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lib.php
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lib.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Functions used by gradebook plugins and reports.
*
* @package moodlecore
* @copyright 2009 Petr Skoda and Nicolas Connault
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once $CFG->libdir.'/gradelib.php';
/**
* This class iterates over all users that are graded in a course.
* Returns detailed info about users and their grades.
*
* @author Petr Skoda <skodak@moodle.org>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class graded_users_iterator {
public $course;
public $grade_items;
public $groupid;
public $users_rs;
public $grades_rs;
public $gradestack;
public $sortfield1;
public $sortorder1;
public $sortfield2;
public $sortorder2;
/**
* Constructor
*
* @param object $course A course object
* @param array $grade_items array of grade items, if not specified only user info returned
* @param int $groupid iterate only group users if present
* @param string $sortfield1 The first field of the users table by which the array of users will be sorted
* @param string $sortorder1 The order in which the first sorting field will be sorted (ASC or DESC)
* @param string $sortfield2 The second field of the users table by which the array of users will be sorted
* @param string $sortorder2 The order in which the second sorting field will be sorted (ASC or DESC)
*/
public function graded_users_iterator($course, $grade_items=null, $groupid=0,
$sortfield1='lastname', $sortorder1='ASC',
$sortfield2='firstname', $sortorder2='ASC') {
$this->course = $course;
$this->grade_items = $grade_items;
$this->groupid = $groupid;
$this->sortfield1 = $sortfield1;
$this->sortorder1 = $sortorder1;
$this->sortfield2 = $sortfield2;
$this->sortorder2 = $sortorder2;
$this->gradestack = array();
}
/**
* Initialise the iterator
* @return boolean success
*/
public function init() {
global $CFG, $DB;
$this->close();
grade_regrade_final_grades($this->course->id);
$course_item = grade_item::fetch_course_item($this->course->id);
if ($course_item->needsupdate) {
// can not calculate all final grades - sorry
return false;
}
$coursecontext = get_context_instance(CONTEXT_COURSE, $this->course->id);
$relatedcontexts = get_related_contexts_string($coursecontext);
list($gradebookroles_sql, $params) =
$DB->get_in_or_equal(explode(',', $CFG->gradebookroles), SQL_PARAMS_NAMED, 'grbr');
//limit to users with an active enrolment
list($enrolledsql, $enrolledparams) = get_enrolled_sql($coursecontext);
$params = array_merge($params, $enrolledparams);
if ($this->groupid) {
$groupsql = "INNER JOIN {groups_members} gm ON gm.userid = u.id";
$groupwheresql = "AND gm.groupid = :groupid";
// $params contents: gradebookroles
$params['groupid'] = $this->groupid;
} else {
$groupsql = "";
$groupwheresql = "";
}
if (empty($this->sortfield1)) {
// we must do some sorting even if not specified
$ofields = ", u.id AS usrt";
$order = "usrt ASC";
} else {
$ofields = ", u.$this->sortfield1 AS usrt1";
$order = "usrt1 $this->sortorder1";
if (!empty($this->sortfield2)) {
$ofields .= ", u.$this->sortfield2 AS usrt2";
$order .= ", usrt2 $this->sortorder2";
}
if ($this->sortfield1 != 'id' and $this->sortfield2 != 'id') {
// user order MUST be the same in both queries,
// must include the only unique user->id if not already present
$ofields .= ", u.id AS usrt";
$order .= ", usrt ASC";
}
}
// $params contents: gradebookroles and groupid (for $groupwheresql)
$users_sql = "SELECT u.* $ofields
FROM {user} u
JOIN ($enrolledsql) je ON je.id = u.id
$groupsql
JOIN (
