archive.php

<?php
/**
 * The template for displaying Archive pages.
 *
 * Used to display archive-type pages if nothing more specific matches a query.
 * For example, puts together date-based pages if no date.php file exists.
 *
 * Learn more: http://codex.wordpress.org/Template_Hierarchy
 *
 * Methods for TimberHelper can be found in the /lib sub-directory
 *
 * @package  WordPress
 * @subpackage  Timber
 * @since   Timber 0.2
 */

use Timber\Timber;
use Lumberjack\PostTypes\Post;

$templates = ['posts.twig', 'generic-page.twig'];

$data = Timber::get_context();

$data['title'] = 'Archive';

if (is_day()) {
    $data['title'] = 'Archive: '.get_the_date('D M Y');
} elseif (is_month()) {
    $data['title'] = 'Archive: '.get_the_date('M Y');
} elseif (is_year()) {
    $data['title'] = 'Archive: '.get_the_date('Y');
} elseif (is_tag()) {
    $data['title'] = single_tag_title('', false);
} elseif (is_category()) {
    $data['title'] = single_cat_title('', false);
    array_unshift($templates, 'archive-'.get_query_var('cat').'.twig');
} elseif (is_post_type_archive()) {
    $data['title'] = post_type_archive_title('', false);
    array_unshift($templates, 'archive-'.get_post_type().'.twig');
}

// TODO: Currently only works for posts, fix for custom post types
$data['posts'] = Post::query();

Timber::render($templates, $data);