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<?php

require_once __DIR__."/../utils/Singleton.php";

use swag\Singleton;

/**
 * Controller for showing the settings page.
 */
class SettingsPageController extends Singleton {

    public function init() {
        add_action("wp_ajax_install_swagtoc",array($this,"installSwagToc"));
    }

    /**
     * Install table of contents.
     */
    public function installSwagToc() {
        global $wpdb;

        $q=$wpdb->prepare(
            "SELECT ID ".
            "FROM   {$wpdb->prefix}posts ".
            "WHERE  post_type=%s ".
            "AND    post_name=%s ",
            "swag","toc");
        $id=$wpdb->get_var($q);

        if ($wpdb->last_error)
            throw new Exception($wpdb->last_error);

        if (!$id)
            throw new Exception("No swag toc front page available");

        update_option("show_on_front","page");
        update_option("page_on_front",$id);
        wp_redirect(admin_url('options-reading.php'));
    }

    /**
     * Render the xapi page.
     */
    private function xapi() {
        $t=new Template(__DIR__."/../../tpl/settings_xapi.php");

        if (is_plugin_active("wp-xapi-lrs/wp-xapi-lrs.php"))
            $t->set("usingInternalLrs",TRUE);

        else
            $t->set("usingInternalLrs",FALSE);

        return $t->render();
    }

    /**
     * Render the about page.
     */
    private function about() {
        $t=new Template(__DIR__."/../../tpl/settings_about.php");
        return $t->render();
    }

    /**
     * Process request.
     */
    public function process() {
        $template=new Template(__DIR__."/../../tpl/settings.php");
        $template->set("adminUrl",admin_url("options-general.php")."?page=ti_settings");

        $tab="about";
        if (isset($_REQUEST["tab"]))
            $tab=$_REQUEST["tab"];

        $template->set("tab",$tab);
        $template->set("tabs",array(
            "about"=>"About",
            "xapi"=>"xAPI Settings",
        ));

        switch ($tab) {
            case "about":
                $template->set("content",$this->about());
                break;

            case "xapi":
                $template->set("content",$this->xapi());
                break;

            default:
                $template->set("content","No such tab");
                break;
        }

        $template->show();
    }
}