SELECT DISTINCT ra.userid
FROM {role_assignments} ra
WHERE ra.roleid $gradebookroles_sql
AND ra.contextid $relatedcontexts
) rainner ON rainner.userid = u.id
WHERE u.deleted = 0
$groupwheresql
ORDER BY $order";
$this->users_rs = $DB->get_recordset_sql($users_sql, $params);
if (!empty($this->grade_items)) {
$itemids = array_keys($this->grade_items);
list($itemidsql, $grades_params) = $DB->get_in_or_equal($itemids, SQL_PARAMS_NAMED, 'items');
$params = array_merge($params, $grades_params);
// $params contents: gradebookroles, enrolledparams, groupid (for $groupwheresql) and itemids
$grades_sql = "SELECT g.* $ofields
FROM {grade_grades} g
JOIN {user} u ON g.userid = u.id
JOIN ($enrolledsql) je ON je.id = u.id
$groupsql
JOIN (
SELECT DISTINCT ra.userid
FROM {role_assignments} ra
WHERE ra.roleid $gradebookroles_sql
AND ra.contextid $relatedcontexts
) rainner ON rainner.userid = u.id
WHERE u.deleted = 0
AND g.itemid $itemidsql
$groupwheresql
ORDER BY $order, g.itemid ASC";
$this->grades_rs = $DB->get_recordset_sql($grades_sql, $params);
} else {
$this->grades_rs = false;
}
return true;
}
/**
* Returns information about the next user
* @return mixed array of user info, all grades and feedback or null when no more users found
*/
function next_user() {
if (!$this->users_rs) {
return false; // no users present
}
if (!$this->users_rs->valid()) {
if ($current = $this->_pop()) {
// this is not good - user or grades updated between the two reads above :-(
}
return false; // no more users
} else {
$user = $this->users_rs->current();
$this->users_rs->next();
}
// find grades of this user
$grade_records = array();
while (true) {
if (!$current = $this->_pop()) {
break; // no more grades
}
if (empty($current->userid)) {
break;
}
if ($current->userid != $user->id) {
// grade of the next user, we have all for this user
$this->_push($current);
break;
}
$grade_records[$current->itemid] = $current;
}
$grades = array();
$feedbacks = array();
if (!empty($this->grade_items)) {
foreach ($this->grade_items as $grade_item) {
if (array_key_exists($grade_item->id, $grade_records)) {
$feedbacks[$grade_item->id]->feedback = $grade_records[$grade_item->id]->feedback;
$feedbacks[$grade_item->id]->feedbackformat = $grade_records[$grade_item->id]->feedbackformat;
unset($grade_records[$grade_item->id]->feedback);
unset($grade_records[$grade_item->id]->feedbackformat);
$grades[$grade_item->id] = new grade_grade($grade_records[$grade_item->id], false);
} else {
$feedbacks[$grade_item->id]->feedback = '';
$feedbacks[$grade_item->id]->feedbackformat = FORMAT_MOODLE;
$grades[$grade_item->id] =
new grade_grade(array('userid'=>$user->id, 'itemid'=>$grade_item->id), false);
}
}
}
$result = new stdClass();
$result->user = $user;
$result->grades = $grades;
$result->feedbacks = $feedbacks;
return $result;
}
/**
* Close the iterator, do not forget to call this function.
* @return void
*/
function close() {
if ($this->users_rs) {
$this->users_rs->close();
$this->users_rs = null;
}
if ($this->grades_rs) {
$this->grades_rs->close();
$this->grades_rs = null;
}
$this->gradestack = array();
}
/**
* _push
*
* @param grade_grade $grade Grade object
*
* @return void
*/
function _push($grade) {
array_push($this->gradestack, $grade);
}
/**
* _pop
*
* @return object current grade object
*/
function _pop() {
global $DB;
if (empty($this->gradestack)) {
if (!$this->grades_rs) {
return null; // no grades present
}
$current = $this->grades_rs->current();
$this->grades_rs->next();
return $current;
} else {
return array_pop($this->gradestack);
}
}
}
/**
* Print a selection popup form of the graded users in a course.
