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qtypes.php
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qtypes.php
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<?PHP // $Id$
// Allows the admin to manage question types.
require_once(dirname(__FILE__) . '/../config.php');
require_once($CFG->libdir . '/questionlib.php');
require_once($CFG->libdir . '/adminlib.php');
require_once($CFG->libdir . '/tablelib.php');
/// Check permissions.
require_login();
$systemcontext = get_context_instance(CONTEXT_SYSTEM);
require_capability('moodle/question:config', $systemcontext);
$canviewreports = has_capability('report/questioninstances:view', $systemcontext);
admin_externalpage_setup('manageqtypes');
/// Get some data we will need.
$counts = $DB->get_records_sql("
SELECT qtype, COUNT(1) as numquestions, SUM(hidden) as numhidden
FROM {question} GROUP BY qtype", array());
$needed = array();
foreach ($QTYPES as $qtypename => $qtype) {
if (!isset($counts[$qtypename])) {
$counts[$qtypename] = new stdClass;
$counts[$qtypename]->numquestions = 0;
$counts[$qtypename]->numhidden = 0;
}
$needed[$qtypename] = $counts[$qtypename]->numquestions > 0;
$counts[$qtypename]->numquestions -= $counts[$qtypename]->numhidden;
}
$needed['missingtype'] = true; // The system needs the missing question type.
foreach ($QTYPES as $qtypename => $qtype) {
foreach ($qtype->requires_qtypes() as $reqtype) {
$needed[$reqtype] = true;
}
}
foreach ($counts as $qtypename => $count) {
if (!isset($QTYPES[$qtypename])) {
$counts['missingtype']->numquestions += $count->numquestions - $count->numhidden;
$counts['missingtype']->numhidden += $count->numhidden;
}
}
// Process any actions.
$delete = optional_param('delete', '', PARAM_SAFEDIR);
$confirm = optional_param('confirm', '', PARAM_BOOL);
if (!empty($delete) and confirm_sesskey()) {
// Check it is OK to delete this question type.
if ($delete == 'missingtype') {
print_error('cannotdeletemissingqtype', 'admin', admin_url('qtypes.php'));
}
if (!isset($QTYPES[$delete])) {
print_error('unknownquestiontype', 'question', admin_url('qtypes.php'), $delete);
}
$qtypename = $QTYPES[$delete]->local_name();
if ($counts[$delete]->numquestions + $counts[$delete]->numhidden > 0) {
print_error('cannotdeleteqtypeinuse', 'admin', admin_url('qtypes.php'), $qtypename);
}
if ($needed[$delete] > 0) {
print_error('cannotdeleteqtypeneeded', 'admin', admin_url('qtypes.php'), $qtypename);
}
// If not yet confirmed, display a confirmation message.
if (!$confirm) {
$qytpename = $QTYPES[$delete]->local_name();
admin_externalpage_print_header();
print_heading(get_string('deleteqtypeareyousure', 'admin', $qytpename));
notice_yesno(get_string('deleteqtypeareyousuremessage', 'admin', $qytpename),
admin_url('qtypes.php?delete=' . $delete . '&confirm=1&sesskey=' . sesskey()),
admin_url('qtypes.php'), NULL, NULL, 'post', 'get');
admin_externalpage_print_footer();
exit;
}
// Do the deletion.
admin_externalpage_print_header();
print_heading(get_string('deletingqtype', 'admin', $qtypename));
// Delete any configuration records.
if (!unset_all_config_for_plugin('qtype_' . $delete)) {
notify(get_string('errordeletingconfig', 'admin', 'qtype_' . $delete));
}
// Then the tables themselves
if (!drop_plugin_tables($delete, $QTYPES[$delete]->plugin_dir() . '/db/install.xml', false)) {
}
// Delete the capabilities that were defined by this module
capabilities_cleanup('qtype/' . $delete);
// Remove event handlers and dequeue pending events
events_uninstall('qtype/' . $delete);
$a->qtype = $qtypename;
$a->directory = $QTYPES[$delete]->plugin_dir();
print_box(get_string('qtypedeletefiles', 'admin', $a), 'generalbox', 'notice');
print_continue(admin_url('qtypes.php'));
admin_externalpage_print_footer();
exit;
}
/// Print the page heading.
admin_externalpage_print_header();
print_heading(get_string('manageqtypes', 'admin'));
/// Set up the table.
