protected function resolve_theme() {
        global $CFG, $USER, $SESSION;

        if (empty($CFG->themeorder)) {
            $themeorder = array('course', 'category', 'session', 'user', 'cohort', 'site');
        } else {
            $themeorder = $CFG->themeorder;
            // Just in case, make sure we always use the site theme if nothing else matched.
            $themeorder[] = 'site';
        }

        $mnetpeertheme = '';
        if (isloggedin() and isset($CFG->mnet_localhost_id) and $USER->mnethostid != $CFG->mnet_localhost_id) {
            require_once($CFG->dirroot.'/mnet/peer.php');
            $mnetpeer = new mnet_peer();
            $mnetpeer->set_id($USER->mnethostid);
            if ($mnetpeer->force_theme == 1 && $mnetpeer->theme != '') {
                $mnetpeertheme = $mnetpeer->theme;
            }
        }

        $devicetheme = core_useragent::get_device_type_theme($this->devicetypeinuse);

        // The user is using another device than default, and we have a theme for that, we should use it.
        $hascustomdevicetheme = core_useragent::DEVICETYPE_DEFAULT != $this->devicetypeinuse && !empty($devicetheme);

        foreach ($themeorder as $themetype) {

            switch ($themetype) {
                case 'course':
                    if (!empty($CFG->allowcoursethemes) && !empty($this->_course->theme) && !$hascustomdevicetheme) {
                        return $this->_course->theme;
                    }
                break;

                case 'category':
                    if (!empty($CFG->allowcategorythemes) && !$hascustomdevicetheme) {
                        $categories = $this->categories;
                        foreach ($categories as $category) {
                            if (!empty($category->theme)) {
                                return $category->theme;
                            }
                        }
                    }
                break;

                case 'session':
                    if (!empty($SESSION->theme)) {
                        return $SESSION->theme;
                    }
                break;

                case 'user':
                    if (!empty($CFG->allowuserthemes) && !empty($USER->theme) && !$hascustomdevicetheme) {
                        if ($mnetpeertheme) {
                            return $mnetpeertheme;
                        } else {
                            return $USER->theme;
                        }
                    }
                break;

                case 'cohort':
                    if (!empty($CFG->allowcohortthemes) && !empty($USER->cohorttheme) && !$hascustomdevicetheme) {
                        return $USER->cohorttheme;
                    }
                break;

                case 'site':
                    if ($mnetpeertheme) {
                        return $mnetpeertheme;
                    }
                    // First try for the device the user is using.
                    if (!empty($devicetheme)) {
                        return $devicetheme;
                    }
                    // Next try for the default device (as a fallback).
                    $devicetheme = core_useragent::get_device_type_theme(core_useragent::DEVICETYPE_DEFAULT);
                    if (!empty($devicetheme)) {
                        return $devicetheme;
                    }
                    // The default device theme isn't set up - use the overall default theme.
                    return theme_config::DEFAULT_THEME;
            }
        }

        // We should most certainly have resolved a theme by now. Something has gone wrong.
        debugging('Error resolving the theme to use for this page.', DEBUG_DEVELOPER);
        return theme_config::DEFAULT_THEME;
    }
protected function resolve_theme() {
        global $CFG, $USER, $SESSION;

        if (empty($CFG->themeorder)) {
            $themeorder = array('course', 'category', 'session', 'user', 'cohort', 'site');
        } else {
            $themeorder = $CFG->themeorder;
            // Just in case, make sure we always use the site theme if nothing else matched.
            $themeorder[] = 'site';
        }

        $mnetpeertheme = '';
        if (isloggedin() and isset($CFG->mnet_localhost_id) and $USER->mnethostid != $CFG->mnet_localhost_id) {
            require_once($CFG->dirroot.'/mnet/peer.php');
            $mnetpeer = new mnet_peer();
            $mnetpeer->set_id($USER->mnethostid);
            if ($mnetpeer->force_theme == 1 && $mnetpeer->theme != '') {
                $mnetpeertheme = $mnetpeer->theme;
            }
        }

        $devicetheme = core_useragent::get_device_type_theme($this->devicetypeinuse);

        // The user is using another device than default, and we have a theme for that, we should use it.
        $hascustomdevicetheme = core_useragent::DEVICETYPE_DEFAULT != $this->devicetypeinuse && !empty($devicetheme);

        foreach ($themeorder as $themetype) {

            switch ($themetype) {
                case 'course':
                    if (!empty($CFG->allowcoursethemes) && !empty($this->_course->theme) && !$hascustomdevicetheme) {
                        return $this->_course->theme;
                    }
                break;

                case 'category':
                    if (!empty($CFG->allowcategorythemes) && !$hascustomdevicetheme) {
                        $categories = $this->categories;
                        foreach ($categories as $category) {
                            if (!empty($category->theme)) {
                                return $category->theme;
                            }
                        }
                    }
                break;

