hantico/wp-content/themes/hantico/inc/ajax.php

<?php

// AJAX-фильтр статей
function theme_filter_articles() {
	check_ajax_referer('theme_articles_nonce', 'nonce');
	$category = isset($_POST['category']) ? sanitize_title($_POST['category']) : '';
	$page = isset($_POST['page']) ? max(1, absint($_POST['page'])) : 1;
	$args = [
		'post_type'      => 'article',
		'posts_per_page' => 12,
		'paged'          => $page,
		'orderby'        => 'date',
		'order'          => 'DESC',
	];
	$section = isset($_POST['section']) && is_string($_POST['section']) ? sanitize_key(wp_unslash($_POST['section'])) : '';
	if ($section !== '' && !in_array($section, ['general', 'taxi', 'courier', 'cargo'], true)) {
		wp_send_json_error(['message' => 'Неизвестный раздел'], 400);
	}
	$args['tax_query'] = hantico_blog_tax_query($section, $category);
	$query = new WP_Query($args);
	ob_start();
	if ($query->have_posts()) {
		while ($query->have_posts()) {
			$query->the_post();
			get_template_part('template-parts/articles-item');
		}
		wp_reset_postdata();
	}
	if (!$query->have_posts()) echo '<p>Статьи не найдены.</p>';
	$html = ob_get_clean();
	wp_send_json_success([
		'html'      => $html,
		'page'      => $page,
		'max_pages' => $query->max_num_pages,
		'category'  => $category
	]);
}
add_action('wp_ajax_theme_filter_articles', 'theme_filter_articles');
add_action('wp_ajax_nopriv_theme_filter_articles', 'theme_filter_articles');


// AJAX-фильтр вакансий
function theme_filter_vacancies() {
	check_ajax_referer('theme_vacancies_nonce', 'nonce');
	$category = isset($_POST['category']) ? sanitize_title($_POST['category']) : '';
	$page = isset($_POST['page']) ? max(1, absint($_POST['page'])) : 1;
	$args = [
		'post_type'      => 'vacancy',
		'posts_per_page' => 12,
		'paged'          => $page,
		'orderby'        => 'date',
		'order'          => 'DESC',
	];
	if (!empty($category)) {
		$args['tax_query'] = [
			[
				'taxonomy' => 'vacancy_category',
				'field'    => 'slug',
				'terms'    => $category,
			],
		];
	}
	$query = new WP_Query($args);
	ob_start();
	if ($query->have_posts()) {
		while ($query->have_posts()) {
			$query->the_post();
			get_template_part('template-parts/vacancies-item');
		}
		wp_reset_postdata();
	}
	$html = ob_get_clean();
	wp_send_json_success(
		[
			'html'      => $html,
			'page'      => $page,
			'count'     => $query->found_posts,
			'max_pages' => $query->max_num_pages,
			'category'  => $category
		]
	);
}
add_action('wp_ajax_theme_filter_vacancies', 'theme_filter_vacancies');
add_action('wp_ajax_nopriv_theme_filter_vacancies', 'theme_filter_vacancies');


// AJAX-загрузка постов
function theme_load_more() {
	$allowed_types = [
		'news'   => 'template-parts/news-item',
		'review' => 'template-parts/reviews-item',
	];
	$type = isset($_POST['type']) ? sanitize_key($_POST['type']) : '';
	if (!array_key_exists($type, $allowed_types)) {
		wp_send_json_error(['message' => 'Invalid type'], 400);
	}
	check_ajax_referer("theme_{$type}_nonce", 'nonce');
	$page = isset($_POST['page']) ? max(1, absint($_POST['page'])) : 1;
	$query = new WP_Query([
		'post_type'      => $type,
		'posts_per_page' => 12,
		'paged'          => $page,
		'orderby'        => 'date',
		'order'          => 'DESC',
	]);
	ob_start();
	if ($query->have_posts()) {
		while ($query->have_posts()) {
			$query->the_post();
			get_template_part($allowed_types[$type]);
		}
		wp_reset_postdata();
	}
	$html = ob_get_clean();
	wp_send_json_success([
		'html'      => $html,
		'page'      => $page,
		'max_pages' => $query->max_num_pages,
	]);
}
add_action('wp_ajax_theme_load_more', 'theme_load_more');
add_action('wp_ajax_nopriv_theme_load_more', 'theme_load_more');