<?php

if ( ! function_exists( 'add_filter' ) ) {
	header( 'Status: 403 Forbidden' );
	header( 'HTTP/1.1 403 Forbidden' );
	exit();
}

class Ahalogy_JSON_API_Attachment
{
  public $id; // Integer
  public $url; // String
  public $slug; // String
  public $title; // String
  public $description; // String
  public $caption; // String
  public $parent; // Integer
  public $mime_type; // String

  public function Ahalogy_JSON_API_Attachment($wp_attachment = null)
  {
    if ($wp_attachment) {
      $this->import_wp_object($wp_attachment);
      if ($this->is_image()) {
        $this->query_images();
      }
    }
  }

  public function import_wp_object($wp_attachment)
  {
    $this->id          = (int) $wp_attachment->ID;
    $this->url         = $wp_attachment->guid;
    $this->slug        = $wp_attachment->post_name;
    $this->title       = html_entity_decode($wp_attachment->post_title, ENT_COMPAT, 'UTF-8');
    $this->description = html_entity_decode($wp_attachment->post_content, ENT_COMPAT, 'UTF-8');
    $this->caption     = html_entity_decode($wp_attachment->post_excerpt, ENT_COMPAT, 'UTF-8');
    $this->parent      = (int) $wp_attachment->post_parent;
    $this->mime_type   = $wp_attachment->post_mime_type;
  }

  public function is_image()
  {
    return substr($this->mime_type, 0, 5) == 'image';
  }

  public function query_images()
  {
    $sizes = array(
      'thumbnail',
      'medium',
      'large',
      'full'
    );
    if (function_exists('get_intermediate_image_sizes')) {
      $sizes = array_merge(array(
        'full'
      ), get_intermediate_image_sizes());
    }
    $this->images = array();
    $home         = get_bloginfo('url');
    foreach ($sizes as $size) {
      list($url, $width, $height) = wp_get_attachment_image_src($this->id, $size);
      $filename = ABSPATH . substr($url, strlen($home) + 1);
      if (file_exists($filename)) {
        list($measured_width, $measured_height) = getimagesize($filename);
        if ($measured_width == $width && $measured_height == $height) {
          $this->images[$size] = (object) array(
            'url' => $url,
            'width' => $width,
            'height' => $height
          );
        }
      }
    }
  }
}