                case 'session':
                    if (!empty($SESSION->theme)) {
                        return $SESSION->theme;
                    }
                break;

                case 'user':
                    if (!empty($CFG->allowuserthemes) && !empty($USER->theme) && !$hascustomdevicetheme) {
                        if ($mnetpeertheme) {
                            return $mnetpeertheme;
                        } else {
                            return $USER->theme;
                        }
                    }
                break;

                case 'cohort':
                    if (!empty($CFG->allowcohortthemes) && !empty($USER->cohorttheme) && !$hascustomdevicetheme) {
                        return $USER->cohorttheme;
                    }
                break;

                case 'site':
                    if ($mnetpeertheme) {
                        return $mnetpeertheme;
                    }
                    // First try for the device the user is using.
                    if (!empty($devicetheme)) {
                        return $devicetheme;
                    }
                    // Next try for the default device (as a fallback).
                    $devicetheme = core_useragent::get_device_type_theme(core_useragent::DEVICETYPE_DEFAULT);
                    if (!empty($devicetheme)) {
                        return $devicetheme;
                    }
                    // The default device theme isn't set up - use the overall default theme.
                    return theme_config::DEFAULT_THEME;
            }
        }

        // We should most certainly have resolved a theme by now. Something has gone wrong.
        debugging('Error resolving the theme to use for this page.', DEBUG_DEVELOPER);
        return theme_config::DEFAULT_THEME;
    }
protected function resolve_theme ( ) { global $ CFG , $ USER , $ SESSION ; if ( empty ( $ CFG -> themeorder ) ) { $ themeorder = array ( 'course' , 'category' , 'session' , 'user' , 'cohort' , 'site' ) ; } else { $ themeorder = $ CFG -> themeorder ; // Just in case, make sure we always use the site theme if nothing else matched. $ themeorder [ ] = 'site' ; } $ mnetpeertheme = '' ; if ( isloggedin ( ) and isset ( $ CFG -> mnet_localhost_id ) and $ USER -> mnethostid != $ CFG -> mnet_localhost_id ) { require_once ( $ CFG -> dirroot . '/mnet/peer.php' ) ; $ mnetpeer = new mnet_peer ( ) ; $ mnetpeer -> set_id ( $ USER -> mnethostid ) ; if ( $ mnetpeer -> force_theme == 1 && $ mnetpeer -> theme != '' ) { $ mnetpeertheme = $ mnetpeer -> theme ; } } $ devicetheme = core_useragent :: get_device_type_theme ( $ this -> devicetypeinuse ) ; // The user is using another device than default, and we have a theme for that, we should use it. $ hascustomdevicetheme = core_useragent :: DEVICETYPE_DEFAULT != $ this -> devicetypeinuse && ! empty ( $ devicetheme ) ; foreach ( $ themeorder as $ themetype ) { switch ( $ themetype ) { case 'course' : if ( ! empty ( $ CFG -> allowcoursethemes ) && ! empty ( $ this -> _course -> theme ) && ! $ hascustomdevicetheme ) { return $ this -> _course -> theme ; } break ; case 'category' : if ( ! empty ( $ CFG -> allowcategorythemes ) && ! $ hascustomdevicetheme ) { $ categories = $ this -> categories ; foreach ( $ categories as $ category ) { if ( ! empty ( $ category -> theme ) ) { return $ category -> theme ; } } } break ; case 'session' : if ( ! empty ( $ SESSION -> theme ) ) { return $ SESSION -> theme ; } break ; case 'user' : if ( ! empty ( $ CFG -> allowuserthemes ) && ! empty ( $ USER -> theme ) && ! $ hascustomdevicetheme ) { if ( $ mnetpeertheme ) { return $ mnetpeertheme ; } else { return $ USER -> theme ; } } break ; case 'cohort' : if ( ! empty ( $ CFG -> allowcohortthemes ) && ! empty ( $ USER -> cohorttheme ) && ! $ hascustomdevicetheme ) { return $ USER -> cohorttheme ; } break ; case 'site' : if ( $ mnetpeertheme ) { return $ mnetpeertheme ; } // First try for the device the user is using. if ( ! empty ( $ devicetheme ) ) { return $ devicetheme ; } // Next try for the default device (as a fallback). $ devicetheme = core_useragent :: get_device_type_theme ( core_useragent :: DEVICETYPE_DEFAULT ) ; if ( ! empty ( $ devicetheme ) ) { return $ devicetheme ; } // The default device theme isn't set up - use the overall default theme. return theme_config :: DEFAULT_THEME ; } } // We should most certainly have resolved a theme by now. Something has gone wrong. debugging ( 'Error resolving the theme to use for this page.' , DEBUG_DEVELOPER ) ; return theme_config :: DEFAULT_THEME ; }
Work out the theme this page should use.

This depends on numerous $CFG settings, and the properties of this page.

@return string the name of the theme that should be used on this page.
Work out the theme this page should use .