*
* @deprecated since 2.0
*
* @param int $course id of the course
* @param string $actionpage The page receiving the data from the popoup form
* @param int $userid id of the currently selected user (or 'all' if they are all selected)
* @param int $groupid id of requested group, 0 means all
* @param int $includeall bool include all option
* @param bool $return If true, will return the HTML, otherwise, will print directly
* @return null
*/
function print_graded_users_selector($course, $actionpage, $userid=0, $groupid=0, $includeall=true, $return=false) {
global $CFG, $USER, $OUTPUT;
return $OUTPUT->render(grade_get_graded_users_select(substr($actionpage, 0, strpos($actionpage, '/')), $course, $userid, $groupid, $includeall));
}
function grade_get_graded_users_select($report, $course, $userid, $groupid, $includeall) {
global $USER;
if (is_null($userid)) {
$userid = $USER->id;
}
$menu = array(); // Will be a list of userid => user name
$gui = new graded_users_iterator($course, null, $groupid);
$gui->init();
$label = get_string('selectauser', 'grades');
if ($includeall) {
$menu[0] = get_string('allusers', 'grades');
$label = get_string('selectalloroneuser', 'grades');
}
while ($userdata = $gui->next_user()) {
$user = $userdata->user;
$menu[$user->id] = fullname($user);
}
$gui->close();
if ($includeall) {
$menu[0] .= " (" . (count($menu) - 1) . ")";
}
$select = new single_select(new moodle_url('/grade/report/'.$report.'/index.php', array('id'=>$course->id)), 'userid', $menu, $userid);
$select->label = $label;
$select->formid = 'choosegradeuser';
return $select;
}
/**
* Print grading plugin selection popup form.
*
* @param array $plugin_info An array of plugins containing information for the selector
* @param boolean $return return as string
*
* @return nothing or string if $return true
*/
function print_grade_plugin_selector($plugin_info, $active_type, $active_plugin, $return=false) {
global $CFG, $OUTPUT, $PAGE;
$menu = array();
$count = 0;
$active = '';
foreach ($plugin_info as $plugin_type => $plugins) {
if ($plugin_type == 'strings') {
continue;
}
$first_plugin = reset($plugins);
$sectionname = $plugin_info['strings'][$plugin_type];
$section = array();
foreach ($plugins as $plugin) {
$link = $plugin->link->out(false);
$section[$link] = $plugin->string;
$count++;
if ($plugin_type === $active_type and $plugin->id === $active_plugin) {
$active = $link;
}
}
if ($section) {
$menu[] = array($sectionname=>$section);
}
}
// finally print/return the popup form
if ($count > 1) {
$select = new url_select($menu, $active, null, 'choosepluginreport');
if ($return) {
return $OUTPUT->render($select);
} else {
echo $OUTPUT->render($select);
}
} else {
// only one option - no plugin selector needed
return '';
}
}
/**
* Print grading plugin selection tab-based navigation.
*
* @param string $active_type type of plugin on current page - import, export, report or edit
* @param string $active_plugin active plugin type - grader, user, cvs, ...
