Timber theme functions.php boilerplate file

functions.php

<?php
/**
 * This theme using Timber as html-template engine
 * See more https://github.com/jarednova/timber
 *
 */

if (!class_exists('Timber')){
    add_action( 'admin_notices', function(){
        echo '<div class="error"><p>Timber not activated. Make sure you activate the plugin in <a href="' . admin_url('plugins.php#timber') . '">' . admin_url('plugins.php') . '</a></p></div>';
    });
    return;
}
foreach (glob(__DIR__ . '/inc/*.php') as $file) {
    require_once($file);
}

class InsureTheme extends TimberSite {
    public function __construct(){
        add_theme_support('post-thumbnails');
        add_theme_support('menus');
        add_filter('timber_context', array($this, 'add_to_context'));
        add_filter('get_twig', array($this, 'add_to_twig'));
        add_action('init', array($this, 'register_post_types'));
        add_action('init', array($this, 'register_ui_columns'));
        add_action('init', array($this, 'register_ajax'));
        add_action('init', array($this, 'register_theme_settings'));
        parent::__construct();
    }

    /**
     * Post-types registering
     */
    public function register_post_types(){
        //Register post types here
    }

    /**
     * Register custom columns in UI
     */
    public function register_ui_columns(){
        //post type columns here
    }

    /**
     * Register setting that could be used by theme
     */
    public function register_theme_settings() {
       //register theme settings here
    }

    /**
     * Hooks for ajax handling
     */
    public  function register_ajax(){
        //register ajax callback here
    }

    /**
     * Register variables for using in twig template file
     */
    public function add_to_context($context){
        $context['site']        = $this;
        $context['ajax_url']    = admin_url('admin-ajax.php');
        return $context;
    }

    /**
     * Register filters and extensions for using
     * in twig template file
     * @param $twig
     * @return mixed
     */
    public function add_to_twig($twig){
        /* this is where you can add your own functions to twig */
        $twig->addExtension(new Twig_Extension_StringLoader());
        return $twig;
    }

}

new InsureTheme();