup');
 }

if (empty($quiz)) {
    if (empty($attemptobj)) {
        print_error('cannotcallscript');
    }
    $quiz = $attemptobj->get_quiz();
    $cm = $attemptobj->get_cm();
}
if (!isset($currenttab)) {
    $currenttab = '';
}
if (!isset($cm)) {
    $cm = get_coursemodule_from_instance('quiz', $quiz->id);
}
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
if (!isset($contexts)) {
    $contexts = new question_edit_contexts($context);
}
$tabs = array();
$row = array();
$inactive = array();
$activated = array();
$stredit = get_string('edit');
if (has_capability('mod/quiz:view', $context)) {
    $row[] = new tabobject('info', "{$CFG->wwwroot}/mod/quiz/view.php?id={$cm->id}", get_string('info', 'quiz'));
}
if (has_capability('mod/quiz:viewreports', $context)) {
    $row[] = new tabobject('reports', "{$CFG->wwwroot}/mod/quiz/report.php?q={$quiz->id}", get_string('results', 'quiz'));
}
if (has_capability('mod/quiz:preview', $context)) {
    $strpreview = get_string('preview', 'quiz');
    $row[] = new tabobject('preview', "{$CFG->wwwroot}/mod/quiz/startattempt.php?cmid={$cm->id}&amp;sesskey=" . sesskey(), "<img src=\"{$CFG->pixpath}/t/preview.gif\" class=\"iconsmall\" alt=\"{$strpreview}\" /> {$strpreview}", $strpreview);

 * @author Tim Hunt and others.
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package quiz
 */
if (empty($quiz)) {
    error('You cannot call this script in that way');
}
if (!isset($currenttab)) {
    $currenttab = '';
}
if (!isset($cm)) {
    $cm = get_coursemodule_from_instance('quiz', $quiz->id);
}
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
if (!isset($contexts)) {
    $contexts = new question_edit_contexts($context);
}
$tabs = array();
$row = array();
$inactive = array();
$activated = array();
if (has_capability('mod/quiz:view', $context)) {
    $row[] = new tabobject('info', "{$CFG->wwwroot}/mod/quiz/view.php?q={$quiz->id}", get_string('info', 'quiz'));
}
if (has_capability('mod/quiz:viewreports', $context)) {
    $row[] = new tabobject('reports', "{$CFG->wwwroot}/mod/quiz/report.php?q={$quiz->id}", get_string('results', 'quiz'));
}
if (has_capability('mod/quiz:preview', $context)) {
    $row[] = new tabobject('preview', "{$CFG->wwwroot}/mod/quiz/attempt.php?q={$quiz->id}", get_string('preview', 'quiz'));
}
if (has_capability('mod/quiz:manage', $context)) {

function load_questions($category, $importfilename, $contextid)
{
    // Load all the questions from the given import file into the given category
    // The category from the import file will be ignored if present.
    global $COURSE;
    $qformat = new qformat_xml();
    $qformat->setCategory($category);
    $systemcontext = context::instance_by_id($contextid);
    $contexts = new question_edit_contexts($systemcontext);
    $qformat->setContexts($contexts->having_one_edit_tab_cap('import'));
    $qformat->setCourse($COURSE);
    $qformat->setFilename($importfilename);
    $qformat->setRealfilename($importfilename);
    $qformat->setMatchgrades('error');
    $qformat->setCatfromfile(false);
    $qformat->setContextfromfile(false);
    $qformat->setStoponerror(true);
    // Do anything before that we need to
    if (!$qformat->importpreprocess()) {
        throw new coding_exception('Upgrade failed: error preprocessing prototype upload');
    }
    // Process the given file
    if (!$qformat->importprocess($category)) {
        throw new coding_exception('Upgrade failed: error uploading prototype questions');
    }
    // In case anything needs to be done after
    if (!$qformat->importpostprocess()) {
        throw new coding_exception('Upgrade failed: error postprocessing prototype upload');
    }
}