* @param array $plugin_info Array of plugins
* @param boolean $return return as string
*
* @return nothing or string if $return true
*/
function grade_print_tabs($active_type, $active_plugin, $plugin_info, $return=false) {
global $CFG, $COURSE;
if (!isset($currenttab)) { //TODO: this is weird
$currenttab = '';
}
$tabs = array();
$top_row = array();
$bottom_row = array();
$inactive = array($active_plugin);
$activated = array();
$count = 0;
$active = '';
foreach ($plugin_info as $plugin_type => $plugins) {
if ($plugin_type == 'strings') {
continue;
}
// If $plugins is actually the definition of a child-less parent link:
if (!empty($plugins->id)) {
$string = $plugins->string;
if (!empty($plugin_info[$active_type]->parent)) {
$string = $plugin_info[$active_type]->parent->string;
}
$top_row[] = new tabobject($plugin_type, $plugins->link, $string);
continue;
}
$first_plugin = reset($plugins);
$url = $first_plugin->link;
if ($plugin_type == 'report') {
$url = $CFG->wwwroot.'/grade/report/index.php?id='.$COURSE->id;
}
$top_row[] = new tabobject($plugin_type, $url, $plugin_info['strings'][$plugin_type]);
if ($active_type == $plugin_type) {
foreach ($plugins as $plugin) {
$bottom_row[] = new tabobject($plugin->id, $plugin->link, $plugin->string);
if ($plugin->id == $active_plugin) {
$inactive = array($plugin->id);
}
}
}
}
$tabs[] = $top_row;
$tabs[] = $bottom_row;
if ($return) {
return print_tabs($tabs, $active_type, $inactive, $activated, true);
} else {
print_tabs($tabs, $active_type, $inactive, $activated);
}
}
/**
* grade_get_plugin_info
*
* @param int $courseid The course id
* @param string $active_type type of plugin on current page - import, export, report or edit
* @param string $active_plugin active plugin type - grader, user, cvs, ...
*
* @return array
*/
function grade_get_plugin_info($courseid, $active_type, $active_plugin) {
global $CFG, $SITE;
$context = get_context_instance(CONTEXT_COURSE, $courseid);
$plugin_info = array();
$count = 0;
$active = '';
$url_prefix = $CFG->wwwroot . '/grade/';
// Language strings
$plugin_info['strings'] = grade_helper::get_plugin_strings();
if ($reports = grade_helper::get_plugins_reports($courseid)) {
$plugin_info['report'] = $reports;
}
//showing grade categories and items make no sense if we're not within a course
if ($courseid!=$SITE->id) {
if ($edittree = grade_helper::get_info_edit_structure($courseid)) {
$plugin_info['edittree'] = $edittree;
}
}
if ($scale = grade_helper::get_info_scales($courseid)) {
$plugin_info['scale'] = array('view'=>$scale);
}
if ($outcomes = grade_helper::get_info_outcomes($courseid)) {
$plugin_info['outcome'] = $outcomes;
}
if ($letters = grade_helper::get_info_letters($courseid)) {
$plugin_info['letter'] = $letters;
}
if ($imports = grade_helper::get_plugins_import($courseid)) {
$plugin_info['import'] = $imports;
}
if ($exports = grade_helper::get_plugins_export($courseid)) {
$plugin_info['export'] = $exports;
}
foreach ($plugin_info as $plugin_type => $plugins) {
if (!empty($plugins->id) && $active_plugin == $plugins->id) {
$plugin_info['strings']['active_plugin_str'] = $plugins->string;
break;
}
foreach ($plugins as $plugin) {
if (is_a($plugin, 'grade_plugin_info')) {
if ($active_plugin == $plugin->id) {
$plugin_info['strings']['active_plugin_str'] = $plugin->string;
}
}
}
}
//hide course settings if we're not in a course
if ($courseid!=$SITE->id) {
if ($setting = grade_helper::get_info_manage_settings($courseid)) {
$plugin_info['settings'] = array('course'=>$setting);
}
}
// Put preferences last
if ($preferences = grade_helper::get_plugins_report_preferences($courseid)) {
$plugin_info['preferences'] = $preferences;
}
foreach ($plugin_info as $plugin_type => $plugins) {
if (!empty($plugins->id) && $active_plugin == $plugins->id) {
$plugin_info['strings']['active_plugin_str'] = $plugins->string;
break;
}
foreach ($plugins as $plugin) {
if (is_a($plugin, 'grade_plugin_info')) {
if ($active_plugin == $plugin->id) {
$plugin_info['strings']['active_plugin_str'] = $plugin->string;
}
}
}
}
return $plugin_info;
}
/**
* A simple class containing info about grade plugins.
