<?php
namespace bluesquirrel;
defined('ABSPATH') or die("No script hack please!");
class Ajax_Only{
//Check ajax	
public function check_ajax($nounce, $var)
  {
  if (function_exists('current_user_can') &&
    !current_user_can('manage_options') )
    die (_e('Access Forbidden', 'blue-squirrel'));

  if (function_exists('check_ajax_referer'))
    {
    check_ajax_referer($nounce, $var);
    }
  }
  //Getting image info through ajax
	public function get_image_info(){
	if (isset($_POST['txt_save_ajax']))
    {
      $this->check_ajax('img_query_nonce', 'nonce');
      
	  $result = array();

	  $attachments = $_POST['attachments'];
	  foreach ($attachments as $key=>$attach)
	  {
		  if ($attach == 0)
			$result[$key] = "";
			else
			{
				$result[$key] = array();
				$result[$key]['image'] = wp_get_attachment_image($attach);
				$result[$key]['img_info'] = $this->clean_output(wp_get_attachment_metadata($attach));
				$result[$key]['img_path_dir'] = dirname(wp_get_attachment_image_src($attach)[0])."/";
			}
	  }
	       
      echo json_encode($result);
    }
	exit(); 

	}
	
  //Getting image alt through ajax
	public function get_image_alt_info(){
	if (isset($_POST['alt_save_ajax']))
    {
      $this->check_ajax('img_alt_query_nonce', 'nonce');
      
	  $result = array();

	  $attachments = $_POST['attachments'];
		
	  foreach ($attachments as $key=>$attach)
	  {
		  if ($attach == 0)
			$result[$key] = "";
			else
			{
				$result[$key] = "";

				$swp = $this->wp_get_attachment($attach);

				$result[$key] = $swp['alt'];
			}
	  }
	       
      echo json_encode($result);
    }
	exit(); 

	}

	//Clean and prepare data
	public function clean_output($data){
		$result = '';
		$last_key = array_reverse(array_keys($data['sizes']))[0];
		foreach ($data['sizes'] as $key=>$size){
			if ($last_key != $key)$delim="+"; else $delim="";
			$result .= $size['width']."*".$size['file'].$delim;
		}
		return $result;
	}
	//Front attachment info
	public function wp_get_attachment( $attachment_id ) {

	$attachment = get_post( $attachment_id );
	return array(
		'alt' => get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true ),
		'title' => $attachment->post_title
	);
}
}
?>