$table = new flexible_table('qtypeadmintable');
$table->define_columns(array('questiontype', 'numquestions', 'version', 'requires',
'availableto', 'delete', 'settings'));
$table->define_headers(array(get_string('questiontype', 'admin'), get_string('numquestions', 'admin'),
get_string('version'), get_string('requires', 'admin'), get_string('availableto', 'admin'),
get_string('delete'), get_string('settings')));
$table->set_attribute('id', 'qtypes');
$table->set_attribute('class', 'generaltable generalbox boxaligncenter boxwidthwide');
$table->setup();
/// Add a row for each question type.
foreach ($QTYPES as $qtypename => $qtype) {
$row = array();
// Question icon and name.
$fakequestion = new stdClass;
$fakequestion->qtype = $qtypename;
$icon = print_question_icon($fakequestion, true);
$row[] = $icon . ' ' . $qtype->local_name();
// Number of questions of this type.
if ($counts[$qtypename]->numquestions + $counts[$qtypename]->numhidden > 0) {
if ($counts[$qtypename]->numhidden > 0) {
$strcount = get_string('numquestionsandhidden', 'admin', $counts[$qtypename]);
} else {
$strcount = $counts[$qtypename]->numquestions;
}
if ($canviewreports) {
$row[] = '<a href="' . admin_url('/report/questioninstances/index.php?qtype=' . $qtypename) .
'" title="' . get_string('showdetails', 'admin') . '">' . $strcount . '</a>';
} else {
$strcount;
}
} else {
$row[] = 0;
}
// Question version number.
$version = get_config('qtype_' . $qtypename, 'version');
if ($version) {
$row[] = $version;
} else {
$row[] = '<span class="disabled">' . get_string('nodatabase', 'admin') . '</span>';
}
// Other question types required by this one.
$requiredtypes = $qtype->requires_qtypes();
$strtypes = array();
if (!empty($requiredtypes)) {
foreach ($requiredtypes as $required) {
$strtypes[] = $QTYPES[$required]->local_name();
}
$row[] = implode(', ', $strtypes);
} else {
$row[] = '';
}
// Who is allowed to create this question type.
// TODO $addcapability = 'qtype/' . $qtypename . ':add';
$addcapability = 'moodle/question:add';
$adderroles = get_roles_with_capability($addcapability, CAP_ALLOW, $systemcontext);
$hasoverrides = $DB->record_exists_select('role_capabilities',
'capability = ? AND contextid <> ?', array($addcapability, $systemcontext->id));
$rolelinks = array();
foreach ($adderroles as $role) {
$rolelinks[] = '<a href="' . admin_url('roles/manage.php?action=view&roleid=' . $role->id) .
'" title="' . get_string('editrole', 'role') . '">' . $role->name . '</a>';
}
$rolelinks = implode(', ', $rolelinks);
if (!$rolelinks) {
$rolelinks = get_string('noroles', 'admin');
}
if ($hasoverrides) {
$a = new stdClass;
$a->roles = $rolelinks;
$a->exceptions = '<a href="' . admin_url('report/capability/index.php?capability=' .
$addcapability) . '#report" title = "' . get_string('showdetails', 'admin') . '">' .
get_string('exceptions', 'admin') . '</a>';
$rolelinks = get_string('roleswithexceptions', 'admin', $a) ;
}
if (empty($adderroles) && !$hasoverrides) {
$rolelinks = '<span class="disabled">' . $rolelinks . '</span>';
}
$row[] = $rolelinks;
// Delete link, if available.
if ($needed[$qtypename]) {
$row[] = '';
} else {
$row[] = '<a href="' . admin_url('qtypes.php?delete=' . $qtypename .
'&sesskey=' . sesskey()) . '" title="' .
get_string('uninstallqtype', 'admin') . '">' . get_string('delete') . '</a>';
}
// Settings link, if available.
if (file_exists($qtype->plugin_dir() . '/settings.php')) {
$row[] = '<a href="' . admin_url('settings.php?section=qtypesetting' . $qtypename) .
'">' . get_string('settings') . '</a>';
} else {
$row[] = '';
}
$table->add_data($row);
}
$table->print_html();
admin_externalpage_print_footer();
function admin_url($endbit) {
global $CFG;
return $CFG->wwwroot . '/' . $CFG->admin . '/' . $endbit;
}
?>