* Can be subclassed for special rules
*
* @package moodlecore
* @copyright 2009 Nicolas Connault
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class grade_plugin_info {
/**
* A unique id for this plugin
*
* @var mixed
*/
public $id;
/**
* A URL to access this plugin
*
* @var mixed
*/
public $link;
/**
* The name of this plugin
*
* @var mixed
*/
public $string;
/**
* Another grade_plugin_info object, parent of the current one
*
* @var mixed
*/
public $parent;
/**
* Constructor
*
* @param int $id A unique id for this plugin
* @param string $link A URL to access this plugin
* @param string $string The name of this plugin
* @param object $parent Another grade_plugin_info object, parent of the current one
*
* @return void
*/
public function __construct($id, $link, $string, $parent=null) {
$this->id = $id;
$this->link = $link;
$this->string = $string;
$this->parent = $parent;
}
}
/**
* Prints the page headers, breadcrumb trail, page heading, (optional) dropdown navigation menu and
* (optional) navigation tabs for any gradebook page. All gradebook pages MUST use these functions
* in favour of the usual print_header(), print_header_simple(), print_heading() etc.
* !IMPORTANT! Use of tabs.php file in gradebook pages is forbidden unless tabs are switched off at
* the site level for the gradebook ($CFG->grade_navmethod = GRADE_NAVMETHOD_DROPDOWN).
*
* @param int $courseid Course id
* @param string $active_type The type of the current page (report, settings,
* import, export, scales, outcomes, letters)
* @param string $active_plugin The plugin of the current page (grader, fullview etc...)
* @param string $heading The heading of the page. Tries to guess if none is given
* @param boolean $return Whether to return (true) or echo (false) the HTML generated by this function
* @param string $bodytags Additional attributes that will be added to the <body> tag
* @param string $buttons Additional buttons to display on the page
*
* @return string HTML code or nothing if $return == false
*/
function print_grade_page_head($courseid, $active_type, $active_plugin=null,
$heading = false, $return=false,
$buttons=false, $shownavigation=true) {
global $CFG, $OUTPUT, $PAGE;
$plugin_info = grade_get_plugin_info($courseid, $active_type, $active_plugin);
// Determine the string of the active plugin
$stractive_plugin = ($active_plugin) ? $plugin_info['strings']['active_plugin_str'] : $heading;
$stractive_type = $plugin_info['strings'][$active_type];
if (empty($plugin_info[$active_type]->id) || !empty($plugin_info[$active_type]->parent)) {
$title = $PAGE->course->fullname.': ' . $stractive_type . ': ' . $stractive_plugin;
} else {
$title = $PAGE->course->fullname.': ' . $stractive_plugin;
}
if ($active_type == 'report') {
$PAGE->set_pagelayout('report');
} else {
$PAGE->set_pagelayout('admin');
}
$PAGE->set_title(get_string('grades') . ': ' . $stractive_type);
$PAGE->set_heading($title);
if ($buttons instanceof single_button) {
$buttons = $OUTPUT->render($buttons);
}
$PAGE->set_button($buttons);
grade_extend_settings($plugin_info, $courseid);
$returnval = $OUTPUT->header();
if (!$return) {
echo $returnval;
}
// Guess heading if not given explicitly
if (!$heading) {
$heading = $stractive_plugin;
}
if ($shownavigation) {
if ($CFG->grade_navmethod == GRADE_NAVMETHOD_COMBO || $CFG->grade_navmethod == GRADE_NAVMETHOD_DROPDOWN) {
$returnval .= print_grade_plugin_selector($plugin_info, $active_type, $active_plugin, $return);
}
$returnval .= $OUTPUT->heading($heading);
if ($CFG->grade_navmethod == GRADE_NAVMETHOD_COMBO || $CFG->grade_navmethod == GRADE_NAVMETHOD_TABS) {
$returnval .= grade_print_tabs($active_type, $active_plugin, $plugin_info, $return);
}
}
if ($return) {
return $returnval;
}
}
/**
* Utility class used for return tracking when using edit and other forms in grade plugins
*
* @package moodlecore
* @copyright 2009 Nicolas Connault
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class grade_plugin_return {
public $type;
public $plugin;
public $courseid;
public $userid;
public $page;
/**
* Constructor
*
* @param array $params - associative array with return parameters, if null parameter are taken from _GET or _POST
*/
public function grade_plugin_return($params = null) {
if (empty($params)) {
$this->type = optional_param('gpr_type', null, PARAM_SAFEDIR);
$this->plugin = optional_param('gpr_plugin', null, PARAM_SAFEDIR);
$this->courseid = optional_param('gpr_courseid', null, PARAM_INT);
$this->userid = optional_param('gpr_userid', null, PARAM_INT);
$this->page = optional_param('gpr_page', null, PARAM_INT);
} else {
foreach ($params as $key=>$value) {
if (property_exists($this, $key)) {
$this->$key = $value;
}
}
}
}
/**
* Returns return parameters as options array suitable for buttons.
