SettingsController::themes PHP Method

    public function themes($ThemeName = '', $TransientKey = '')
    {
        $this->addJsFile('addons.js');
        $this->setData('Title', t('Themes'));
        $this->permission('Garden.Settings.Manage');
        $this->setHighlightRoute('dashboard/settings/themes');
        $ThemeInfo = Gdn::themeManager()->enabledThemeInfo(true);
        $currentTheme = $this->themeInfoToMediaItem(val('Index', $ThemeInfo), true);
        $this->setData('CurrentTheme', $currentTheme);
        $Themes = Gdn::themeManager()->availableThemes();
        uasort($Themes, array('SettingsController', '_NameSort'));
        // Remove themes that are archived
        $Remove = array();
        foreach ($Themes as $Index => $Theme) {
            $Archived = val('Archived', $Theme);
            if ($Archived) {
                $Remove[] = $Index;
            }
            // Remove mobile themes, as they have own page.
            if (isset($Theme['IsMobile']) && $Theme['IsMobile']) {
                unset($Themes[$Index]);
            }
        }
        foreach ($Remove as $Index) {
            unset($Themes[$Index]);
        }
        $this->setData('AvailableThemes', $Themes);
        if ($ThemeName != '' && Gdn::session()->validateTransientKey($TransientKey)) {
            try {
                $ThemeInfo = Gdn::themeManager()->getThemeInfo($ThemeName);
                if ($ThemeInfo === false) {
                    throw new Exception(sprintf(t("Could not find a theme identified by '%s'"), $ThemeName));
                }
                Gdn::session()->setPreference(array('PreviewThemeName' => '', 'PreviewThemeFolder' => ''));
                // Clear out the preview
                Gdn::themeManager()->enableTheme($ThemeName);
                $this->EventArguments['ThemeName'] = $ThemeName;
                $this->EventArguments['ThemeInfo'] = $ThemeInfo;
                $this->fireEvent('AfterEnableTheme');
            } catch (Exception $Ex) {
                $this->Form->addError($Ex);
            }
            if ($this->Form->errorCount() == 0) {
                redirect('/settings/themes');
            }
        }
        $this->render();
    }