Make Bulk taks tool in WordPress admin

class-wp-bulk-task.php

<?php
/*
USAGE:
$task = new WP_Bulk_Task('test-bulk-task', 'product');
$task->set_callback(function($post){
error_log($post->ID);
});
$task->set_posts_per_page(1);
$task->register();
 */

class WP_Bulk_Task {
    public $posts_per_page;
    public function __construct($slug, $post_type, $title=null) {
        $this->slug           = $slug;
        $this->title          = ($title!==null) ? $title : $slug;
        $this->post_type      = $post_type;
        $this->posts_per_page = 10;
        $this->capabilities   = 'install_plugins';
        $this->position       = 10;
		$this->nonce          = 'wp-bulk-task';
		$this->btn_label	  = "Run bulk task";
		$this->need_confirmation = true;
		$this->confirmation_message =  "Are you sure ?";
    }
    public function set_posts_per_page($posts_per_page) {
        $this->posts_per_page = $posts_per_page;
    }
    public function register() {
        add_action('admin_init', [$this, 'set_nonce']);
        add_action('admin_menu', array($this, 'admin_menu'));
        add_action('wp_ajax_' . $this->slug, [$this, 'ajax_action']); // executed when logged in
        add_action('wp_ajax_nopriv_' . $this->slug, [$this, 'ajax_action_nopriv']); // executed when logged out
	}
	public function set_btn_label($label){
		$this->btn_label = $label;
	}
	public function set_confirmation($is_needed, $message=null){
		if($message!==null){
			$this->confirmation_message = $message;
		}
		$this->need_confirmation = $is_needed;
	}
    public function set_nonce() {
        $this->nonce = wp_create_nonce($this->slug);
    }
    public function ajax_action_nopriv() {
        return wp_send_json_error(['message' => 'must be logged']);
    }

    public function loop_args() {
        $paged = ($_POST['paged']) ? $_POST['paged'] : 1;
        $args =  [
            'post_type'      => $this->post_type,
            'posts_per_page' => $this->posts_per_page,
            'paged'          => $paged,
		];
		$args = apply_filters('wpbt_loops_args', $args);
		return apply_filters('wpbt_loops_args_'.$this->slug, $args);
    }
    public function ajax_action() {
		$this->validate_ajax_action();
        $paged = ($_POST['paged']) ? $_POST['paged'] : 1;
        $query = new WP_Query($this->loop_args());

        $max_num_pages = $query->max_num_pages;
        $logs          = [];
        if ($query->have_posts()) {
            while ($query->have_posts()) {
                $query->the_post();
                global $post;
                $new_logs = call_user_func($this->callback, $post);
                if (is_array($new_logs)) {
                    $logs = array_merge($logs, $new_logs);
                } elseif ($new_logs) {
                    $logs = array_merge($logs, [$new_logs]);
                }

            }
        }
        wp_send_json_success([
            'max_num_pages' => $max_num_pages,
            'paged'         => (int)$paged,
            'logs'          => $logs,
        ]);

    }
    public function set_callback($callback) {
        $this->callback = $callback;
    }
    public function admin_menu() {

        $hook = add_management_page(
            $this->title,
            $this->title,
            $this->capabilities,
            $this->slug,
            [$this, 'admin_page_content'],
            $this->position
        );
        add_action("load-$hook", array($this, 'admin_page_load'));
    }

    public function admin_page_load() {
        // ...
    }

    public function admin_page_content() {
        $this->admin_page_style();
		$this->admin_page_script();
        ?>
        <div class="wrap">
			<h1><?php echo $this->title ?></h1>
			<div style="margin-bottom: 20px;"><?php do_action('wpbt_before_content', $this->slug); ?></div>
            <button id="wpbt-runner" class="button"><?php echo $this->btn_label; ?></button>
			<div><?php do_action('wpbt_after_button', $this->slug); ?></div>
            <div class="wpbt-progress__percent">0%</div>
            <div class="wpbt-progress">
				<div class="wpbt-progress__bar" style="width: 0%;"></div>
			</div>
			<div class="wpbt-logs"></div>
			<?php do_action('wpbt_after_content', $this->slug); ?>
        </div>
        <?php
	}
    public function admin_page_script() {
        ?>
        <script>
        jQuery(document).ready(function($){
			var wpbtCount = 0;
            function setPercentage(current, max){
                var percent = Math.round(current / max * 100);
                $('.wpbt-progress__percent').html(percent+'%');
                $('.wpbt-progress__bar').css( "width",percent+ "%" );
			}
			function putLogs(logs, currentPage){
				for(var i = 0; i < logs.length; i++ ){
					wpbtCount++;
					$('.wpbt-logs').prepend('<div><strong>'+wpbtCount+'</strong> | '+logs[i]+'</div>');
				}
			}
            function doBulkTask(paged) {
                var data = {
                    action: "<?php echo $this->slug; ?>",
                    nonce: "<?php echo $this->nonce; ?>",
                    paged: paged
                };
                $.ajax({
                    type: "post",
                    url: "<?php echo admin_url('admin-ajax.php') ?>",
                    data: data,
                    error: (response, error) => {
                        console.error("response", response);
                        console.error("error", error);
                    },
                    success: response => {
                        var max_num_pages = response.data.max_num_pages;
                        var currentPage = response.data.paged;
                        if (max_num_pages > currentPage) {
                            setPercentage(currentPage, max_num_pages);
                            currentPage++;
                            doBulkTask(currentPage)
                        } else {
                            setPercentage(currentPage, max_num_pages);
						}
						putLogs(response.data.logs, currentPage);
                    }
                });
            }
            $('#wpbt-runner').on('click', function(){
				<?php if($this->need_confirmation): ?>
				var confrimation = confirm("<?php echo $this->confirmation_message; ?>");
				if(!confrimation){
					return false;
				}
				<?php endif; ?>
                $(this).prop('disabled', true);
                doBulkTask(1)
            });
        });
        </script>
        <?php
	}
    public function admin_page_style() {
        ?>
			<style>
				.wpbt-progress{
					margin-top: 20px;
					width: 100%;
					height: 40px;
					border-radius: 10px;
					background: white;
					border: 1px solid -internal-root-color;
					display: flex;
					overflow: hidden;
				}
				.wpbt-progress__bar{
					background-color: blue;
				}
				.wpbt-progress__percent{
					text-align: center;
				}
				.wpbt-logs{
					background: white;
					max-height: 400px;
					overflow-y: auto;
				}
				.wpbt-logs > div{
					padding: 5px;
				}
			</style>
			<?php
	}
	private function validate_ajax_action(){
        if ( !wp_verify_nonce($_POST['nonce'], $this->slug)) {
            wp_send_json_error(['message' => 'Invalid Ajax Action']);
            die();
        }
        if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
            return true;
        } else {
            wp_send_json_error(['message' => 'Invalid Ajax Action']);
            die();
        }
    }
}