* @return array options
*/
public function get_options() {
if (empty($this->type)) {
return array();
}
$params = array();
if (!empty($this->plugin)) {
$params['plugin'] = $this->plugin;
}
if (!empty($this->courseid)) {
$params['id'] = $this->courseid;
}
if (!empty($this->userid)) {
$params['userid'] = $this->userid;
}
if (!empty($this->page)) {
$params['page'] = $this->page;
}
return $params;
}
/**
* Returns return url
*
* @param string $default default url when params not set
* @param array $extras Extra URL parameters
*
* @return string url
*/
public function get_return_url($default, $extras=null) {
global $CFG;
if (empty($this->type) or empty($this->plugin)) {
return $default;
}
$url = $CFG->wwwroot.'/grade/'.$this->type.'/'.$this->plugin.'/index.php';
$glue = '?';
if (!empty($this->courseid)) {
$url .= $glue.'id='.$this->courseid;
$glue = '&';
}
if (!empty($this->userid)) {
$url .= $glue.'userid='.$this->userid;
$glue = '&';
}
if (!empty($this->page)) {
$url .= $glue.'page='.$this->page;
$glue = '&';
}
if (!empty($extras)) {
foreach ($extras as $key=>$value) {
$url .= $glue.$key.'='.$value;
$glue = '&';
}
}
return $url;
}
/**
* Returns string with hidden return tracking form elements.
* @return string
*/
public function get_form_fields() {
if (empty($this->type)) {
return '';
}
$result = '<input type="hidden" name="gpr_type" value="'.$this->type.'" />';
if (!empty($this->plugin)) {
$result .= '<input type="hidden" name="gpr_plugin" value="'.$this->plugin.'" />';
}
if (!empty($this->courseid)) {
$result .= '<input type="hidden" name="gpr_courseid" value="'.$this->courseid.'" />';
}
if (!empty($this->userid)) {
$result .= '<input type="hidden" name="gpr_userid" value="'.$this->userid.'" />';
}
if (!empty($this->page)) {
$result .= '<input type="hidden" name="gpr_page" value="'.$this->page.'" />';
}
}
/**
* Add hidden elements into mform
*
* @param object &$mform moodle form object
*
* @return void
*/
public function add_mform_elements(&$mform) {
if (empty($this->type)) {
return;
}
$mform->addElement('hidden', 'gpr_type', $this->type);
$mform->setType('gpr_type', PARAM_SAFEDIR);
if (!empty($this->plugin)) {
$mform->addElement('hidden', 'gpr_plugin', $this->plugin);
$mform->setType('gpr_plugin', PARAM_SAFEDIR);
}
if (!empty($this->courseid)) {
$mform->addElement('hidden', 'gpr_courseid', $this->courseid);
$mform->setType('gpr_courseid', PARAM_INT);
}
if (!empty($this->userid)) {
$mform->addElement('hidden', 'gpr_userid', $this->userid);
$mform->setType('gpr_userid', PARAM_INT);
}
if (!empty($this->page)) {
$mform->addElement('hidden', 'gpr_page', $this->page);
$mform->setType('gpr_page', PARAM_INT);
}
}
/**
* Add return tracking params into url
*
* @param moodle_url $url A URL
*
* @return string $url with return tracking params
*/
public function add_url_params(moodle_url $url) {
if (empty($this->type)) {
return $url;
}
$url->param('gpr_type', $this->type);
if (!empty($this->plugin)) {
$url->param('gpr_plugin', $this->plugin);
}
if (!empty($this->courseid)) {
$url->param('gpr_courseid' ,$this->courseid);
}
if (!empty($this->userid)) {
$url->param('gpr_userid', $this->userid);
}
if (!empty($this->page)) {
$url->param('gpr_page', $this->page);
}
return $url;
}
}
/**
* Function central to gradebook for building and printing the navigation (breadcrumb trail).