 * @author Tim Hunt and others.
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package quiz
 */
if (empty($quiz)) {
    error('You cannot call this script in that way');
}
if (!isset($currenttab)) {
    $currenttab = '';
}
if (!isset($cm)) {
    $cm = get_coursemodule_from_instance('quiz', $quiz->id);
}
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
if (!isset($contexts)) {
    $contexts = new question_edit_contexts($context);
}
$tabs = array();
$row = array();
$inactive = array();
$activated = array();
if (has_capability('mod/quiz:view', $context)) {
    $row[] = new tabobject('info', "{$CFG->wwwroot}/mod/quiz/view.php?q={$quiz->id}", get_string('info', 'quiz'));
}
if (has_capability('mod/quiz:viewreports', $context)) {
    $row[] = new tabobject('reports', "{$CFG->wwwroot}/mod/quiz/report.php?q={$quiz->id}", get_string('results', 'quiz'));
}
if (has_capability('mod/quiz:preview', $context)) {
    $row[] = new tabobject('preview', "{$CFG->wwwroot}/mod/quiz/attempt.php?q={$quiz->id}", get_string('preview', 'quiz'));
}
if ($contexts->have_one_edit_tab_cap('editq')) {

/**
 * @param array $row tab objects
 * @param question_edit_contexts $contexts object representing contexts available from this context
 * @param string $querystring to append to urls
 * */
function questionbank_navigation_tabs(&$row, $contexts, $querystring)
{
    global $CFG, $QUESTION_EDITTABCAPS;
    $tabs = array('questions' => array("{$CFG->wwwroot}/question/edit.php?{$querystring}", get_string('questions', 'quiz'), get_string('editquestions', 'quiz')), 'categories' => array("{$CFG->wwwroot}/question/category.php?{$querystring}", get_string('categories', 'quiz'), get_string('editqcats', 'quiz')), 'import' => array("{$CFG->wwwroot}/question/import.php?{$querystring}", get_string('import', 'quiz'), get_string('importquestions', 'quiz')), 'export' => array("{$CFG->wwwroot}/question/export.php?{$querystring}", get_string('export', 'quiz'), get_string('exportquestions', 'quiz')));
    foreach ($tabs as $tabname => $tabparams) {
        if ($contexts->have_one_edit_tab_cap($tabname)) {
            $row[] = new tabobject($tabname, $tabparams[0], $tabparams[1], $tabparams[2]);
        }
    }
}

function game_get_contexts()
{
    global $CFG, $COURSE;
    require $CFG->dirroot . '/question/editlib.php';
    $thiscontext = get_context_instance(CONTEXT_COURSE, $COURSE->id);
    $contexts = new question_edit_contexts($thiscontext);
    $caps = array('moodle/question:viewmine', 'moodle/question:viewall');
    return $contexts->having_one_cap($caps);
}

/**
 * Called by pluginfile.php to serve files related to the 'question' core
 * component and for files belonging to qtypes.
 *
 * For files that relate to questions in a question_attempt, then we delegate to
 * a function in the component that owns the attempt (for example in the quiz,
 * or in core question preview) to get necessary inforation.
 *
 * (Note that, at the moment, all question file areas relate to questions in
 * attempts, so the If at the start of the last paragraph is always true.)
 *
 * Does not return, either calls send_file_not_found(); or serves the file.
 *
 * @package  core_question
 * @category files
 * @param stdClass $course course settings object
 * @param stdClass $context context object
 * @param string $component the name of the component we are serving files for.
 * @param string $filearea the name of the file area.
 * @param array $args the remaining bits of the file path.
 * @param bool $forcedownload whether the user must be forced to download the file.
 * @param array $options additional options affecting the file serving
 */
function question_pluginfile($course, $context, $component, $filearea, $args, $forcedownload, array $options = array())
{
    global $DB, $CFG;
    if ($filearea === 'questiontext_preview') {
        $component = array_shift($args);
        $questionid = array_shift($args);
        component_callback($component, 'questiontext_preview_pluginfile', array($context, $questionid, $args, $forcedownload, $options));
        send_file_not_found();
    }
    if ($filearea === 'export') {
        list($context, $course, $cm) = get_context_info_array($context->id);
        require_login($course, false, $cm);
        require_once $CFG->dirroot . '/question/editlib.php';
        $contexts = new question_edit_contexts($context);
        // check export capability
        $contexts->require_one_edit_tab_cap('export');
        $category_id = (int) array_shift($args);
        $format = array_shift($args);
        $cattofile = array_shift($args);
        $contexttofile = array_shift($args);
        $filename = array_shift($args);
        // load parent class for import/export
        require_once $CFG->dirroot . '/question/format.php';
        require_once $CFG->dirroot . '/question/editlib.php';
        require_once $CFG->dirroot . '/question/format/' . $format . '/format.php';
        $classname = 'qformat_' . $format;