WordPress: Add new post status to custom post types and quick edit menu

wp-custom-post-status.php

<?php

// Based on:
// https://www.wpbeginner.com/wp-tutorials/how-to-add-custom-post-status-for-blog-posts-in-wordpress/
// https://rudrastyh.com/wordpress/custom-post-status-quick-edit.html
class BP_Custom_Post_Status {
	
	public $post_types = array( 'videographer', 'photographer' );
	
	public function __construct() {
		add_action( 'init', array($this, 'register_post_status'), 8 );
		add_action( 'admin_print_footer_scripts', array($this, 'append_post_status_list'), 8 );
		add_filter( 'display_post_states', array($this, 'display_status_label') );
	}
	
	// Registering custom post status
	// Max length of post status is 20 characters
	public function register_post_status() {
		register_post_status( 'expired', array(
			'label'                     => _x( 'Expired', 'post' ),
			'public'                    => true,
			'exclude_from_search'       => true,
			'show_in_admin_all_list'    => true,
			'show_in_admin_status_list' => true,
			'label_count'               => _n_noop( 'Expired <span class="count">(%s)</span>', 'Expired <span class="count">(%s)</span>' ),
		) );
	}
	
	// Using jQuery to add it to post status dropdown
	public function append_post_status_list() {
		// Must be a valid WP_Post object
		global $post;
		if ( !isset($post) ) return;
		if ( !($post instanceof WP_Post) ) return;
		if ( !in_array($post->post_type, $this->post_types) ) return;
		
		$is_selected = $post->post_status == 'expired';
		
		?>
<script type="text/javascript">
// Single post edit screen, add dropdowns and text to publihs box:
jQuery(function() {
	var expired_selected = <?php echo $is_selected ? 1 : 0; ?>;
	
	var $post_status = jQuery("#post_status");
	var $post_status_display = jQuery("#post-status-display");

	$post_status.append('<option value="expired">Expired</option>');
	
	if ( expired_selected ) {
		$post_status.val( 'expired' );
		$post_status_display.text('Expired');
	}
});

// Post listing screen: Add quick edit functionality:
jQuery(function() {
	// See: /wp-admin/js/inline-edit-post.js -> Window.inlineEditPost.edit
	var insert_expired_status_to_inline_edit = function(t, post_id, $row) {
		// t = window.inlineEditPost
		// post_id = post_id of the post (eg: div#inline_31042 -> 31042)
		// $row = The original post row <tr> which contains the quick edit button, post title, columns, etc.
		var $editRow = jQuery('#edit-' + post_id); // The quick edit row that appeared.
		var $rowData = jQuery('#inline_' + post_id); // A hidden row that contains relevant post data
		
		var status = jQuery('._status', $rowData).text(); // Current post status
		
		var $status_select = $editRow.find('select[name="_status"]'); // Dropdown to change status
		
		// Add expired status to dropdown, if not present
		if ( $status_select.find('option[value="expired"]').length < 1 ) {
			$status_select.append('<option value="expired">Expired</option>');
		}
		
		// Select expired from dropdown if that is the current post status
		if ( status === 'expired' ) $status_select.val( 'expired' );
		
		// View information:
		// console.log( id, $row, $editRow, $rowData, status, $status_select );
	};
	
	// On click, wait for default functionality, then apply our customizations
	var inline_edit_post_status = function() {
		var t = window.inlineEditPost;
		var $row = jQuery(this).closest('tr');
		var id = t.getId(this);
		
		// Use next frame if browser supports it, or wait 0.25 seconds
		if ( typeof requestAnimationFrame === 'function' ) {
			requestAnimationFrame(function() { return insert_expired_status_to_inline_edit( t, post_id, $row ); });
		}else{
			setTimeout(function() { return insert_expired_status_to_inline_edit( t, post_id, $row ); }, 250 );
		}
	};
	
	// Bind click event before inline-edit-post.js has a chance to bind it
	jQuery('#the-list').on('click', '.editinline', inline_edit_post_status);
});
</script>
		<?php
	}
	
	// Display "— Expired" after post name on the dashobard, like you would see "— Draft" for draft posts.
	// Not shown when viewing only expired posts because that would be redundant.
	function display_status_label( $statuses ) {
		global $post; // we need it to check current post status
		
		if( get_query_var( 'post_status' ) != 'expired' ){ // not for pages with all posts of this status
			if( $post->post_status == 'expired' ){ // если статус поста - Архив
				return array('Expired'); // returning our status label
			}
		}
		
		return $statuses; // returning the array with default statuses
	}
	
}
new BP_Custom_Post_Status();