wp_list table get record from database and add view,delete,read and unread items via bulk action

					<?php
    // Custom WP_List_Table class
    require_once(ABSPATH . 'wp-admin/includes/class-wp-list-table.php');

    // Define your own custom list table class
    class Custom_List_Table extends WP_List_Table {
        // Database table name
        private $table_name;

        public function __construct($table_name) {
            $this->table_name = $table_name;
            parent::__construct(array(
                'singular' => 'item',
                'plural'   => 'items',
                'ajax'     => false
            ));
        }

        // Helper method to get records from the database
        private function get_records() {
            global $wpdb;
            $query = "SELECT * FROM {$this->table_name}";
            return $wpdb->get_results($query, ARRAY_A);
        }

        // Bulk action handler for adding view, delete, read, and unread items
        public function process_bulk_action() {
            // Check if the user performed a bulk action
            if ('bulk-action' === $this->current_action()) {
                $ids = isset($_REQUEST['item']) ? $_REQUEST['item'] : array();

                if (!empty($ids)) {
                    foreach ($ids as $id) {
                        // Perform actions based on action value
                        switch ($_REQUEST['action']) {
                            case 'view':
                                // Add view code here
                                $this->view_item($id);
                                break;
                            case 'delete':
                                // Add delete code here
                                break;
                            case 'read':
                                // Add read code here
                                break;
                            case 'unread':
                                // Add unread code here
                                break;
                        }
                    }
                }
            }
        }

        // View item action handler
        private function view_item($id) {
            // Retrieve desired item details based on $id
            $item = $this->get_item_details($id);
            
            // Perform view action using item details
            if ($item) {
                // Add your view code here
                // Example: Display the item details
                echo "<h2>Item Details:</h2>";
                echo "ID: " . $item['item_id'] . "<br>";
                echo "Name: " . $item['item_name'] . "<br>";
            }
        }

        // Helper method to get item details based on ID
        private function get_item_details($id) {
            global $wpdb;
            $query = $wpdb->prepare("SELECT * FROM {$this->table_name} WHERE item_id = %d", $id);
            return $wpdb->get_row($query, ARRAY_A);
        }

        // Prepare items for display
        public function prepare_items() {
            $this->process_bulk_action();

            $columns  = $this->get_columns();
            $hidden   = array();
            $sortable = $this->get_sortable_columns();

            $this->_column_headers = array($columns, $hidden, $sortable);
            $this->items = $this->get_records();
        }


        // ... rest of the code remains the same ...

    }

    // Example usage
    function display_list_table() {
        $table_name = 'your_table_name'; // Replace with your actual table name
        $list_table = new Custom_List_Table($table_name);
        $list_table->prepare_items();

        echo '<form method="get">';
        $list_table->search_box('Search', 'search');
        $list_table->display();
        echo '</form>';
    }

    // Call the display_list_table function to display the table
    display_list_table();
?>