Copy <?php
/**
* Get_Posts class.
*
* @package headless-cms
*/
namespace Headless_CMS\Features\Inc\Api;
use Headless_CMS\Features\Inc\Traits\Singleton;
use WP_Error;
use WP_REST_Request;
use WP_REST_Response;
use WP_Query;
/**
* Class Get_Posts
*/
class Get_Posts {
use Singleton;
/**
* Construct method.
*/
protected function __construct() {
$this->setup_hooks();
}
/**
* To setup action/filter.
*
* @return void
*/
protected function setup_hooks() {
$this->post_type = 'post';
$this->route = '/posts';
$this->post_per_page = 9;
add_action( 'rest_api_init', [ $this, 'rest_posts_endpoints' ] );
}
/**
* Register posts endpoints.
*/
public function rest_posts_endpoints() {
/**
* Handle Posts Request: GET Request
*
* This endpoint takes 'page_no' in query params of the request.
* Returns the posts data object on success
* Also handles error by returning the relevant error.
*
* Example: http://example.com/wp-json/rae/v1/posts?page_no=1
*/
register_rest_route(
'rae/v1',
$this->route,
[
'method' => 'GET',
'callback' => [ $this, 'rest_endpoint_handler' ],
'permission_callback' => '__return_true',
]
);
}
/**
* Get posts call back.
*
* Returns the posts data object on success
*
* @param WP_REST_Request $request request object.
*
* @return WP_Error|WP_REST_Response response object.
*/
public function rest_endpoint_handler( WP_REST_Request $request ) {
$response = [];
$parameters = $request->get_params();
$posts_page_no = ! empty( $parameters['page_no'] ) ? intval( sanitize_text_field( $parameters['page_no'] ) ) : '';
// Error Handling.
$error = new WP_Error();
$posts_data = $this->get_posts( $posts_page_no );
// If posts found.
if ( ! empty( $posts_data['posts_data'] ) ) {
$response['status'] = 200;
$response['posts_data'] = $posts_data['posts_data'];
$response['found_posts'] = $posts_data['found_posts'];
$response['page_count'] = $posts_data['page_count'];
} else {
// If the posts not found.
$error->add( 406, __( 'Posts not found', 'rest-api-endpoints' ) );
return $error;
}
return new WP_REST_Response( $response );
}
/**
* Calculate page count.
*
* @param int $total_found_posts Total posts found.
* @param int $post_per_page Post per page count.
*
* @return int
*/
public function calculate_page_count( $total_found_posts, $post_per_page ) {
return ( (int) ( $total_found_posts / $post_per_page ) + ( ( $total_found_posts % $post_per_page ) ? 1 : 0 ) );
}
/**
* Get posts data.
*
* @param integer $page_no page no.
*
* @return array Posts.
*/
public function get_posts( $page_no = 1 ) {
$args = [
'post_type' => $this->post_type,
'post_status' => 'publish',
'posts_per_page' => $this->post_per_page,
'fields' => 'ids',
'orderby' => 'date',
'paged' => $page_no,
'update_post_meta_cache' => false,
'update_post_term_cache' => false,
];
$latest_post_ids = new WP_Query( $args );
$post_result = $this->get_required_posts_data( $latest_post_ids->posts );
$found_posts = $latest_post_ids->found_posts;
$page_count = $this->calculate_page_count( $found_posts, $this->post_per_page );
return [
'posts_data' => $post_result,
'found_posts' => $found_posts,
'page_count' => $page_count,
];
}
/**
* Construct a post array that contains, title, excerpt and featured image.
*
* @param {array} $post_ids post ids.
*
* @return array
*/
public function get_required_posts_data( $post_ids ) {
$post_result = [];
if ( empty( $post_ids ) && ! is_array( $post_ids ) ) {
return $post_result;
}
foreach ( $post_ids as $post_ID ) {
$author_id = get_post_field( 'post_author', $post_ID );
$attachment_id = get_post_thumbnail_id( $post_ID );
$post_data = [];
$post_data['id'] = $post_ID;
$post_data['title'] = get_the_title( $post_ID );
$post_data['slug'] = get_post($post_ID)->post_name;
$post_data['excerpt'] = get_the_excerpt( $post_ID );
$post_data['date'] = get_the_date( '', $post_ID );
$post_data['attachment_image'] = [
'img_sizes' => wp_get_attachment_image_sizes( $attachment_id ),
'img_src' => wp_get_attachment_image_src( $attachment_id, 'full' ),
'img_srcset' => wp_get_attachment_image_srcset( $attachment_id ),
];
$post_data['categories'] = get_the_category( $post_ID );
$post_data['meta'] = [
'author_id' => $author_id,
'author_name' => get_the_author_meta( 'display_name', $author_id ),
];
array_push( $post_result, $post_data );
}
return $post_result;
}
}