*
* @param string $path The path of the calling script (using __FILE__?)
* @param string $pagename The language string to use as the last part of the navigation (non-link)
* @param mixed $id Either a plain integer (assuming the key is 'id') or
* an array of keys and values (e.g courseid => $courseid, itemid...)
*
* @return string
*/
function grade_build_nav($path, $pagename=null, $id=null) {
global $CFG, $COURSE, $PAGE;
$strgrades = get_string('grades', 'grades');
// Parse the path and build navlinks from its elements
$dirroot_length = strlen($CFG->dirroot) + 1; // Add 1 for the first slash
$path = substr($path, $dirroot_length);
$path = str_replace('\\', '/', $path);
$path_elements = explode('/', $path);
$path_elements_count = count($path_elements);
// First link is always 'grade'
$PAGE->navbar->add($strgrades, new moodle_url('/grade/index.php', array('id'=>$COURSE->id)));
$link = null;
$numberofelements = 3;
// Prepare URL params string
$linkparams = array();
if (!is_null($id)) {
if (is_array($id)) {
foreach ($id as $idkey => $idvalue) {
$linkparams[$idkey] = $idvalue;
}
} else {
$linkparams['id'] = $id;
}
}
$navlink4 = null;
// Remove file extensions from filenames
foreach ($path_elements as $key => $filename) {
$path_elements[$key] = str_replace('.php', '', $filename);
}
// Second level links
switch ($path_elements[1]) {
case 'edit': // No link
if ($path_elements[3] != 'index.php') {
$numberofelements = 4;
}
break;
case 'import': // No link
break;
case 'export': // No link
break;
case 'report':
// $id is required for this link. Do not print it if $id isn't given
if (!is_null($id)) {
$link = new moodle_url('/grade/report/index.php', $linkparams);
}
if ($path_elements[2] == 'grader') {
$numberofelements = 4;
}
break;
default:
// If this element isn't among the ones already listed above, it isn't supported, throw an error.
debugging("grade_build_nav() doesn't support ". $path_elements[1] .
" as the second path element after 'grade'.");
return false;
}
$PAGE->navbar->add(get_string($path_elements[1], 'grades'), $link);
// Third level links
if (empty($pagename)) {
$pagename = get_string($path_elements[2], 'grades');
}
switch ($numberofelements) {
case 3:
$PAGE->navbar->add($pagename, $link);
break;
case 4:
if ($path_elements[2] == 'grader' AND $path_elements[3] != 'index.php') {
$PAGE->navbar->add(get_string('pluginname', 'gradereport_grader'), new moodle_url('/grade/report/grader/index.php', $linkparams));
}
$PAGE->navbar->add($pagename);
break;
}
return '';
}
/**
* General structure representing grade items in course
*
* @package moodlecore
* @copyright 2009 Nicolas Connault
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class grade_structure {